HypoAlarm/HypoAlarm/src/main/java/za/org/treehouse/HypoAlarm/AlarmNotify.java

package za.org.treehouse.HypoAlarm;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Build;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.support.v4.app.NotificationCompat;
import android.util.Log;

public class AlarmNotify extends Service {
    private static final int notifyID = 1;
    private volatile boolean notificationRunning = false;

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onDestroy() {
        // If the notification is cancelled, stop updating.
        notificationRunning = false;
        // Remove the notification in the notification bar
        NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        nm.cancel(notifyID);
        Log.d("AlarmNotify", "Notification stopped.");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        final int UPDATE_INTERVAL = 10*1000; // Timer is updated six times a minute
        SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);

        Log.d("AlarmNotify", "Notification started.");

        //final String phoneNumber = sharedPref.getString(getString(R.string.PhoneNumberPref), null);
        final int gracePeriod = sharedPref.getInt(getString(R.string.GracePeriodPref), MainActivity.defaultGracePeriod);

        Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_grey);
        final NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        final NotificationCompat.Builder notification = new NotificationCompat.Builder(this)
                .setContentTitle(getString(R.string.app_name))
                .setContentText(String.format(getString(R.string.notificationText), MainActivity.MinutesToGracePeriodStr(gracePeriod)))
                .setSmallIcon(R.drawable.alarm_notification)
                .setLargeIcon(bm)
                .setOnlyAlertOnce(true)
                .setAutoCancel(false);
        if (Build.VERSION.SDK_INT >= 16) {
            notification.setPriority(Notification.PRIORITY_HIGH);
        }

        // Set up dismiss action
        Intent cancellerIntent = new Intent(getBaseContext(), CancelGraceReceiver.class);
        PendingIntent cancellerPendingIntent = PendingIntent.getBroadcast(getBaseContext(), MainActivity.CANCEL_GRACE_REQUEST, cancellerIntent, PendingIntent.FLAG_CANCEL_CURRENT);

        // Cancel the grace period if the user clears the notification
        notification.setDeleteIntent(cancellerPendingIntent);
        // Allow the user to cancel by clicking a "Cancel" button
        notification.addAction(android.R.drawable.ic_menu_close_clear_cancel, getString(R.string.notificationCancellation), cancellerPendingIntent);
        // Allow the user to cancel by selecting the ContentText or ContentTitle
        notification.setContentIntent(cancellerPendingIntent);

        nm.cancel(notifyID);
        nm.notify(notifyID, notification.build());

        new Thread(new Runnable() {
            @Override
            public void run() {
                notificationRunning = true;
                // Make progress out of 1000 and not just 100, for greater resolution
                int max = 1000;
                // Count in milliseconds for greater progress resolution
                long graceEndTime = AlarmService.graceEndTime;
                long milliSecondsLeft = ((graceEndTime - System.currentTimeMillis()));
                long gracePeriodMilliSeconds = gracePeriod * 60 * 1000;
                int progress = (int) (((gracePeriodMilliSeconds - milliSecondsLeft) * max) / gracePeriodMilliSeconds);

                while (progress < max) {
                    // Stop the thread if the notification is cancelled elsewhere
                    if (!notificationRunning) {
                        return;
                    }
                    // Recalculate milliSecondsLeft so that progress gets updated correctly.
                    milliSecondsLeft = ((graceEndTime - System.currentTimeMillis()));
                    // Recalculate the progress
                    progress = (int) (((gracePeriodMilliSeconds - milliSecondsLeft) * max) / gracePeriodMilliSeconds);
                    int minutesLeft = (int) ((milliSecondsLeft / 1000) / 60);

                    if (Build.VERSION.SDK_INT >= 11) {
                        notification.setContentText(String.format(getString(R.string.notificationText), MainActivity.MinutesToGracePeriodStr(minutesLeft)));
                        notification.setProgress(max, progress, false);
                        // Update the notification
                        nm.notify(notifyID, notification.build());
                    }
                    //Log.d("AlarmNotify", "milliSecondsLeft is " + milliSecondsLeft + " and gracePeriodMilliSeconds is " + gracePeriodMilliSeconds);
                    //Log.d("AlarmNotify", "progress is " + progress + "; max is "  + max);

                    // Sleep until we need to update again
                    try {
                        Thread.sleep(UPDATE_INTERVAL);
                    } catch (InterruptedException e) {
                        Log.d("AlarmNotify", "sleep failure: " + e.toString());
                    }
                }
                stopSelf(); // stop notification service
            }
        }).start();

        return super.onStartCommand(intent, flags, startId);
    }
}