1/*
2 * Copyright (C) 2016 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
17package com.android.car.cluster.sample;
18
19import static com.android.car.cluster.sample.DebugUtil.DEBUG;
20
21import android.content.Intent;
22import android.os.Binder;
23import android.os.IBinder;
24import android.telecom.Call;
25import android.telecom.Call.Callback;
26import android.telecom.InCallService;
27import android.util.Log;
28
29import java.lang.ref.WeakReference;
30
31/**
32 * Monitors call state and reports it to the listeners that was registered using
33 * {@link #registerListener} method.
34 */
35public class ClusterInCallService extends InCallService {
36
37    private static final String TAG = DebugUtil.getTag(ClusterInCallService.class);
38
39    static final String ACTION_LOCAL_BINDING = "local_binding";
40
41    private final PhoneCallback mPhoneCallback = new PhoneCallback(this);
42    private volatile Callback mListener;
43
44    @Override
45    public void onCallAdded(Call call) {
46        if (DEBUG) {
47            Log.d(TAG, "onCallAdded");
48        }
49        call.registerCallback(mPhoneCallback);
50        mPhoneCallback.onStateChanged(call, call.getState());
51    }
52
53    @Override
54    public void onCallRemoved(Call call) {
55        if (DEBUG) {
56            Log.d(TAG, "onCallRemoved");
57        }
58        call.unregisterCallback(mPhoneCallback);
59    }
60
61    private void doStateChanged(Call call, int state) {
62        if (DEBUG) {
63            Log.d(TAG, "doStateChanged, call: " + call + ", state: " + state);
64        }
65        if (mListener != null) {
66            mListener.onStateChanged(call, state);
67        }
68    }
69
70    @Override
71    public IBinder onBind(Intent intent) {
72        Log.d(TAG, "onBind, intent:" + intent);
73        return ACTION_LOCAL_BINDING.equals(intent.getAction())
74            ? new LocalBinder() : super.onBind(intent);
75    }
76
77    public class LocalBinder extends Binder {
78        ClusterInCallService getService() {
79            return ClusterInCallService.this;
80        }
81    }
82
83    public void registerListener(Callback listener) {
84        Log.d(TAG, "registerListener, listener: " + listener);
85        mListener = listener;
86    }
87
88    private static class PhoneCallback extends Callback {
89        private final WeakReference<ClusterInCallService> mServiceRef;
90
91        private PhoneCallback(ClusterInCallService service) {
92            mServiceRef = new WeakReference<>(service);
93        }
94
95        @Override
96        public void onStateChanged(Call call, int state) {
97            Log.d(TAG, "PhoneCallback#onStateChanged, call: " + call + ", state: " + state);
98            ClusterInCallService service = mServiceRef.get();
99            if (service != null) {
100                service.doStateChanged(call, state);
101            }
102        }
103    }
104}
105