fedilab-Android-App/app/src/main/java/app/fedilab/android/asynctasks/RetrieveMissingNotificationsAsyncTask.java

/* Copyright 2017 Thomas Schneider
 *
 * This file is a part of Fedilab
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * Fedilab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with Fedilab; if not,
 * see <http://www.gnu.org/licenses>. */
package app.fedilab.android.asynctasks;

import android.content.Context;
import android.os.Handler;
import android.os.Looper;

import java.lang.ref.WeakReference;
import java.util.List;

import app.fedilab.android.activities.MainActivity;
import app.fedilab.android.client.API;
import app.fedilab.android.client.APIResponse;
import app.fedilab.android.client.Entities.Error;
import app.fedilab.android.client.Entities.Notification;
import app.fedilab.android.fragments.DisplayNotificationsFragment;
import app.fedilab.android.interfaces.OnRetrieveMissingNotificationsInterface;


/**
 * Created by Thomas on 27/09/2017.
 * Retrieves missing notifications since last pause
 */

public class RetrieveMissingNotificationsAsyncTask {


    private final OnRetrieveMissingNotificationsInterface listener;
    private final WeakReference<Context> contextReference;
    private final DisplayNotificationsFragment.Type type;
    private String since_id;
    private List<Notification> notifications;
    private Error error;

    public RetrieveMissingNotificationsAsyncTask(Context context, DisplayNotificationsFragment.Type type, String since_id, OnRetrieveMissingNotificationsInterface onRetrieveMissingNotifications) {
        this.contextReference = new WeakReference<>(context);
        this.since_id = since_id;
        this.listener = onRetrieveMissingNotifications;
        this.type = type;
        doInBackground();
    }

    protected void doInBackground() {
        new Thread(() -> {
            API api = new API(this.contextReference.get());
            APIResponse apiResponse = api.getNotificationsSince(type, since_id, 40, false);
            if (apiResponse == null) {
                error = new Error();
                error.setError("");
                return;
            }
            error = apiResponse.getError();
            since_id = apiResponse.getSince_id();
            notifications = apiResponse.getNotifications();
            if (notifications != null && notifications.size() > 0) {
                MainActivity.lastNotificationId = notifications.get(0).getId();
            }
            Handler mainHandler = new Handler(Looper.getMainLooper());
            Runnable myRunnable = () -> {
                if (error == null) {
                    listener.onRetrieveMissingNotifications(notifications);
                }
            };
            mainHandler.post(myRunnable);
        }).start();
    }

}