Merge branch 'od' into on-2

app/build.gradle

@@ -368,8 +368,11 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-idling-resource:3.5.1'
     androidTestUtil 'androidx.test:orchestrator:1.4.2'
 
-    testImplementation 'org.robolectric:robolectric:4.4'
-    testImplementation 'org.robolectric:shadows-multidex:4.4'
+    testImplementation 'org.robolectric:robolectric:4.12.2'
+    testImplementation 'org.robolectric:shadows-multidex:4.12.2'
+    testImplementation 'org.conscrypt:conscrypt-openjdk-uber:2.5.2' // For Robolectric
+    testImplementation 'app.cash.turbine:turbine:1.1.0'
+
 
     implementation 'com.github.bumptech.glide:compose:1.0.0-alpha.5'
     implementation "androidx.compose.ui:ui:$composeVersion"

app/src/main/java/org/thoughtcrime/securesms/AppContext.kt

@@ -5,7 +5,6 @@ import kotlinx.coroutines.asExecutor
 import nl.komponents.kovenant.Kovenant
 import nl.komponents.kovenant.jvm.asDispatcher
 import org.session.libsignal.utilities.Log
-import org.session.libsignal.utilities.ThreadUtils
 import java.util.concurrent.Executors
 
 object AppContext {

app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java

@@ -216,7 +216,6 @@ public class ApplicationContext extends Application implements DefaultLifecycleO
         DatabaseModule.init(this);
         MessagingModuleConfiguration.configure(this);
         super.onCreate();
-
         messagingModuleConfiguration = new MessagingModuleConfiguration(
                 this,
                 storage,
@@ -504,15 +503,23 @@ public class ApplicationContext extends Application implements DefaultLifecycleO
         });
     }
 
+    // Method to clear the local data - returns true on success otherwise false
+
+    /**
+     * Clear all local profile data and message history then restart the app after a brief delay.
+     * @return true on success, false otherwise.
+     */
     @SuppressLint("ApplySharedPref")
-    public void clearAllData() {
+    public boolean clearAllData() {
         TextSecurePreferences.clearAll(this);
         getSharedPreferences(PREFERENCES_NAME, 0).edit().clear().commit();
         if (!deleteDatabase(SQLCipherOpenHelper.DATABASE_NAME)) {
             Log.d("Loki", "Failed to delete database.");
+            return false;
         }
         configFactory.keyPairChanged();
         Util.runOnMain(() -> new Handler().postDelayed(ApplicationContext.this::restartApplication, 200));
+        return true;
     }
 
     public void restartApplication() {

app/src/main/java/org/thoughtcrime/securesms/MediaGalleryAdapter.java

@@ -114,7 +114,7 @@ class MediaGalleryAdapter extends StickyHeaderGridAdapter {
     Slide         slide             = MediaUtil.getSlideForAttachment(context, mediaRecord.getAttachment());
 
     if (slide != null) {
-      thumbnailView.setImageResource(glideRequests, slide, false, null);
+      thumbnailView.setImageResource(glideRequests, slide, false);
     }
 
     thumbnailView.setOnClickListener(view -> itemClickListener.onMediaClicked(mediaRecord));

app/src/main/java/org/thoughtcrime/securesms/contacts/UserView.kt

@@ -7,10 +7,8 @@ import android.view.View
 import android.widget.LinearLayout
 import network.loki.messenger.R
 import network.loki.messenger.databinding.ViewUserBinding
-import org.session.libsession.messaging.MessagingModuleConfiguration
 import org.session.libsession.messaging.contacts.Contact
 import org.session.libsession.utilities.recipients.Recipient
-import org.thoughtcrime.securesms.conversation.v2.utilities.MentionManagerUtilities
 import org.thoughtcrime.securesms.dependencies.DatabaseComponent
 import org.thoughtcrime.securesms.mms.GlideRequests
 

app/src/main/java/org/thoughtcrime/securesms/conversation/ConversationActionBarView.kt

@@ -21,7 +21,6 @@ import org.session.libsession.messaging.open_groups.OpenGroup
 import org.session.libsession.utilities.ExpirationUtil
 import org.session.libsession.utilities.modifyLayoutParams
 import org.session.libsession.utilities.recipients.Recipient
-import org.thoughtcrime.securesms.conversation.v2.utilities.MentionManagerUtilities
 import org.thoughtcrime.securesms.database.GroupDatabase
 import org.thoughtcrime.securesms.database.LokiAPIDatabase
 import org.thoughtcrime.securesms.util.DateUtils
@@ -78,7 +77,6 @@ class ConversationActionBarView @JvmOverloads constructor(
         binding.profilePictureView.layoutParams = resources.getDimensionPixelSize(
             if (recipient.isClosedGroupRecipient) R.dimen.medium_profile_picture_size else R.dimen.small_profile_picture_size
         ).let { LayoutParams(it, it) }
-        MentionManagerUtilities.populateUserPublicKeyCacheIfNeeded(threadId, context)
         update(recipient, openGroup, config)
     }
 

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/AttachmentDownloadHandler.kt

@@ -0,0 +1,115 @@
+package org.thoughtcrime.securesms.conversation.v2
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.channels.Channel.Factory.UNLIMITED
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.receiveAsFlow
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.plus
+import org.session.libsession.database.MessageDataProvider
+import org.session.libsession.database.StorageProtocol
+import org.session.libsession.messaging.jobs.AttachmentDownloadJob
+import org.session.libsession.messaging.jobs.AttachmentUploadJob
+import org.session.libsession.messaging.jobs.JobQueue
+import org.session.libsession.messaging.sending_receiving.attachments.AttachmentTransferProgress
+import org.session.libsession.messaging.sending_receiving.attachments.DatabaseAttachment
+import org.session.libsignal.utilities.Log
+import org.thoughtcrime.securesms.util.flatten
+import org.thoughtcrime.securesms.util.timedBuffer
+
+/**
+ * [AttachmentDownloadHandler] is responsible for handling attachment download requests. These
+ * requests will go through different level of checking before they are queued for download.
+ *
+ * To use this handler, call [onAttachmentDownloadRequest] with the attachment that needs to be
+ * downloaded. The call to [onAttachmentDownloadRequest] is cheap and can be called multiple times.
+ */
+class AttachmentDownloadHandler(
+    private val storage: StorageProtocol,
+    private val messageDataProvider: MessageDataProvider,
+    jobQueue: JobQueue = JobQueue.shared,
+    scope: CoroutineScope = CoroutineScope(Dispatchers.Default) + SupervisorJob(),
+) {
+    companion object {
+        private const val BUFFER_TIMEOUT_MILLS = 500L
+        private const val BUFFER_MAX_ITEMS = 10
+        private const val LOG_TAG = "AttachmentDownloadHelper"
+    }
+
+    private val downloadRequests = Channel<DatabaseAttachment>(UNLIMITED)
+
+    init {
+        scope.launch(Dispatchers.Default) {
+            downloadRequests
+                .receiveAsFlow()
+                .timedBuffer(BUFFER_TIMEOUT_MILLS, BUFFER_MAX_ITEMS)
+                .map(::filterEligibleAttachments)
+                .flatten()
+                .collect { attachment ->
+                    jobQueue.add(
+                        AttachmentDownloadJob(
+                            attachmentID = attachment.attachmentId.rowId,
+                            databaseMessageID = attachment.mmsId
+                        )
+                    )
+                }
+        }
+    }
+
+    /**
+     * Filter attachments that are eligible for creating download jobs.
+     *
+     */
+    private fun filterEligibleAttachments(attachments: List<DatabaseAttachment>): List<DatabaseAttachment> {
+        val pendingAttachmentIDs = storage
+            .getAllPendingJobs(AttachmentDownloadJob.KEY, AttachmentUploadJob.KEY)
+            .values
+            .mapNotNull {
+                (it as? AttachmentUploadJob)?.attachmentID
+                    ?: (it as? AttachmentDownloadJob)?.attachmentID
+            }
+            .toSet()
+
+
+        return attachments.filter { attachment ->
+            eligibleForDownloadTask(
+                attachment,
+                pendingAttachmentIDs,
+            )
+        }
+    }
+
+    /**
+     * Check if the attachment is eligible for download task.
+     */
+    private fun eligibleForDownloadTask(
+        attachment: DatabaseAttachment,
+        pendingJobsAttachmentRowIDs: Set<Long>,
+    ): Boolean {
+        if (attachment.attachmentId.rowId in pendingJobsAttachmentRowIDs) {
+            return false
+        }
+
+        val threadID = storage.getThreadIdForMms(attachment.mmsId)
+
+        return AttachmentDownloadJob.eligibleForDownload(
+            threadID, storage, messageDataProvider, attachment.mmsId,
+        )
+    }
+
+
+    fun onAttachmentDownloadRequest(attachment: DatabaseAttachment) {
+        if (attachment.transferState != AttachmentTransferProgress.TRANSFER_PROGRESS_PENDING) {
+            Log.i(
+                LOG_TAG,
+                "Attachment ${attachment.attachmentId} is not pending, skipping download"
+            )
+            return
+        }
+
+        downloadRequests.trySend(attachment)
+    }
+}

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt

@@ -29,8 +29,8 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.MotionEvent
 import android.view.View
+import android.view.ViewGroup.LayoutParams
 import android.view.WindowManager
-import android.widget.RelativeLayout
 import android.widget.Toast
 import androidx.activity.result.ActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -46,6 +46,7 @@ import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.flowWithLifecycle
 import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
 import androidx.loader.app.LoaderManager
 import androidx.loader.content.Loader
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -67,8 +68,6 @@ import org.session.libsession.messaging.MessagingModuleConfiguration
 import org.session.libsession.messaging.contacts.Contact
 import org.session.libsession.messaging.jobs.AttachmentDownloadJob
 import org.session.libsession.messaging.jobs.JobQueue
-import org.session.libsession.messaging.mentions.Mention
-import org.session.libsession.messaging.mentions.MentionsManager
 import org.session.libsession.messaging.messages.ExpirationConfiguration
 import org.session.libsession.messaging.messages.applyExpiryMode
 import org.session.libsession.messaging.messages.control.DataExtractionNotification
@@ -117,7 +116,8 @@ import org.thoughtcrime.securesms.conversation.v2.dialogs.LinkPreviewDialog
 import org.thoughtcrime.securesms.conversation.v2.input_bar.InputBarButton
 import org.thoughtcrime.securesms.conversation.v2.input_bar.InputBarDelegate
 import org.thoughtcrime.securesms.conversation.v2.input_bar.InputBarRecordingViewDelegate
-import org.thoughtcrime.securesms.conversation.v2.input_bar.mentions.MentionCandidatesView
+import org.thoughtcrime.securesms.conversation.v2.input_bar.mentions.MentionCandidateAdapter
+import org.thoughtcrime.securesms.conversation.v2.mention.MentionViewModel
 import org.thoughtcrime.securesms.conversation.v2.menus.ConversationActionModeCallback
 import org.thoughtcrime.securesms.conversation.v2.menus.ConversationActionModeCallbackDelegate
 import org.thoughtcrime.securesms.conversation.v2.menus.ConversationMenuHelper
@@ -215,6 +215,7 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
     @Inject lateinit var storage: Storage
     @Inject lateinit var reactionDb: ReactionDatabase
     @Inject lateinit var viewModelFactory: ConversationViewModel.AssistedFactory
+    @Inject lateinit var mentionViewModelFactory: MentionViewModel.AssistedFactory
 
     private val screenshotObserver by lazy {
         ScreenshotObserver(this, Handler(Looper.getMainLooper())) {
@@ -228,7 +229,8 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         ViewModelProvider(this, LinkPreviewViewModel.Factory(LinkPreviewRepository()))
             .get(LinkPreviewViewModel::class.java)
     }
-    private val viewModel: ConversationViewModel by viewModels {
+
+    private val threadId: Long by lazy {
         var threadId = intent.getLongExtra(THREAD_ID, -1L)
         if (threadId == -1L) {
             intent.getParcelableExtra<Address>(ADDRESS)?.let { it ->
@@ -248,6 +250,11 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
                 }
             } ?: finish()
         }
+
+        threadId
+    }
+
+    private val viewModel: ConversationViewModel by viewModels {
         viewModelFactory.create(threadId, MessagingModuleConfiguration.shared.getUserED25519KeyPair())
     }
     private var actionMode: ActionMode? = null
@@ -260,11 +267,12 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
     private var isLockViewExpanded = false
     private var isShowingAttachmentOptions = false
     // Mentions
-    private val mentions = mutableListOf<Mention>()
-    private var mentionCandidatesView: MentionCandidatesView? = null
-    private var previousText: CharSequence = ""
-    private var currentMentionStartIndex = -1
-    private var isShowingMentionCandidatesView = false
+    private val mentionViewModel: MentionViewModel by viewModels {
+        mentionViewModelFactory.create(threadId)
+    }
+    private val mentionCandidateAdapter = MentionCandidateAdapter {
+        mentionViewModel.onCandidateSelected(it.member.publicKey)
+    }
     // Search
     val searchViewModel: SearchViewModel by viewModels()
     var searchViewItem: MenuItem? = null
@@ -325,11 +333,7 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
                     onDeselect(message, position, it)
                 }
             },
-            onAttachmentNeedsDownload = { attachmentId, mmsId ->
-                lifecycleScope.launch(Dispatchers.IO) {
-                    JobQueue.shared.add(AttachmentDownloadJob(attachmentId, mmsId))
-                }
-            },
+            onAttachmentNeedsDownload = viewModel::onAttachmentDownloadRequest,
             glide = glide,
             lifecycleCoroutineScope = lifecycleScope
         )
@@ -486,6 +490,27 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
                         }
                     }
         }
+
+        setupMentionView()
+    }
+
+    private fun setupMentionView() {
+        binding?.conversationMentionCandidates?.let { view ->
+            view.adapter = mentionCandidateAdapter
+            view.itemAnimator = null
+        }
+
+        lifecycleScope.launch {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                mentionViewModel.autoCompleteState
+                    .collectLatest { state ->
+                        mentionCandidateAdapter.candidates =
+                            (state as? MentionViewModel.AutoCompleteState.Result)?.members.orEmpty()
+                    }
+            }
+        }
+
+        binding?.inputBar?.setInputBarEditableFactory(mentionViewModel.editableFactory)
     }
 
     override fun onResume() {
@@ -642,23 +667,19 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         binding.inputBar.delegate = this
         binding.inputBarRecordingView.delegate = this
         // GIF button
-        binding.gifButtonContainer.addView(gifButton)
-        gifButton.layoutParams = RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT)
+        binding.gifButtonContainer.addView(gifButton, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
         gifButton.onUp = { showGIFPicker() }
         gifButton.snIsEnabled = false
         // Document button
-        binding.documentButtonContainer.addView(documentButton)
-        documentButton.layoutParams = RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT)
+        binding.documentButtonContainer.addView(documentButton, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
         documentButton.onUp = { showDocumentPicker() }
         documentButton.snIsEnabled = false
         // Library button
-        binding.libraryButtonContainer.addView(libraryButton)
-        libraryButton.layoutParams = RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT)
+        binding.libraryButtonContainer.addView(libraryButton, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
         libraryButton.onUp = { pickFromLibrary() }
         libraryButton.snIsEnabled = false
         // Camera button
-        binding.cameraButtonContainer.addView(cameraButton)
-        cameraButton.layoutParams = RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT)
+        binding.cameraButtonContainer.addView(cameraButton, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
         cameraButton.onUp = { showCamera() }
         cameraButton.snIsEnabled = false
     }
@@ -910,7 +931,6 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         if (textSecurePreferences.isLinkPreviewsEnabled()) {
             linkPreviewViewModel.onTextChanged(this, inputBarText, 0, 0)
         }
-        showOrHideMentionCandidatesIfNeeded(newContent)
         if (LinkPreviewUtil.findWhitelistedUrls(newContent.toString()).isNotEmpty()
             && !textSecurePreferences.isLinkPreviewsEnabled() && !textSecurePreferences.hasSeenLinkPreviewSuggestionDialog()) {
             LinkPreviewDialog {
@@ -922,76 +942,6 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         }
     }
 
-    private fun showOrHideMentionCandidatesIfNeeded(text: CharSequence) {
-        if (text.length < previousText.length) {
-            currentMentionStartIndex = -1
-            hideMentionCandidates()
-            val mentionsToRemove = mentions.filter { !text.contains(it.displayName) }
-            mentions.removeAll(mentionsToRemove)
-        }
-        if (text.isNotEmpty()) {
-            val lastCharIndex = text.lastIndex
-            val lastChar = text[lastCharIndex]
-            // Check if there is whitespace before the '@' or the '@' is the first character
-            val isCharacterBeforeLastWhiteSpaceOrStartOfLine: Boolean
-            if (text.length == 1) {
-                isCharacterBeforeLastWhiteSpaceOrStartOfLine = true // Start of line
-            } else {
-                val charBeforeLast = text[lastCharIndex - 1]
-                isCharacterBeforeLastWhiteSpaceOrStartOfLine = Character.isWhitespace(charBeforeLast)
-            }
-            if (lastChar == '@' && isCharacterBeforeLastWhiteSpaceOrStartOfLine) {
-                currentMentionStartIndex = lastCharIndex
-                showOrUpdateMentionCandidatesIfNeeded()
-            } else if (Character.isWhitespace(lastChar) || lastChar == '@') { // the lastCharacter == "@" is to check for @@
-                currentMentionStartIndex = -1
-                hideMentionCandidates()
-            } else if (currentMentionStartIndex != -1) {
-                val query = text.substring(currentMentionStartIndex + 1) // + 1 to get rid of the "@"
-                showOrUpdateMentionCandidatesIfNeeded(query)
-            }
-        } else {
-            currentMentionStartIndex = -1
-            hideMentionCandidates()
-        }
-        previousText = text
-    }
-
-    private fun showOrUpdateMentionCandidatesIfNeeded(query: String = "") {
-        val additionalContentContainer = binding?.additionalContentContainer ?: return
-        val recipient = viewModel.recipient ?: return
-        if (!isShowingMentionCandidatesView) {
-            additionalContentContainer.removeAllViews()
-            val view = MentionCandidatesView(this).apply {
-                contentDescription = context.getString(R.string.AccessibilityId_mentions_list)
-            }
-            view.glide = glide
-            view.onCandidateSelected = { handleMentionSelected(it) }
-            additionalContentContainer.addView(view)
-            val candidates = MentionsManager.getMentionCandidates(query, viewModel.threadId, recipient.isCommunityRecipient)
-            this.mentionCandidatesView = view
-            view.show(candidates, viewModel.threadId)
-        } else {
-            val candidates = MentionsManager.getMentionCandidates(query, viewModel.threadId, recipient.isCommunityRecipient)
-            this.mentionCandidatesView!!.setMentionCandidates(candidates)
-        }
-        isShowingMentionCandidatesView = true
-    }
-
-    private fun hideMentionCandidates() {
-        if (isShowingMentionCandidatesView) {
-            val mentionCandidatesView = mentionCandidatesView ?: return
-            val animation = ValueAnimator.ofObject(FloatEvaluator(), mentionCandidatesView.alpha, 0.0f)
-            animation.duration = 250L
-            animation.addUpdateListener { animator ->
-                mentionCandidatesView.alpha = animator.animatedValue as Float
-                if (animator.animatedFraction == 1.0f) { binding?.additionalContentContainer?.removeAllViews() }
-            }
-            animation.start()
-        }
-        isShowingMentionCandidatesView = false
-    }
-
     override fun toggleAttachmentOptions() {
         val targetAlpha = if (isShowingAttachmentOptions) 0.0f else 1.0f
         val allButtonContainers = listOfNotNull(
@@ -1507,18 +1457,6 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         return hitRect.contains(x, y)
     }
 
-    private fun handleMentionSelected(mention: Mention) {
-        val binding = binding ?: return
-        if (currentMentionStartIndex == -1) { return }
-        mentions.add(mention)
-        val previousText = binding.inputBar.text
-        val newText = previousText.substring(0, currentMentionStartIndex) + "@" + mention.displayName + " "
-        binding.inputBar.text = newText
-        binding.inputBar.setSelection(newText.length)
-        currentMentionStartIndex = -1
-        hideMentionCandidates()
-        this.previousText = newText
-    }
 
     override fun scrollToMessageIfPossible(timestamp: Long) {
         val lastSeenItemPosition = adapter.getItemPositionForTimestamp(timestamp) ?: return
@@ -1615,10 +1553,6 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         binding?.inputBar?.text = ""
         binding?.inputBar?.cancelQuoteDraft()
         binding?.inputBar?.cancelLinkPreviewDraft()
-        // Clear mentions
-        previousText = ""
-        currentMentionStartIndex = -1
-        mentions.clear()
         // Put the message in the database
         message.id = smsDb.insertMessageOutbox(viewModel.threadId, outgoingTextMessage, false, message.sentTimestamp!!, null, true)
         // Send it
@@ -1663,10 +1597,6 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         binding?.inputBar?.text = ""
         binding?.inputBar?.cancelQuoteDraft()
         binding?.inputBar?.cancelLinkPreviewDraft()
-        // Clear mentions
-        previousText = ""
-        currentMentionStartIndex = -1
-        mentions.clear()
         // Reset the attachment manager
         attachmentManager.clear()
         // Reset attachments button if needed
@@ -1953,7 +1883,13 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         val messageIterator = sortedMessages.iterator()
         while (messageIterator.hasNext()) {
             val message = messageIterator.next()
-            val body = MentionUtilities.highlightMentions(message.body, viewModel.threadId, this)
+            val body = MentionUtilities.highlightMentions(
+                text = message.body,
+                formatOnly = true, // no styling here, only text formatting
+                threadID = viewModel.threadId,
+                context = this
+            )
+
             if (TextUtils.isEmpty(body)) { continue }
             if (messageSize > 1) {
                 val formattedTimestamp = DateUtils.getDisplayFormattedTimeSpanString(this, Locale.getDefault(), message.timestamp)
@@ -2094,17 +2030,7 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
 
     // region General
     private fun getMessageBody(): String {
-        var result = binding?.inputBar?.text?.trim() ?: return ""
-        for (mention in mentions) {
-            try {
-                val startIndex = result.indexOf("@" + mention.displayName)
-                val endIndex = startIndex + mention.displayName.count() + 1 // + 1 to include the "@"
-                result = result.substring(0, startIndex) + "@" + mention.publicKey + result.substring(endIndex)
-            } catch (exception: Exception) {
-                Log.d("Loki", "Failed to process mention due to error: $exception")
-            }
-        }
-        return result
+        return mentionViewModel.normalizeMessageBody()
     }
     // endregion
 

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationAdapter.kt

@@ -19,6 +19,7 @@ import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import network.loki.messenger.R
 import org.session.libsession.messaging.contacts.Contact
+import org.session.libsession.messaging.sending_receiving.attachments.DatabaseAttachment
 import org.thoughtcrime.securesms.conversation.v2.messages.ControlMessageView
 import org.thoughtcrime.securesms.conversation.v2.messages.VisibleMessageView
 import org.thoughtcrime.securesms.conversation.v2.messages.VisibleMessageViewDelegate
@@ -40,7 +41,7 @@ class ConversationAdapter(
     private val onItemSwipeToReply: (MessageRecord, Int) -> Unit,
     private val onItemLongPress: (MessageRecord, Int, VisibleMessageView) -> Unit,
     private val onDeselect: (MessageRecord, Int) -> Unit,
-    private val onAttachmentNeedsDownload: (Long, Long) -> Unit,
+    private val onAttachmentNeedsDownload: (DatabaseAttachment) -> Unit,
     private val glide: GlideRequests,
     lifecycleCoroutineScope: LifecycleCoroutineScope
 ) : CursorRecyclerViewAdapter<ViewHolder>(context, cursor) {

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationViewModel.kt

@@ -1,46 +1,44 @@
 package org.thoughtcrime.securesms.conversation.v2
 
 import android.content.Context
-
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
-
 import com.goterl.lazysodium.utils.KeyPair
-
 import dagger.assisted.Assisted
 import dagger.assisted.AssistedInject
-
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
-
+import org.session.libsession.database.MessageDataProvider
 import org.session.libsession.messaging.messages.ExpirationConfiguration
 import org.session.libsession.messaging.open_groups.OpenGroup
 import org.session.libsession.messaging.open_groups.OpenGroupApi
+import org.session.libsession.messaging.sending_receiving.attachments.DatabaseAttachment
 import org.session.libsession.messaging.utilities.AccountId
 import org.session.libsession.messaging.utilities.SodiumUtilities
 import org.session.libsession.utilities.Address
 import org.session.libsession.utilities.recipients.Recipient
 import org.session.libsignal.utilities.IdPrefix
 import org.session.libsignal.utilities.Log
+import org.thoughtcrime.securesms.database.MmsDatabase
 import org.thoughtcrime.securesms.audio.AudioSlidePlayer
-
 import org.thoughtcrime.securesms.database.Storage
 import org.thoughtcrime.securesms.database.model.MessageRecord
 import org.thoughtcrime.securesms.database.model.MmsMessageRecord
 import org.thoughtcrime.securesms.repository.ConversationRepository
-
 import java.util.UUID
 
 class ConversationViewModel(
     val threadId: Long,
     val edKeyPair: KeyPair?,
     private val repository: ConversationRepository,
-    private val storage: Storage
+    private val storage: Storage,
+    private val messageDataProvider: MessageDataProvider,
+    database: MmsDatabase,
 ) : ViewModel() {
 
     val showSendAfterApprovalText: Boolean
@@ -92,6 +90,11 @@ class ConversationViewModel(
         // allow reactions if the open group is null (normal conversations) or the open group's capabilities include reactions
         get() = (openGroup == null || OpenGroupApi.Capability.REACTIONS.name.lowercase() in serverCapabilities)
 
+    private val attachmentDownloadHandler = AttachmentDownloadHandler(
+        storage = storage,
+        messageDataProvider = messageDataProvider,
+        scope = viewModelScope,
+    )
 
     init {
         viewModelScope.launch(Dispatchers.IO) {
@@ -265,6 +268,10 @@ class ConversationViewModel(
         storage.getLastLegacyRecipient(address.serialize())?.let { Recipient.from(context, Address.fromSerialized(it), false) }
     }
 
+    fun onAttachmentDownloadRequest(attachment: DatabaseAttachment) {
+        attachmentDownloadHandler.onAttachmentDownloadRequest(attachment)
+    }
+
     @dagger.assisted.AssistedFactory
     interface AssistedFactory {
         fun create(threadId: Long, edKeyPair: KeyPair?): Factory
@@ -275,11 +282,20 @@ class ConversationViewModel(
         @Assisted private val threadId: Long,
         @Assisted private val edKeyPair: KeyPair?,
         private val repository: ConversationRepository,
-        private val storage: Storage
+        private val storage: Storage,
+        private val mmsDatabase: MmsDatabase,
+        private val messageDataProvider: MessageDataProvider,
     ) : ViewModelProvider.Factory {
 
         override fun <T : ViewModel> create(modelClass: Class<T>): T {
-            return ConversationViewModel(threadId, edKeyPair, repository, storage) as T
+            return ConversationViewModel(
+                threadId = threadId,
+                edKeyPair = edKeyPair,
+                repository = repository,
+                storage = storage,
+                messageDataProvider = messageDataProvider,
+                database = mmsDatabase
+            ) as T
         }
     }
 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/MessageDetailActivity.kt

@@ -50,6 +50,7 @@ import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.launch
 import network.loki.messenger.R
 import network.loki.messenger.databinding.ViewVisibleMessageContentBinding
+import org.session.libsession.messaging.sending_receiving.attachments.DatabaseAttachment
 import org.thoughtcrime.securesms.MediaPreviewActivity.getPreviewIntent
 import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity
 import org.thoughtcrime.securesms.database.Storage
@@ -146,7 +147,7 @@ fun MessageDetails(
     onResend: (() -> Unit)? = null,
     onDelete: () -> Unit = {},
     onClickImage: (Int) -> Unit = {},
-    onAttachmentNeedsDownload: (Long, Long) -> Unit = { _, _ -> }
+    onAttachmentNeedsDownload: (DatabaseAttachment) -> Unit = { _ -> }
 ) {
     Column(
         modifier = Modifier

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/MessageDetailsViewModel.kt

@@ -124,7 +124,7 @@ class MessageDetailsViewModel @Inject constructor(
         if (slide.transferState == AttachmentTransferProgress.TRANSFER_PROGRESS_FAILED) {
             // Restart download here (on IO thread)
             (slide.asAttachment() as? DatabaseAttachment)?.let { attachment ->
-                onAttachmentNeedsDownload(attachment.attachmentId.rowId, state.mmsRecord.getId())
+                onAttachmentNeedsDownload(attachment)
             }
         }
 
@@ -137,9 +137,9 @@ class MessageDetailsViewModel @Inject constructor(
         }
     }
 
-    fun onAttachmentNeedsDownload(attachmentId: Long, mmsId: Long) {
+    fun onAttachmentNeedsDownload(attachment: DatabaseAttachment) {
         viewModelScope.launch(Dispatchers.IO) {
-            JobQueue.shared.add(AttachmentDownloadJob(attachmentId, mmsId))
+            JobQueue.shared.add(AttachmentDownloadJob(attachment.attachmentId.rowId, attachment.mmsId))
         }
     }
 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/components/AlbumThumbnailView.kt

@@ -48,7 +48,7 @@ class AlbumThumbnailView : RelativeLayout {
 
     // region Interaction
 
-    fun calculateHitObject(event: MotionEvent, mms: MmsMessageRecord, threadRecipient: Recipient, onAttachmentNeedsDownload: (Long, Long) -> Unit) {
+    fun calculateHitObject(event: MotionEvent, mms: MmsMessageRecord, threadRecipient: Recipient, onAttachmentNeedsDownload: (DatabaseAttachment) -> Unit) {
         val rawXInt = event.rawX.toInt()
         val rawYInt = event.rawY.toInt()
         val eventRect = Rect(rawXInt, rawYInt, rawXInt, rawYInt)
@@ -63,7 +63,7 @@ class AlbumThumbnailView : RelativeLayout {
                 if (slide.transferState == AttachmentTransferProgress.TRANSFER_PROGRESS_FAILED) {
                     // Restart download here (on IO thread)
                     (slide.asAttachment() as? DatabaseAttachment)?.let { attachment ->
-                        onAttachmentNeedsDownload(attachment.attachmentId.rowId, mms.getId())
+                        onAttachmentNeedsDownload(attachment)
                     }
                 }
                 if (slide.isInProgress) return@forEach
@@ -104,7 +104,7 @@ class AlbumThumbnailView : RelativeLayout {
         // iterate binding
         slides.take(MAX_ALBUM_DISPLAY_SIZE).forEachIndexed { position, slide ->
             val thumbnailView = getThumbnailView(position)
-            thumbnailView.setImageResource(glideRequests, slide, isPreview = false, mms = message)
+            thumbnailView.setImageResource(glideRequests, slide, isPreview = false)
         }
     }
 

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/components/LinkPreviewDraftView.kt

@@ -31,10 +31,10 @@ class LinkPreviewDraftView : LinearLayout {
         // Hide the loader and show the content view
         binding.linkPreviewDraftContainer.isVisible = true
         binding.linkPreviewDraftLoader.isVisible = false
-        binding.thumbnailImageView.root.radius = toPx(4, resources)
+        binding.thumbnailImageView.root.setRoundedCorners(toPx(4, resources))
         if (linkPreview.getThumbnail().isPresent) {
             // This internally fetches the thumbnail
-            binding.thumbnailImageView.root.setImageResource(glide, ImageSlide(context, linkPreview.getThumbnail().get()), false, null)
+            binding.thumbnailImageView.root.setImageResource(glide, ImageSlide(context, linkPreview.getThumbnail().get()), false)
         }
         binding.linkPreviewDraftTitleTextView.text = linkPreview.title
     }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/input_bar/InputBar.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.res.Resources
 import android.graphics.PointF
 import android.net.Uri
+import android.text.Editable
 import android.text.InputType
 import android.text.TextWatcher
 import android.util.AttributeSet
@@ -227,8 +228,8 @@ class InputBar : RelativeLayout, InputBarEditTextDelegate, QuoteViewDelegate, Li
         binding.inputBarEditText.addTextChangedListener(listener)
     }
 
-    fun setSelection(index: Int) {
-        binding.inputBarEditText.setSelection(index)
+    fun setInputBarEditableFactory(factory: Editable.Factory) {
+        binding.inputBarEditText.setEditableFactory(factory)
     }
     // endregion
 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/input_bar/mentions/MentionCandidateAdapter.kt

@@ -0,0 +1,44 @@
+package org.thoughtcrime.securesms.conversation.v2.input_bar.mentions
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import network.loki.messenger.databinding.ViewMentionCandidateV2Binding
+import org.thoughtcrime.securesms.conversation.v2.mention.MentionViewModel
+
+class MentionCandidateAdapter(
+    private val onCandidateSelected: ((MentionViewModel.Candidate) -> Unit)
+) : RecyclerView.Adapter<MentionCandidateAdapter.ViewHolder>() {
+    var candidates = listOf<MentionViewModel.Candidate>()
+        set(newValue) {
+            if (field != newValue) {
+                val result = DiffUtil.calculateDiff(object  : DiffUtil.Callback() {
+                    override fun getOldListSize() = field.size
+                    override fun getNewListSize() = newValue.size
+                    override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int)
+                        = field[oldItemPosition].member.publicKey == newValue[newItemPosition].member.publicKey
+                    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int)
+                        = field[oldItemPosition] == newValue[newItemPosition]
+                })
+
+                field = newValue
+                result.dispatchUpdatesTo(this)
+            }
+        }
+
+    class ViewHolder(val binding: ViewMentionCandidateV2Binding)
+        : RecyclerView.ViewHolder(binding.root)
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        return ViewHolder(ViewMentionCandidateV2Binding.inflate(LayoutInflater.from(parent.context), parent, false))
+    }
+
+    override fun getItemCount(): Int = candidates.size
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val candidate = candidates[position]
+        holder.binding.update(candidate)
+        holder.binding.root.setOnClickListener { onCandidateSelected(candidate) }
+    }
+}

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/input_bar/mentions/MentionCandidateView.kt

@@ -1,42 +1,14 @@
 package org.thoughtcrime.securesms.conversation.v2.input_bar.mentions
 
-import android.content.Context
-import android.util.AttributeSet
-import android.view.LayoutInflater
 import android.view.View
-import android.widget.RelativeLayout
 import network.loki.messenger.databinding.ViewMentionCandidateV2Binding
-import org.session.libsession.messaging.mentions.Mention
-import org.thoughtcrime.securesms.groups.OpenGroupManager
-import org.thoughtcrime.securesms.mms.GlideRequests
+import org.thoughtcrime.securesms.conversation.v2.mention.MentionViewModel
 
-class MentionCandidateView : RelativeLayout {
-    private lateinit var binding: ViewMentionCandidateV2Binding
-    var candidate = Mention("", "")
-        set(newValue) { field = newValue; update() }
-    var glide: GlideRequests? = null
-    var openGroupServer: String? = null
-    var openGroupRoom: String? = null
-
-    constructor(context: Context) : this(context, null)
-    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
-    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) { initialize() }
-
-    private fun initialize() {
-        binding = ViewMentionCandidateV2Binding.inflate(LayoutInflater.from(context), this, true)
-    }
-
-    private fun update() = with(binding) {
-        mentionCandidateNameTextView.text = candidate.displayName
-        profilePictureView.publicKey = candidate.publicKey
-        profilePictureView.displayName = candidate.displayName
+fun ViewMentionCandidateV2Binding.update(candidate: MentionViewModel.Candidate) {
+    mentionCandidateNameTextView.text = candidate.nameHighlighted
+    profilePictureView.publicKey = candidate.member.publicKey
+    profilePictureView.displayName = candidate.member.name
     profilePictureView.additionalPublicKey = null
     profilePictureView.update()
-        if (openGroupServer != null && openGroupRoom != null) {
-            val isUserModerator = OpenGroupManager.isUserModerator(context, "$openGroupRoom.$openGroupServer", candidate.publicKey)
-            moderatorIconImageView.visibility = if (isUserModerator) View.VISIBLE else View.GONE
-        } else {
-            moderatorIconImageView.visibility = View.GONE
-        }
-    }
+    moderatorIconImageView.visibility = if (candidate.member.isModerator) View.VISIBLE else View.GONE
 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/input_bar/mentions/MentionCandidatesView.kt

@@ -1,90 +0,0 @@
-package org.thoughtcrime.securesms.conversation.v2.input_bar.mentions
-
-import android.content.Context
-import android.util.AttributeSet
-import android.view.View
-import android.view.ViewGroup
-import android.widget.BaseAdapter
-import android.widget.ListView
-import dagger.hilt.android.AndroidEntryPoint
-import network.loki.messenger.R
-import org.session.libsession.messaging.mentions.Mention
-import org.thoughtcrime.securesms.database.LokiThreadDatabase
-import org.thoughtcrime.securesms.mms.GlideRequests
-import org.thoughtcrime.securesms.util.toPx
-import javax.inject.Inject
-
-@AndroidEntryPoint
-class MentionCandidatesView(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : ListView(context, attrs, defStyleAttr) {
-    private var candidates = listOf<Mention>()
-        set(newValue) { field = newValue; snAdapter.candidates = newValue }
-    var glide: GlideRequests? = null
-        set(newValue) { field = newValue; snAdapter.glide = newValue }
-    var openGroupServer: String? = null
-        set(newValue) { field = newValue; snAdapter.openGroupServer = openGroupServer }
-    var openGroupRoom: String? = null
-        set(newValue) { field = newValue; snAdapter.openGroupRoom = openGroupRoom }
-    var onCandidateSelected: ((Mention) -> Unit)? = null
-
-    @Inject lateinit var threadDb: LokiThreadDatabase
-
-    private val snAdapter by lazy { Adapter(context) }
-
-    private class Adapter(private val context: Context) : BaseAdapter() {
-        var candidates = listOf<Mention>()
-            set(newValue) { field = newValue; notifyDataSetChanged() }
-        var glide: GlideRequests? = null
-        var openGroupServer: String? = null
-        var openGroupRoom: String? = null
-
-        override fun getCount(): Int { return candidates.count() }
-        override fun getItemId(position: Int): Long { return position.toLong() }
-        override fun getItem(position: Int): Mention { return candidates[position] }
-
-        override fun getView(position: Int, cellToBeReused: View?, parent: ViewGroup): View {
-            val cell = cellToBeReused as MentionCandidateView? ?: MentionCandidateView(context).apply {
-                contentDescription = context.getString(R.string.AccessibilityId_contact)
-            }
-            val mentionCandidate = getItem(position)
-            cell.glide = glide
-            cell.candidate = mentionCandidate
-            cell.openGroupServer = openGroupServer
-            cell.openGroupRoom = openGroupRoom
-            return cell
-        }
-    }
-
-    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
-    constructor(context: Context) : this(context, null)
-
-    init {
-        clipToOutline = true
-        adapter = snAdapter
-        snAdapter.candidates = candidates
-        setOnItemClickListener { _, _, position, _ ->
-            onCandidateSelected?.invoke(candidates[position])
-        }
-    }
-
-    fun show(candidates: List<Mention>, threadID: Long) {
-        val openGroup = threadDb.getOpenGroupChat(threadID)
-        if (openGroup != null) {
-            openGroupServer = openGroup.server
-            openGroupRoom = openGroup.room
-        }
-        setMentionCandidates(candidates)
-    }
-
-    fun setMentionCandidates(candidates: List<Mention>) {
-        this.candidates = candidates
-        val layoutParams = this.layoutParams as ViewGroup.LayoutParams
-        layoutParams.height = toPx(Math.min(candidates.count(), 4) * 44, resources)
-        this.layoutParams = layoutParams
-    }
-
-    fun hide() {
-        val layoutParams = this.layoutParams as ViewGroup.LayoutParams
-        layoutParams.height = 0
-        this.layoutParams = layoutParams
-    }
-}

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/mention/MentionEditable.kt

@@ -0,0 +1,188 @@
+package org.thoughtcrime.securesms.conversation.v2.mention
+
+import android.text.Selection
+import android.text.SpannableStringBuilder
+import androidx.core.text.getSpans
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onStart
+
+private const val SEARCH_QUERY_DEBOUNCE_MILLS = 100L
+
+/**
+ * A subclass of [SpannableStringBuilder] that provides a way to observe the mention search query,
+ * and also manages the [MentionSpan] in a way that treats the mention span as a whole.
+ */
+class MentionEditable : SpannableStringBuilder() {
+    private val queryChangeNotification = MutableSharedFlow<Unit>(
+        extraBufferCapacity = 1,
+        onBufferOverflow = BufferOverflow.DROP_LATEST
+    )
+
+    fun observeMentionSearchQuery(): Flow<SearchQuery?> {
+        @Suppress("OPT_IN_USAGE")
+        return queryChangeNotification
+            .debounce(SEARCH_QUERY_DEBOUNCE_MILLS)
+            .onStart { emit(Unit) }
+            .map { mentionSearchQuery }
+            .distinctUntilChanged()
+    }
+
+    data class SearchQuery(
+        val mentionSymbolStartAt: Int,
+        val query: String
+    )
+
+    val mentionSearchQuery: SearchQuery?
+        get() {
+            val cursorPosition = Selection.getSelectionStart(this)
+
+            // First, make sure we are not selecting text
+            if (cursorPosition != Selection.getSelectionEnd(this)) {
+                return null
+            }
+
+            // Make sure we don't already have a mention span at the cursor position
+            if (getSpans(cursorPosition, cursorPosition, MentionSpan::class.java).isNotEmpty()) {
+                return null
+            }
+
+            // Find the mention symbol '@' before the cursor position
+            val symbolIndex = findEligibleMentionSymbolIndexBefore(cursorPosition - 1)
+            if (symbolIndex < 0) {
+                return null
+            }
+
+            // The query starts after the symbol '@' and ends at a whitespace, @ or the end
+            val queryStart = symbolIndex + 1
+            var queryEnd = indexOfStartingAt(queryStart) { it.isWhitespace() || it == '@' }
+            if (queryEnd < 0) {
+                queryEnd = length
+            }
+
+            return SearchQuery(
+                mentionSymbolStartAt = symbolIndex,
+                query = subSequence(queryStart, queryEnd).toString()
+            )
+        }
+
+    override fun setSpan(what: Any?, start: Int, end: Int, flags: Int) {
+        var normalisedStart = start
+        var normalisedEnd = end
+
+        val isSelectionStart = what == Selection.SELECTION_START
+        val isSelectionEnd = what == Selection.SELECTION_END
+
+        if (isSelectionStart || isSelectionEnd) {
+            assert(start == end) { "Selection spans must have zero length" }
+            val selection = start
+
+            val mentionSpan = getSpans<MentionSpan>(selection, selection).firstOrNull()
+            if (mentionSpan != null) {
+                val spanStart = getSpanStart(mentionSpan)
+                val spanEnd = getSpanEnd(mentionSpan)
+
+                if (isSelectionStart && selection != spanEnd) {
+                    // A selection start will only be adjusted to the start of the mention span,
+                    // if the selection start is not at the end the mention span. (A selection start
+                    // at the end of the mention span is considered an escape path from the mention span)
+                    normalisedStart = spanStart
+                    normalisedEnd = normalisedStart
+                } else if (isSelectionEnd && selection != spanStart) {
+                    normalisedEnd = spanEnd
+                    normalisedStart = normalisedEnd
+                }
+            }
+
+            queryChangeNotification.tryEmit(Unit)
+        }
+
+        super.setSpan(what, normalisedStart, normalisedEnd, flags)
+    }
+
+    override fun removeSpan(what: Any?) {
+        super.removeSpan(what)
+        queryChangeNotification.tryEmit(Unit)
+    }
+
+    // The only method we need to override
+    override fun replace(st: Int, en: Int, source: CharSequence?, start: Int, end: Int): MentionEditable {
+        // Make sure the mention span is treated like a whole
+        var normalisedStart = st
+        var normalisedEnd = en
+
+        if (st != en) {
+            // Find the mention span that intersects with the replaced range, and expand the range to include it,
+            // this does not apply to insertion operation (st == en)
+            for (mentionSpan in getSpans(st, en, MentionSpan::class.java)) {
+                val mentionStart = getSpanStart(mentionSpan)
+                val mentionEnd = getSpanEnd(mentionSpan)
+
+                if (mentionStart < normalisedStart) {
+                    normalisedStart = mentionStart
+                }
+                if (mentionEnd > normalisedEnd) {
+                    normalisedEnd = mentionEnd
+                }
+
+                removeSpan(mentionSpan)
+            }
+        }
+
+        super.replace(normalisedStart, normalisedEnd, source, start, end)
+        queryChangeNotification.tryEmit(Unit)
+        return this
+    }
+
+    fun addMention(member: MentionViewModel.Member, replaceRange: IntRange) {
+        val replaceWith = "@${member.name} "
+        replace(replaceRange.first, replaceRange.last, replaceWith)
+        setSpan(
+            MentionSpan(member),
+            replaceRange.first,
+            replaceRange.first + replaceWith.length - 1,
+            SPAN_EXCLUSIVE_EXCLUSIVE
+        )
+    }
+
+    override fun delete(st: Int, en: Int) = replace(st, en, "", 0, 0)
+
+    private fun findEligibleMentionSymbolIndexBefore(offset: Int): Int {
+        if (isEmpty()) {
+            return -1
+        }
+
+        var i = offset.coerceIn(indices)
+        while (i >= 0) {
+            val c = get(i)
+            if (c == '@') {
+                // Make sure there is no more '@' before this one or it's disqualified
+                if (i > 0 && get(i - 1) == '@') {
+                    return -1
+                }
+
+                return i
+            } else if (c.isWhitespace()) {
+                break
+            }
+            i--
+        }
+        return -1
+    }
+}
+
+private fun CharSequence.indexOfStartingAt(offset: Int, predicate: (Char) -> Boolean): Int {
+    var i = offset.coerceIn(0..length)
+    while (i < length) {
+        if (predicate(get(i))) {
+            return i
+        }
+        i++
+    }
+
+    return -1
+}

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/mention/MentionSpan.kt

@@ -0,0 +1,8 @@
+package org.thoughtcrime.securesms.conversation.v2.mention
+
+/**
+ * A span that represents a mention in the text.
+ */
+class MentionSpan(
+    val member: MentionViewModel.Member
+)

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/mention/MentionViewModel.kt

@@ -0,0 +1,274 @@
+package org.thoughtcrime.securesms.conversation.v2.mention
+
+import android.content.ContentResolver
+import android.graphics.Typeface
+import android.text.Editable
+import android.text.SpannableStringBuilder
+import android.text.Spanned
+import android.text.style.StyleSpan
+import androidx.core.text.getSpans
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedInject
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.mapLatest
+import kotlinx.coroutines.flow.onStart
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.withContext
+import org.session.libsession.messaging.contacts.Contact
+import org.thoughtcrime.securesms.database.DatabaseContentProviders.Conversation
+import org.thoughtcrime.securesms.database.GroupDatabase
+import org.thoughtcrime.securesms.database.GroupMemberDatabase
+import org.thoughtcrime.securesms.database.MmsDatabase
+import org.thoughtcrime.securesms.database.SessionContactDatabase
+import org.thoughtcrime.securesms.database.Storage
+import org.thoughtcrime.securesms.database.ThreadDatabase
+import org.thoughtcrime.securesms.util.observeChanges
+
+/**
+ * A ViewModel that provides the mention search functionality for a text input.
+ *
+ * To use this ViewModel, you (a view) will need to:
+ * 1. Observe the [autoCompleteState] to get the mention search results.
+ * 2. Set the EditText's editable factory to [editableFactory], via [android.widget.EditText.setEditableFactory]
+ */
+class MentionViewModel(
+    threadID: Long,
+    contentResolver: ContentResolver,
+    threadDatabase: ThreadDatabase,
+    groupDatabase: GroupDatabase,
+    mmsDatabase: MmsDatabase,
+    contactDatabase: SessionContactDatabase,
+    memberDatabase: GroupMemberDatabase,
+    storage: Storage,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO,
+) : ViewModel() {
+    private val editable = MentionEditable()
+
+    /**
+     * A factory that creates a new [Editable] instance that is backed by the same source of truth
+     * used by this viewModel.
+     */
+    val editableFactory = object : Editable.Factory() {
+        override fun newEditable(source: CharSequence?): Editable {
+            if (source === editable) {
+                return source
+            }
+
+            if (source != null) {
+                editable.replace(0, editable.length, source)
+            }
+
+            return editable
+        }
+    }
+
+    @Suppress("OPT_IN_USAGE")
+    private val members: StateFlow<List<Member>?> =
+        (contentResolver.observeChanges(Conversation.getUriForThread(threadID)) as Flow<Any?>)
+            .debounce(500L)
+            .onStart { emit(Unit) }
+            .mapLatest {
+                val recipient = checkNotNull(threadDatabase.getRecipientForThreadId(threadID)) {
+                    "Recipient not found for thread ID: $threadID"
+                }
+
+                val memberIDs = when {
+                    recipient.isClosedGroupRecipient -> {
+                        groupDatabase.getGroupMemberAddresses(recipient.address.toGroupString(), false)
+                            .map { it.serialize() }
+                    }
+
+                    recipient.isCommunityRecipient -> mmsDatabase.getRecentChatMemberIDs(threadID, 20)
+                    recipient.isContactRecipient -> listOf(recipient.address.serialize())
+                    else -> listOf()
+                }
+
+                val moderatorIDs = if (recipient.isCommunityRecipient) {
+                    val groupId = storage.getOpenGroup(threadID)?.id
+                    if (groupId.isNullOrBlank()) {
+                        emptySet()
+                    } else {
+                        memberDatabase.getGroupMembersRoles(groupId, memberIDs)
+                            .mapNotNullTo(hashSetOf()) { (memberId, roles) ->
+                                memberId.takeIf { roles.any { it.isModerator } }
+                            }
+                    }
+                } else {
+                    emptySet()
+                }
+
+                val contactContext = if (recipient.isCommunityRecipient) {
+                    Contact.ContactContext.OPEN_GROUP
+                } else {
+                    Contact.ContactContext.REGULAR
+                }
+
+                contactDatabase.getContacts(memberIDs).map { contact ->
+                    Member(
+                        publicKey = contact.accountID,
+                        name = contact.displayName(contactContext).orEmpty(),
+                        isModerator = contact.accountID in moderatorIDs,
+                    )
+                }
+            }
+            .flowOn(dispatcher)
+            .stateIn(viewModelScope, SharingStarted.WhileSubscribed(10_000L), null)
+
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    val autoCompleteState: StateFlow<AutoCompleteState> = editable
+        .observeMentionSearchQuery()
+        .flatMapLatest { query ->
+            if (query == null) {
+                return@flatMapLatest flowOf(AutoCompleteState.Idle)
+            }
+
+            members.mapLatest { members ->
+                if (members == null) {
+                    return@mapLatest AutoCompleteState.Loading
+                }
+
+                withContext(Dispatchers.Default) {
+                    val filtered = if (query.query.isBlank()) {
+                        members.mapTo(mutableListOf()) { Candidate(it, it.name, 0) }
+                    } else {
+                        members.mapNotNullTo(mutableListOf()) { searchAndHighlight(it, query.query) }
+                    }
+
+                    filtered.sortWith(Candidate.MENTION_LIST_COMPARATOR)
+                    AutoCompleteState.Result(filtered, query.query)
+                }
+            }
+        }
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), AutoCompleteState.Idle)
+
+    private fun searchAndHighlight(
+        haystack: Member,
+        needle: String
+    ): Candidate? {
+        val startIndex = haystack.name.indexOf(needle, ignoreCase = true)
+
+        return if (startIndex >= 0) {
+            val endIndex = startIndex + needle.length
+            val spanned = SpannableStringBuilder(haystack.name)
+            spanned.setSpan(
+                StyleSpan(Typeface.BOLD),
+                startIndex,
+                endIndex,
+                Spanned.SPAN_INCLUSIVE_EXCLUSIVE
+            )
+            Candidate(member = haystack, nameHighlighted = spanned, matchScore = startIndex)
+        } else {
+            null
+        }
+    }
+
+    fun onCandidateSelected(candidatePublicKey: String) {
+        val query = editable.mentionSearchQuery ?: return
+        val autoCompleteState = autoCompleteState.value as? AutoCompleteState.Result ?: return
+        val candidate = autoCompleteState.members.find { it.member.publicKey == candidatePublicKey } ?: return
+
+        editable.addMention(
+            candidate.member,
+            query.mentionSymbolStartAt .. (query.mentionSymbolStartAt + query.query.length + 1)
+        )
+    }
+
+    /**
+     * Given a message body, normalize it by replacing the display name following '@' with their public key.
+     *
+     * As "@123456" is the standard format for mentioning a user, this method will replace "@Alice" with "@123456"
+     */
+    fun normalizeMessageBody(): String {
+        val spansWithRanges = editable.getSpans<MentionSpan>()
+            .mapTo(mutableListOf()) { span ->
+                span to (editable.getSpanStart(span)..editable.getSpanEnd(span))
+            }
+
+        spansWithRanges.sortBy { it.second.first }
+
+        val sb = StringBuilder()
+        var offset = 0
+        for ((span, range) in spansWithRanges) {
+            // Add content before the mention span
+            sb.append(editable, offset, range.first)
+
+            // Replace the mention span with "@public key"
+            sb.append('@').append(span.member.publicKey).append(' ')
+
+            offset = range.last + 1
+        }
+
+        // Add the remaining content
+        sb.append(editable, offset, editable.length)
+        return sb.toString()
+    }
+
+    data class Member(
+        val publicKey: String,
+        val name: String,
+        val isModerator: Boolean,
+    )
+
+    data class Candidate(
+        val member: Member,
+        // The name with the matching keyword highlighted.
+        val nameHighlighted: CharSequence,
+        // The score of matching the query keyword. Lower is better.
+        val matchScore: Int,
+    ) {
+        companion object {
+            val MENTION_LIST_COMPARATOR = compareBy<Candidate> { it.matchScore }
+                .then(compareBy { it.member.name })
+        }
+    }
+
+    sealed interface AutoCompleteState {
+        object Idle : AutoCompleteState
+        object Loading : AutoCompleteState
+        data class Result(val members: List<Candidate>, val query: String) : AutoCompleteState
+        object Error : AutoCompleteState
+    }
+
+    @dagger.assisted.AssistedFactory
+    interface AssistedFactory {
+        fun create(threadId: Long): Factory
+    }
+
+    class Factory @AssistedInject constructor(
+        @Assisted private val threadId: Long,
+        private val contentResolver: ContentResolver,
+        private val threadDatabase: ThreadDatabase,
+        private val groupDatabase: GroupDatabase,
+        private val mmsDatabase: MmsDatabase,
+        private val contactDatabase: SessionContactDatabase,
+        private val storage: Storage,
+        private val memberDatabase: GroupMemberDatabase,
+    ) : ViewModelProvider.Factory {
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(modelClass: Class<T>): T {
+            return MentionViewModel(
+                threadID = threadId,
+                contentResolver = contentResolver,
+                threadDatabase = threadDatabase,
+                groupDatabase = groupDatabase,
+                mmsDatabase = mmsDatabase,
+                contactDatabase = contactDatabase,
+                memberDatabase = memberDatabase,
+                storage = storage,
+            ) as T
+        }
+    }
+}

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/LinkPreviewView.kt

@@ -41,7 +41,7 @@ class LinkPreviewView : LinearLayout {
         // Thumbnail
         if (linkPreview.getThumbnail().isPresent) {
             // This internally fetches the thumbnail
-            binding.thumbnailImageView.root.setImageResource(glide, ImageSlide(context, linkPreview.getThumbnail().get()), isPreview = false, message)
+            binding.thumbnailImageView.root.setImageResource(glide, ImageSlide(context, linkPreview.getThumbnail().get()), isPreview = false)
             binding.thumbnailImageView.root.loadIndicator.isVisible = false
         }
         // Title

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/QuoteView.kt

@@ -80,7 +80,15 @@ class QuoteView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
         binding.quoteViewAuthorTextView.text = authorDisplayName
         binding.quoteViewAuthorTextView.setTextColor(getTextColor(isOutgoingMessage))
         // Body
-        binding.quoteViewBodyTextView.text = if (isOpenGroupInvitation) resources.getString(R.string.open_group_invitation_view__open_group_invitation) else MentionUtilities.highlightMentions((body ?: "").toSpannable(), threadID, context)
+        binding.quoteViewBodyTextView.text = if (isOpenGroupInvitation)
+            resources.getString(R.string.open_group_invitation_view__open_group_invitation)
+        else MentionUtilities.highlightMentions(
+            text = (body ?: "").toSpannable(),
+            isOutgoingMessage = isOutgoingMessage,
+            isQuote = true,
+            threadID = threadID,
+            context = context
+        )
         binding.quoteViewBodyTextView.setTextColor(getTextColor(isOutgoingMessage))
         // Accent line / attachment preview
         val hasAttachments = (attachments != null && attachments.asAttachments().isNotEmpty()) && !isOriginalMissing
@@ -108,8 +116,9 @@ class QuoteView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
                 attachments.thumbnailSlide != null -> {
                     val slide = attachments.thumbnailSlide!!
                     // This internally fetches the thumbnail
-                    binding.quoteViewAttachmentThumbnailImageView.root.radius = toPx(4, resources)
-                    binding.quoteViewAttachmentThumbnailImageView.root.setImageResource(glide, slide, false, null)
+                    binding.quoteViewAttachmentThumbnailImageView
+                        .root.setRoundedCorners(toPx(4, resources))
+                    binding.quoteViewAttachmentThumbnailImageView.root.setImageResource(glide, slide, false)
                     binding.quoteViewAttachmentThumbnailImageView.root.isVisible = true
                     binding.quoteViewBodyTextView.text = if (MediaUtil.isVideo(slide.asAttachment())) resources.getString(R.string.Slide_video) else resources.getString(R.string.Slide_image)
                 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/VisibleMessageContentView.kt

@@ -66,7 +66,7 @@ class VisibleMessageContentView : ConstraintLayout {
         thread: Recipient,
         searchQuery: String? = null,
         contactIsTrusted: Boolean = true,
-        onAttachmentNeedsDownload: (Long, Long) -> Unit,
+        onAttachmentNeedsDownload: (DatabaseAttachment) -> Unit,
         suppressThumbnails: Boolean = false
     ) {
         // Background
@@ -135,19 +135,11 @@ class VisibleMessageContentView : ConstraintLayout {
         if (message is MmsMessageRecord) {
             message.slideDeck.asAttachments().forEach { attach ->
                 val dbAttachment = attach as? DatabaseAttachment ?: return@forEach
-                val attachmentId = dbAttachment.attachmentId.rowId
-                if (attach.transferState == AttachmentTransferProgress.TRANSFER_PROGRESS_PENDING
-                    && MessagingModuleConfiguration.shared.storage.getAttachmentUploadJob(attachmentId) == null) {
-                    onAttachmentNeedsDownload(attachmentId, dbAttachment.mmsId)
-                }
+                onAttachmentNeedsDownload(dbAttachment)
             }
             message.linkPreviews.forEach { preview ->
                 val previewThumbnail = preview.getThumbnail().orNull() as? DatabaseAttachment ?: return@forEach
-                val attachmentId = previewThumbnail.attachmentId.rowId
-                if (previewThumbnail.transferState == AttachmentTransferProgress.TRANSFER_PROGRESS_PENDING
-                    && MessagingModuleConfiguration.shared.storage.getAttachmentUploadJob(attachmentId) == null) {
-                    onAttachmentNeedsDownload(attachmentId, previewThumbnail.mmsId)
-                }
+                onAttachmentNeedsDownload(previewThumbnail)
             }
         }
 
@@ -282,7 +274,12 @@ class VisibleMessageContentView : ConstraintLayout {
         fun getBodySpans(context: Context, message: MessageRecord, searchQuery: String?): Spannable {
             var body = message.body.toSpannable()
 
-            body = MentionUtilities.highlightMentions(body, message.isOutgoing, message.threadId, context)
+            body = MentionUtilities.highlightMentions(
+                text = body,
+                isOutgoingMessage = message.isOutgoing,
+                threadID = message.threadId,
+                context = context
+            )
             body = SearchUtil.getHighlightedSpan(Locale.getDefault(),
                 { BackgroundColorSpan(Color.WHITE) }, body, searchQuery)
             body = SearchUtil.getHighlightedSpan(Locale.getDefault(),

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/VisibleMessageView.kt

@@ -34,6 +34,7 @@ import network.loki.messenger.databinding.ViewstubVisibleMessageMarkerContainerB
 import org.session.libsession.messaging.contacts.Contact
 import org.session.libsession.messaging.contacts.Contact.ContactContext
 import org.session.libsession.messaging.open_groups.OpenGroupApi
+import org.session.libsession.messaging.sending_receiving.attachments.DatabaseAttachment
 import org.session.libsession.utilities.Address
 import org.session.libsession.utilities.ViewUtil
 import org.session.libsession.utilities.getColorFromAttr
@@ -145,7 +146,7 @@ class VisibleMessageView : FrameLayout {
         senderAccountID: String,
         lastSeen: Long,
         delegate: VisibleMessageViewDelegate? = null,
-        onAttachmentNeedsDownload: (Long, Long) -> Unit,
+        onAttachmentNeedsDownload: (DatabaseAttachment) -> Unit,
         lastSentMessageId: Long
     ) {
         replyDisabled = message.isOpenGroupInvitation

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/utilities/MentionManagerUtilities.kt

@@ -1,34 +0,0 @@
-package org.thoughtcrime.securesms.conversation.v2.utilities
-
-import android.content.Context
-import org.session.libsession.messaging.mentions.MentionsManager
-import org.session.libsession.utilities.TextSecurePreferences
-import org.thoughtcrime.securesms.database.model.MessageRecord
-import org.thoughtcrime.securesms.dependencies.DatabaseComponent
-
-object MentionManagerUtilities {
-
-    fun populateUserPublicKeyCacheIfNeeded(threadID: Long, context: Context) {
-        val result = mutableSetOf<String>()
-        val recipient = DatabaseComponent.get(context).threadDatabase().getRecipientForThreadId(threadID) ?: return
-        if (recipient.address.isClosedGroup) {
-            val members = DatabaseComponent.get(context).groupDatabase().getGroupMembers(recipient.address.toGroupString(), false).map { it.address.serialize() }
-            result.addAll(members)
-        } else {
-            val messageDatabase = DatabaseComponent.get(context).mmsSmsDatabase()
-            val reader = messageDatabase.readerFor(messageDatabase.getConversation(threadID, true, 0, 200))
-            var record: MessageRecord? = reader.next
-            while (record != null) {
-                result.add(record.individualRecipient.address.serialize())
-                try {
-                    record = reader.next
-                } catch (exception: Exception) {
-                    record = null
-                }
-            }
-            reader.close()
-            result.add(TextSecurePreferences.getLocalNumber(context)!!)
-        }
-        MentionsManager.userPublicKeyCache[threadID] = result
-    }
-}

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/utilities/MentionUtilities.kt

@@ -1,7 +1,7 @@
 package org.thoughtcrime.securesms.conversation.v2.utilities
 
-import android.app.Application
 import android.content.Context
+import android.graphics.Color
 import android.graphics.Typeface
 import android.text.Spannable
 import android.text.SpannableString
@@ -9,43 +9,60 @@ import android.text.style.BackgroundColorSpan
 import android.text.style.ForegroundColorSpan
 import android.text.style.StyleSpan
 import android.util.Range
-import androidx.appcompat.widget.ThemeUtils
 import androidx.core.content.res.ResourcesCompat
 import network.loki.messenger.R
 import nl.komponents.kovenant.combine.Tuple2
 import org.session.libsession.messaging.contacts.Contact
+import org.session.libsession.messaging.open_groups.OpenGroup
 import org.session.libsession.messaging.utilities.SodiumUtilities
 import org.session.libsession.utilities.TextSecurePreferences
 import org.session.libsession.utilities.ThemeUtil
-import org.session.libsignal.utilities.Log
+import org.session.libsession.utilities.getColorFromAttr
 import org.thoughtcrime.securesms.dependencies.DatabaseComponent
-import org.thoughtcrime.securesms.util.UiModeUtilities
+import org.thoughtcrime.securesms.util.RoundedBackgroundSpan
 import org.thoughtcrime.securesms.util.getAccentColor
-import org.thoughtcrime.securesms.util.getColorResourceIdFromAttr
-import org.thoughtcrime.securesms.util.getMessageTextColourAttr
+import org.thoughtcrime.securesms.util.toPx
 import java.util.regex.Pattern
 
 object MentionUtilities {
 
-    @JvmStatic
-    fun highlightMentions(text: CharSequence, threadID: Long, context: Context): String {
-        return highlightMentions(text, false, threadID, context).toString() // isOutgoingMessage is irrelevant
-    }
+    private val pattern by lazy { Pattern.compile("@[0-9a-fA-F]*") }
 
+    /**
+     * Highlights mentions in a given text.
+     *
+     * @param text The text to highlight mentions in.
+     * @param isOutgoingMessage Whether the message is outgoing.
+     * @param isQuote Whether the message is a quote.
+     * @param formatOnly Whether to only format the mentions. If true we only format the text itself,
+     * for example resolving an accountID to a username. If false we also apply styling, like colors and background.
+     * @param threadID The ID of the thread the message belongs to.
+     * @param context The context to use.
+     * @return A SpannableString with highlighted mentions.
+     */
     @JvmStatic
-    fun highlightMentions(text: CharSequence, isOutgoingMessage: Boolean, threadID: Long, context: Context): SpannableString {
+    fun highlightMentions(
+        text: CharSequence,
+        isOutgoingMessage: Boolean = false,
+        isQuote: Boolean = false,
+        formatOnly: Boolean = false,
+        threadID: Long,
+        context: Context
+    ): SpannableString {
         @Suppress("NAME_SHADOWING") var text = text
-        val pattern = Pattern.compile("@[0-9a-fA-F]*")
+
         var matcher = pattern.matcher(text)
         val mentions = mutableListOf<Tuple2<Range<Int>, String>>()
         var startIndex = 0
         val userPublicKey = TextSecurePreferences.getLocalNumber(context)!!
-        val openGroup = DatabaseComponent.get(context).storage().getOpenGroup(threadID)
+        val openGroup by lazy { DatabaseComponent.get(context).storage().getOpenGroup(threadID) }
+
+        // format the mention text
         if (matcher.find(startIndex)) {
             while (true) {
                 val publicKey = text.subSequence(matcher.start() + 1, matcher.end()).toString() // +1 to get rid of the @
-                val isUserBlindedPublicKey = openGroup?.let { SodiumUtilities.sessionId(userPublicKey, publicKey, it.publicKey) } ?: false
-                val userDisplayName: String? = if (publicKey.equals(userPublicKey, ignoreCase = true) || isUserBlindedPublicKey) {
+                val isYou = isYou(publicKey, userPublicKey, openGroup)
+                val userDisplayName: String? = if (isYou) {
                     context.getString(R.string.MessageRecord_you)
                 } else {
                     val contact = DatabaseComponent.get(context).sessionContactDatabase().getContactWithAccountID(publicKey)
@@ -53,7 +70,8 @@ object MentionUtilities {
                     contact?.displayName(context)
                 }
                 if (userDisplayName != null) {
-                    text = text.subSequence(0, matcher.start()).toString() + "@" + userDisplayName + text.subSequence(matcher.end(), text.length)
+                    val mention = "@$userDisplayName"
+                    text = text.subSequence(0, matcher.start()).toString() + mention + text.subSequence(matcher.end(), text.length)
                     val endIndex = matcher.start() + 1 + userDisplayName.length
                     startIndex = endIndex
                     mentions.add(Tuple2(Range.create(matcher.start(), endIndex), publicKey))
@@ -66,37 +84,83 @@ object MentionUtilities {
         }
         val result = SpannableString(text)
 
-        var mentionTextColour: Int? = null
-        // In dark themes..
-        if (ThemeUtil.isDarkTheme(context)) {
-            // ..we use the standard outgoing message colour for outgoing messages..
-            if (isOutgoingMessage) {
-                val mentionTextColourAttributeId = getMessageTextColourAttr(true)
-                val mentionTextColourResourceId = getColorResourceIdFromAttr(context, mentionTextColourAttributeId)
-                mentionTextColour = ResourcesCompat.getColor(context.resources, mentionTextColourResourceId, context.theme)
-            }
-            else // ..but we use the accent colour for incoming messages (i.e., someone mentioning us)..
-            {
-                mentionTextColour = context.getAccentColor()
-            }
-        }
-        else // ..while in light themes we always just use the incoming or outgoing message text colour for mentions.
-        {
-            val mentionTextColourAttributeId = getMessageTextColourAttr(isOutgoingMessage)
-            val mentionTextColourResourceId = getColorResourceIdFromAttr(context, mentionTextColourAttributeId)
-            mentionTextColour = ResourcesCompat.getColor(context.resources, mentionTextColourResourceId, context.theme)
+        // apply styling if required
+        // Normal text color: black in dark mode and primary text color for light mode
+        val mainTextColor by lazy {
+            if (ThemeUtil.isDarkTheme(context)) context.getColor(R.color.black)
+            else context.getColorFromAttr(android.R.attr.textColorPrimary)
         }
 
+        // Highlighted text color: primary/accent in dark mode and primary text color for light mode
+        val highlightedTextColor by lazy {
+            if (ThemeUtil.isDarkTheme(context)) context.getAccentColor()
+            else context.getColorFromAttr(android.R.attr.textColorPrimary)
+        }
+
+        if(!formatOnly) {
             for (mention in mentions) {
-            result.setSpan(ForegroundColorSpan(mentionTextColour), mention.first.lower, mention.first.upper, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
-            result.setSpan(StyleSpan(Typeface.BOLD), mention.first.lower, mention.first.upper, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
+                val backgroundColor: Int?
+                val foregroundColor: Int?
 
-            // If we're using a light theme then we change the background colour of the mention to be the accent colour
-            if (ThemeUtil.isLightTheme(context)) {
-                val backgroundColour = context.getAccentColor();
-                result.setSpan(BackgroundColorSpan(backgroundColour), mention.first.lower, mention.first.upper, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
+                // quotes
+                if(isQuote) {
+                    backgroundColor = null
+                    // the text color has different rule depending if the message is incoming or outgoing
+                    foregroundColor = if(isOutgoingMessage) null else highlightedTextColor
+                }
+                // incoming message mentioning you
+                else if (isYou(mention.second, userPublicKey, openGroup)) {
+                    backgroundColor = context.getAccentColor()
+                    foregroundColor = mainTextColor
+                }
+                // outgoing message
+                else if (isOutgoingMessage) {
+                    backgroundColor = null
+                    foregroundColor = mainTextColor
+                }
+                // incoming messages mentioning someone else
+                else {
+                    backgroundColor = null
+                    // accent color for dark themes and primary text for light
+                    foregroundColor = highlightedTextColor
+                }
+
+                // apply the background, if any
+                backgroundColor?.let { background ->
+                    result.setSpan(
+                        RoundedBackgroundSpan(
+                            context = context,
+                            textColor = mainTextColor,
+                            backgroundColor = background
+                        ),
+                        mention.first.lower, mention.first.upper, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
+                    )
+                }
+
+                // apply the foreground, if any
+                foregroundColor?.let {
+                    result.setSpan(
+                        ForegroundColorSpan(it),
+                        mention.first.lower,
+                        mention.first.upper,
+                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
+                    )
+                }
+
+                // apply bold on the mention
+                result.setSpan(
+                    StyleSpan(Typeface.BOLD),
+                    mention.first.lower,
+                    mention.first.upper,
+                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
+                )
             }
         }
         return result
     }
+
+    private fun isYou(mentionedPublicKey: String, userPublicKey: String, openGroup: OpenGroup?): Boolean {
+        val isUserBlindedPublicKey = openGroup?.let { SodiumUtilities.sessionId(userPublicKey, mentionedPublicKey, it.publicKey) } ?: false
+        return mentionedPublicKey.equals(userPublicKey, ignoreCase = true) || isUserBlindedPublicKey
+    }
 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/utilities/ThumbnailView.kt

@@ -2,10 +2,13 @@ package org.thoughtcrime.securesms.conversation.v2.utilities
 
 import android.content.Context
 import android.graphics.Bitmap
+import android.graphics.Outline
 import android.graphics.drawable.Drawable
 import android.net.Uri
 import android.util.AttributeSet
+import android.util.TypedValue
 import android.view.View
+import android.view.ViewOutlineProvider
 import android.widget.FrameLayout
 import androidx.core.view.isVisible
 import com.bumptech.glide.load.engine.DiskCacheStrategy
@@ -21,18 +24,17 @@ import org.session.libsignal.utilities.ListenableFuture
 import org.session.libsignal.utilities.SettableFuture
 import org.thoughtcrime.securesms.components.GlideBitmapListeningTarget
 import org.thoughtcrime.securesms.components.GlideDrawableListeningTarget
-import org.thoughtcrime.securesms.database.model.MmsMessageRecord
 import org.thoughtcrime.securesms.mms.DecryptableStreamUriLoader.DecryptableUri
 import org.thoughtcrime.securesms.mms.GlideRequest
 import org.thoughtcrime.securesms.mms.GlideRequests
 import org.thoughtcrime.securesms.mms.Slide
-import kotlin.Boolean
-import kotlin.Int
-import kotlin.getValue
-import kotlin.lazy
-import kotlin.let
 
-open class ThumbnailView: FrameLayout {
+open class ThumbnailView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = 0
+) : FrameLayout(context, attrs, defStyleAttr) {
+
     companion object {
         private const val WIDTH = 0
         private const val HEIGHT = 1
@@ -41,29 +43,28 @@ open class ThumbnailView: FrameLayout {
     private val binding: ThumbnailViewBinding by lazy { ThumbnailViewBinding.bind(this) }
 
     // region Lifecycle
-    constructor(context: Context) : super(context) { initialize(null) }
-    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) { initialize(attrs) }
-    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr) { initialize(attrs) }
 
     val loadIndicator: View by lazy { binding.thumbnailLoadIndicator }
 
     private val dimensDelegate = ThumbnailDimensDelegate()
 
     private var slide: Slide? = null
-    var radius: Int = 0
 
-    private fun initialize(attrs: AttributeSet?) {
-        if (attrs != null) {
-            val typedArray = context.theme.obtainStyledAttributes(attrs, R.styleable.ThumbnailView, 0, 0)
+    init {
+        attrs?.let { context.theme.obtainStyledAttributes(it, R.styleable.ThumbnailView, 0, 0) }
+            ?.apply {
+                dimensDelegate.setBounds(
+                    getDimensionPixelSize(R.styleable.ThumbnailView_minWidth, 0),
+                    getDimensionPixelSize(R.styleable.ThumbnailView_minHeight, 0),
+                    getDimensionPixelSize(R.styleable.ThumbnailView_maxWidth, 0),
+                    getDimensionPixelSize(R.styleable.ThumbnailView_maxHeight, 0)
+                )
 
-            dimensDelegate.setBounds(typedArray.getDimensionPixelSize(R.styleable.ThumbnailView_minWidth, 0),
-                    typedArray.getDimensionPixelSize(R.styleable.ThumbnailView_minHeight, 0),
-                    typedArray.getDimensionPixelSize(R.styleable.ThumbnailView_maxWidth, 0),
-                    typedArray.getDimensionPixelSize(R.styleable.ThumbnailView_maxHeight, 0))
+                setRoundedCorners(
+                    getDimensionPixelSize(R.styleable.ThumbnailView_thumbnail_radius, 0)
+                )
 
-            radius = typedArray.getDimensionPixelSize(R.styleable.ThumbnailView_thumbnail_radius, 0)
-
-            typedArray.recycle()
+                recycle()
             }
     }
 
@@ -84,114 +85,118 @@ open class ThumbnailView: FrameLayout {
 
     private fun getDefaultWidth() = maxOf(layoutParams?.width ?: 0, 0)
     private fun getDefaultHeight() = maxOf(layoutParams?.height ?: 0, 0)
+
     // endregion
 
     // region Interaction
-    fun setImageResource(glide: GlideRequests, slide: Slide, isPreview: Boolean, mms: MmsMessageRecord?): ListenableFuture<Boolean> {
-        return setImageResource(glide, slide, isPreview, 0, 0, mms)
+    fun setRoundedCorners(radius: Int){
+        // create an outline provider and clip the whole view to that shape
+        // that way we can round the image and the background ( and any other artifacts that the view may contain )
+        val mOutlineProvider = object : ViewOutlineProvider() {
+            override fun getOutline(view: View, outline: Outline) {
+                // all corners
+                outline.setRoundRect(0, 0, view.width, view.height, radius.toFloat())
+            }
         }
 
-    fun setImageResource(glide: GlideRequests, slide: Slide,
+        outlineProvider = mOutlineProvider
+        clipToOutline = true
+    }
+
+    fun setImageResource(
+        glide: GlideRequests,
+        slide: Slide,
+        isPreview: Boolean
+    ): ListenableFuture<Boolean> = setImageResource(glide, slide, isPreview, 0, 0)
+
+    fun setImageResource(
+        glide: GlideRequests, slide: Slide,
         isPreview: Boolean, naturalWidth: Int,
-                         naturalHeight: Int, mms: MmsMessageRecord?): ListenableFuture<Boolean> {
-
-        val currentSlide = this.slide
-
+        naturalHeight: Int
+    ): ListenableFuture<Boolean> {
         binding.playOverlay.isVisible = (slide.thumbnailUri != null && slide.hasPlayOverlay() &&
             (slide.transferState == AttachmentTransferProgress.TRANSFER_PROGRESS_DONE || isPreview))
 
-        if (equals(currentSlide, slide)) {
+        if (equals(this.slide, slide)) {
             // don't re-load slide
             return SettableFuture(false)
         }
 
-
-        if (currentSlide != null && currentSlide.fastPreflightId != null && currentSlide.fastPreflightId == slide.fastPreflightId) {
-            // not reloading slide for fast preflight
-            this.slide = slide
-        }
-
         this.slide = slide
 
         binding.thumbnailLoadIndicator.isVisible = slide.isInProgress
-        binding.thumbnailDownloadIcon.isVisible = slide.transferState == AttachmentTransferProgress.TRANSFER_PROGRESS_FAILED
+        binding.thumbnailDownloadIcon.isVisible =
+            slide.transferState == AttachmentTransferProgress.TRANSFER_PROGRESS_FAILED
 
         dimensDelegate.setDimens(naturalWidth, naturalHeight)
         invalidate()
 
-        val result = SettableFuture<Boolean>()
-
+        return SettableFuture<Boolean>().also {
             when {
                 slide.thumbnailUri != null -> {
-                buildThumbnailGlideRequest(glide, slide).into(GlideDrawableListeningTarget(binding.thumbnailImage, binding.thumbnailLoadIndicator, result))
+                    buildThumbnailGlideRequest(glide, slide).into(
+                        GlideDrawableListeningTarget(binding.thumbnailImage, binding.thumbnailLoadIndicator, it)
+                    )
                 }
                 slide.hasPlaceholder() -> {
-                buildPlaceholderGlideRequest(glide, slide).into(GlideBitmapListeningTarget(binding.thumbnailImage, null, result))
+                    buildPlaceholderGlideRequest(glide, slide).into(
+                        GlideBitmapListeningTarget(binding.thumbnailImage, null, it)
+                    )
                 }
                 else -> {
                     glide.clear(binding.thumbnailImage)
-                result.set(false)
+                    it.set(false)
+                }
             }
         }
-        return result
     }
 
-    fun buildThumbnailGlideRequest(glide: GlideRequests, slide: Slide): GlideRequest<Drawable> {
-
-        val dimens = dimensDelegate.resourceSize()
-
-        val request = glide.load(DecryptableUri(slide.thumbnailUri!!))
+    private fun buildThumbnailGlideRequest(
+        glide: GlideRequests,
+        slide: Slide
+    ): GlideRequest<Drawable> = glide.load(DecryptableUri(slide.thumbnailUri!!))
         .diskCacheStrategy(DiskCacheStrategy.NONE)
-                .let { request ->
-                    if (dimens[WIDTH] == 0 || dimens[HEIGHT] == 0) {
-                        request.override(getDefaultWidth(), getDefaultHeight())
-                    } else {
-                        request.override(dimens[WIDTH], dimens[HEIGHT])
-                    }
-                }
+        .overrideDimensions()
         .transition(DrawableTransitionOptions.withCrossFade())
-                .centerCrop()
+        .transform(CenterCrop())
+        .missingThumbnailPicture(slide.isInProgress)
 
-        return if (slide.isInProgress) request else request.apply(RequestOptions.errorOf(R.drawable.ic_missing_thumbnail_picture))
-    }
-
-    fun buildPlaceholderGlideRequest(glide: GlideRequests, slide: Slide): GlideRequest<Bitmap> {
-
-        val dimens = dimensDelegate.resourceSize()
-
-        return glide.asBitmap()
+    private fun buildPlaceholderGlideRequest(
+        glide: GlideRequests,
+        slide: Slide
+    ): GlideRequest<Bitmap> = glide.asBitmap()
         .load(slide.getPlaceholderRes(context.theme))
         .diskCacheStrategy(DiskCacheStrategy.NONE)
-                .let { request ->
-                    if (dimens[WIDTH] == 0 || dimens[HEIGHT] == 0) {
-                        request.override(getDefaultWidth(), getDefaultHeight())
-                    } else {
-                        request.override(dimens[WIDTH], dimens[HEIGHT])
-                    }
-                }
+        .overrideDimensions()
         .fitCenter()
-    }
 
     open fun clear(glideRequests: GlideRequests) {
         glideRequests.clear(binding.thumbnailImage)
         slide = null
     }
 
-    fun setImageResource(glideRequests: GlideRequests, uri: Uri): ListenableFuture<Boolean> {
-        val future = SettableFuture<Boolean>()
-
-        var request: GlideRequest<Drawable> = glideRequests.load(DecryptableUri(uri))
+    fun setImageResource(
+        glideRequests: GlideRequests,
+        uri: Uri
+    ): ListenableFuture<Boolean> = glideRequests.load(DecryptableUri(uri))
         .diskCacheStrategy(DiskCacheStrategy.NONE)
         .transition(DrawableTransitionOptions.withCrossFade())
+        .transform(CenterCrop())
+        .intoDrawableTargetAsFuture()
 
-        request = if (radius > 0) {
-            request.transforms(CenterCrop(), RoundedCorners(radius))
-        } else {
-            request.transforms(CenterCrop())
+    private fun GlideRequest<Drawable>.intoDrawableTargetAsFuture() =
+        SettableFuture<Boolean>().also {
+            binding.run {
+                GlideDrawableListeningTarget(thumbnailImage, thumbnailLoadIndicator, it)
+            }.let { into(it) }
         }
 
-        request.into(GlideDrawableListeningTarget(binding.thumbnailImage, binding.thumbnailLoadIndicator, future))
-
-        return future
-    }
+    private fun <T> GlideRequest<T>.overrideDimensions() =
+        dimensDelegate.resourceSize().takeIf { 0 !in it }
+            ?.let { override(it[WIDTH], it[HEIGHT]) }
+            ?: override(getDefaultWidth(), getDefaultHeight())
 }
+
+private fun <T> GlideRequest<T>.missingThumbnailPicture(
+    inProgress: Boolean
+) = takeIf { inProgress } ?: apply(RequestOptions.errorOf(R.drawable.ic_missing_thumbnail_picture))

app/src/main/java/org/thoughtcrime/securesms/database/GroupMemberDatabase.kt

@@ -3,9 +3,12 @@ package org.thoughtcrime.securesms.database
 import android.content.ContentValues
 import android.content.Context
 import android.database.Cursor
+import org.json.JSONArray
 import org.session.libsession.messaging.open_groups.GroupMember
 import org.session.libsession.messaging.open_groups.GroupMemberRole
 import org.thoughtcrime.securesms.database.helpers.SQLCipherOpenHelper
+import org.thoughtcrime.securesms.util.asSequence
+import java.util.EnumSet
 
 class GroupMemberDatabase(context: Context, helper: SQLCipherOpenHelper) : Database(context, helper) {
 
@@ -51,6 +54,19 @@ class GroupMemberDatabase(context: Context, helper: SQLCipherOpenHelper) : Datab
         return mappings.map { it.role }
     }
 
+    fun getGroupMembersRoles(groupId: String, memberIDs: Collection<String>): Map<String, List<GroupMemberRole>> {
+        val sql = """
+            SELECT * FROM $TABLE_NAME
+            WHERE $GROUP_ID = ? AND $PROFILE_ID IN (SELECT value FROM json_each(?))
+        """.trimIndent()
+
+        return readableDatabase.rawQuery(sql, groupId, JSONArray(memberIDs).toString()).use { cursor ->
+            cursor.asSequence()
+                .map { readGroupMember(it) }
+                .groupBy(keySelector = { it.profileId }, valueTransform = { it.role })
+        }
+    }
+
     fun setGroupMembers(members: List<GroupMember>) {
         writableDatabase.beginTransaction()
         try {

app/src/main/java/org/thoughtcrime/securesms/database/MmsDatabase.kt

@@ -218,6 +218,21 @@ class MmsDatabase(context: Context, databaseHelper: SQLCipherOpenHelper) : Messa
         return cursor
     }
 
+    fun getRecentChatMemberIDs(threadID: Long, limit: Int): List<String> {
+        val sql = """
+            SELECT DISTINCT $ADDRESS FROM $TABLE_NAME
+            WHERE $THREAD_ID = ?
+            ORDER BY $DATE_SENT DESC
+            LIMIT $limit
+        """.trimIndent()
+
+        return databaseHelper.readableDatabase.rawQuery(sql, threadID).use { cursor ->
+            cursor.asSequence()
+                .map { it.getString(0) }
+                .toList()
+        }
+    }
+
     val expireStartedMessages: Reader
         get() {
             val where = "$EXPIRE_STARTED > 0"

app/src/main/java/org/thoughtcrime/securesms/database/SessionContactDatabase.kt

@@ -4,6 +4,7 @@ import android.content.ContentValues
 import android.content.Context
 import android.database.Cursor
 import androidx.core.database.getStringOrNull
+import org.json.JSONArray
 import org.session.libsession.messaging.contacts.Contact
 import org.session.libsession.messaging.utilities.AccountId
 import org.session.libsignal.utilities.Base64
@@ -41,6 +42,15 @@ class SessionContactDatabase(context: Context, helper: SQLCipherOpenHelper) : Da
         }
     }
 
+    fun getContacts(sessionIDs: Collection<String>): List<Contact> {
+        val database = databaseHelper.readableDatabase
+        return database.getAll(
+            sessionContactTable,
+            "$accountID IN (SELECT value FROM json_each(?))",
+            arrayOf(JSONArray(sessionIDs).toString())
+        ) { cursor -> contactFromCursor(cursor) }
+    }
+
     fun getAllContacts(): Set<Contact> {
         val database = databaseHelper.readableDatabase
         return database.getAll(sessionContactTable, null, null) { cursor ->

app/src/main/java/org/thoughtcrime/securesms/database/SessionJobDatabase.kt

@@ -3,6 +3,7 @@ package org.thoughtcrime.securesms.database
 import android.content.ContentValues
 import android.content.Context
 import android.database.Cursor
+import org.json.JSONArray
 import org.session.libsession.messaging.jobs.AttachmentDownloadJob
 import org.session.libsession.messaging.jobs.AttachmentUploadJob
 import org.session.libsession.messaging.jobs.BackgroundGroupAddJob
@@ -50,14 +51,18 @@ class SessionJobDatabase(context: Context, helper: SQLCipherOpenHelper) : Databa
         databaseHelper.writableDatabase.delete(sessionJobTable, "${Companion.jobID} = ?", arrayOf( jobID ))
     }
 
-    fun getAllJobs(type: String): Map<String, Job?> {
+    fun getAllJobs(vararg types: String): Map<String, Job?> {
         val database = databaseHelper.readableDatabase
-        return database.getAll(sessionJobTable, "$jobType = ?", arrayOf( type )) { cursor ->
+        return database.getAll(
+            sessionJobTable,
+            "$jobType IN (SELECT value FROM json_each(?))", // Use json_each to bypass limitation of SQLite's IN operator binding
+            arrayOf( JSONArray(types).toString() )
+        ) { cursor ->
             val jobID = cursor.getString(jobID)
             try {
                 jobID to jobFromCursor(cursor)
             } catch (e: Exception) {
-                Log.e("Loki", "Error deserializing job of type: $type.", e)
+                Log.e("Loki", "Error deserializing job of type: $types.", e)
                 jobID to null
             }
         }.toMap()

app/src/main/java/org/thoughtcrime/securesms/database/Storage.kt

@@ -397,8 +397,8 @@ open class Storage(
         DatabaseComponent.get(context).sessionJobDatabase().markJobAsFailedPermanently(jobId)
     }
 
-    override fun getAllPendingJobs(type: String): Map<String, Job?> {
-        return DatabaseComponent.get(context).sessionJobDatabase().getAllJobs(type)
+    override fun getAllPendingJobs(vararg types: String): Map<String, Job?> {
+        return DatabaseComponent.get(context).sessionJobDatabase().getAllJobs(*types)
     }
 
     override fun getAttachmentUploadJob(attachmentID: Long): AttachmentUploadJob? {

app/src/main/java/org/thoughtcrime/securesms/groups/OpenGroupManager.kt

@@ -162,13 +162,7 @@ object OpenGroupManager {
         val memberDatabase = DatabaseComponent.get(context).groupMemberDatabase()
         val standardRoles = memberDatabase.getGroupMemberRoles(groupId, standardPublicKey)
         val blindedRoles = blindedPublicKey?.let { memberDatabase.getGroupMemberRoles(groupId, it) } ?: emptyList()
-
-        // roles to check against
-        val moderatorRoles = listOf(
-            GroupMemberRole.MODERATOR, GroupMemberRole.ADMIN,
-            GroupMemberRole.HIDDEN_MODERATOR, GroupMemberRole.HIDDEN_ADMIN
-        )
-        return standardRoles.any { it in moderatorRoles } || blindedRoles.any { it in moderatorRoles }
+        return standardRoles.any { it.isModerator } || blindedRoles.any { it.isModerator }
     }
 
 }

app/src/main/java/org/thoughtcrime/securesms/home/ConversationView.kt

@@ -103,7 +103,12 @@ class ConversationView : LinearLayout {
             R.drawable.ic_notifications_mentions
         }
         binding.muteIndicatorImageView.setImageResource(drawableRes)
-        binding.snippetTextView.text = highlightMentions(thread.getSnippet(), thread.threadId, context)
+        binding.snippetTextView.text = highlightMentions(
+            text = thread.getSnippet(),
+            formatOnly = true, // no styling here, only text formatting
+            threadID = thread.threadId,
+            context = context
+        )
         binding.snippetTextView.typeface = if (unreadCount > 0 && !thread.isRead) Typeface.DEFAULT_BOLD else Typeface.DEFAULT
         binding.snippetTextView.visibility = if (isTyping) View.GONE else View.VISIBLE
         if (isTyping) {

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaRailAdapter.java

@@ -1,5 +1,7 @@
 package org.thoughtcrime.securesms.mediapreview;
 
+import static org.thoughtcrime.securesms.util.GeneralUtilitiesKt.toPx;
+
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.recyclerview.widget.RecyclerView;
@@ -151,6 +153,8 @@ public class MediaRailAdapter extends RecyclerView.Adapter<MediaRailAdapter.Medi
     {
       image.setImageResource(glideRequests, media.getUri());
       image.setOnClickListener(v -> railItemListener.onRailItemClicked(distanceFromActive));
+      // set the rounded corners
+      image.setRoundedCorners(toPx(5, image.getResources()));
 
       outline.setVisibility(isActive ? View.VISIBLE : View.GONE);
 

app/src/main/java/org/thoughtcrime/securesms/messagerequests/MessageRequestView.kt

@@ -39,7 +39,13 @@ class MessageRequestView : LinearLayout {
         binding.displayNameTextView.text = senderDisplayName
         binding.timestampTextView.text = DateUtils.getDisplayFormattedTimeSpanString(context, Locale.getDefault(), thread.date)
         val rawSnippet = thread.getDisplayBody(context)
-        val snippet = highlightMentions(rawSnippet, thread.threadId, context)
+        val snippet = highlightMentions(
+            text = rawSnippet,
+            formatOnly = true, // no styling here, only text formatting
+            threadID = thread.threadId,
+            context = context
+        )
+
         binding.snippetTextView.text = snippet
 
         post {

app/src/main/java/org/thoughtcrime/securesms/notifications/DefaultMessageNotifier.java

@@ -56,7 +56,6 @@ import org.session.libsignal.utilities.Util;
 import org.thoughtcrime.securesms.ApplicationContext;
 import org.thoughtcrime.securesms.contacts.ContactUtil;
 import org.thoughtcrime.securesms.conversation.v2.ConversationActivityV2;
-import org.thoughtcrime.securesms.conversation.v2.utilities.MentionManagerUtilities;
 import org.thoughtcrime.securesms.conversation.v2.utilities.MentionUtilities;
 import org.thoughtcrime.securesms.crypto.KeyPairUtilities;
 import org.thoughtcrime.securesms.database.LokiThreadDatabase;
@@ -348,7 +347,6 @@ public class DefaultMessageNotifier implements MessageNotifier {
 
     builder.setThread(notifications.get(0).getRecipient());
     builder.setMessageCount(notificationState.getMessageCount());
-    MentionManagerUtilities.INSTANCE.populateUserPublicKeyCacheIfNeeded(notifications.get(0).getThreadId(),context);
 
     // TODO: Removing highlighting mentions in the notification because this context is the libsession one which
     // TODO: doesn't have access to the `R.attr.message_sent_text_color` and `R.attr.message_received_text_color`
@@ -444,13 +442,30 @@ public class DefaultMessageNotifier implements MessageNotifier {
     while(iterator.hasPrevious()) {
       NotificationItem item = iterator.previous();
       builder.addMessageBody(item.getIndividualRecipient(), item.getRecipient(),
-                             MentionUtilities.highlightMentions(item.getText(), item.getThreadId(), context));
+              MentionUtilities.highlightMentions(
+                      item.getText() != null ? item.getText() : "",
+                      false,
+                      false,
+                      true, // no styling here, only text formatting
+                      item.getThreadId(),
+                      context
+              )
+      );
     }
 
     if (signal) {
       builder.setAlarms(notificationState.getRingtone(context), notificationState.getVibrate());
+      CharSequence text = notifications.get(0).getText();
       builder.setTicker(notifications.get(0).getIndividualRecipient(),
-                        MentionUtilities.highlightMentions(notifications.get(0).getText(), notifications.get(0).getThreadId(), context));
+              MentionUtilities.highlightMentions(
+                      text != null ? text : "",
+                      false,
+                      false,
+                      true, // no styling here, only text formatting
+                      notifications.get(0).getThreadId(),
+                      context
+              )
+      );
     }
 
     builder.putStringExtra(LATEST_MESSAGE_ID_TAG, messageIdTag);

app/src/main/java/org/thoughtcrime/securesms/preferences/ClearAllDataDialog.kt

@@ -4,12 +4,13 @@ import android.app.Dialog
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
-import androidx.core.view.isGone
+import android.widget.Toast
 import androidx.core.view.isVisible
 import androidx.fragment.app.DialogFragment
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.DividerItemDecoration
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Dispatchers.Main
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -24,17 +25,26 @@ import org.thoughtcrime.securesms.dependencies.DatabaseComponent
 import org.thoughtcrime.securesms.util.ConfigurationMessageUtilities
 
 class ClearAllDataDialog : DialogFragment() {
+    private val TAG = "ClearAllDataDialog"
+
     private lateinit var binding: DialogClearAllDataBinding
 
-    enum class Steps {
+    private enum class Steps {
         INFO_PROMPT,
         NETWORK_PROMPT,
-        DELETING
+        DELETING,
+        RETRY_LOCAL_DELETE_ONLY_PROMPT
     }
 
-    var clearJob: Job? = null
+    // Rather than passing a bool around we'll use an enum to clarify our intent
+    private enum class DeletionScope {
+        DeleteLocalDataOnly,
+        DeleteBothLocalAndNetworkData
+    }
 
-    var step = Steps.INFO_PROMPT
+    private var clearJob: Job? = null
+
+    private var step = Steps.INFO_PROMPT
         set(value) {
             field = value
             updateUI()
@@ -46,8 +56,8 @@ class ClearAllDataDialog : DialogFragment() {
 
     private fun createView(): View {
         binding = DialogClearAllDataBinding.inflate(LayoutInflater.from(requireContext()))
-        val device = radioOption("deviceOnly", R.string.dialog_clear_all_data_clear_device_only)
-        val network = radioOption("deviceAndNetwork", R.string.dialog_clear_all_data_clear_device_and_network)
+        val device = radioOption("deviceOnly", R.string.clearDeviceOnly)
+        val network = radioOption("deviceAndNetwork", R.string.clearDeviceAndNetwork)
         var selectedOption: RadioOption<String> = device
         val optionAdapter = RadioOptionAdapter { selectedOption = it }
         binding.recyclerView.apply {
@@ -57,18 +67,21 @@ class ClearAllDataDialog : DialogFragment() {
             setHasFixedSize(true)
         }
         optionAdapter.submitList(listOf(device, network))
+
         binding.cancelButton.setOnClickListener {
             dismiss()
         }
+
         binding.clearAllDataButton.setOnClickListener {
-            when(step) {
+            when (step) {
                 Steps.INFO_PROMPT -> if (selectedOption == network) {
                     step = Steps.NETWORK_PROMPT
                 } else {
-                    clearAllData(false)
+                    clearAllData(DeletionScope.DeleteLocalDataOnly)
                 }
-                Steps.NETWORK_PROMPT -> clearAllData(true)
+                Steps.NETWORK_PROMPT -> clearAllData(DeletionScope.DeleteBothLocalAndNetworkData)
                 Steps.DELETING -> { /* do nothing intentionally */ }
+                Steps.RETRY_LOCAL_DELETE_ONLY_PROMPT -> clearAllData(DeletionScope.DeleteLocalDataOnly)
             }
         }
         return binding.root
@@ -86,8 +99,13 @@ class ClearAllDataDialog : DialogFragment() {
                     binding.dialogDescriptionText.setText(R.string.dialog_clear_all_data_clear_device_and_network_confirmation)
                 }
                 Steps.DELETING -> { /* do nothing intentionally */ }
+                Steps.RETRY_LOCAL_DELETE_ONLY_PROMPT -> {
+                    binding.dialogDescriptionText.setText(R.string.clearDataErrorDescriptionGeneric)
+                    binding.clearAllDataButton.text = getString(R.string.clearDevice)
                 }
-            binding.recyclerView.isGone = step == Steps.NETWORK_PROMPT
+            }
+
+            binding.recyclerView.isVisible = step == Steps.INFO_PROMPT
             binding.cancelButton.isVisible = !isLoading
             binding.clearAllDataButton.isVisible = !isLoading
             binding.progressBar.isVisible = isLoading
@@ -97,45 +115,55 @@ class ClearAllDataDialog : DialogFragment() {
         }
     }
 
-    private fun clearAllData(deleteNetworkMessages: Boolean) {
-        clearJob = lifecycleScope.launch(Dispatchers.IO) {
-            val previousStep = step
-            withContext(Dispatchers.Main) {
-                step = Steps.DELETING
-            }
-
-            if (!deleteNetworkMessages) {
+    private suspend fun performDeleteLocalDataOnlyStep() {
         try {
             ConfigurationMessageUtilities.forceSyncConfigurationNowIfNeeded(requireContext()).get()
         } catch (e: Exception) {
-                    Log.e("Loki", "Failed to force sync", e)
+            Log.e(TAG, "Failed to force sync when deleting data", e)
+            withContext(Main) {
+                Toast.makeText(ApplicationContext.getInstance(requireContext()), R.string.errorUnknown, Toast.LENGTH_LONG).show()
             }
-                ApplicationContext.getInstance(context).clearAllData()
-                withContext(Dispatchers.Main) {
+            return
+        }
+        ApplicationContext.getInstance(context).clearAllData().let { success ->
+            withContext(Main) {
+                if (success) {
                     dismiss()
-                }
                 } else {
-                // finish
-                val result = try {
+                    Toast.makeText(ApplicationContext.getInstance(requireContext()), R.string.errorUnknown, Toast.LENGTH_LONG).show()
+                }
+            }
+        }
+    }
+
+    private fun clearAllData(deletionScope: DeletionScope) {
+        step = Steps.DELETING
+
+        clearJob = lifecycleScope.launch(Dispatchers.IO) {
+            when (deletionScope) {
+                DeletionScope.DeleteLocalDataOnly -> {
+                    performDeleteLocalDataOnlyStep()
+                }
+                DeletionScope.DeleteBothLocalAndNetworkData -> {
+                    val deletionResultMap: Map<String, Boolean>? = try {
                         val openGroups = DatabaseComponent.get(requireContext()).lokiThreadDatabase().getAllOpenGroups()
                         openGroups.map { it.value.server }.toSet().forEach { server ->
                             OpenGroupApi.deleteAllInboxMessages(server).get()
                         }
                         SnodeAPI.deleteAllMessages().get()
                     } catch (e: Exception) {
+                        Log.e(TAG, "Failed to delete network messages - offering user option to delete local data only.", e)
                         null
                     }
 
-                if (result == null || result.values.any { !it } || result.isEmpty()) {
-                    // didn't succeed (at least one)
-                    withContext(Dispatchers.Main) {
-                        step = previousStep
+                    // If one or more deletions failed then inform the user and allow them to clear the device only if they wish..
+                    if (deletionResultMap == null || deletionResultMap.values.any { !it } || deletionResultMap.isEmpty()) {
+                        withContext(Main) { step = Steps.RETRY_LOCAL_DELETE_ONLY_PROMPT }
                     }
-                } else if (result.values.all { it }) {
-                    // don't force sync because all the messages are deleted?
+                    else if (deletionResultMap.values.all { it }) {
+                        // ..otherwise if the network data deletion was successful proceed to delete the local data as well.
                         ApplicationContext.getInstance(context).clearAllData()
-                    withContext(Dispatchers.Main) {
-                        dismiss()
+                        withContext(Main) { dismiss() }
                     }
                 }
             }

app/src/main/java/org/thoughtcrime/securesms/util/FlowUtils.kt

@@ -0,0 +1,44 @@
+package org.thoughtcrime.securesms.util
+
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.asFlow
+import kotlinx.coroutines.flow.channelFlow
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.flatMapConcat
+
+/**
+ * Buffers items from the flow and emits them in batches. The batch will have size [maxItems] and
+ * time [timeoutMillis] limit.
+ */
+fun <T> Flow<T>.timedBuffer(timeoutMillis: Long, maxItems: Int): Flow<List<T>> {
+    return channelFlow {
+        val buffer = mutableListOf<T>()
+        var bufferBeganAt = -1L
+
+        collectLatest { value ->
+            if (buffer.isEmpty()) {
+                bufferBeganAt = System.currentTimeMillis()
+            }
+
+            buffer.add(value)
+
+            if (buffer.size < maxItems) {
+                // If the buffer is not full, wait until the time limit is reached.
+                // The delay here, as a suspension point, will be cancelled by `collectLatest`,
+                // if another item is collected while we are waiting for the `delay` to complete.
+                // Once the delay is cancelled, another round of `collectLatest` will be restarted.
+                delay((System.currentTimeMillis() + timeoutMillis - bufferBeganAt).coerceAtLeast(0L))
+            }
+
+            // When we reach here, it's either the buffer is full, or the timeout has been reached:
+            // send out the buffer and reset the state
+            send(buffer.toList())
+            buffer.clear()
+        }
+    }
+}
+
+@OptIn(ExperimentalCoroutinesApi::class)
+fun <T> Flow<Iterable<T>>.flatten(): Flow<T> = flatMapConcat { it.asFlow() }

app/src/main/java/org/thoughtcrime/securesms/util/RoundedBackgroundSpan.kt

@@ -0,0 +1,61 @@
+package org.thoughtcrime.securesms.util
+
+import android.content.Context
+import android.content.res.Resources
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.RectF
+import android.text.style.ReplacementSpan
+
+/**
+ * A Span that draws text with a rounded background.
+ *
+ * @param textColor - The color of the text.
+ * @param backgroundColor - The color of the background.
+ * @param cornerRadius - The corner radius of the background in pixels. Defaults to 8dp.
+ * @param paddingHorizontal - The horizontal padding of the text in pixels. Defaults to 3dp.
+ * @param paddingVertical - The vertical padding of the text in pixels. Defaults to 3dp.
+ */
+
+
+class RoundedBackgroundSpan(
+    context: Context,
+    private val textColor: Int,
+    private val backgroundColor: Int,
+    private val cornerRadius: Float = toPx(8, context.resources).toFloat(), // setting some Session defaults
+    private val paddingHorizontal: Float = toPx(3, context.resources).toFloat(),
+    private val paddingVertical: Float = toPx(3, context.resources).toFloat()
+) : ReplacementSpan() {
+
+    override fun draw(
+        canvas: Canvas, text: CharSequence, start: Int, end: Int,
+        x: Float, top: Int, y: Int, bottom: Int, paint: Paint
+    ) {
+        // the top needs to take into account the font and the required vertical padding
+        val newTop = y + paint.fontMetrics.ascent - paddingVertical
+        val newBottom = y + paint.fontMetrics.descent + paddingVertical
+        val rect = RectF(
+            x,
+            newTop,
+            x + measureText(paint, text, start, end) + 2 * paddingHorizontal,
+            newBottom
+        )
+        paint.color = backgroundColor
+
+        canvas.drawRoundRect(rect, cornerRadius, cornerRadius, paint)
+        paint.color = textColor
+        canvas.drawText(text, start, end, x + paddingHorizontal, y.toFloat(), paint)
+    }
+
+    override fun getSize(
+        paint: Paint, text: CharSequence?, start: Int, end: Int, fm: Paint.FontMetricsInt?
+    ): Int {
+        return (paint.measureText(text, start, end) + 2 * paddingHorizontal).toInt()
+    }
+
+    private fun measureText(
+        paint: Paint, text: CharSequence, start: Int, end: Int
+    ): Float {
+        return paint.measureText(text, start, end)
+    }
+}

app/src/main/res/layout/activity_conversation_v2.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
+<androidx.constraintlayout.widget.ConstraintLayout
     android:focusable="false"
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
@@ -13,6 +13,9 @@
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toTopOf="@+id/conversationRecyclerView"
+        app:layout_constraintStart_toStartOf="parent"
         android:background="?colorPrimary"
         app:contentInsetStart="0dp">
 
@@ -31,9 +34,11 @@
         android:focusable="false"
         android:id="@+id/conversationRecyclerView"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_above="@+id/typingIndicatorViewContainer"
-        android:layout_below="@id/toolbar" />
+        android:layout_height="0dp"
+        app:layout_constraintVertical_weight="1"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintBottom_toTopOf="@+id/typingIndicatorViewContainer"
+        app:layout_constraintTop_toBottomOf="@id/toolbar" />
 
 
     <org.thoughtcrime.securesms.conversation.v2.components.TypingIndicatorViewContainer
@@ -42,20 +47,27 @@
         android:layout_width="match_parent"
         android:layout_height="36dp"
         android:visibility="gone"
-        android:layout_above="@+id/textSendAfterApproval"
+        tools:visibility="visible"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/conversationRecyclerView"
+        app:layout_constraintBottom_toTopOf="@+id/textSendAfterApproval"
         />
 
     <org.thoughtcrime.securesms.conversation.v2.input_bar.InputBar
         android:id="@+id/inputBar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignParentBottom="true" />
+        tools:layout_height="60dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/messageRequestBar"
+        app:layout_constraintBottom_toBottomOf="parent"
+        />
 
     <org.thoughtcrime.securesms.conversation.v2.search.SearchBottomBar
         android:id="@+id/searchBottomBar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignParentBottom="true"
+        app:layout_constraintBottom_toBottomOf="parent"
         android:visibility="gone"/>
 
     <FrameLayout
@@ -75,11 +87,18 @@
         android:inflatedId="@+id/conversation_reaction_scrubber"
         android:layout="@layout/conversation_reaction_scrubber"/>
 
-    <FrameLayout
-        android:id="@+id/additionalContentContainer"
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/conversation_mention_candidates"
+        android:clipToOutline="true"
+        android:contentDescription="@string/AccessibilityId_mentions_list"
+        tools:listitem="@layout/view_mention_candidate_v2"
+        android:background="@drawable/mention_candidate_view_background"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignBottom="@+id/conversationRecyclerView"/>
+        tools:visibility="gone"
+        app:layout_constraintHeight_max="176dp"
+        app:layout_constraintBottom_toBottomOf="@+id/conversationRecyclerView" />
 
     <LinearLayout
         android:id="@+id/attachmentOptionsContainer"
@@ -87,19 +106,19 @@
         android:layout_height="wrap_content"
         android:layout_marginStart="@dimen/small_spacing"
         android:elevation="8dp"
-        android:layout_alignParentStart="true"
-        android:layout_alignParentBottom="true"
-        android:layout_marginBottom="60dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintBottom_toTopOf="@+id/inputBar"
+        android:layout_marginBottom="16dp"
         android:orientation="vertical">
 
-        <RelativeLayout
+        <FrameLayout
             android:id="@+id/gifButtonContainer"
             android:layout_width="@dimen/input_bar_button_expanded_size"
             android:layout_height="@dimen/input_bar_button_expanded_size"
             android:contentDescription="@string/AccessibilityId_gif_button"
             android:alpha="0" />
 
-        <RelativeLayout
+        <FrameLayout
             android:id="@+id/documentButtonContainer"
             android:layout_marginTop="8dp"
             android:layout_width="@dimen/input_bar_button_expanded_size"
@@ -107,7 +126,7 @@
             android:contentDescription="@string/AccessibilityId_documents_folder"
             android:alpha="0" />
 
-        <RelativeLayout
+        <FrameLayout
             android:id="@+id/libraryButtonContainer"
             android:layout_marginTop="8dp"
             android:layout_width="@dimen/input_bar_button_expanded_size"
@@ -115,7 +134,7 @@
             android:contentDescription="@string/AccessibilityId_images_folder"
             android:alpha="0" />
 
-        <RelativeLayout
+        <FrameLayout
             android:id="@+id/cameraButtonContainer"
             android:layout_marginTop="8dp"
             android:layout_width="@dimen/input_bar_button_expanded_size"
@@ -129,22 +148,26 @@
         android:id="@+id/textSendAfterApproval"
         android:text="@string/ConversationActivity_send_after_approval"
         android:visibility="gone"
+        tools:visibility="visible"
         android:textAlignment="center"
         android:textColor="@color/classic_light_2"
         android:padding="22dp"
         android:textSize="12sp"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignWithParentIfMissing="true"
-        android:layout_above="@id/messageRequestBar"/>
+        tools:text="You'll be able to send"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/typingIndicatorViewContainer"
+        app:layout_constraintBottom_toTopOf="@+id/messageRequestBar" />
 
     <RelativeLayout
         android:id="@+id/scrollToBottomButton"
+        tools:visibility="visible"
         android:visibility="gone"
         android:layout_width="40dp"
         android:layout_height="50dp"
-        android:layout_alignParentEnd="true"
-        android:layout_above="@+id/messageRequestBar"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toTopOf="@+id/messageRequestBar"
         android:layout_alignWithParentIfMissing="true"
         android:layout_marginEnd="12dp"
         android:layout_marginBottom="32dp">
@@ -197,14 +220,14 @@
         android:layout_height="wrap_content"
         android:layout_marginBottom="-12dp"
         android:visibility="gone"
-        android:layout_alignParentBottom="true" />
+        app:layout_constraintBottom_toBottomOf="parent" />
 
-    <RelativeLayout
+    <FrameLayout
         android:id="@+id/blockedBanner"
         android:contentDescription="@string/AccessibilityId_blocked_banner"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_below="@+id/toolbar"
+        app:layout_constraintTop_toBottomOf="@+id/toolbar"
         android:background="@color/destructive"
         android:visibility="gone"
         tools:visibility="visible">
@@ -214,20 +237,20 @@
             android:contentDescription="@string/AccessibilityId_blocked_banner_text"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_centerInParent="true"
+            android:layout_gravity="center"
             android:layout_margin="@dimen/medium_spacing"
             android:textColor="@color/white"
             android:textSize="@dimen/small_font_size"
             android:textStyle="bold"
             tools:text="Elon is blocked. Unblock them?" />
 
-    </RelativeLayout>
+    </FrameLayout>
 
-    <RelativeLayout
+    <FrameLayout
         android:id="@+id/outdatedBanner"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_below="@+id/blockedBanner"
+        app:layout_constraintTop_toBottomOf="@+id/blockedBanner"
         android:background="@color/outdated_client_banner_background_color"
         android:visibility="gone"
         tools:visibility="visible">
@@ -237,14 +260,14 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:gravity="center_horizontal"
-            android:layout_centerInParent="true"
+            android:layout_gravity="center"
             android:layout_marginVertical="@dimen/very_small_spacing"
             android:layout_marginHorizontal="@dimen/medium_spacing"
             android:textColor="@color/black"
             android:textSize="@dimen/tiny_font_size"
             tools:text="This user's client is outdated, things may not work as expected" />
 
-    </RelativeLayout>
+    </FrameLayout>
 
     <TextView
         android:padding="@dimen/medium_spacing"
@@ -254,7 +277,7 @@
         android:id="@+id/placeholderText"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_below="@+id/blockedBanner"
+        app:layout_constraintTop_toBottomOf="@+id/outdatedBanner"
         android:elevation="8dp"
         android:contentDescription="@string/AccessibilityId_control_message"
         tools:text="@string/activity_conversation_empty_state_default"
@@ -264,11 +287,12 @@
         android:id="@+id/messageRequestBar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_above="@id/inputBar"
+        app:layout_constraintBottom_toTopOf="@+id/inputBar"
+        app:layout_constraintTop_toBottomOf="@+id/textSendAfterApproval"
         android:layout_marginBottom="@dimen/large_spacing"
         android:orientation="vertical"
         android:visibility="gone"
-        tools:visibility="visible">
+        tools:visibility="gone">
 
         <TextView
             android:id="@+id/messageRequestBlock"
@@ -322,4 +346,4 @@
 
     </LinearLayout>
 
-</RelativeLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/album_thumbnail_1.xml

@@ -9,11 +9,6 @@
     <include layout="@layout/thumbnail_view"
         android:id="@+id/album_cell_1"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        app:minWidth="@dimen/media_bubble_min_width"
-        app:maxWidth="@dimen/media_bubble_max_width"
-        app:minHeight="@dimen/media_bubble_min_height"
-        app:maxHeight="@dimen/media_bubble_max_height"
-        app:thumbnail_radius="1dp"/>
+        android:layout_height="match_parent"/>
 
 </FrameLayout>

app/src/main/res/layout/album_thumbnail_2.xml

@@ -10,14 +10,12 @@
     <include layout="@layout/thumbnail_view"
         android:id="@+id/album_cell_1"
         android:layout_width="@dimen/album_2_cell_width"
-        android:layout_height="@dimen/album_2_total_height"
-        app:thumbnail_radius="0dp"/>
+        android:layout_height="@dimen/album_2_total_height"/>
 
     <include layout="@layout/thumbnail_view"
         android:id="@+id/album_cell_2"
         android:layout_width="@dimen/album_2_cell_width"
         android:layout_height="@dimen/album_2_total_height"
-        android:layout_gravity="end"
-        app:thumbnail_radius="0dp"/>
+        android:layout_gravity="end"/>
 
 </FrameLayout>

app/src/main/res/layout/album_thumbnail_3.xml

@@ -9,15 +9,13 @@
     <include layout="@layout/thumbnail_view"
         android:id="@+id/album_cell_1"
         android:layout_width="@dimen/album_3_cell_width_big"
-        android:layout_height="@dimen/album_3_total_height"
-        app:thumbnail_radius="0dp"/>
+        android:layout_height="@dimen/album_3_total_height"/>
 
     <include layout="@layout/thumbnail_view"
         android:id="@+id/album_cell_2"
         android:layout_width="@dimen/album_3_cell_size_small"
         android:layout_height="@dimen/album_3_cell_size_small"
-        android:layout_gravity="end|top"
-        app:thumbnail_radius="0dp"/>
+        android:layout_gravity="end|top"/>
 
 
     <FrameLayout
@@ -29,8 +27,7 @@
             android:id="@+id/album_cell_3"
             android:layout_height="match_parent"
             android:layout_width="match_parent"
-            android:layout_gravity="center_horizontal|bottom"
-            app:thumbnail_radius="0dp"/>
+            android:layout_gravity="center_horizontal|bottom"/>
 
         <TextView
             tools:visibility="visible"

app/src/main/res/layout/mediarail_media_item.xml

@@ -12,9 +12,7 @@
         android:id="@+id/rail_item_image"
         android:layout_width="56dp"
         android:layout_height="56dp"
-        android:layout_gravity="center"
-        android:background="@drawable/mediarail_media_outline"
-        app:thumbnail_radius="5dp"/>
+        android:layout_gravity="center"/>
 
     <ImageView
         android:id="@+id/rail_item_outline"

app/src/main/res/layout/view_mention_candidate_v2.xml

@@ -1,9 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="44dp"
-    android:background="@drawable/mention_candidate_view_background">
+    xmlns:tools="http://schemas.android.com/tools">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -42,6 +41,7 @@
             android:textSize="@dimen/small_font_size"
             android:textColor="?android:textColorPrimary"
             android:maxLines="1"
+            tools:text="Alice"
             android:contentDescription="@string/AccessibilityId_contact_mentions"
             android:ellipsize="end" />
 

app/src/main/res/values-fa-rIR/strings.xml

@@ -646,8 +646,6 @@
     <string name="dialog_clear_all_data_explanation">این گزینه به طور دائم پیام‌ها، جلسات و مخاطبین شما را حذف می‌کند.</string>
     <string name="dialog_clear_all_data_network_explanation">آیا فقط می‌خواهید این دستگاه را پاک کنید یا می‌خواهید کل اکانت را پاک کنید؟</string>
     <string name="dialog_clear_all_data_message">این کار پیام‌ها و مخاطبین شما را برای همیشه حذف می‌کند. آیا می‌خواهید فقط این دستگاه را پاک کنید یا داتا خود را از شبکه نیز حذف کنید?</string>
-    <string name="dialog_clear_all_data_clear_device_only">فقط پاک کردن دستگاه</string>
-    <string name="dialog_clear_all_data_clear_device_and_network">پاک کردن دستگاه و شبکه</string>
     <string name="dialog_clear_all_data_clear_device_and_network_confirmation">آیا مطمئن هستید که می خواهید داتا های خود را از شبکه حذف کنید؟ اگر ادامه دهید، نمی‌توانید پیام‌ها یا مخاطبین خود را بازیابی کنید.</string>
     <string name="dialog_clear_all_data_clear">پاک</string>
     <string name="dialog_clear_all_data_local_only">فقط حذف شود</string>

app/src/main/res/values-fr-rFR/strings.xml

@@ -649,8 +649,6 @@
     <string name="dialog_clear_all_data_explanation">Cela supprimera définitivement vos messages, vos sessions et vos contacts.</string>
     <string name="dialog_clear_all_data_network_explanation">Souhaitez-vous effacer seulement cet appareil ou supprimer l\'ensemble de votre compte ?</string>
     <string name="dialog_clear_all_data_message">Cela supprimera définitivement vos messages, sessions et contacts. Voulez-vous uniquement effacer cet appareil ou supprimer l\'intégralité de votre compte ?</string>
-    <string name="dialog_clear_all_data_clear_device_only">Effacer l\'appareil uniquement</string>
-    <string name="dialog_clear_all_data_clear_device_and_network">Effacer l\'appareil et le réseau</string>
     <string name="dialog_clear_all_data_clear_device_and_network_confirmation">Êtes-vous sûr de vouloir supprimer vos données du réseau ? Si vous continuez, vous ne pourrez pas restaurer vos messages ou vos contacts.</string>
     <string name="dialog_clear_all_data_clear">Effacer</string>
     <string name="dialog_clear_all_data_local_only">Effacer seulement</string>

app/src/main/res/values-fr/strings.xml

@@ -649,8 +649,6 @@
     <string name="dialog_clear_all_data_explanation">Cela supprimera définitivement vos messages, vos sessions et vos contacts.</string>
     <string name="dialog_clear_all_data_network_explanation">Souhaitez-vous effacer seulement cet appareil ou supprimer l\'ensemble de votre compte ?</string>
     <string name="dialog_clear_all_data_message">Cela supprimera définitivement vos messages, sessions et contacts. Voulez-vous uniquement effacer cet appareil ou supprimer l\'intégralité de votre compte ?</string>
-    <string name="dialog_clear_all_data_clear_device_only">Effacer l\'appareil uniquement</string>
-    <string name="dialog_clear_all_data_clear_device_and_network">Effacer l\'appareil et le réseau</string>
     <string name="dialog_clear_all_data_clear_device_and_network_confirmation">Êtes-vous sûr de vouloir supprimer vos données du réseau ? Si vous continuez, vous ne pourrez pas restaurer vos messages ou vos contacts.</string>
     <string name="dialog_clear_all_data_clear">Effacer</string>
     <string name="dialog_clear_all_data_local_only">Effacer seulement</string>

app/src/main/res/values/strings.xml

@@ -822,8 +822,6 @@
     <string name="dialog_clear_all_data_explanation">This will permanently delete your messages, sessions, and contacts.</string>
     <string name="dialog_clear_all_data_network_explanation">Would you like to clear only this device, or delete your entire account?</string>
     <string name="dialog_clear_all_data_message">This will permanently delete your messages, sessions, and contacts. Would you like to clear only this device, or delete your entire account?</string>
-    <string name="dialog_clear_all_data_clear_device_only">Clear Device Only</string>
-    <string name="dialog_clear_all_data_clear_device_and_network">Clear Device and Network</string>
     <string name="dialog_clear_all_data_clear_device_and_network_confirmation">Are you sure you want to delete your data from the network? If you continue you will not be able to restore your messages or contacts.</string>
     <string name="dialog_clear_all_data_clear">Clear</string>
     <string name="dialog_clear_all_data_local_only">Delete Only</string>

app/src/test/java/org/thoughtcrime/securesms/conversation/v2/ConversationViewModelTest.kt

@@ -23,6 +23,7 @@ import org.session.libsession.utilities.recipients.Recipient
 import org.session.libsignal.utilities.Log
 import org.thoughtcrime.securesms.BaseViewModelTest
 import org.thoughtcrime.securesms.NoOpLogger
+import org.thoughtcrime.securesms.database.MmsDatabase
 import org.thoughtcrime.securesms.database.Storage
 import org.thoughtcrime.securesms.database.model.MessageRecord
 import org.thoughtcrime.securesms.repository.ConversationRepository
@@ -32,6 +33,7 @@ class ConversationViewModelTest: BaseViewModelTest() {
 
     private val repository = mock<ConversationRepository>()
     private val storage = mock<Storage>()
+    private val mmsDatabase = mock<MmsDatabase>()
 
     private val threadId = 123L
     private val edKeyPair = mock<KeyPair>()
@@ -39,7 +41,7 @@ class ConversationViewModelTest: BaseViewModelTest() {
     private lateinit var messageRecord: MessageRecord
 
     private val viewModel: ConversationViewModel by lazy {
-        ConversationViewModel(threadId, edKeyPair, repository, storage)
+        ConversationViewModel(threadId, edKeyPair, repository, storage, mock(), mmsDatabase)
     }
 
     @Before

app/src/test/java/org/thoughtcrime/securesms/conversation/v2/MentionEditableTest.kt

@@ -0,0 +1,115 @@
+package org.thoughtcrime.securesms.conversation.v2
+
+import android.text.Editable
+import android.text.Selection
+import app.cash.turbine.test
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.thoughtcrime.securesms.conversation.v2.mention.MentionEditable
+import org.thoughtcrime.securesms.conversation.v2.mention.MentionViewModel
+
+@RunWith(RobolectricTestRunner::class)
+class MentionEditableTest {
+    private lateinit var mentionEditable: MentionEditable
+
+    @Before
+    fun setUp() {
+        mentionEditable = MentionEditable()
+    }
+
+    @Test
+    fun `should not have query when there is no 'at' symbol`() = runTest {
+        mentionEditable.observeMentionSearchQuery().test {
+            assertThat(awaitItem()).isNull()
+            mentionEditable.simulateTyping("Some text")
+            expectNoEvents()
+        }
+    }
+
+    @Test
+    fun `should have empty query after typing 'at' symbol`() = runTest {
+        mentionEditable.observeMentionSearchQuery().test {
+            assertThat(awaitItem()).isNull()
+
+            mentionEditable.simulateTyping("Some text")
+            expectNoEvents()
+
+            mentionEditable.simulateTyping("@")
+            assertThat(awaitItem())
+                .isEqualTo(MentionEditable.SearchQuery(9, ""))
+        }
+    }
+
+    @Test
+    fun `should have some query after typing words following 'at' symbol`() = runTest {
+        mentionEditable.observeMentionSearchQuery().test {
+            assertThat(awaitItem()).isNull()
+
+            mentionEditable.simulateTyping("Some text")
+            expectNoEvents()
+
+            mentionEditable.simulateTyping("@words")
+            assertThat(awaitItem())
+                .isEqualTo(MentionEditable.SearchQuery(9, "words"))
+        }
+    }
+
+    @Test
+    fun `should cancel query after a whitespace or another 'at' is typed`() = runTest {
+        mentionEditable.observeMentionSearchQuery().test {
+            assertThat(awaitItem()).isNull()
+
+            mentionEditable.simulateTyping("@words")
+            assertThat(awaitItem())
+                .isEqualTo(MentionEditable.SearchQuery(0, "words"))
+
+            mentionEditable.simulateTyping(" ")
+            assertThat(awaitItem())
+                .isNull()
+
+            mentionEditable.simulateTyping("@query@")
+            assertThat(awaitItem())
+                .isEqualTo(MentionEditable.SearchQuery(13, ""))
+        }
+    }
+
+    @Test
+    fun `should move pass the whole span while moving cursor around mentioned block `() {
+        mentionEditable.append("Mention @user here")
+        mentionEditable.addMention(MentionViewModel.Member("user", "User", false), 8..14)
+
+        // Put cursor right before @user, it should then select nothing
+        Selection.setSelection(mentionEditable, 8)
+        assertThat(mentionEditable.selection()).isEqualTo(intArrayOf(8, 8))
+
+        // Put cursor right after '@', it should then select the whole @user
+        Selection.setSelection(mentionEditable, 9)
+        assertThat(mentionEditable.selection()).isEqualTo(intArrayOf(8, 13))
+
+        // Put cursor right after @user, it should then select nothing
+        Selection.setSelection(mentionEditable, 13)
+        assertThat(mentionEditable.selection()).isEqualTo(intArrayOf(13, 13))
+    }
+
+    @Test
+    fun `should delete the whole mention block while deleting only part of it`() {
+        mentionEditable.append("Mention @user here")
+        mentionEditable.addMention(MentionViewModel.Member("user", "User", false), 8..14)
+
+        mentionEditable.delete(8, 9)
+        assertThat(mentionEditable.toString()).isEqualTo("Mention  here")
+    }
+}
+
+private fun CharSequence.selection(): IntArray {
+    return intArrayOf(Selection.getSelectionStart(this), Selection.getSelectionEnd(this))
+}
+
+private fun Editable.simulateTyping(text: String) {
+    this.append(text)
+    Selection.setSelection(this, this.length)
+}

app/src/test/java/org/thoughtcrime/securesms/conversation/v2/MentionViewModelTest.kt

@@ -0,0 +1,184 @@
+package org.thoughtcrime.securesms.conversation.v2
+
+import android.text.Selection
+import app.cash.turbine.test
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.kotlin.any
+import org.mockito.kotlin.doAnswer
+import org.mockito.kotlin.doReturn
+import org.mockito.kotlin.eq
+import org.mockito.kotlin.mock
+import org.robolectric.RobolectricTestRunner
+import org.session.libsession.messaging.contacts.Contact
+import org.session.libsession.messaging.open_groups.GroupMemberRole
+import org.session.libsession.messaging.open_groups.OpenGroup
+import org.session.libsession.utilities.recipients.Recipient
+import org.thoughtcrime.securesms.MainCoroutineRule
+import org.thoughtcrime.securesms.conversation.v2.mention.MentionViewModel
+
+@RunWith(RobolectricTestRunner::class)
+class MentionViewModelTest {
+    @OptIn(ExperimentalCoroutinesApi::class)
+    @get:Rule
+    val mainCoroutineRule = MainCoroutineRule()
+
+    private lateinit var mentionViewModel: MentionViewModel
+
+    private val threadID = 123L
+
+    private data class MemberInfo(
+        val name: String,
+        val pubKey: String,
+        val roles: List<GroupMemberRole>
+    )
+
+    private val threadMembers = listOf(
+        MemberInfo("Alice", "pubkey1", listOf(GroupMemberRole.ADMIN)),
+        MemberInfo("Bob", "pubkey2", listOf(GroupMemberRole.STANDARD)),
+        MemberInfo("Charlie", "pubkey3", listOf(GroupMemberRole.MODERATOR)),
+        MemberInfo("David", "pubkey4", listOf(GroupMemberRole.HIDDEN_ADMIN)),
+        MemberInfo("Eve", "pubkey5", listOf(GroupMemberRole.HIDDEN_MODERATOR)),
+        MemberInfo("李云海", "pubkey6", listOf(GroupMemberRole.ZOOMBIE)),
+    )
+
+    private val memberContacts = threadMembers.map { m ->
+        Contact(m.pubKey).also {
+            it.name = m.name
+        }
+    }
+
+    private val openGroup = OpenGroup(
+        server = "",
+        room = "",
+        id = "open_group_id_1",
+        name = "Open Group",
+        publicKey = "",
+        imageId = null,
+        infoUpdates = 0,
+        canWrite = true
+    )
+
+    @Before
+    fun setUp() {
+        @Suppress("UNCHECKED_CAST")
+        mentionViewModel = MentionViewModel(
+            threadID,
+            contentResolver = mock { },
+            threadDatabase = mock {
+                on { getRecipientForThreadId(threadID) } doAnswer {
+                    mock<Recipient> {
+                        on { isClosedGroupRecipient } doReturn false
+                        on { isCommunityRecipient } doReturn true
+                        on { isContactRecipient } doReturn false
+                    }
+                }
+            },
+            groupDatabase = mock {
+            },
+            mmsDatabase = mock {
+                on { getRecentChatMemberIDs(eq(threadID), any()) } doAnswer {
+                    val limit = it.arguments[1] as Int
+                    threadMembers.take(limit).map { m -> m.pubKey }
+                }
+            },
+            contactDatabase = mock {
+                on { getContacts(any()) } doAnswer {
+                    val ids = it.arguments[0] as Collection<String>
+                    memberContacts.filter { contact -> contact.accountID in ids }
+                }
+            },
+            memberDatabase = mock {
+                on { getGroupMembersRoles(eq(openGroup.id), any()) } doAnswer {
+                    val memberIDs = it.arguments[1] as Collection<String>
+                    memberIDs.associateWith { id ->
+                        threadMembers.first { m -> m.pubKey == id }.roles
+                    }
+                }
+            },
+            storage = mock {
+                on { getOpenGroup(threadID) } doReturn openGroup
+            },
+            dispatcher = StandardTestDispatcher()
+        )
+    }
+
+    @Test
+    fun `should show candidates after 'at' symbol`() = runTest {
+        mentionViewModel.autoCompleteState.test {
+            assertThat(awaitItem())
+                .isEqualTo(MentionViewModel.AutoCompleteState.Idle)
+
+            val editable = mentionViewModel.editableFactory.newEditable("")
+            editable.append("Hello @")
+            expectNoEvents() // Nothing should happen before cursor is put after @
+            Selection.setSelection(editable, editable.length)
+
+            assertThat(awaitItem())
+                .isEqualTo(MentionViewModel.AutoCompleteState.Loading)
+
+            // Should show all the candidates
+            awaitItem().let { result ->
+                assertThat(result)
+                    .isInstanceOf(MentionViewModel.AutoCompleteState.Result::class.java)
+                result as MentionViewModel.AutoCompleteState.Result
+
+                assertThat(result.members).isEqualTo(threadMembers.mapIndexed { index, m ->
+                    val name =
+                        memberContacts[index].displayName(Contact.ContactContext.OPEN_GROUP).orEmpty()
+
+                    MentionViewModel.Candidate(
+                        MentionViewModel.Member(m.pubKey, name, m.roles.any { it.isModerator }),
+                        name,
+                        0
+                    )
+                })
+            }
+
+
+            // Continue typing to filter candidates
+            editable.append("li")
+            Selection.setSelection(editable, editable.length)
+
+            // Should show only Alice and Charlie
+            awaitItem().let { result ->
+                assertThat(result)
+                    .isInstanceOf(MentionViewModel.AutoCompleteState.Result::class.java)
+                result as MentionViewModel.AutoCompleteState.Result
+
+                assertThat(result.members[0].member.name).isEqualTo("Alice (pubk...key1)")
+                assertThat(result.members[1].member.name).isEqualTo("Charlie (pubk...key3)")
+            }
+        }
+    }
+
+    @Test
+    fun `should have normalised message with candidates selected`() = runTest {
+        mentionViewModel.autoCompleteState.test {
+            assertThat(awaitItem())
+                .isEqualTo(MentionViewModel.AutoCompleteState.Idle)
+
+            val editable = mentionViewModel.editableFactory.newEditable("")
+            editable.append("Hi @")
+            Selection.setSelection(editable, editable.length)
+
+            assertThat(awaitItem())
+                .isEqualTo(MentionViewModel.AutoCompleteState.Loading)
+
+            // Select a candidate now
+            assertThat(awaitItem())
+                .isInstanceOf(MentionViewModel.AutoCompleteState.Result::class.java)
+            mentionViewModel.onCandidateSelected("pubkey1")
+
+            // Should have normalised message with selected candidate
+            assertThat(mentionViewModel.normalizeMessageBody())
+                .isEqualTo("Hi @pubkey1 ")
+        }
+    }
+}

app/src/test/java/org/thoughtcrime/securesms/util/FlowUtilsTest.kt

@@ -0,0 +1,52 @@
+package org.thoughtcrime.securesms.util
+
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.toCollection
+import kotlinx.coroutines.flow.toList
+import kotlinx.coroutines.test.runTest
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class FlowUtilsTest {
+
+    @Test
+    fun `timedBuffer should emit buffer when it's full`() = runTest {
+        // Given
+        val flow = flowOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+        val timeoutMillis = 1000L
+        val maxItems = 5
+
+        // When
+        val result = flow.timedBuffer(timeoutMillis, maxItems).toList()
+
+        // Then
+        assertEquals(2, result.size)
+        assertEquals(listOf(1, 2, 3, 4, 5), result[0])
+        assertEquals(listOf(6, 7, 8, 9, 10), result[1])
+    }
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    @Test
+    fun `timedBuffer should emit buffer when timeout expires`() = runTest {
+        // Given
+        val flow = flow {
+            emit(1)
+            emit(2)
+            emit(3)
+            testScheduler.advanceTimeBy(200L)
+            emit(4)
+        }
+        val timeoutMillis = 100L
+        val maxItems = 5
+
+        // When
+        val result = flow.timedBuffer(timeoutMillis, maxItems).toList()
+
+        // Then
+        assertEquals(2, result.size)
+        assertEquals(listOf(1, 2, 3), result[0])
+        assertEquals(listOf(4), result[1])
+    }
+}

app/src/test/resources/TestAndroidManifest.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<manifest>
+
+</manifest>

app/src/test/resources/robolectric.properties

@@ -0,0 +1,3 @@
+manifest=TestAndroidManifest.xml
+sdk=34
+application=android.app.Application

libsession/src/main/java/org/session/libsession/database/StorageProtocol.kt

@@ -53,7 +53,7 @@ interface StorageProtocol {
     fun persistJob(job: Job)
     fun markJobAsSucceeded(jobId: String)
     fun markJobAsFailedPermanently(jobId: String)
-    fun getAllPendingJobs(type: String): Map<String,Job?>
+    fun getAllPendingJobs(vararg types: String): Map<String,Job?>
     fun getAttachmentUploadJob(attachmentID: Long): AttachmentUploadJob?
     fun getMessageSendJob(messageSendJobID: String): MessageSendJob?
     fun getMessageReceiveJob(messageReceiveJobID: String): Job?

libsession/src/main/java/org/session/libsession/messaging/jobs/AttachmentDownloadJob.kt

@@ -1,6 +1,8 @@
 package org.session.libsession.messaging.jobs
 
 import okhttp3.HttpUrl
+import org.session.libsession.database.MessageDataProvider
+import org.session.libsession.database.StorageProtocol
 import org.session.libsession.messaging.MessagingModuleConfiguration
 import org.session.libsession.messaging.open_groups.OpenGroupApi
 import org.session.libsession.messaging.sending_receiving.attachments.AttachmentId
@@ -40,6 +42,36 @@ class AttachmentDownloadJob(val attachmentID: Long, val databaseMessageID: Long)
         // Keys used for database storage
         private val ATTACHMENT_ID_KEY = "attachment_id"
         private val TS_INCOMING_MESSAGE_ID_KEY = "tsIncoming_message_id"
+
+        /**
+         * Check if the attachment in the given message is eligible for download.
+         *
+         * Note that this function only checks for the eligibility of the attachment in the sense
+         * of whether the download is allowed, it does not check if the download has already taken
+         * place.
+         */
+        fun eligibleForDownload(threadID: Long,
+                                storage: StorageProtocol,
+                                messageDataProvider: MessageDataProvider,
+                                databaseMessageID: Long): Boolean {
+            val threadRecipient = storage.getRecipientForThread(threadID) ?: return false
+
+            // if we are the sender we are always eligible
+            val selfSend = messageDataProvider.isMmsOutgoing(databaseMessageID)
+            if (selfSend) {
+                return true
+            }
+
+            // you can't be eligible without a sender
+            val sender = messageDataProvider.getIndividualRecipientForMms(databaseMessageID)?.address?.serialize()
+                ?: return false
+
+            // you can't be eligible without a contact entry
+            val contact = storage.getContactWithAccountID(sender) ?: return false
+
+            // we are eligible if we are receiving a group message or the contact is trusted
+            return threadRecipient.isGroupRecipient || contact.isTrusted
+        }
     }
 
     override suspend fun execute(dispatcherName: String) {
@@ -88,21 +120,7 @@ class AttachmentDownloadJob(val attachmentID: Long, val databaseMessageID: Long)
             return
         }
 
-        val threadRecipient = storage.getRecipientForThread(threadID)
-        val selfSend = messageDataProvider.isMmsOutgoing(databaseMessageID)
-        val sender = if (selfSend) {
-            storage.getUserPublicKey()
-        } else {
-            messageDataProvider.getIndividualRecipientForMms(databaseMessageID)?.address?.serialize()
-        }
-        val contact = sender?.let { storage.getContactWithAccountID(it) }
-        if (threadRecipient == null || sender == null || (contact == null && !selfSend)) {
-            handleFailure(Error.NoSender, null)
-            return
-        }
-        if (!threadRecipient.isGroupRecipient && contact?.isTrusted != true && storage.getUserPublicKey() != sender) {
-            // if we aren't receiving a group message, a message from ourselves (self-send) and the contact sending is not trusted:
-            // do not continue, but do not fail
+        if (!eligibleForDownload(threadID, storage, messageDataProvider, databaseMessageID)) {
             handleFailure(Error.NoSender, null)
             return
         }

libsession/src/main/java/org/session/libsession/messaging/jobs/ConfigurationSyncJob.kt

@@ -61,7 +61,7 @@ data class ConfigurationSyncJob(val destination: Destination): Job {
             SharedConfigurationMessage(config.protoKindFor(), data, seqNo) to config
         }.map { (message, config) ->
             // return a list of batch request objects
-            val snodeMessage = MessageSender.buildWrappedMessageToSnode(destination, message, true)
+            val snodeMessage = MessageSender.buildConfigMessageToSnode(destination.destinationPublicKey(), message)
             val authenticated = SnodeAPI.buildAuthenticatedStoreBatchInfo(
                 destination.destinationPublicKey(),
                 config.configNamespace(),

libsession/src/main/java/org/session/libsession/messaging/jobs/JobQueue.kt

@@ -102,7 +102,7 @@ class JobQueue : JobDelegate {
             execute(dispatcherName)
         }
         catch (e: Exception) {
-            Log.d(dispatcherName, "unhandledJobException: ${javaClass.simpleName} (id: $id)")
+            Log.d(dispatcherName, "unhandledJobException: ${javaClass.simpleName} (id: $id)", e)
             this@JobQueue.handleJobFailed(this, dispatcherName, e)
         }
     }

libsession/src/main/java/org/session/libsession/messaging/open_groups/GroupMember.kt

@@ -6,6 +6,11 @@ data class GroupMember(
     val role: GroupMemberRole
 )
 
-enum class GroupMemberRole {
-    STANDARD, ZOOMBIE, MODERATOR, ADMIN, HIDDEN_MODERATOR, HIDDEN_ADMIN
+enum class GroupMemberRole(val isModerator: Boolean = false) {
+    STANDARD,
+    ZOOMBIE,
+    MODERATOR(true),
+    ADMIN(true),
+    HIDDEN_MODERATOR(true),
+    HIDDEN_ADMIN(true),
 }

libsession/src/main/java/org/session/libsession/messaging/sending_receiving/MessageSender.kt

@@ -81,6 +81,15 @@ object MessageSender {
         }
     }
 
+    fun buildConfigMessageToSnode(destinationPubKey: String, message: SharedConfigurationMessage): SnodeMessage {
+        return SnodeMessage(
+            destinationPubKey,
+            Base64.encodeBytes(message.data),
+            ttl = message.ttl,
+            SnodeAPI.nowWithOffset
+        )
+    }
+
     // One-on-One Chats & Closed Groups
     @Throws(Exception::class)
     fun buildWrappedMessageToSnode(destination: Destination, message: Message, isSyncMessage: Boolean): SnodeMessage {

libsession/src/main/java/org/session/libsession/messaging/sending_receiving/pollers/Poller.kt

@@ -25,6 +25,7 @@ import org.session.libsession.snode.RawResponse
 import org.session.libsession.snode.SnodeAPI
 import org.session.libsession.snode.SnodeModule
 import org.session.libsession.utilities.ConfigFactoryProtocol
+import org.session.libsignal.utilities.Base64
 import org.session.libsignal.utilities.Log
 import org.session.libsignal.utilities.Namespace
 import org.session.libsignal.utilities.Snode
@@ -126,37 +127,26 @@ class Poller(private val configFactory: ConfigFactoryProtocol, debounceTimer: Ti
     private fun processConfig(snode: Snode, rawMessages: RawResponse, namespace: Int, forConfigObject: ConfigBase?) {
         if (forConfigObject == null) return
 
-        val messages = SnodeAPI.parseRawMessagesResponse(
-            rawMessages,
-            snode,
-            userPublicKey,
-            namespace,
-            updateLatestHash = true,
-            updateStoredHashes = true,
-        )
-
-        if (messages.isEmpty()) {
-            // no new messages to process
-            return
+        val messages = rawMessages["messages"] as? List<*>
+        val processed = if (!messages.isNullOrEmpty()) {
+            SnodeAPI.updateLastMessageHashValueIfPossible(snode, userPublicKey, messages, namespace)
+            SnodeAPI.removeDuplicates(userPublicKey, messages, namespace, true).mapNotNull { messageBody ->
+                val rawMessageAsJSON = messageBody as? Map<*, *> ?: return@mapNotNull null
+                val hashValue = rawMessageAsJSON["hash"] as? String ?: return@mapNotNull null
+                val b64EncodedBody = rawMessageAsJSON["data"] as? String ?: return@mapNotNull null
+                val timestamp = rawMessageAsJSON["t"] as? Long ?: SnodeAPI.nowWithOffset
+                val body = Base64.decode(b64EncodedBody)
+                Triple(body, hashValue, timestamp)
             }
+        } else emptyList()
+
+        if (processed.isEmpty()) return
 
         var latestMessageTimestamp: Long? = null
-        messages.forEach { (envelope, hash) ->
+        processed.forEach { (body, hash, timestamp) ->
             try {
-                val (message, _) = MessageReceiver.parse(data = envelope.toByteArray(),
-                    // assume no groups in personal poller messages
-                    openGroupServerID = null, currentClosedGroups = emptySet()
-                )
-                // sanity checks
-                if (message !is SharedConfigurationMessage) {
-                    Log.w("Loki", "shared config message handled in configs wasn't SharedConfigurationMessage but was ${message.javaClass.simpleName}")
-                    return@forEach
-                }
-                val merged = forConfigObject.merge(hash!! to message.data).firstOrNull { it == hash }
-                if (merged != null) {
-                    // We successfully merged the hash, we can now update the timestamp
-                    latestMessageTimestamp = if ((message.sentTimestamp ?: 0L) > (latestMessageTimestamp ?: 0L)) { message.sentTimestamp } else { latestMessageTimestamp }
-                }
+                forConfigObject.merge(hash to body)
+                latestMessageTimestamp = if (timestamp > (latestMessageTimestamp ?: 0L)) { timestamp } else { latestMessageTimestamp }
             } catch (e: Exception) {
                 Log.e("Loki", e)
             }

libsession/src/main/java/org/session/libsession/snode/OnionRequestAPI.kt

@@ -25,7 +25,6 @@ import org.session.libsignal.utilities.Snode
 import org.session.libsignal.utilities.ThreadUtils
 import org.session.libsignal.utilities.recover
 import org.session.libsignal.utilities.toHexString
-import java.util.Date
 import java.util.concurrent.atomic.AtomicReference
 import kotlin.collections.set
 

libsession/src/main/java/org/session/libsession/snode/SnodeAPI.kt

@@ -829,7 +829,7 @@ object SnodeAPI {
         }
     }
 
-    private fun updateLastMessageHashValueIfPossible(snode: Snode, publicKey: String, rawMessages: List<*>, namespace: Int) {
+    fun updateLastMessageHashValueIfPossible(snode: Snode, publicKey: String, rawMessages: List<*>, namespace: Int) {
         val lastMessageAsJSON = rawMessages.lastOrNull() as? Map<*, *>
         val hashValue = lastMessageAsJSON?.get("hash") as? String
         if (hashValue != null) {
@@ -839,7 +839,7 @@ object SnodeAPI {
         }
     }
 
-    private fun removeDuplicates(publicKey: String, rawMessages: List<*>, namespace: Int, updateStoredHashes: Boolean): List<*> {
+    fun removeDuplicates(publicKey: String, rawMessages: List<*>, namespace: Int, updateStoredHashes: Boolean): List<*> {
         val originalMessageHashValues = database.getReceivedMessageHashValues(publicKey, namespace)?.toMutableSet() ?: mutableSetOf()
         val receivedMessageHashValues = originalMessageHashValues.toMutableSet()
         val result = rawMessages.filter { rawMessage ->

libsession/src/main/res/values/strings.xml

@@ -73,4 +73,10 @@
     <string name="ConversationItem_group_action_left">%1$s has left the group.</string>
     <!-- RecipientProvider -->
     <string name="RecipientProvider_unnamed_group">Unnamed group</string>
+
+    <string name="clearDataErrorDescriptionGeneric">An unknown error occurred and your data was not deleted. Do you want to delete your data from just this device instead?</string>
+    <string name="errorUnknown">An unknown error occurred.</string>
+    <string name="clearDevice">Clear Device</string>
+    <string name="clearDeviceOnly">Clear device only</string>
+    <string name="clearDeviceAndNetwork">Clear device and network</string>
 </resources>

libsignal/src/main/java/org/session/libsignal/utilities/ThreadUtils.kt

@@ -4,7 +4,6 @@ import android.os.Process
 import kotlinx.coroutines.Dispatchers
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.LinkedBlockingQueue
-import java.util.concurrent.SynchronousQueue
 import java.util.concurrent.ThreadPoolExecutor
 import java.util.concurrent.TimeUnit
 import kotlin.coroutines.EmptyCoroutineContext