it.gulch.linuxday.android.alarms.FosdemAlarmManager.java Source code

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Here is the source code for it.gulch.linuxday.android.alarms.FosdemAlarmManager.java

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/*
 * Copyright 2014 Christophe Beyls
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package it.gulch.linuxday.android.alarms;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.preference.PreferenceManager;
import android.support.v4.content.LocalBroadcastManager;

import it.gulch.linuxday.android.constants.ActionConstants;
import it.gulch.linuxday.android.fragments.SettingsFragment;
import it.gulch.linuxday.android.services.AlarmIntentService;

/**
 * This class monitors bookmarks and preferences changes to dispatch alarm update work to AlarmIntentService.
 *
 * @author Christophe Beyls
 */
public class FosdemAlarmManager implements OnSharedPreferenceChangeListener {
    private static FosdemAlarmManager instance;

    private Context context;

    private boolean isEnabled;

    private final BroadcastReceiver scheduleRefreshedReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            // When the schedule DB is updated, update the alarms too
            startUpdateAlarms();
        }
    };

    private final BroadcastReceiver bookmarksReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            // Dispatch the Bookmark broadcasts to the service
            Intent serviceIntent = new Intent(context, AlarmIntentService.class);
            serviceIntent.setAction(intent.getAction());
            serviceIntent.putExtras(intent.getExtras());
            context.startService(serviceIntent);
        }
    };

    public static void init(Context context) {
        if (instance == null) {
            instance = new FosdemAlarmManager(context);
        }
    }

    public static FosdemAlarmManager getInstance() {
        return instance;
    }

    private FosdemAlarmManager(Context context) {
        this.context = context;
        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
        isEnabled = sharedPreferences.getBoolean(SettingsFragment.KEY_PREF_NOTIFICATIONS_ENABLED, false);
        if (isEnabled) {
            registerReceivers();
        }
        sharedPreferences.registerOnSharedPreferenceChangeListener(this);
    }

    public boolean isEnabled() {
        return isEnabled;
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
        if (SettingsFragment.KEY_PREF_NOTIFICATIONS_ENABLED.equals(key)) {
            isEnabled = sharedPreferences.getBoolean(SettingsFragment.KEY_PREF_NOTIFICATIONS_ENABLED, false);
            if (isEnabled) {
                registerReceivers();
                startUpdateAlarms();
            } else {
                unregisterReceivers();
                startDisableAlarms();
            }
        } else if (SettingsFragment.KEY_PREF_NOTIFICATIONS_DELAY.equals(key)) {
            startUpdateAlarms();
        }
    }

    private void registerReceivers() {
        LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);
        lbm.registerReceiver(scheduleRefreshedReceiver,
                new IntentFilter(ActionConstants.ACTION_SCHEDULE_REFRESHED));
        IntentFilter filter = new IntentFilter();
        filter.addAction(ActionConstants.ACTION_ADD_BOOKMARK);
        filter.addAction(ActionConstants.ACTION_REMOVE_BOOKMARKS);
        lbm.registerReceiver(bookmarksReceiver, filter);
    }

    private void unregisterReceivers() {
        LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);
        lbm.unregisterReceiver(scheduleRefreshedReceiver);
        lbm.unregisterReceiver(bookmarksReceiver);
    }

    private void startUpdateAlarms() {
        Intent serviceIntent = new Intent(context, AlarmIntentService.class);
        serviceIntent.setAction(AlarmIntentService.ACTION_UPDATE_ALARMS);
        context.startService(serviceIntent);
    }

    private void startDisableAlarms() {
        Intent serviceIntent = new Intent(context, AlarmIntentService.class);
        serviceIntent.setAction(AlarmIntentService.ACTION_DISABLE_ALARMS);
        context.startService(serviceIntent);
    }
}