Enable stable ids again

now we have stable ids, sorta

app/src/main/kotlin/com/simplemobiletools/smsmessenger/adapters/ThreadAdapter.kt

@@ -67,6 +67,7 @@ class ThreadAdapter(
 
     init {
         setupDragListener(true)
+        setHasStableIds(true)
     }
 
     override fun getActionMenuId() = R.menu.cab_thread
@@ -142,6 +143,13 @@ class ThreadAdapter(
         bindViewHolder(holder)
     }
 
+    override fun getItemId(position: Int): Long {
+        return when (val item = getItem(position)) {
+            is Message -> Message.getStableId(item)
+            else -> item.hashCode().toLong()
+        }
+    }
+
     override fun getItemViewType(position: Int): Int {
         return when (val item = getItem(position)) {
             is ThreadLoading -> THREAD_LOADING

app/src/main/kotlin/com/simplemobiletools/smsmessenger/models/Message.kt

@@ -29,6 +29,20 @@ data class Message(
     fun millis() = date * 1000L
 
     companion object {
+
+        fun getStableId(message: Message): Long {
+            var result = message.id.hashCode()
+            result = 31 * result + message.body.hashCode()
+            result = 32 * result + message.date.hashCode()
+            result = 31 * result + message.threadId.hashCode()
+            result = 31 * result + message.isMMS.hashCode()
+            result = 31 * result + (message.attachment?.hashCode() ?: 0)
+            result = 31 * result + message.senderName.hashCode()
+            result = 31 * result + message.senderPhotoUri.hashCode()
+            result = 31 * result + message.isScheduled.hashCode()
+            return result.toLong()
+        }
+
         fun areItemsTheSame(old: Message, new: Message): Boolean {
             return old.id == new.id
         }
@@ -36,6 +50,7 @@ data class Message(
         fun areContentsTheSame(old: Message, new: Message): Boolean {
             return old.body == new.body &&
                 old.threadId == new.threadId &&
+                old.date == new.date &&
                 old.isMMS == new.isMMS &&
                 old.attachment == new.attachment &&
                 old.senderName == new.senderName &&