Clear empty drafts caused by version 1.1.1

See https://github.com/FossifyOrg/Messages/issues/274

app/src/main/kotlin/org/fossify/messages/activities/MainActivity.kt

@@ -60,6 +60,7 @@ import org.fossify.messages.databinding.ActivityMainBinding
 import org.fossify.messages.extensions.checkAndDeleteOldRecycleBinMessages
 import org.fossify.messages.extensions.clearAllMessagesIfNeeded
 import org.fossify.messages.extensions.clearExpiredScheduledMessages
+import org.fossify.messages.extensions.clearSystemDrafts
 import org.fossify.messages.extensions.config
 import org.fossify.messages.extensions.conversationsDB
 import org.fossify.messages.extensions.getConversations
@@ -287,7 +288,7 @@ class MainActivity : SimpleActivity() {
         checkWhatsNewDialog()
         storeStateVariables()
         getCachedConversations()
-
+        clearSystemDrafts()
         binding.noConversationsPlaceholder2.setOnClickListener {
             launchNewConversation()
         }

app/src/main/kotlin/org/fossify/messages/extensions/Context.kt

@@ -1102,6 +1102,23 @@ fun Context.deleteSmsDraft(threadId: Long) {
     }
 }
 
+// Revert changes done by version 1.1.1 (https://github.com/FossifyOrg/Messages/issues/274)
+fun Context.clearSystemDrafts() {
+    ensureBackgroundThread {
+        val uri = Sms.Draft.CONTENT_URI
+        val projection = arrayOf(Sms._ID, Sms.BODY)
+        queryCursor(uri = uri, projection = projection) { cursor ->
+            val draftId = cursor.getLongValue(Sms._ID)
+            val body = cursor.getStringValue(Sms.BODY) ?: return@queryCursor
+            if (body.isEmpty() || body.isBlank()) {
+                val draftUri = Uri.withAppendedPath(Sms.CONTENT_URI, "/${draftId}")
+                contentResolver.delete(draftUri, null, null)
+                return@queryCursor
+            }
+        }
+    }
+}
+
 fun Context.updateLastConversationMessage(threadId: Long) {
     updateLastConversationMessage(setOf(threadId))
 }