Stop long polling on error

[fonbot.git] / src / ro / ieval / fonbot / Heavy.java

package ro.ieval.fonbot;

import static ro.ieval.fonbot.R.string.*;
import static ro.ieval.fonbot.Utils.toNonNull;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.channels.FileChannel;
import java.nio.channels.SocketChannel;
import java.util.ArrayList;
import java.util.Date;

import org.eclipse.jdt.annotation.Nullable;

import ro.ieval.fonbot.Utils.Command;
import ro.ieval.fonbot.Utils.MessageType;
import ro.ieval.fonbot.Utils.OngoingEvent;
import ro.ieval.fonbot.Utils.RingerMode;
import ro.ieval.fonbot.Utils.WipeType;
import android.annotation.SuppressLint;
import android.app.AlarmManager;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.admin.DevicePolicyManager;
import android.bluetooth.BluetoothAdapter;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.graphics.ImageFormat;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.media.AudioManager;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.ConnectivityManager;
import android.net.Uri;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.BatteryManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.PowerManager;
import android.os.SystemClock;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.provider.BaseColumns;
import android.provider.CallLog.Calls;
import android.provider.ContactsContract.CommonDataKinds;
import android.provider.ContactsContract.CommonDataKinds.BaseTypes;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.Data;
import android.provider.Settings.Secure;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.support.v4.app.NotificationCompat;
import android.telephony.SmsManager;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.SurfaceView;
import android.widget.Toast;

import com.android.internal.telephony.ITelephony;

/*
 * Copyright © 2013 Marius Gavrilescu
 * 
 * This file is part of FonBot.
 *
 * FonBot 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.
 *
 * FonBot 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 FonBot.  If not, see <http://www.gnu.org/licenses/>. 
 */

/**
 * Implementation of all FonBot commands. The methods of this class do not do argument checking.
 *
 * @author Marius Gavrilescu <marius@ieval.ro>
 */
final class Heavy {
	/**
	 * LocationListener that sends notifications to the user.
	 * 
	 * @author Marius Gavrilescu <marius@ieval.ro>
	 */
	private static final class FonBotLocationListener implements LocationListener {
		/** Context instance */
		private final Context context;
		/** Destination address for notifications */ 
		private final Address replyTo;

		/**
		 * Construct a FonBotLocationListener.
		 * 
		 * @param context Context instance
		 * @param replyTo the reply address
		 */
		FonBotLocationListener(final Context context, final Address replyTo) {
			this.context=context;
			this.replyTo=replyTo;
		}

		@Override
		public void onLocationChanged(@Nullable final Location loc) {
			if(loc==null)
				return;
			final StringBuilder sb=new StringBuilder(toNonNull(context.getString(location)));
			sb.append(": ");
			sb.append(toNonNull(context.getString(latitude)));
			sb.append(": ");
			sb.append(loc.getLatitude());
			sb.append(", ");
			sb.append(toNonNull(context.getString(longitude)));
			sb.append(": ");
			sb.append(loc.getLongitude());

			if(loc.hasAccuracy()){
				sb.append(", ");
				sb.append(toNonNull(context.getString(accuracy)));
				sb.append(": ");
				sb.append(loc.getAccuracy());
			}

			if(loc.hasAltitude()){
				sb.append(", ");
				sb.append(toNonNull(context.getString(altitude)));
				sb.append(": ");
				sb.append(loc.getAltitude());
			}

			if(loc.hasBearing()){
				sb.append(", ");
				sb.append(toNonNull(context.getString(bearing)));
				sb.append(": ");
				sb.append(loc.getBearing());
			}

			if(loc.hasSpeed()){
				sb.append(", ");
				sb.append(toNonNull(context.getString(speed)));
				sb.append(": ");
				sb.append(loc.getSpeed());
			}

			final Date locationDate=new Date(loc.getTime());
			sb.append(" ");
			sb.append(toNonNull(context.getString(at)));
			sb.append(" ");
			sb.append(locationDate.toString());
			sb.append(". ");

			sb.append("http://openstreetmap.org/?zoom=15&mlat=");
			sb.append(loc.getLatitude());
			sb.append("&mlon=");
			sb.append(loc.getLongitude());
			Utils.sendMessage(toNonNull(context), toNonNull(replyTo), toNonNull(sb.toString()));
		}

		@Override
		public void onProviderDisabled(@Nullable final String provider) {
			Utils.sendMessage(toNonNull(context), toNonNull(replyTo), location_provider_disabled, provider);
		}
		
		@Override
		public void onProviderEnabled(@Nullable final String provider) {
			Utils.sendMessage(toNonNull(context), toNonNull(replyTo), location_provider_enabled, provider);
		}

		@Override
		public void onStatusChanged(@Nullable final String provider, final int status, @Nullable final Bundle extras) {
			final int state;
			switch(status){
			case LocationProvider.AVAILABLE:
				state=location_provider_available;
				break;
			case LocationProvider.TEMPORARILY_UNAVAILABLE:
				state=location_provider_temporary_unavailable;
				break;
			case LocationProvider.OUT_OF_SERVICE:
				state=location_provider_out_of_service;
				break;
			default:
				state=location_provider_unknown_state;
			}
			Utils.sendMessage(toNonNull(context), toNonNull(replyTo), state, provider);
		}
	}
	/**
	 * Currently active FonBotLocationListener
	 */
	private static FonBotLocationListener locationListener = null;

	/**
	 * AsyncTask that sends a byte[] to a server
	 *
	 * @author Marius Gavrilescu <marius@ieval.ro>
	 *
	 */
	private static class SendDataAsyncTask extends AsyncTask<Void, Void, Void>{
		/**
		 * Context instance used by this class
		 */
		private final Context context;
		/**
		 * Server hostname
		 */
		private final String hostname;
		/**
		 * Server port
		 */
		private final int port;
		/**
		 * Data to send
		 */
		private final byte[] data;
		/**
		 * Address for sending back errors and success messages
		 */
		private final Address replyTo;

		/**
		 * Constructs a SendDataAsyncTasks from its parameters
		 *
		 * @param context the context
		 * @param replyTo the reply Address
		 * @param hostname the server hostname
		 * @param port the server port
		 * @param data the data to send
		 */
		public SendDataAsyncTask(final Context context,final Address replyTo, final String hostname, final int port, final byte[] data) {//NOPMD array is immutable
			super();
			this.context=context;
			this.hostname=hostname;
			this.port=port;
			this.data=data;
			this.replyTo=replyTo;
		}

		@Override
		protected @Nullable Void doInBackground(@Nullable final Void... params) {
			final Socket sock;
			try {
				sock = new Socket(hostname, port);
				try {
					sock.getOutputStream().write(data);
				} catch (IOException e) {
					Utils.sendMessage(toNonNull(context), toNonNull(replyTo), error_writing_to_socket, e.getMessage());
					return null;
				}

				try {
					sock.close();
				} catch (IOException e) {
					Utils.sendMessage(toNonNull(context), toNonNull(replyTo), cannot_close_socket, e.getMessage());
					return null;
				}
			} catch (UnknownHostException e) {
				Utils.sendMessage(toNonNull(context), toNonNull(replyTo), unknown_host, hostname);
				return null;
			} catch (IOException e) {
				Utils.sendMessage(toNonNull(context), toNonNull(replyTo), cannot_connect_to_host_on_port, hostname, Integer.valueOf(port));
				return null;
			}
			Utils.sendMessage(toNonNull(context), toNonNull(replyTo), photo_sent);
			return null;
		}
	}

	/**
	 * ExecutableRunnable that uploads a file to a given host and port, netcat-style
	 *
	 * @author Marius Gavrilescu <marius@ieval.ro>
	 */
	private static final class NcfileExecutableRunnable extends ExecutableRunnable {
		private final Context context;
		private final Address replyTo;
		private final String filename;
		private final String hostname;
		private final int port;

		/**
		 * Construct a NcfileExecutableRunnable
		 *
		 * @param context Context instance
		 * @param replyTo reply Address
		 * @param filename filename to upload
		 * @param hostname hostname to upload to
		 * @param port port to upload to
		 */
		NcfileExecutableRunnable(final Context context, final Address replyTo, final String filename, final String hostname, final int port){
			this.context=context;
			this.replyTo=replyTo;
			this.filename=filename;
			this.hostname=hostname;
			this.port=port;
		}

		@Override public void run(){
			final FileChannel in;
			final SocketChannel sock;
			try{
				in=new FileInputStream(filename).getChannel();
			} catch (final FileNotFoundException e){
				Utils.sendMessage(context, replyTo, file_not_found, filename);
				return;
			}

			try{
				sock = SocketChannel.open(new InetSocketAddress(hostname, port));
			} catch (final IOException e){
				Utils.sendMessage(context, replyTo, toNonNull(context.getString(cannot_connect_to_host_on_port, hostname, Integer.valueOf(port))));
				try {
					in.close();
				} catch (IOException ex) {
					//ignored
				}
				return;
			}

			try{
				in.transferTo(0, in.size(), sock);
			} catch (final IOException e){
				Utils.sendMessage(context, replyTo, toNonNull(context.getString(io_error, e.getMessage())));
			} finally {
				try{
					in.close();
				} catch (IOException e){
					//ignored
				}
				try{
					sock.close();
				} catch(IOException e){
					//ignored
				}
			}
			Utils.sendMessage(context, replyTo, file_sent);
		}
	}

	/**
	 * ExecutableRunnable that downloads a file from a given host and port, netcat-style
	 *
	 * @author Marius Gavrilescu <marius@ieval.ro>
	 */
	private static final class GetfileExecutableRunnable extends ExecutableRunnable {
		private final Context context;
		private final Address replyTo;
		private final String filename;
		private final String hostname;
		private final int port;

		/**
		 * Construct a GetfileExecutableRunnable
		 *
		 * @param context Context instance
		 * @param replyTo reply Address
		 * @param filename filename to save to
		 * @param hostname hostname to download from
		 * @param port port to download from
		 */
		GetfileExecutableRunnable(final Context context, final Address replyTo, final String filename, final String hostname, final int port){
			this.context=context;
			this.replyTo=replyTo;
			this.filename=filename;
			this.hostname=hostname;
			this.port=port;
		}

		@Override public void run(){
			final InputStream in;
			final FileOutputStream out;
			final Socket sock;
			try{
				out=new FileOutputStream(filename);
			} catch (final IOException e){
				Utils.sendMessage(context, replyTo, error_opening_file, filename, e.getMessage());
				return;
			}

			try{
				sock = new Socket(hostname, port);
				in = sock.getInputStream();
			} catch (final IOException e){
				Utils.sendMessage(context, replyTo, toNonNull(context.getString(cannot_connect_to_host_on_port, hostname, Integer.valueOf(port))));
				try {
					out.close();
				} catch (IOException ex) {
					//ignored
				}
				return;
			}

			try{
				byte[] buffer=new byte[1024*1024*2];
				int nread;
				while((nread = in.read(buffer)) > 0)
					out.write(buffer, 0, nread);
			} catch (final IOException e){
				Utils.sendMessage(context, replyTo, toNonNull(context.getString(io_error, e.getMessage())));
			} finally {
				try{
					out.close();
				} catch (IOException e){
					//ignored
				}
				try{
					sock.close();
				} catch(IOException e){
					//ignored
				}
			}
			Utils.sendMessage(context, replyTo, file_received);
		}
	}

	/**
	 * PictureCallback that sends the picture to a server.
	 *
	 * @author Marius Gavrilescu <marius@ieval.ro>
	 */
	private static final class FonBotPictureCallback implements PictureCallback{
		/** Server hostname */
		private final String hostname;
		/** Server port */
		private final int port;
		/** Context instance */
		private final Context context;
		/** Reply address */
		private final Address replyTo;

		/**
		 * Construct a FonBotPictureCallback.
		 *
		 * @param context Context instance
		 * @param replyTo reply Address
		 * @param hostname server hostname
		 * @param port server port
		 */
		FonBotPictureCallback(final Context context, final Address replyTo, final String hostname, final int port) {
			this.hostname=hostname;
			this.port=port;
			this.context=context;
			this.replyTo=replyTo;
		}
		
		@Override
		@SuppressWarnings("hiding")
		public void onPictureTaken(final @Nullable byte[] data, final @Nullable Camera camera) {
			if(camera==null || data==null)
				return;
			camera.stopPreview();
			stopCamera();
			Utils.sendMessage(toNonNull(context), toNonNull(replyTo), sending_photo);
			new SendDataAsyncTask(toNonNull(context), toNonNull(replyTo), toNonNull(hostname), port, data).execute();
		}
	}

	/**
	 * Runnable that takes a screen capture and stores it in a file.
	 */
	private static final class ScreencapRunnable implements Runnable{
		private final Context context;
		private final Address replyTo;
		private final String filename;

		ScreencapRunnable(final Context context, final Address replyTo, final String filename){
			this.context=context;
			this.replyTo=replyTo;
			this.filename=filename;
		}

		@Override
		public void run(){
			final int exitCode;
			try {
				exitCode=Runtime.getRuntime().exec(new String[]{
						"su",
						"-c",
						"screencap -p \"" + filename + "\""
					}).waitFor();
			} catch (final Exception e){
				e.printStackTrace();
				Utils.sendMessage(toNonNull(context), toNonNull(replyTo), screencap_failed);
				return;
			}

			if(exitCode == 0 && new File(filename).exists())
				Utils.sendMessage(toNonNull(context), toNonNull(replyTo), screencap_successful);
			else
				Utils.sendMessage(toNonNull(context), toNonNull(replyTo), screencap_failed);
		}
	}

	/**
	 * Get help for a particular command
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param command command to get help for
	 */
	public static void help(final Context context, final Address replyTo, final Command command){//NOPMD method is a big switch statement. Nothing confusing.
		switch(command){
		case ANSWER:
			Utils.sendMessage(context, replyTo, answer_help);
			break;
		case BATT:
			Utils.sendMessage(context, replyTo, batt_help);
			break;
		case BLUETOOTH:
			Utils.sendMessage(context, replyTo, bluetooth_help);
			break;
		case CALLLOG:
			Utils.sendMessage(context, replyTo, calllog_help);
			break;
		case CONTACTS:
			Utils.sendMessage(context, replyTo, contacts_help);
			break;
		case DATA:
			Utils.sendMessage(context, replyTo, data_help);
			break;
		case DELNOTIFICATION:
			Utils.sendMessage(context, replyTo, delnotification_help, Utils.join(", ", toNonNull(MessageType.values())));
			break;
		case DIAL:
			Utils.sendMessage(context, replyTo, dial_help);
			break;
		case DIALOG:
			Utils.sendMessage(context, replyTo, dialog_help);
			break;
		case DISABLE:
			Utils.sendMessage(context, replyTo, disable_help, Utils.join(", ", toNonNull(Command.values())));
			break;
		case ECHO:
			Utils.sendMessage(context, replyTo, echo_help);
			break;
		case ENABLE:
			Utils.sendMessage(context, replyTo, enable_help, Utils.join(", ", toNonNull(Command.values())));
			break;
		case FLASH:
			Utils.sendMessage(context, replyTo, flash_help);
			break;
		case GLOCATION:
			Utils.sendMessage(context, replyTo, glocation_help);
			break;
		case GPS:
			Utils.sendMessage(context, replyTo, gps_help);
			break;
		case HANGUP:
			Utils.sendMessage(context, replyTo, hangup_help);
			break;
		case HELP:
			Utils.sendMessage(context, replyTo, help_help, Utils.join(", ",toNonNull(Command.values())));
			break;
		case LAUNCH:
			Utils.sendMessage(context, replyTo, launch_help);
			break;
		case LOCATION:
			Utils.sendMessage(context, replyTo, location_help, Utils.join(", ",toNonNull(Utils.LocationProvider.values())));
			break;
		case LOCK:
			Utils.sendMessage(context, replyTo, lock_help);
			break;
		case LS:
			Utils.sendMessage(context, replyTo, ls_help);
			break;
		case NCFILE:
			Utils.sendMessage(context, replyTo, ncfile_help);
			break;
		case NEXT:
			Utils.sendMessage(context, replyTo, next_help);
			break;
		case NOLOCATION:
			Utils.sendMessage(context, replyTo, nolocation_help);
			break;
		case PAUSE:
			Utils.sendMessage(context, replyTo, pause_help);
			break;
		case PHOTO:
			Utils.sendMessage(context, replyTo, photo_help);
			break;
		case PLAY:
			Utils.sendMessage(context, replyTo, play_help);
			break;
		case POLL:
			Utils.sendMessage(context, replyTo, poll_help);
			break;
		case PREV:
			Utils.sendMessage(context, replyTo, prev_help);
			break;
		case RING:
			Utils.sendMessage(context, replyTo, ring_help);
			break;
		case RINGER:
			Utils.sendMessage(context, replyTo, ringer_help, Utils.join(", ", toNonNull(RingerMode.values())));
			break;
		case RM:
			Utils.sendMessage(context, replyTo, rm_help);
			break;
		case SETNOTIFICATION:
			Utils.sendMessage(context, replyTo, setnotification_help, Utils.join(", ", toNonNull(MessageType.values())));
			break;
		case SETPASSWORD:
			Utils.sendMessage(context, replyTo, setpassword_help);
			break;
		case SMS:
			Utils.sendMessage(context, replyTo, sms_help);
			break;
		case SMSLOG:
			Utils.sendMessage(context, replyTo, smslog_help);
			break;
		case SPEAK:
			Utils.sendMessage(context, replyTo, speak_help);
			break;
		case TOAST:
			Utils.sendMessage(context, replyTo, toast_help);
			break;
		case VIBRATE:
			Utils.sendMessage(context, replyTo, vibrate_help);
			break;
		case VIEW:
			Utils.sendMessage(context, replyTo, view_help);
			break;
		case WIFI:
			Utils.sendMessage(context, replyTo, wifi_help);
			break;
		case WIPE:
			Utils.sendMessage(context, replyTo, wipe_help, Utils.WIPE_CONFIRM_STRING);
			break;
		case REBOOT:
			Utils.sendMessage(context, replyTo, reboot_help);
			break;
		case NOTIFY:
			Utils.sendMessage(context, replyTo, notify_help);
			break;
		case SCREENCAP:
			Utils.sendMessage(context, replyTo, screencap_help);
			break;
		case TORCH:
			Utils.sendMessage(context, replyTo, torch_help);
			break;
		}
	}

	/**
	 * Camera instance.
	 *
	 * @see #startCamera(Context, Address)
	 * @see #stopCamera()
	 */
	private static Camera camera;
	/**
	 * Ringtone used by the {@link Utils.Command#RING RING} command.
	 *
	 * @see #setupRingtone(Context)
	 */
	private static Ringtone ringtone;
	/**
	 * Saved ringer volume.
	 *
	 * @see #startAlarm(Context, Address)
	 * @see #stopAlarm(Context, Address)
	 */
	private static int savedRingVolume;
	/**
	 * Saved ringer mode.
	 *
	 * @see #startAlarm(Context, Address)
	 * @see #stopAlarm(Context, Address)
	 */
	private static int savedRingerMode;

	/** Private constructor */
	private Heavy(){
		//do nothing
	}

	/**
	 * Convert a phone number type to a string
	 *
	 * @param context Context instance
	 * @param type phone number type
	 * @param label name of a custom phone type
	 * @return the phone number type
	 */
	private static @Nullable String phoneNumberType(final Context context, final int type, final @Nullable String label) {
		switch(type){
		case BaseTypes.TYPE_CUSTOM:
			return label;
		case Phone.TYPE_ASSISTANT:
			return context.getString(phone_numer_type_assistant);
		case Phone.TYPE_CALLBACK:
			return context.getString(phone_number_type_callback);
		case Phone.TYPE_CAR:
			return context.getString(phone_number_type_car);
		case Phone.TYPE_COMPANY_MAIN:
			return context.getString(phone_number_type_company_main);
		case Phone.TYPE_FAX_HOME:
			return context.getString(phone_number_type_home_fax);
		case Phone.TYPE_FAX_WORK:
			return context.getString(phone_number_type_work_fax);
		case Phone.TYPE_HOME:
			return context.getString(phone_number_type_home);
		case Phone.TYPE_ISDN:
			return context.getString(phone_number_type_isdn);
		case Phone.TYPE_MAIN:
			return context.getString(phone_number_type_main);
		case Phone.TYPE_MMS:
			return context.getString(phone_number_type_mms);
		case Phone.TYPE_MOBILE:
			return context.getString(phone_number_type_mobile);
		case Phone.TYPE_OTHER:
			return context.getString(phone_number_type_other);
		case Phone.TYPE_OTHER_FAX:
			return context.getString(phone_number_type_other_fax);
		case Phone.TYPE_PAGER:	
			return context.getString(phone_number_type_pager);
		case Phone.TYPE_RADIO:
			return context.getString(phone_number_type_radio);
		case Phone.TYPE_TELEX:
			return context.getString(phone_number_type_telex);
		case Phone.TYPE_TTY_TDD:
			return context.getString(phone_number_type_textphone);
		case Phone.TYPE_WORK:
			return context.getString(phone_number_type_work);
		case Phone.TYPE_WORK_MOBILE:
			return context.getString(phone_number_type_work_mobile);
		case Phone.TYPE_WORK_PAGER:
			return context.getString(phone_number_type_work_pager);
		}

		return context.getString(phone_number_type_unknown, Integer.valueOf(type));
	}

	/**
	 * Setup the ringtone used by the {@link Utils.Command#RING RING} command
	 *
	 * @param context Context
	 */
	private static void setupRingtone(final Context context){
		if(ringtone==null){//NOPMD not supposed to be thread-safe
			final Uri alert=RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
			ringtone=RingtoneManager.getRingtone(context, alert);
		}
	}

	/**
	 * Make the phone start ringing. Turns up the volume and sets the ringer mode to NORMAL 
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	private static void startAlarm(final Context context, final Address replyTo){
		Utils.registerOngoing(context, toNonNull(OngoingEvent.RING));
		final AudioManager man=(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
		savedRingerMode=man.getRingerMode();
		man.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
		savedRingVolume=man.getStreamVolume(AudioManager.STREAM_RING);
		man.setStreamVolume(AudioManager.STREAM_RING, man.getStreamMaxVolume(AudioManager.STREAM_RING), 0);
		Utils.sendMessage(context, replyTo, ringing);
		ringtone.play();
	}

	/**
	 * Get a camera instance.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	private static void startCamera(final Context context, final Address replyTo, final int cameraNumber){
		if(camera!=null)
			return;
		try{
			try{
				camera=Camera.open(cameraNumber);
			} catch (Exception ex){
				camera=Camera.open();
			}
		} catch (Exception e){
			Utils.sendMessage(context, replyTo, cannot_grab_camera);
		}
	}

	/**
	 * Make the phone stop ringing. Restores the volume and ringer mode.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	private static void stopAlarm(final Context context, final Address replyTo){
		Utils.unregisterOngoing(context, toNonNull(OngoingEvent.RING));
		final AudioManager man=(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
		Utils.sendMessage(context, replyTo, no_longer_ringing);
		ringtone.stop();
		man.setStreamVolume(AudioManager.STREAM_RING, savedRingVolume, 0);
		man.setRingerMode(savedRingerMode);
	}

	/**
	 * Release the previously grabbed camera instance
	 *
	 * @see #startCamera(Context, Address)
	 */
	private static void stopCamera(){
		if(camera==null)
			return;
		camera.release();
		camera=null;
	}

	/**
	 * Send battery status information to an Address
	 * 
	 * @param context Context instance
	 * @param replyTo destination Address
	 *
	 * @see #describeBatteryLevel(Context, Address, MessageType)
	 */
	public static void batt(final Context context, final Address replyTo){
		describeBatteryLevel(context, replyTo, null);
	}

	/**
	 * Show the bluetooth radio status.
	 *
	 * @param context Context instance
	 * @param replyTo destination Address
	 */
	public static void bluetooth(final Context context, final Address replyTo) {
		final BluetoothAdapter adapter=BluetoothAdapter.getDefaultAdapter();
		if(adapter==null){
			Utils.sendMessage(context, replyTo, no_bluetooth_adapter);
			return;
		}

		if(adapter.isEnabled())
			Utils.sendMessage(context, replyTo, bluetooth_on);
		else
			Utils.sendMessage(context, replyTo, bluetooth_off);
	}

	/**
	 * Set the bluetooth radio status.
	 *
	 * @param context Context instance
	 * @param replyTo destination Address
	 * @param on the requested radio status
	 */
	public static void bluetooth(final Context context, final Address replyTo, final boolean on){
		final BluetoothAdapter adapter=BluetoothAdapter.getDefaultAdapter();
		if(adapter==null){
			Utils.sendMessage(context, replyTo, no_bluetooth_adapter);
			return;
		}

		if(on) {
			adapter.enable();
			Utils.sendMessage(context, replyTo, enabling_bluetooth);
		}
		else {
			adapter.disable();
			Utils.sendMessage(context, replyTo, disabling_bluetooth);
		}
	}

	/**
	 * Cancel an ongoing event.
	 *
	 * @param context Context instance
	 * @param event the event to cancel
	 */
	public static void cancelOngoing(final Context context, final OngoingEvent event){
		switch(event){
		case LOCATION:
			nolocation(context, toNonNull(Address.BLACKHOLE));
			break;
		case RING:
			ring(context, toNonNull(Address.BLACKHOLE), false);
			break;
		}
	}

	/**
	 * Send the last calls to an Address.
	 *
	 * @param context Context instance
	 * @param replyTo destination Address
	 * @param numCalls how many calls to send
	 */
	public static void calllog(final Context context, final Address replyTo, final int numCalls) {
		final String[] fields = {
				Calls.TYPE, Calls.NUMBER, Calls.CACHED_NAME, Calls.DURATION, Calls.DATE
		};
		
		final Cursor cursor = context.getContentResolver().query(
				Calls.CONTENT_URI,
				fields,
				null,
				null,
				Calls.DATE + " DESC"
				);

		if (cursor.moveToFirst()) {
			do {
				final StringBuilder sb=new StringBuilder(50);//NOPMD different strings
				final int type=cursor.getInt(0);
				final String from=cursor.getString(1);

				switch(type){
				case Calls.INCOMING_TYPE:
					sb.append(context.getString(incoming_call_from, from));
					break;
				case Calls.MISSED_TYPE:
					sb.append(context.getString(missed_call_from, from));
					break;
				case Calls.OUTGOING_TYPE:
					sb.append(context.getString(outgoing_call_to, from));
					break;
				}

				if (cursor.getString(2) != null)
					sb.append('(').append(cursor.getString(2)).append(") ");

				sb.append(context.getString(duration_seconds_starting_at,
						Long.valueOf(cursor.getLong(3)),
						new Date(cursor.getLong(4))));

				Utils.sendMessage(context, replyTo, toNonNull(sb.toString()));
			} while (cursor.moveToNext() && cursor.getPosition() < numCalls);
		}

		cursor.close();
	}

	/**
	 * Search for contacts by name/nickname and send matching entries to an Address.
	 * 
	 * @param context Context instance
	 * @param replyTo destination Address
	 * @param name name/nickname part to search for
	 */
	@SuppressLint("StringFormatMatches")
	public static void contacts(final Context context, final Address replyTo, final String name){
		final Cursor cursor=context.getContentResolver().query(Uri.withAppendedPath(
				Contacts.CONTENT_FILTER_URI, name),
				new String[]{Contacts.DISPLAY_NAME, BaseColumns._ID, Contacts.LOOKUP_KEY},
				null, null, Contacts.DISPLAY_NAME);

		if(cursor.getCount()==0)
			Utils.sendMessage(context, replyTo, no_matching_contacts_found);

		while(cursor.moveToNext()){
			final String[] fields = {
					CommonDataKinds.Phone.NUMBER,
					CommonDataKinds.Phone.TYPE,
					CommonDataKinds.Phone.LABEL,
			};

			final Cursor inCursor=context.getContentResolver().query(Data.CONTENT_URI,
					fields,
					Data.CONTACT_ID+" = ? AND "+Data.MIMETYPE+ " = ?",
					new String[]{Long.toString(cursor.getLong(1)), CommonDataKinds.Phone.CONTENT_ITEM_TYPE},
					CommonDataKinds.Phone.LABEL);

			while(inCursor.moveToNext())
				Utils.sendMessage(context, replyTo, toNonNull(context.getString(contact_info,
						cursor.getString(0),
						inCursor.getString(0),
						phoneNumberType(context, inCursor.getInt(1), inCursor.getString(2)))));

			inCursor.close();
		}

		cursor.close();
	}

	/**
	 * Send battery status information to an Address or as a notification
	 *
	 * @param context Context instance
	 * @param replyTo Address to send the information to, if sending to a direct address. Null otherwise.
	 * @param type Notification type, if sending as a notification. Null otherwise.
	 */
	public static void describeBatteryLevel(final Context context, final @Nullable Address replyTo, final @Nullable MessageType type) {
		if(replyTo==null&&type==null)
			return;
		final Intent intent=context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
		if(intent==null)
			return;
		final double level=intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
		final int scale=intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
		final int plugged=intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0);
		final int status=intent.getIntExtra(BatteryManager.EXTRA_STATUS, BatteryManager.BATTERY_STATUS_UNKNOWN);
		final int temp=intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, 0);
		final int volt=intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, 0);

		final StringBuilder sb=new StringBuilder(100);
		sb.append(context.getString(battery_level, Double.valueOf(level*100/scale)));

		switch(plugged){
		case 0:
			sb.append(context.getString(not_plugged_in));
			break;
		case BatteryManager.BATTERY_PLUGGED_AC:
			sb.append(context.getString(plugged_in_ac));
			break;
		case BatteryManager.BATTERY_PLUGGED_USB:
			sb.append(context.getString(plugged_in_usb));
			break;
		case BatteryManager.BATTERY_PLUGGED_WIRELESS:
			sb.append(context.getString(plugged_in_wireless));
			break;
		}

		switch(status){
		case BatteryManager.BATTERY_STATUS_CHARGING:
			sb.append(context.getString(status_charging));
			break;
		case BatteryManager.BATTERY_STATUS_DISCHARGING:
			sb.append(context.getString(status_discharging));
			break;
		case BatteryManager.BATTERY_STATUS_FULL:
			sb.append(context.getString(status_full));
			break;
		case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
			sb.append(context.getString(status_not_charging));
			break;
		case BatteryManager.BATTERY_STATUS_UNKNOWN:
			sb.append(context.getString(status_unknown));
			break;
		}

		sb.append(context.getString(temperature, Integer.valueOf(temp)));

		sb.append(context.getString(voltage, Integer.valueOf(volt)));
		if(type==null)
			Utils.sendMessage(context, toNonNull(replyTo), toNonNull(sb.toString()));
		else
			Utils.sendMessage(context, type, toNonNull(sb.toString()));
	}

	/**
	 * Dial a phone number.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param nr phone number to dial
	 */
	public static void dial(final Context context, final Address replyTo, final String nr){
		final Intent intent=new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+nr));
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		final String name=Utils.callerId(context, nr);
		if(name==null)
			Utils.sendMessage(context, replyTo, dialing, nr);
		else
			Utils.sendMessage(context, replyTo, dialing, nr+" ("+name+")");
		context.startActivity(intent);
	}

	/**
	 * Show a dialog with a message and a list of buttons.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param message dialog message
	 * @param buttons dialog buttons
	 */
	public static void dialog(final Context context, final Address replyTo, final String message, final String[] buttons){
		final Intent intent=new Intent(context, DialogActivity.class);
		intent.putExtra(DialogActivity.EXTRA_MESSAGE, message);
		intent.putExtra(DialogActivity.EXTRA_BUTTONS, buttons);
		intent.putExtra(DialogActivity.EXTRA_REPLYTO, replyTo.toString());
		intent.addFlags(
				Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS|
				Intent.FLAG_ACTIVITY_NEW_TASK|
				Intent.FLAG_ACTIVITY_NO_USER_ACTION|
				Intent.FLAG_FROM_BACKGROUND);
		Utils.sendMessage(context, toNonNull(replyTo), showing_dialog);
		context.startActivity(intent);
	}

	/**
	 * Turns the flashlight on or off.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param on requested flashlight state
	 */
	public static void flash(final Context context, final Address replyTo, final boolean on){
		startCamera(context, replyTo, 0);
		if(camera==null)
			return;
		final Camera.Parameters parms=camera.getParameters();
		if(on){
			parms.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
			camera.setParameters(parms);
		} else {
			parms.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
			camera.setParameters(parms);
			stopCamera();
		}
	}

	/**
	 * Start sending location updates to an Address.
	 *
	 * @param context Context instance
	 * @param replyTo destination Address
	 * @param provider LocationProvider
	 * @param minTime minimum time between two consecutive updates (in ms)
	 * @param minDistance minimum distance between two consecutive updates (in meters)
	 *
	 * @see LocationManager#requestLocationUpdates(String, long, float, LocationListener)
	 */
	public static void location(final Context context, final Address replyTo, final String provider,final long minTime,final float minDistance){
		final LocationManager man=(LocationManager) context.getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
		if(locationListener!=null)
			nolocation(context, toNonNull(Address.BLACKHOLE));
		Utils.registerOngoing(context, toNonNull(OngoingEvent.LOCATION));
		locationListener=new FonBotLocationListener(context, replyTo);
		man.removeUpdates(locationListener);
		final Location lastKnownLocation=man.getLastKnownLocation(provider);
		if(lastKnownLocation!=null){
			Utils.sendMessage(context, replyTo, last_known_location);
			locationListener.onLocationChanged(lastKnownLocation);
		}
		Utils.sendMessage(context, replyTo, listening_for_location_updates);
		man.requestLocationUpdates(provider, minTime, minDistance, locationListener);
	}

	/**
	 * Lock the phone.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void lock(final Context context, final Address replyTo) {
		final DevicePolicyManager dpm=(DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);
		dpm.lockNow();
		Utils.sendMessage(context, replyTo, device_locked);
	}

	/**
	 * Send a command to a running instance of the music player
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param command command to send
	 */
	public static void musicPlayerCommand(final Context context, final Address replyTo, final String command) {
		final Intent intent=new Intent("com.android.music.musicservicecommand");
		intent.putExtra("command", command);
		context.sendBroadcast(intent);
		Utils.sendMessage(context, replyTo, command_sent);
	}

	/**
	 * Send a file to a server.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param filename file to send
	 * @param hostname server hostname
	 * @param port server port
	 */
	public static void ncfile(final Context context, final Address replyTo, final String filename,final String hostname,final int port){
		new NcfileExecutableRunnable(context, replyTo, filename, hostname, port).execute();
	}

	/**
	 * Stop sending location updates.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void nolocation(final Context context, final Address replyTo){
		Utils.unregisterOngoing(context, toNonNull(OngoingEvent.LOCATION));
		final LocationManager man=(LocationManager) context.getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
		man.removeUpdates(locationListener);
		locationListener=null;
		Utils.sendMessage(context, replyTo, no_longer_listening_for_location_updates);
	}

	/**
	 * Take a photo and send it to a server.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param cameraNumber camera to take photo with
	 * @param hostname server hostname
	 * @param port server port
	 */
	public static void photo(final Context context, final Address replyTo, final int cameraNumber, final String hostname, final int port){
		startCamera(context, replyTo, cameraNumber);
		if(camera==null)
			return;
		final Camera.Parameters parms=camera.getParameters();
		parms.setJpegQuality(70);
		parms.setPictureFormat(ImageFormat.JPEG);
		camera.setParameters(parms);

		final SurfaceView fakeView=new SurfaceView(context);
		try {
			camera.setPreviewDisplay(fakeView.getHolder());
		} catch (IOException e) {
			Utils.sendMessage(context, replyTo, error_setting_preview_display);
			return;
		}
		camera.startPreview();
		final Handler handler=new Handler();

		new Thread(new Runnable() {
			@Override
			public void run() {
				SystemClock.sleep(2000);

				handler.post(new Runnable() {
					@Override
					public void run() {
						try {
							camera.takePicture(null, null, new FonBotPictureCallback(context, replyTo, hostname, port));
						} catch(Exception e){
							Utils.sendMessage(context, replyTo, error_while_processing_command, e.getClass().getName(), e.getMessage());
						}
					}
				});
			}
		}).start();
	}

	/**
	 * Send a directory listing to an Address
	 *
	 * @param context Context instance
	 * @param replyTo destination Address
	 * @param directory directory to list
	 */
	public static void ls(final Context context, final Address replyTo, final String directory) {
		final File[] files=new File(directory).listFiles();
		if(files==null){
			Utils.sendMessage(context, replyTo, string_is_not_a_directory, directory);
			return;
		}

		final StringBuilder sb=new StringBuilder(context.getString(files_in_directory,directory));
		for(final File file : files){
			sb.append(file.getName());
			if(file.isDirectory())
				sb.append('/');
			sb.append(" ");
		}

		Utils.sendMessage(context, replyTo, toNonNull(sb.toString()));
	}

	/**
	 * Make the phone start ringing if it is not ringing or stop ringing if it is.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void ring(final Context context, final Address replyTo){
		setupRingtone(context);
		if(ringtone==null){
			Utils.sendMessage(context, replyTo, no_ringtone_found);
			return;
		}
		if(ringtone.isPlaying())
			stopAlarm(context, replyTo);
		else
			startAlarm(context, replyTo);
	}

	/**
	 * Make the phone start/stop ringing.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param on true if the phone should start ringing, false otherwise
	 */
	public static void ring(final Context context, final Address replyTo, final boolean on){
		setupRingtone(context);
		if(ringtone==null){
			Utils.sendMessage(context, replyTo, no_ringtone_found);
			return;
		}
		if(on&&!ringtone.isPlaying())
			startAlarm(context, replyTo);
		else if(ringtone.isPlaying()&&!on)
			stopAlarm(context, replyTo);
	}

	/**
	 * Send the current ringer mode to an Address
	 *
	 * @param context Context instance
	 * @param replyTo destination Address
	 */
	public static void ringer(final Context context, final Address replyTo){
		final AudioManager man=(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
		switch(man.getRingerMode()){
		case AudioManager.RINGER_MODE_NORMAL:
			Utils.sendMessage(context, replyTo, ringer_mode_normal);
			break;
		case AudioManager.RINGER_MODE_VIBRATE:
			Utils.sendMessage(context, replyTo, ringer_mode_vibrate);
			break;
		case AudioManager.RINGER_MODE_SILENT:
			Utils.sendMessage(context, replyTo, ringer_mode_silent);
			break;
		default:
			Utils.sendMessage(context, replyTo, unknown_ringer_mode);
		}
	}

	/**
	 * Set the ringer mode.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param ringerMode requested ringer mode
	 *
	 * @see Utils.RingerMode
	 */
	public static void ringer(final Context context, final Address replyTo, final int ringerMode){
		final AudioManager man=(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
		man.setRingerMode(ringerMode);
		ringer(context, replyTo);
	}

	/**
	 * Remove a file or empty directory.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param filename file/empty directory to delete
	 */
	public static void rm(final Context context, final Address replyTo, final String filename){
		if(new File(filename).delete())
			Utils.sendMessage(context, replyTo, file_deleted);
		else
			Utils.sendMessage(context, replyTo, error_while_deleting_file);
	}

	/**
	 * Clear the keyguard password.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @throws SecurityException if FonBot does not have device administration permissions 
	 */
	public static void setPassword(final Context context, final Address replyTo) throws SecurityException{
		final DevicePolicyManager dpm=(DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);

		dpm.resetPassword("", 0);
		Utils.sendMessage(context, replyTo, password_cleared);
	}

	/**
	 * Change the keyguard password.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param password new password
	 * @throws SecurityException if FonBot does not have device administration permissions
	 */
	public static void setPassword(final Context context, final Address replyTo, final String password) throws SecurityException{
		final DevicePolicyManager dpm=(DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);

		dpm.resetPassword(password, 0);
		Utils.sendMessage(context, replyTo, password_set);
	}

	/**
	 * Send a text message.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param destination destination phone number
	 * @param text text message contents
	 */
	public static void sms(final Context context, final Address replyTo, final String destination, final String text){
		final SmsManager manager=SmsManager.getDefault();
		final ArrayList<String> messages=manager.divideMessage(text);
		if(messages.size() > 1)
			Utils.sendMessage(context, replyTo, message_was_split_into_parts, Integer.valueOf(messages.size()));

		final ArrayList<PendingIntent> sents=new ArrayList<PendingIntent>(messages.size());
		final ArrayList<PendingIntent> delivereds=new ArrayList<PendingIntent>(messages.size());

		final String name=Utils.callerId(context, destination);
		final String fullDestination;
		if(name==null)
			fullDestination=destination;
		else
			fullDestination=destination+" ("+name+")";

		for(int i=0;i<messages.size();i++){
			final Intent sent=new Intent(context,SmsStatusReceiver.class);
			sent.putExtra(SmsStatusReceiver.EXTRA_DESTINATION, fullDestination);
			sent.putExtra(SmsStatusReceiver.EXTRA_PART, i+1);
			sent.putExtra(SmsStatusReceiver.EXTRA_TOTAL, messages.size());
			sent.putExtra(SmsStatusReceiver.EXTRA_REPLY_TO, replyTo.toString());
			sent.setAction(SmsStatusReceiver.SENT_ACTION+i);//actions must be unique
			sents.add(PendingIntent.getBroadcast(context, 0, sent, PendingIntent.FLAG_UPDATE_CURRENT));

			final Intent delivered=new Intent(context, SmsStatusReceiver.class);
			delivered.putExtra(SmsStatusReceiver.EXTRA_DESTINATION, fullDestination);
			delivered.putExtra(SmsStatusReceiver.EXTRA_PART, i+1);
			delivered.putExtra(SmsStatusReceiver.EXTRA_TOTAL, messages.size());
			delivered.putExtra(SmsStatusReceiver.EXTRA_REPLY_TO, replyTo.toString());
			delivered.setAction(SmsStatusReceiver.DELIVERED_ACTION+i);//actions must be unique
			delivereds.add(PendingIntent.getBroadcast(context, 0, delivered, PendingIntent.FLAG_UPDATE_CURRENT));
		}

		Log.d(Heavy.class.getName(), "Sending sms to "+destination);
		manager.sendMultipartTextMessage(destination, null, messages, sents, delivereds);
	}

	/**
	 * Send the last SMSes to an Address.
	 *
	 * @param context Context instance
	 * @param replyTo destination Address
	 * @param numSms how many SMSes to send
	 */
	public static void smslog(final Context context, final Address replyTo, final int numSms) {
		final String[] fields = {"type","address", "body", "date"};

		final Cursor cursor = context.getContentResolver().query (
				Uri.parse("content://sms"),
				fields,
				null,
				null,
				"date DESC"
				);

		if (cursor.moveToFirst()) {
			do {
				final String fromNumber=cursor.getString(1);
				final String from;
				final String name=Utils.callerId(context, Utils.toNonNull(fromNumber));
				if(name==null)
					from=fromNumber;
				else
					from=fromNumber+" ("+name+')';
				final String message=cursor.getString(2).replace("\n", "\n                             ");
				final Date date=new Date(cursor.getLong(3));

				if(cursor.getInt(0)==1)
					Utils.sendMessage(context, replyTo, incoming_message, from, message, date);
				else
					Utils.sendMessage(context, replyTo, outgoing_message, from, message, date);
			} while (cursor.moveToNext() && cursor.getPosition() < numSms);
		}

		cursor.close();
	}

	/** TTS instance, only used by {@link #speak(Context, Address, String)} */ 
	private static TextToSpeech tts;

	/**
	 * Speak a String using the text-to-speech engine.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param text text to speak
	 */
	public static void speak(final Context context, final Address replyTo, final String text){
		tts=new TextToSpeech(context, new OnInitListener() {
			@Override
			public void onInit(final int status) {
				if(status==TextToSpeech.SUCCESS){
					Utils.sendMessage(context, replyTo, speaking);
					tts.speak(text, TextToSpeech.QUEUE_ADD, null);
				} else
					Utils.sendMessage(context, replyTo, tts_engine_not_available);
			}
		});
	}

	/**
	 * Show a toast notification with the default duration.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param text toast text
	 */
	public static void toast(final Context context, final Address replyTo, final String text){
		toast(context, replyTo, text, Toast.LENGTH_SHORT);
	}

	/**
	 * Show a toast notification.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param text toast text
	 * @param duration toast duration
	 */
	public static void toast(final Context context, final Address replyTo, final String text, final int duration){
		Toast.makeText(context,text,duration).show();
		Utils.sendMessage(context, replyTo, toast_shown);
	}

	/**
	 * Make the phone vibrate for a number of milliseconds.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param ms vibrate duration, in milliseconds
	 */
	public static void vibrate(final Context context, final Address replyTo, final long ms){
		final Vibrator v=(Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
		Utils.sendMessage(context, replyTo, vibrating);
		v.vibrate(ms);
	}

	/**
	 * View an URI in an appropriate activity.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param uri URI to view
	 */
	public static void view(final Context context, final Address replyTo, final Uri uri) {
		try{
			final Intent intent=new Intent(Intent.ACTION_VIEW);
			intent.setData(uri);
			intent.setFlags(Intent.FLAG_FROM_BACKGROUND|Intent.FLAG_ACTIVITY_NEW_TASK);
			context.startActivity(intent);
			Utils.sendMessage(context, replyTo, url_opened);
		} catch(ActivityNotFoundException e){
			Utils.sendMessage(context, replyTo, no_activity_found_for_this_url);
		} catch(Exception e){
			Utils.sendMessage(context, replyTo, invalid_url);
		}
	}

	/**
	 * Get the current WiFi state.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void wifi(final Context context, final Address replyTo){
		final WifiManager man=(WifiManager) context.getSystemService(Context.WIFI_SERVICE);
		if(man.isWifiEnabled())
			Utils.sendMessage(context, replyTo, wifi_on);
		else
			Utils.sendMessage(context, replyTo, wifi_off);
	}

	/**
	 * Set the WiFi state.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param on the requested WiFi state
	 */
	public static void wifi(final Context context, final Address replyTo, final boolean on){
		final WifiManager man=(WifiManager) context.getSystemService(Context.WIFI_SERVICE);
		man.setWifiEnabled(on);
		if(on)
			Utils.sendMessage(context, replyTo, enabling_wifi);
		else
			Utils.sendMessage(context, replyTo, disabling_wifi);
	}

	/**
	 * Factory reset the phone, optionally deleting the SD card too.
	 *
	 * @param context Context instance
	 * @param type {@link Utils.WipeType} instance
	 * @throws SecurityException if FonBot does not have device administration permissions
	 */
	@SuppressLint("InlinedApi")
	public static void wipe(final Context context, final WipeType type) throws SecurityException{
		final DevicePolicyManager dpm=(DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);

		switch(type){
		case DATA:
			dpm.wipeData(0);
			break;
		case FULL:
			dpm.wipeData(DevicePolicyManager.WIPE_EXTERNAL_STORAGE);
			break;
		}
	}

	/**
	 * Disable a Command. The command cannot be used until enabled again with the {@link Utils.Command#ENABLE ENABLE} command.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param command Command to disable
	 */
	public static void disable(final Context context, final Address replyTo, final Command command){
		PreferenceManager.getDefaultSharedPreferences(context).edit()
		.putBoolean(command+"disabled", true).commit();
		Utils.sendMessage(context, replyTo, command_disabled, command);
	}

	/**
	 * Re-enable a disabled Command.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param command Command to re-enable
	 */
	public static void enable(final Context context, final Address replyTo, final Command command){
		PreferenceManager.getDefaultSharedPreferences(context).edit()
		.remove(command+"disabled").commit();
		Utils.sendMessage(context, replyTo, command_enabled, command);

	}

	/**
	 * Check whether a Command is disabled.
	 *
	 * @param context Context instance
	 * @param command Command to check
	 * @return true if the Command is disabled, false otherwise
	 */
	public static boolean isCommandDisabled(final Context context, final Command command){
		return PreferenceManager.getDefaultSharedPreferences(context).getBoolean(command+"disabled", false);
	}

	/**
	 * Poll the server for pending commands.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void poll(final Context context, final Address replyTo) {
		Utils.sendMessage(context, replyTo, polling_server);
		context.startService(new Intent(context, FonBotMainService.class));
	}

	/**
	 * Get an instance of {@link ITelephony}
	 *
	 * @param context Context instance
	 * @return an instance of {@link ITelephony}
	 * @throws NoSuchMethodException thrown by reflection
	 * @throws IllegalArgumentException thrown by reflection
	 * @throws IllegalAccessException thrown by reflection
	 * @throws InvocationTargetException thrown by reflection
	 */
	private static ITelephony getITelephony(final Context context) throws NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException{
		final TelephonyManager man=(TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
		final Method m=TelephonyManager.class.getDeclaredMethod("getITelephony");
		m.setAccessible(true);
		return toNonNull((ITelephony) m.invoke(man));
	}

	/**
	 * Hang up the phone.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void hangup(final Context context, final Address replyTo){
		try{
			getITelephony(context).endCall();
		} catch(Exception e){
			Utils.sendMessage(context, replyTo, exception_while_hanging_up_call,
					e.getClass().getName(), e.getMessage());
		}
	}

	/**
	 * Answer the phone if it is ringing.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void answer(final Context context, final Address replyTo){
		try{
			getITelephony(context).answerRingingCall();
		} catch(Exception e){
			Utils.sendMessage(context, replyTo, exception_while_answering_call,
					e.getClass().getName(), e.getMessage());
		}
	}

	/**
	 * Launch a package.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param pkg name of the package to launch 
	 */
	public static void launch(final Context context, final Address replyTo, final String pkg){
		final Intent intent=context.getPackageManager().getLaunchIntentForPackage(pkg);
		if(intent==null){
			Utils.sendMessage(context, replyTo, no_such_package);
			return;
		}
		context.startActivity(intent);
		Utils.sendMessage(context, replyTo, app_launched);
	}

	/**
	 * Get the mobile data enabled status.
	 * 
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void data(final Context context, final Address replyTo){
		try{
			final ConnectivityManager man=(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
			final Method m=ConnectivityManager.class.getDeclaredMethod("getMobileDataEnabled");
			m.setAccessible(true);
			if(((Boolean)m.invoke(man)).booleanValue())
				Utils.sendMessage(context, replyTo, data_on);
			else
				Utils.sendMessage(context, replyTo, data_off);
		} catch(Exception e){
			Utils.sendMessage(context, replyTo, exception_while_determining_data_state,
					e.getClass().getName(), e.getMessage());
		}
	}

	/**
	 * Set the mobile data enabled status.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param enable whether to enable mobile data
	 */
	public static void data(final Context context, final Address replyTo, final boolean enable) {
		try{
			if(enable){
				getITelephony(context).enableDataConnectivity();
				Utils.sendMessage(context, replyTo, enabling_data);
			} else {
				getITelephony(context).disableDataConnectivity();
				Utils.sendMessage(context, replyTo, disabling_data);
			}
		} catch(Exception e){
			Utils.sendMessage(context, replyTo, exception_while_getting_itelephony,
					e.getClass().getName(), e.getMessage());
		}
	}

	/**
	 * Get the GPS status.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void gps(final Context context, final Address replyTo){
		if(Secure.isLocationProviderEnabled(context.getContentResolver(), LocationManager.GPS_PROVIDER))
			Utils.sendMessage(context, replyTo, gps_on);
		else
			Utils.sendMessage(context, replyTo, gps_off);
	}

	/**
	 * Set the GPS status.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param enabled requested GPS status
	 */
	public static void gps(final Context context, final Address replyTo, final boolean enabled) {
		Secure.setLocationProviderEnabled(context.getContentResolver(), LocationManager.GPS_PROVIDER, enabled);
		if(enabled)
			Utils.sendMessage(context, replyTo, enabling_gps);
		else
			Utils.sendMessage(context, replyTo, disabling_gps);
	}

	/**
	 * Get the Google location (aka network location) state.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void glocation(final Context context, final Address replyTo){
		if(Secure.isLocationProviderEnabled(context.getContentResolver(), LocationManager.NETWORK_PROVIDER))
			Utils.sendMessage(context, replyTo, network_location_on);
		else
			Utils.sendMessage(context, replyTo, network_location_off);
	}

	/**
	 * Set the Google location (aka network location) state.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param enabled requested Google location state
	 */
	public static void glocation(final Context context, final Address replyTo, final boolean enabled) {
		Secure.setLocationProviderEnabled(context.getContentResolver(), LocationManager.NETWORK_PROVIDER, enabled);
		if(enabled)
			Utils.sendMessage(context, replyTo, enabling_network_location);
		else
			Utils.sendMessage(context, replyTo, disabling_network_location);
	}

	/**
	 * Reboot the phone.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param reason reboot reason
	 *
	 * @see PowerManager#reboot(String)
	 */
	public static void reboot(final Context context, final Address replyTo, final @Nullable String reason) {
		final PowerManager pm=(PowerManager) context.getSystemService(Context.POWER_SERVICE);
		Utils.sendMessage(context, replyTo, rebooting);	
		pm.reboot(reason);
	}

	/**
	 * Cancel a notification.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param id notification ID 
	 */
	public static void notify(final Context context, final Address replyTo, final int id) {
		final NotificationManager man=(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
		man.cancel(id);
		Utils.sendMessage(context, replyTo, notification_canceled);
	}

	/**
	 * Show a notification.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param id notification ID
	 * @param title notificationO title
	 * @param text notification text
	 */
	public static void notify(final Context context, final Address replyTo, final int id, final String title, final String text) {
		final NotificationManager man=(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
		man.notify(id, new NotificationCompat.Builder(context).
				setContentTitle(title).
				setContentText(text).
				setSmallIcon(android.R.drawable.stat_notify_sync_noanim).
				build());
		Utils.sendMessage(context, replyTo, notification_shown);
	}

	/**
	 * Take a screen capture. Uses the screencap utility and requires root.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param filename capture file location
	 */
	public static void screencap(final Context context, final Address replyTo, final String filename){
		new Thread(new ScreencapRunnable(context, replyTo, filename)).start();
	}

	/**
	 * Toggle the torch state using the Torch (net.cactii.torch2) app.
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 */
	public static void torch(final Context context, final Address replyTo){
		context.sendBroadcast(new Intent("net.cactii.flash2.TOGGLE_FLASHLIGHT"));
		Utils.sendMessage(context, replyTo, toggling_torch_state);
	}

	/**
	 * Download a file from a given URL to a given filename
	 *
	 * @param context Context instance
	 * @param replyTo reply Address
	 * @param filename filename to save to
	 * @param hostname hostname to download from
	 * @param port port to download from
	 */
	public static void getfile(final Context context, final Address replyTo, final String filename, final String hostname, final int port){
		new GetfileExecutableRunnable(context, replyTo, filename, hostname, port).execute();
	}
}