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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package org.libreoffice.impressremote.communication;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.support.v4.content.LocalBroadcastManager;
import org.libreoffice.impressremote.util.BluetoothOperator;
import org.libreoffice.impressremote.util.Intents;
class BluetoothServersFinder extends BroadcastReceiver implements ServersFinder, Runnable {
private static final int SEARCH_DELAY_IN_SECONDS = 5;
private final Context mContext;
private final Map<String, Server> mServers;
public BluetoothServersFinder(Context aContext) {
mContext = aContext;
mServers = new HashMap<String, Server>();
}
@Override
public void startSearch() {
if (!BluetoothOperator.isAvailable()) {
return;
}
if (BluetoothOperator.getAdapter().isDiscovering()) {
return;
}
setUpBluetoothActionsReceiver();
if (!BluetoothOperator.getAdapter().isEnabled()) {
return;
}
BluetoothOperator.getAdapter().startDiscovery();
}
private void setUpBluetoothActionsReceiver() {
IntentFilter aBluetoothActionsFilter = new IntentFilter();
aBluetoothActionsFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
aBluetoothActionsFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
aBluetoothActionsFilter.addAction(BluetoothDevice.ACTION_FOUND);
mContext.registerReceiver(this, aBluetoothActionsFilter);
}
@Override
public void onReceive(Context aContext, Intent aIntent) {
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(aIntent.getAction())) {
switch (aIntent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0)) {
case BluetoothAdapter.STATE_ON: {
BluetoothOperator.getAdapter().startDiscovery();
Intent aNewIntent = Intents.buildBluetoothStateChangedIntent();
LocalBroadcastManager.getInstance(mContext).sendBroadcast(aNewIntent);
return;
}
case BluetoothAdapter.STATE_OFF: {
mServers.clear();
Intent aNewIntent = Intents.buildBluetoothStateChangedIntent();
LocalBroadcastManager.getInstance(mContext).sendBroadcast(aNewIntent);
return;
}
default:
return;
}
}
if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(aIntent.getAction())) {
startDiscoveryDelayed();
return;
}
if (BluetoothDevice.ACTION_FOUND.equals(aIntent.getAction())) {
BluetoothDevice aBluetoothDevice = aIntent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
addServer(buildServer(aBluetoothDevice));
callUpdatingServersList();
}
}
private void startDiscoveryDelayed() {
// Start discovery again after a small delay.
// Check whether device is on in case the user manually
// disabled Bluetooth.
if (!BluetoothOperator.getAdapter().isEnabled()) {
return;
}
Handler aDiscoveryHandler = new Handler();
aDiscoveryHandler.postDelayed(this, TimeUnit.SECONDS.toMillis(SEARCH_DELAY_IN_SECONDS));
}
@Override
public void run() {
BluetoothOperator.getAdapter().startDiscovery();
}
private void addServer(Server aServer) {
mServers.put(aServer.getAddress(), aServer);
}
private Server buildServer(BluetoothDevice aBluetoothDevice) {
Server.Type aServerType = buildServerType(aBluetoothDevice);
String aServerAddress = aBluetoothDevice.getAddress();
String aServerName = aBluetoothDevice.getName();
return Server.newBluetoothInstance(aServerType, aServerAddress, aServerName);
}
private Server.Type buildServerType(BluetoothDevice aBluetoothDevice) {
int aBluetoothClass = aBluetoothDevice.getBluetoothClass().getMajorDeviceClass();
switch (aBluetoothClass) {
case BluetoothClass.Device.Major.COMPUTER:
return Server.Type.COMPUTER;
case BluetoothClass.Device.Major.PHONE:
return Server.Type.PHONE;
default:
return Server.Type.UNDEFINED;
}
}
private void callUpdatingServersList() {
Intent aIntent = Intents.buildServersListChangedIntent();
LocalBroadcastManager.getInstance(mContext).sendBroadcast(aIntent);
}
@Override
public void stopSearch() {
if (!BluetoothOperator.isAvailable()) {
return;
}
tearDownBluetoothActionsReceiver();
BluetoothOperator.getAdapter().cancelDiscovery();
}
private void tearDownBluetoothActionsReceiver() {
try {
mContext.unregisterReceiver(this);
} catch (IllegalArgumentException e) {
// Receiver not registered.
// Fixed in Honeycomb: Android’s issue #6191.
}
}
@Override
public List<Server> getServers() {
return new ArrayList<Server>(mServers.values());
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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