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
17package com.android.server.telecom;
18
19import android.os.RemoteException;
20import android.os.ServiceManager;
21import android.telephony.TelephonyManager;
22
23import com.android.internal.telephony.ITelephonyRegistry;
24
25/**
26 * Send a {@link TelephonyManager#ACTION_PHONE_STATE_CHANGED} broadcast when the call state
27 * changes.
28 */
29final class PhoneStateBroadcaster extends CallsManagerListenerBase {
30
31    private final CallsManager mCallsManager;
32    private final ITelephonyRegistry mRegistry;
33    private int mCurrentState = TelephonyManager.CALL_STATE_IDLE;
34
35    public PhoneStateBroadcaster(CallsManager callsManager) {
36        mCallsManager = callsManager;
37        mRegistry = ITelephonyRegistry.Stub.asInterface(ServiceManager.getService(
38                "telephony.registry"));
39        if (mRegistry == null) {
40            Log.w(this, "TelephonyRegistry is null");
41        }
42    }
43
44    @Override
45    public void onCallStateChanged(Call call, int oldState, int newState) {
46        updateStates(call);
47    }
48
49    @Override
50    public void onCallAdded(Call call) {
51        if (call.isExternalCall()) {
52            return;
53        }
54        updateStates(call);
55    }
56
57    @Override
58    public void onCallRemoved(Call call) {
59        if (call.isExternalCall()) {
60            return;
61        }
62        updateStates(call);
63    }
64
65    /**
66     * Handles changes to a call's external property.  If the call becomes external, we end up
67     * updating the call state to idle.  If the call becomes non-external, then the call state can
68     * update to off hook.
69     *
70     * @param call The call.
71     * @param isExternalCall {@code True} if the call is external, {@code false} otherwise.
72     */
73    @Override
74    public void onExternalCallChanged(Call call, boolean isExternalCall) {
75        updateStates(call);
76    }
77
78    private void updateStates(Call call) {
79        // Recalculate the current phone state based on the consolidated state of the remaining
80        // calls in the call list.
81        // Note: CallsManager#hasRingingCall() and CallsManager#getFirstCallWithState(..) do not
82        // consider external calls, so an external call is going to cause the state to be idle.
83        int callState = TelephonyManager.CALL_STATE_IDLE;
84        if (mCallsManager.hasRingingCall()) {
85            callState = TelephonyManager.CALL_STATE_RINGING;
86        } else if (mCallsManager.getFirstCallWithState(CallState.DIALING, CallState.ACTIVE,
87                    CallState.ON_HOLD) != null) {
88            callState = TelephonyManager.CALL_STATE_OFFHOOK;
89        }
90        sendPhoneStateChangedBroadcast(call, callState);
91    }
92
93    int getCallState() {
94        return mCurrentState;
95    }
96
97    private void sendPhoneStateChangedBroadcast(Call call, int phoneState) {
98        if (phoneState == mCurrentState) {
99            return;
100        }
101
102        mCurrentState = phoneState;
103
104        String callHandle = null;
105        if (call.getHandle() != null) {
106            callHandle = call.getHandle().getSchemeSpecificPart();
107        }
108
109        try {
110            if (mRegistry != null) {
111                mRegistry.notifyCallState(phoneState, callHandle);
112                Log.i(this, "Broadcasted state change: %s", mCurrentState);
113            }
114        } catch (RemoteException e) {
115            Log.w(this, "RemoteException when notifying TelephonyRegistry of call state change.");
116        }
117    }
118}
119