| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 com.android.server.telecom.testapps; |
| |
| import android.content.Context; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.ParcelFileDescriptor; |
| import android.telecom.Connection; |
| import android.telecom.Log; |
| |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.OutputStreamWriter; |
| import java.util.Random; |
| |
| public class RttChatbot { |
| private static final String LOG_TAG = RttChatbot.class.getSimpleName(); |
| private static final long PER_CHARACTER_DELAY_MS = 100; |
| private static final long MSG_WAIT_DELAY_MS = 3999; |
| private static final double ONE_LINER_FREQUENCY = 0.1; |
| private static final String REPLY_PREFIX = "You said: "; |
| |
| private static final int BEGIN_SEND_REPLY_MESSAGE = 1; |
| private static final int SEND_CHARACTER = 2; |
| private static final int APPEND_TO_INPUT_BUFFER = 3; |
| |
| private final Connection.RttTextStream mRttTextStream; |
| private final Random mRandom = new Random(); |
| private final String[] mOneLiners; |
| private Handler mHandler; |
| private HandlerThread mSenderThread; |
| private Thread mReceiverThread; |
| |
| private final class ReplyHandler extends Handler { |
| private StringBuilder mInputSoFar; |
| |
| public ReplyHandler(Looper looper) { |
| super(looper); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case BEGIN_SEND_REPLY_MESSAGE: |
| removeMessages(SEND_CHARACTER); |
| sendReplyMessage(); |
| break; |
| case SEND_CHARACTER: |
| try { |
| mRttTextStream.write((String) msg.obj); |
| } catch (IOException e) { |
| } |
| break; |
| case APPEND_TO_INPUT_BUFFER: |
| removeMessages(BEGIN_SEND_REPLY_MESSAGE); |
| sendEmptyMessageDelayed(BEGIN_SEND_REPLY_MESSAGE, MSG_WAIT_DELAY_MS); |
| String toAppend = (String) msg.obj; |
| if (mInputSoFar == null) { |
| mInputSoFar = new StringBuilder(toAppend); |
| } else { |
| mInputSoFar.append(toAppend); |
| } |
| Log.d(LOG_TAG, "Got %s to append, total text now %s", |
| toAppend, mInputSoFar.toString()); |
| break; |
| } |
| } |
| |
| private void sendReplyMessage() { |
| String messageToSend; |
| if (mRandom.nextDouble() < ONE_LINER_FREQUENCY) { |
| messageToSend = mOneLiners[mRandom.nextInt(mOneLiners.length)]; |
| } else { |
| messageToSend = REPLY_PREFIX + mInputSoFar.toString(); |
| } |
| mInputSoFar = null; |
| Log.i(LOG_TAG, "Begin send reply message: %s", messageToSend); |
| int[] charsToSend = messageToSend.codePoints().toArray(); |
| for (int i = 0; i < charsToSend.length; i++) { |
| Message msg = obtainMessage(SEND_CHARACTER, |
| new String(new int[] {charsToSend[i]}, 0, 1)); |
| sendMessageDelayed(msg, PER_CHARACTER_DELAY_MS * i); |
| } |
| } |
| } |
| |
| public RttChatbot(Context context, Connection.RttTextStream textStream) { |
| mOneLiners = context.getResources().getStringArray(R.array.rtt_reply_one_liners); |
| mRttTextStream = textStream; |
| } |
| |
| public void start() { |
| Log.i(LOG_TAG, "Starting RTT chatbot."); |
| HandlerThread ht = new HandlerThread("RttChatbotSender"); |
| ht.start(); |
| mSenderThread = ht; |
| mHandler = new ReplyHandler(ht.getLooper()); |
| mReceiverThread = new Thread(() -> { |
| while (true) { |
| String charsReceived = mRttTextStream.read(); |
| if (charsReceived == null) { |
| if (Thread.currentThread().isInterrupted()) { |
| Log.w(LOG_TAG, "Thread interrupted"); |
| break; |
| } |
| Log.w(LOG_TAG, "Stream closed"); |
| break; |
| } |
| if (charsReceived.length() == 0) { |
| continue; |
| } |
| mHandler.obtainMessage(APPEND_TO_INPUT_BUFFER, charsReceived) |
| .sendToTarget(); |
| } |
| }, "RttChatbotReceiver"); |
| mReceiverThread.start(); |
| } |
| |
| public void stop() { |
| if (mSenderThread != null && mSenderThread.isAlive()) { |
| mSenderThread.quit(); |
| } |
| if (mReceiverThread != null && mReceiverThread.isAlive()) { |
| mReceiverThread.interrupt(); |
| } |
| } |
| } |