Fixed a couple of issues with the OpenGroupDeleteJob

Updated the OpenGroupDispatcher to have a thread limit of 8 (was previously unlimited which could result in the app getting flooded with threads under certain conditions)
Updated the OpenGroupDeleteJob to do bulk deletions (instead of individual message deletions)
Updated the OpenGroupDeleteJob to catch and report failures (wasn't previously happening)

app/src/main/java/org/thoughtcrime/securesms/attachments/DatabaseAttachmentProvider.kt

@@ -176,6 +176,11 @@ class DatabaseAttachmentProvider(context: Context, helper: SQLCipherOpenHelper)
         return messageDB.getMessageID(serverId, threadId)
     }
 
+    override fun getMessageIDs(serverIds: List<Long>, threadId: Long): Pair<List<Long>, List<Long>> {
+        val messageDB = DatabaseComponent.get(context).lokiMessageDatabase()
+        return messageDB.getMessageIDs(serverIds, threadId)
+    }
+
     override fun deleteMessage(messageID: Long, isSms: Boolean) {
         val messagingDatabase: MessagingDatabase = if (isSms)  DatabaseComponent.get(context).smsDatabase()
                                                    else DatabaseComponent.get(context).mmsDatabase()
@@ -184,6 +189,15 @@ class DatabaseAttachmentProvider(context: Context, helper: SQLCipherOpenHelper)
         DatabaseComponent.get(context).lokiMessageDatabase().deleteMessageServerHash(messageID)
     }
 
+    override fun deleteMessages(messageIDs: List<Long>, threadId: Long, isSms: Boolean) {
+        val messagingDatabase: MessagingDatabase = if (isSms)  DatabaseComponent.get(context).smsDatabase()
+                                                   else DatabaseComponent.get(context).mmsDatabase()
+
+        messagingDatabase.deleteMessages(messageIDs.toLongArray(), threadId)
+        DatabaseComponent.get(context).lokiMessageDatabase().deleteMessages(messageIDs)
+        DatabaseComponent.get(context).lokiMessageDatabase().deleteMessageServerHashes(messageIDs)
+    }
+
     override fun updateMessageAsDeleted(timestamp: Long, author: String) {
         val database = DatabaseComponent.get(context).mmsSmsDatabase()
         val address = Address.fromSerialized(author)

app/src/main/java/org/thoughtcrime/securesms/database/AttachmentDatabase.java

@@ -35,6 +35,7 @@ import com.bumptech.glide.Glide;
 
 import net.zetetic.database.sqlcipher.SQLiteDatabase;
 
+import org.apache.commons.lang3.StringUtils;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.session.libsession.messaging.sending_receiving.attachments.Attachment;
@@ -318,6 +319,28 @@ public class AttachmentDatabase extends Database {
     notifyAttachmentListeners();
   }
 
+  @SuppressWarnings("ResultOfMethodCallIgnored")
+  void deleteAttachmentsForMessages(long[] mmsIds) {
+    SQLiteDatabase database = databaseHelper.getWritableDatabase();
+    Cursor cursor           = null;
+    String mmsIdString = StringUtils.join(mmsIds, ',');
+
+    try {
+      cursor = database.query(TABLE_NAME, new String[] {DATA, THUMBNAIL, CONTENT_TYPE}, MMS_ID + " IN (?)",
+              new String[] {mmsIdString}, null, null, null);
+
+      while (cursor != null && cursor.moveToNext()) {
+        deleteAttachmentOnDisk(cursor.getString(0), cursor.getString(1), cursor.getString(2));
+      }
+    } finally {
+      if (cursor != null)
+        cursor.close();
+    }
+
+    database.delete(TABLE_NAME, MMS_ID + " IN (?)", new String[] {mmsIdString});
+    notifyAttachmentListeners();
+  }
+
   public void deleteAttachment(@NonNull AttachmentId id) {
     SQLiteDatabase database = databaseHelper.getWritableDatabase();
 

app/src/main/java/org/thoughtcrime/securesms/database/GroupReceiptDatabase.java

@@ -8,6 +8,7 @@ import androidx.annotation.NonNull;
 
 import net.zetetic.database.sqlcipher.SQLiteDatabase;
 
+import org.apache.commons.lang3.StringUtils;
 import org.session.libsession.utilities.Address;
 import org.thoughtcrime.securesms.database.helpers.SQLCipherOpenHelper;
 
@@ -109,6 +110,11 @@ public class GroupReceiptDatabase extends Database {
     db.delete(TABLE_NAME, MMS_ID + " = ?", new String[] {String.valueOf(mmsId)});
   }
 
+  void deleteRowsForMessages(long[] mmsIds) {
+    SQLiteDatabase db = databaseHelper.getWritableDatabase();
+    db.delete(TABLE_NAME, MMS_ID + " IN (?)", new String[] {StringUtils.join(mmsIds, ',')});
+  }
+
   void deleteAllRows() {
     SQLiteDatabase db = databaseHelper.getWritableDatabase();
     db.delete(TABLE_NAME, null, null);

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

@@ -77,6 +77,25 @@ class LokiMessageDatabase(context: Context, helper: SQLCipherOpenHelper) : Datab
         database.endTransaction()
     }
 
+    fun deleteMessages(messageIDs: List<Long>) {
+        val database = databaseHelper.writableDatabase
+        database.beginTransaction()
+
+        database.delete(
+            messageIDTable,
+            "${Companion.messageID} IN (${messageIDs.map { "?" }.joinToString(",")})",
+            messageIDs.map { "$it" }.toTypedArray()
+        )
+        database.delete(
+            messageThreadMappingTable,
+            "${Companion.messageID} IN (${messageIDs.map { "?" }.joinToString(",")})",
+            messageIDs.map { "$it" }.toTypedArray()
+        )
+
+        database.setTransactionSuccessful()
+        database.endTransaction()
+    }
+
     /**
      * @return pair of sms or mms table-specific ID and whether it is in SMS table
      */
@@ -96,6 +115,37 @@ class LokiMessageDatabase(context: Context, helper: SQLCipherOpenHelper) : Datab
         }
     }
 
+    fun getMessageIDs(serverIDs: List<Long>, threadID: Long): Pair<List<Long>, List<Long>> {
+        val database = databaseHelper.readableDatabase
+
+        // Retrieve the message ids
+        val messageIdCursor = database
+            .rawQuery(
+                """
+                    SELECT ${messageThreadMappingTable}.${messageID}, ${messageIDTable}.${messageType}
+                    FROM ${messageThreadMappingTable}
+                    JOIN ${messageIDTable} ON ${messageIDTable}.message_id = ${messageThreadMappingTable}.${messageID} 
+                    WHERE (
+                        ${messageThreadMappingTable}.${Companion.threadID} = $threadID AND
+                        ${messageThreadMappingTable}.${Companion.serverID} IN (${serverIDs.joinToString(",")})
+                    )
+                """
+            )
+
+        val smsMessageIds: MutableList<Long> = mutableListOf()
+        val mmsMessageIds: MutableList<Long> = mutableListOf()
+        while (messageIdCursor.moveToNext()) {
+            if (messageIdCursor.getInt(1) == SMS_TYPE) {
+                smsMessageIds.add(messageIdCursor.getLong(0))
+            }
+            else {
+                mmsMessageIds.add(messageIdCursor.getLong(0))
+            }
+        }
+
+        return Pair(smsMessageIds, mmsMessageIds)
+    }
+
     override fun setServerID(messageID: Long, serverID: Long, isSms: Boolean) {
         val database = databaseHelper.writableDatabase
         val contentValues = ContentValues(3)
@@ -183,6 +233,15 @@ class LokiMessageDatabase(context: Context, helper: SQLCipherOpenHelper) : Datab
         database.delete(messageHashTable, "${Companion.messageID} = ?", arrayOf(messageID.toString()))
     }
 
+    fun deleteMessageServerHashes(messageIDs: List<Long>) {
+        val database = databaseHelper.writableDatabase
+        database.delete(
+            messageHashTable,
+            "${Companion.messageID} IN (${messageIDs.map { "?" }.joinToString(",")})",
+            messageIDs.map { "$it" }.toTypedArray()
+        )
+    }
+
     fun migrateThreadId(legacyThreadId: Long, newThreadId: Long) {
         val database = databaseHelper.writableDatabase
         val contentValues = ContentValues(1)

app/src/main/java/org/thoughtcrime/securesms/database/MessagingDatabase.java

@@ -42,6 +42,7 @@ public abstract class MessagingDatabase extends Database implements MmsSmsColumn
   public abstract void markAsDeleted(long messageId, boolean read);
 
   public abstract boolean deleteMessage(long messageId);
+  public abstract boolean deleteMessages(long[] messageId, long threadId);
 
   public abstract void updateThreadId(long fromId, long toId);
 

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

@@ -995,6 +995,23 @@ class MmsDatabase(context: Context, databaseHelper: SQLCipherOpenHelper) : Messa
         return threadDeleted
     }
 
+    override fun deleteMessages(messageIds: LongArray, threadId: Long): Boolean {
+        val attachmentDatabase = get(context).attachmentDatabase()
+        val groupReceiptDatabase = get(context).groupReceiptDatabase()
+
+        queue(Runnable { attachmentDatabase.deleteAttachmentsForMessages(messageIds) })
+        groupReceiptDatabase.deleteRowsForMessages(messageIds)
+
+        val database = databaseHelper.writableDatabase
+        database!!.delete(TABLE_NAME, ID_IN, arrayOf(messageIds.joinToString(",")))
+
+        val threadDeleted = get(context).threadDatabase().update(threadId, false)
+        notifyConversationListeners(threadId)
+        notifyStickerListeners()
+        notifyStickerPackListeners()
+        return threadDeleted
+    }
+
     override fun updateThreadId(fromId: Long, toId: Long) {
         val contentValues = ContentValues(1)
         contentValues.put(THREAD_ID, toId)

app/src/main/java/org/thoughtcrime/securesms/database/SmsDatabase.java

@@ -31,6 +31,7 @@ import com.annimon.stream.Stream;
 import net.zetetic.database.sqlcipher.SQLiteDatabase;
 import net.zetetic.database.sqlcipher.SQLiteStatement;
 
+import org.apache.commons.lang3.StringUtils;
 import org.session.libsession.messaging.calls.CallMessageType;
 import org.session.libsession.messaging.messages.signal.IncomingGroupMessage;
 import org.session.libsession.messaging.messages.signal.IncomingTextMessage;
@@ -52,6 +53,7 @@ import org.thoughtcrime.securesms.dependencies.DatabaseComponent;
 
 import java.io.IOException;
 import java.security.SecureRandom;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
@@ -596,6 +598,30 @@ public class SmsDatabase extends MessagingDatabase {
     return threadDeleted;
   }
 
+  @Override
+  public boolean deleteMessages(long[] messageIds, long threadId) {
+    String[] argsArray = new String[messageIds.length];
+    String[] argValues = new String[messageIds.length];
+    Arrays.fill(argsArray, "?");
+
+    for (int i = 0; i < messageIds.length; i++) {
+      argValues[i] = (messageIds[i] + "");
+    }
+
+    String combinedMessageIdArgss = StringUtils.join(messageIds, ',');
+    String combinedMessageIds = StringUtils.join(messageIds, ',');
+    Log.i("MessageDatabase", "Deleting: " + combinedMessageIds);
+    SQLiteDatabase db = databaseHelper.getWritableDatabase();
+    db.delete(
+      TABLE_NAME,
+      ID + " IN (" + StringUtils.join(argsArray, ',') + ")",
+      argValues
+    );
+    boolean threadDeleted = DatabaseComponent.get(context).threadDatabase().update(threadId, false);
+    notifyConversationListeners(threadId);
+    return threadDeleted;
+  }
+
   @Override
   public void updateThreadId(long fromId, long toId) {
     ContentValues contentValues = new ContentValues(1);

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

@@ -20,7 +20,9 @@ interface MessageDataProvider {
      * @return pair of sms or mms table-specific ID and whether it is in SMS table
      */
     fun getMessageID(serverId: Long, threadId: Long): Pair<Long, Boolean>?
+    fun getMessageIDs(serverIDs: List<Long>, threadID: Long): Pair<List<Long>, List<Long>>
     fun deleteMessage(messageID: Long, isSms: Boolean)
+    fun deleteMessages(messageIDs: List<Long>, threadId: Long, isSms: Boolean)
     fun updateMessageAsDeleted(timestamp: Long, author: String)
     fun getServerHashForMessage(messageID: Long): String?
     fun getDatabaseAttachment(attachmentId: Long): DatabaseAttachment?

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

@@ -26,7 +26,7 @@ class JobQueue : JobDelegate {
     private val jobTimestampMap = ConcurrentHashMap<Long, AtomicInteger>()
     private val rxDispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
     private val rxMediaDispatcher = Executors.newFixedThreadPool(4).asCoroutineDispatcher()
-    private val openGroupDispatcher = Executors.newCachedThreadPool().asCoroutineDispatcher()
+    private val openGroupDispatcher = Executors.newFixedThreadPool(8).asCoroutineDispatcher()//Executors.newCachedThreadPool().asCoroutineDispatcher()
     private val txDispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
     private val scope = CoroutineScope(Dispatchers.Default) + SupervisorJob()
     private val queue = Channel<Job>(UNLIMITED)

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

@@ -23,15 +23,28 @@ class OpenGroupDeleteJob(private val messageServerIds: LongArray, private val th
         val dataProvider = MessagingModuleConfiguration.shared.messageDataProvider
         val numberToDelete = messageServerIds.size
         Log.d(TAG, "Deleting $numberToDelete messages")
-        var numberDeleted = 0
-        messageServerIds.forEach { serverId ->
-            val (messageId, isSms) = dataProvider.getMessageID(serverId, threadId) ?: return@forEach
-            dataProvider.deleteMessage(messageId, isSms)
-            numberDeleted++
+
+        // FIXME: This entire process should probably run in a transaction (with the attachment deletion happening only if it succeeded)
+        try {
+            val messageIds = dataProvider.getMessageIDs(messageServerIds.toList(), threadId)
+
+            // Delete the SMS messages
+            if (messageIds.first.isNotEmpty()) {
+                dataProvider.deleteMessages(messageIds.first, threadId, true)
             }
-        Log.d(TAG, "Deleted $numberDeleted messages successfully")
+
+            // Delete the MMS messages
+            if (messageIds.second.isNotEmpty()) {
+                dataProvider.deleteMessages(messageIds.second, threadId, false)
+            }
+
+            Log.d(TAG, "Deleted ${messageIds.first.size + messageIds.second.size} messages successfully")
             delegate?.handleJobSucceeded(this)
         }
+        catch (e: Exception) {
+            delegate?.handleJobFailed(this, e)
+        }
+    }
 
     override fun serialize(): Data = Data.Builder()
         .putLongArray(MESSAGE_IDS, messageServerIds)