properly handle inserting and deleting threads from local db

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/MainActivity.kt

@@ -158,15 +158,15 @@ class MainActivity : SimpleActivity() {
 
     private fun getCachedConversations() {
         ensureBackgroundThread {
-            val conversations = conversationsDB.getAll().toMutableList() as ArrayList<Conversation>
+            val conversations = conversationsDB.getAll().sortedByDescending { it.date }.toMutableList() as ArrayList<Conversation>
             runOnUiThread {
                 setupConversations(conversations)
-                getNewConversations()
+                getNewConversations(conversations)
             }
         }
     }
 
-    private fun getNewConversations() {
+    private fun getNewConversations(cachedConversations: ArrayList<Conversation>) {
         val privateCursor = getMyContactsContentProviderCursorLoader().loadInBackground()
         ensureBackgroundThread {
             val conversations = getConversations()
@@ -186,7 +186,25 @@ class MainActivity : SimpleActivity() {
                 setupConversations(conversations)
             }
 
-            conversationsDB.insertAll(conversations)
+            conversations.forEach { clonedConversation ->
+                if (!cachedConversations.map { it.system_id }.contains(clonedConversation.system_id)) {
+                    conversationsDB.insertOrUpdate(clonedConversation)
+                    cachedConversations.add(clonedConversation)
+                }
+            }
+
+            cachedConversations.forEach { cachedConversation ->
+                if (!conversations.map { it.system_id }.contains(cachedConversation.system_id)) {
+                    conversationsDB.delete(cachedConversation.id!!)
+                }
+            }
+
+            cachedConversations.forEach { cachedConversation ->
+                val conv = conversations.firstOrNull { it.system_id == cachedConversation.system_id && it.getStringToCompare() != cachedConversation.getStringToCompare() }
+                if (conv != null) {
+                    conversationsDB.insertOrUpdate(conv)
+                }
+            }
         }
     }
 

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt

@@ -343,11 +343,15 @@ class ThreadActivity : SimpleActivity() {
 
     private fun askConfirmDelete() {
         ConfirmationDialog(this, getString(R.string.delete_whole_conversation_confirmation)) {
+            ensureBackgroundThread {
                 deleteConversation(threadId)
+                runOnUiThread {
                     refreshMessages()
                     finish()
                 }
             }
+        }
+    }
 
     private fun managePeople() {
         if (thread_add_contacts.isVisible()) {

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt

@@ -462,10 +462,12 @@ fun Context.insertNewSMS(address: String, subject: String, body: String, date: L
     return newUri?.lastPathSegment?.toInt() ?: 0
 }
 
-fun Context.deleteConversation(id: Int) {
+fun Context.deleteConversation(threadId: Int) {
+    conversationsDB.deleteThreadId(threadId.toLong())
+
     var uri = Sms.CONTENT_URI
     val selection = "${Sms.THREAD_ID} = ?"
-    val selectionArgs = arrayOf(id.toString())
+    val selectionArgs = arrayOf(threadId.toString())
     contentResolver.delete(uri, selection, selectionArgs)
 
     uri = Mms.CONTENT_URI

app/src/main/kotlin/com/simplemobiletools/smsmessenger/interfaces/ConversationsDao.kt

@@ -9,11 +9,14 @@ import com.simplemobiletools.smsmessenger.models.Conversation
 @Dao
 interface ConversationsDao {
     @Insert(onConflict = OnConflictStrategy.REPLACE)
-    fun insert(conversation: Conversation): Long
+    fun insertOrUpdate(conversation: Conversation): Long
-
-    @Insert(onConflict = OnConflictStrategy.REPLACE)
-    fun insertAll(conversations: List<Conversation>)
 
     @Query("SELECT * FROM conversations")
     fun getAll(): List<Conversation>
+
+    @Query("DELETE FROM conversations WHERE id = :id")
+    fun delete(id: Long)
+
+    @Query("DELETE FROM conversations WHERE system_id = :threadId")
+    fun deleteThreadId(threadId: Long)
 }