Fix EteBase delete issues

app/src/main/java/org/tasks/etebase/EteBaseClient.kt

@@ -75,9 +75,11 @@ class EteBaseClient(
         return item
     }
 
-    suspend fun deleteItem(collection: Collection, uid: String): Item? {
+    suspend fun deleteItem(collection: Collection, task: CaldavTask): Item? {
         val itemManager = etebase.collectionManager.getItemManager(collection)
-        return cache.itemGet(itemManager, collection.uid, uid)?.apply { delete() }
+        return cache.itemGet(itemManager, collection.uid, task.`object`!!)
+                ?.takeIf { !it.isDeleted }
+                ?.apply { delete() }
     }
 
     suspend fun updateCache(collection: Collection, items: List<Item>) {

app/src/main/java/org/tasks/etebase/EteBaseSynchronizer.kt

@@ -135,21 +135,23 @@ class EteBaseSynchronizer @Inject constructor(
             Timber.d("${caldavCalendar.name} up to date")
         }
         val changes = ArrayList<Item>()
-        for (task in caldavDao.getMoved(caldavCalendar.uuid!!)) {
-            client.deleteItem(collection, task.remoteId!!)?.let { changes.add(it) }
+        for (caldavTask in caldavDao.getMoved(caldavCalendar.uuid!!)) {
+            client.deleteItem(collection, caldavTask)
+                    ?.let { changes.add(it) }
+                    ?: caldavDao.delete(caldavTask)
         }
-        for (task in localChanges.values) {
-            val vtodo = task.vtodo
-            val existingTask = !isNullOrEmpty(vtodo)
+        for (change in localChanges.values) {
+            val task = change.task
+            val caldavTask = change.caldavTask
             if (task.isDeleted) {
-                if (existingTask) {
-                    client.deleteItem(collection, task.remoteId!!)?.let { changes.add(it) }
-                }
+                client.deleteItem(collection, caldavTask)
+                        ?.let { changes.add(it) }
+                        ?: taskDeleter.delete(task)
             } else {
                 changes.add(client.updateItem(
                         collection,
-                        task.caldavTask,
-                        iCal.toVtodo(task.caldavTask, task.task)
+                        caldavTask,
+                        iCal.toVtodo(caldavTask, task)
                 ))
             }
         }

app/src/main/java/org/tasks/etebase/EtebaseLocalCache.kt

@@ -66,7 +66,11 @@ class EtebaseLocalCache private constructor(context: Context, username: String)
     suspend fun itemSet(itemMgr: ItemManager, colUid: String, item: Item) {
         withContext(Dispatchers.IO) {
             if (item.isDeleted) {
-                fsCache.itemUnset(itemMgr, colUid, item.uid)
+                try {
+                    fsCache.itemUnset(itemMgr, colUid, item.uid)
+                } catch (e: UrlParseException) {
+                    // Ignore, as it just means the file doesn't exist
+                }
             } else {
                 fsCache.itemSet(itemMgr, colUid, item)
             }