Mutation and update cache

Open TaskFragment.kt and add the following function to delete all the completed todos from the cloud.

TaskFragment.kt

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private fun removeAllCompletedCloud(){
        // Init Query
        clearCompletedMutation = ClearCompletedMutation.builder().build()

        // Apollo runs query on background thread
        Network.apolloClient.mutate(clearCompletedMutation)?.enqueue(object : ApolloCall.Callback<ClearCompletedMutation.Data>() {
            override fun onFailure(error: ApolloException) {
                Log.d("Todo", error.toString() )
            }

            override fun onResponse(@NotNull response: Response<ClearCompletedMutation.Data>) {
                // get data from local cache and update the list
                val todos = listItems?.filter { task -> task.is_completed }
                Network.apolloClient
                    .apolloStore()
                    .write(GetMyTodosQuery(), GetMyTodosQuery.Data(todos!!)).execute()
                getMyTodosQueryLocal()
            }
        })
    }

And finally update the removeAllCompleted function as below

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  private fun removeAllCompleted() {
-       // Todo : Method for clearing all completed task at once
+       removeAllCompletedCloud()
    }

That's a wrap of the todo app.