fix: attachment downloads and uploads

enable multi-threaded attachment handling for messages to speed up download/upload and free up message processing queue.

leaving group removes appropriate entries now in threaddb

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

@@ -580,7 +580,7 @@ class Storage(context: Context, helper: SQLCipherOpenHelper) : Database(context,
         val mmsDb = DatabaseFactory.getMmsDatabase(context)
         val cursor = mmsDb.getMessage(mmsId)
         val reader = mmsDb.readerFor(cursor)
-        return reader.current.threadId
+        return reader.next.threadId
     }
 
     override fun getSessionRequestSentTimestamp(publicKey: String): Long? {

app/src/main/java/org/thoughtcrime/securesms/loki/activities/JoinPublicChatActivity.kt

@@ -189,6 +189,9 @@ class EnterChatURLFragment : Fragment() {
             }
             chip.chipIcon = drawable
             chip.text = defaultGroup.name
+            chip.setOnClickListener {
+                (requireActivity() as JoinPublicChatActivity).joinPublicChatIfPossible(defaultGroup.toJoinUrl())
+            }
             defaultRoomsGridLayout.addView(chip)
         }
         if (groups.size and 1 != 0) {

app/src/main/java/org/thoughtcrime/securesms/loki/api/PublicChatManager.kt

@@ -172,6 +172,7 @@ class PublicChatManager(private val context: Context) {
 
       DatabaseFactory.getLokiThreadDatabase(context).removePublicChat(threadID)
       pollers.remove(threadID)?.stop()
+      v2Pollers.remove(threadID)?.stop()
       observers.remove(threadID)
       startPollersIfNeeded()
     }

app/src/main/java/org/thoughtcrime/securesms/loki/database/LokiThreadDatabase.kt

@@ -89,7 +89,7 @@ class LokiThreadDatabase(context: Context, helper: SQLCipherOpenHelper) : Databa
             return null
         }
         val database = databaseHelper.readableDatabase
-        return database.get(publicChat, "${Companion.threadID} = ?", arrayOf(threadID.toString())) { cursor ->
+        return database.get(publicChatTable, "${Companion.threadID} = ?", arrayOf(threadID.toString())) { cursor ->
             val json = cursor.getString(publicChat)
             OpenGroupV2.fromJson(json)
         }