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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.wearable.elizachat;
     18 
     19 import android.app.Notification;
     20 import android.app.PendingIntent;
     21 import android.app.Service;
     22 import android.content.Intent;
     23 import android.graphics.BitmapFactory;
     24 import android.os.Bundle;
     25 import android.os.IBinder;
     26 import android.support.v4.app.NotificationCompat;
     27 import android.support.v4.app.RemoteInput;
     28 import android.support.v4.content.LocalBroadcastManager;
     29 import android.support.v4.app.NotificationManagerCompat;
     30 import android.text.TextUtils;
     31 import android.util.Log;
     32 
     33 /**
     34  * A service that runs in the background and provides responses to the incoming messages from the
     35  * wearable. It also keeps a record of the chat session history, which it can provide upon request.
     36  */
     37 public class ResponderService extends Service {
     38 
     39     public static final String ACTION_INCOMING = "com.example.android.wearable.elizachat.INCOMING";
     40 
     41     public static final String ACTION_RESPONSE = "com.example.android.wearable.elizachat.REPLY";
     42 
     43     public static final String EXTRA_REPLY = "reply";
     44 
     45     private static final String TAG = "ResponderService";
     46 
     47     private ElizaResponder mResponder;
     48 
     49     private String mLastResponse = null;
     50 
     51     private StringBuffer mCompleteConversation = new StringBuffer();
     52 
     53     private LocalBroadcastManager mBroadcastManager;
     54 
     55     @Override
     56     public void onCreate() {
     57         super.onCreate();
     58         if (Log.isLoggable(TAG, Log.DEBUG)) {
     59             Log.d(TAG, "Chat Service started");
     60         }
     61         mResponder = new ElizaResponder();
     62         mBroadcastManager = LocalBroadcastManager.getInstance(this);
     63         processIncoming(null);
     64     }
     65 
     66     @Override
     67     public IBinder onBind(Intent intent) {
     68         return null;
     69     }
     70 
     71     @Override
     72     public int onStartCommand(Intent intent, int flags, int startId) {
     73         if (null == intent || null == intent.getAction()) {
     74             return Service.START_STICKY;
     75         }
     76         String action = intent.getAction();
     77         if (action.equals(ACTION_RESPONSE)) {
     78             Bundle remoteInputResults = RemoteInput.getResultsFromIntent(intent);
     79             CharSequence replyMessage = "";
     80             if (remoteInputResults != null) {
     81                 replyMessage = remoteInputResults.getCharSequence(EXTRA_REPLY);
     82             }
     83             processIncoming(replyMessage.toString());
     84         } else if (action.equals(MainActivity.ACTION_GET_CONVERSATION)) {
     85             broadcastMessage(mCompleteConversation.toString());
     86         }
     87         return Service.START_STICKY;
     88     }
     89 
     90     private void showNotification() {
     91         if (Log.isLoggable(TAG, Log.DEBUG)) {
     92             Log.d(TAG, "Sent: " + mLastResponse);
     93         }
     94         NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
     95                 .setContentTitle(getString(R.string.eliza))
     96                 .setContentText(mLastResponse)
     97                 .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.bg_eliza))
     98                 .setSmallIcon(R.drawable.bg_eliza)
     99                 .setPriority(NotificationCompat.PRIORITY_DEFAULT);
    100 
    101         Intent intent = new Intent(ACTION_RESPONSE);
    102         PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent,
    103                 PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_CANCEL_CURRENT);
    104         Notification notification = builder
    105                 .extend(new NotificationCompat.WearableExtender()
    106                         .addAction(new NotificationCompat.Action.Builder(
    107                                 R.drawable.ic_full_reply, getString(R.string.reply), pendingIntent)
    108                                 .addRemoteInput(new RemoteInput.Builder(EXTRA_REPLY)
    109                                         .setLabel(getString(R.string.reply))
    110                                         .build())
    111                                 .build()))
    112                 .build();
    113         NotificationManagerCompat.from(this).notify(0, notification);
    114     }
    115 
    116     private void processIncoming(String text) {
    117         if (Log.isLoggable(TAG, Log.DEBUG)) {
    118             Log.d(TAG, "Received: " + text);
    119         }
    120         mLastResponse = mResponder.elzTalk(text);
    121         String line = TextUtils.isEmpty(text) ? mLastResponse : text + "\n" + mLastResponse;
    122 
    123         // Send a new line of conversation to update the Activity, unless the incoming text was
    124         // empty.
    125         if (!TextUtils.isEmpty(text)) {
    126             broadcastMessage(line);
    127         }
    128         NotificationManagerCompat.from(this).cancelAll();
    129         showNotification();
    130         mCompleteConversation.append("\n" + line);
    131     }
    132 
    133     private void broadcastMessage(String message) {
    134         Intent intent = new Intent(MainActivity.ACTION_NOTIFY);
    135         intent.putExtra(MainActivity.EXTRA_MESSAGE, message);
    136         mBroadcastManager.sendBroadcast(intent);
    137     }
    138 
    139     @Override
    140     public void onDestroy() {
    141         if (Log.isLoggable(TAG, Log.DEBUG)) {
    142             Log.d(TAG, "Chat Service stopped");
    143         }
    144         NotificationManagerCompat.from(this).cancel(0);
    145         mBroadcastManager = null;
    146         super.onDestroy();
    147     }
    148 }
    149