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      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 
     17 package com.android.dialer.app.voicemail;
     18 
     19 import android.content.Context;
     20 import android.database.ContentObserver;
     21 import android.database.Cursor;
     22 import android.os.Handler;
     23 import android.support.annotation.MainThread;
     24 import android.telecom.PhoneAccountHandle;
     25 import android.telephony.PhoneStateListener;
     26 import android.telephony.ServiceState;
     27 import android.telephony.TelephonyManager;
     28 import android.util.ArrayMap;
     29 import com.android.dialer.app.calllog.CallLogAlertManager;
     30 import com.android.dialer.app.calllog.CallLogModalAlertManager;
     31 import com.android.dialer.common.Assert;
     32 import com.android.dialer.common.LogUtil;
     33 import com.android.dialer.database.CallLogQueryHandler;
     34 import com.android.dialer.voicemail.listui.error.VoicemailErrorAlert;
     35 import com.android.dialer.voicemail.listui.error.VoicemailErrorMessageCreator;
     36 import com.android.dialer.voicemail.listui.error.VoicemailStatus;
     37 import com.android.dialer.voicemail.listui.error.VoicemailStatusReader;
     38 import com.android.voicemail.VoicemailComponent;
     39 import java.util.ArrayList;
     40 import java.util.List;
     41 import java.util.Map;
     42 
     43 /**
     44  * Fetches voicemail status and generate {@link VoicemailStatus} for {@link VoicemailErrorAlert} to
     45  * show.
     46  */
     47 public class VoicemailErrorManager implements CallLogQueryHandler.Listener, VoicemailStatusReader {
     48 
     49   private final Context context;
     50   private final CallLogQueryHandler callLogQueryHandler;
     51   private final VoicemailErrorAlert alertItem;
     52 
     53   private final Map<PhoneAccountHandle, ServiceStateListener> listeners = new ArrayMap<>();
     54 
     55   private final ContentObserver statusObserver =
     56       new ContentObserver(new Handler()) {
     57         @Override
     58         public void onChange(boolean selfChange) {
     59           super.onChange(selfChange);
     60           fetchStatus();
     61         }
     62       };
     63 
     64   private boolean isForeground;
     65   private boolean statusInvalidated;
     66 
     67   public VoicemailErrorManager(
     68       Context context,
     69       CallLogAlertManager alertManager,
     70       CallLogModalAlertManager modalAlertManager) {
     71     this.context = context;
     72     alertItem =
     73         new VoicemailErrorAlert(
     74             context, alertManager, modalAlertManager, new VoicemailErrorMessageCreator());
     75     callLogQueryHandler = new CallLogQueryHandler(context, context.getContentResolver(), this);
     76     fetchStatus();
     77   }
     78 
     79   public ContentObserver getContentObserver() {
     80     return statusObserver;
     81   }
     82 
     83   @MainThread
     84   @Override
     85   public void onVoicemailStatusFetched(Cursor statusCursor) {
     86     List<VoicemailStatus> statuses = new ArrayList<>();
     87     while (statusCursor.moveToNext()) {
     88       VoicemailStatus status = new VoicemailStatus(context, statusCursor);
     89       if (status.isActive()) {
     90         statuses.add(status);
     91         addServiceStateListener(status);
     92       }
     93     }
     94     alertItem.updateStatus(statuses, this);
     95     // TODO(twyen): a bug support error from multiple sources.
     96     return;
     97   }
     98 
     99   @MainThread
    100   private void addServiceStateListener(VoicemailStatus status) {
    101     Assert.isMainThread();
    102     if (!VoicemailComponent.get(context).getVoicemailClient().isVoicemailModuleEnabled()) {
    103       LogUtil.i("VoicemailErrorManager.addServiceStateListener", "VVM module not enabled");
    104       return;
    105     }
    106     if (!status.sourcePackage.equals(context.getPackageName())) {
    107       LogUtil.i("VoicemailErrorManager.addServiceStateListener", "non-dialer source");
    108       return;
    109     }
    110     TelephonyManager telephonyManager =
    111         context
    112             .getSystemService(TelephonyManager.class)
    113             .createForPhoneAccountHandle(status.getPhoneAccountHandle());
    114     if (telephonyManager == null) {
    115       LogUtil.e("VoicemailErrorManager.addServiceStateListener", "invalid PhoneAccountHandle");
    116       return;
    117     }
    118     PhoneAccountHandle phoneAccountHandle = status.getPhoneAccountHandle();
    119     if (listeners.containsKey(phoneAccountHandle)) {
    120       return;
    121     }
    122     LogUtil.i(
    123         "VoicemailErrorManager.addServiceStateListener",
    124         "adding listener for " + phoneAccountHandle);
    125     ServiceStateListener serviceStateListener = new ServiceStateListener();
    126     telephonyManager.listen(serviceStateListener, PhoneStateListener.LISTEN_SERVICE_STATE);
    127     listeners.put(phoneAccountHandle, serviceStateListener);
    128   }
    129 
    130   @Override
    131   public void onVoicemailUnreadCountFetched(Cursor cursor) {
    132     // Do nothing
    133   }
    134 
    135   @Override
    136   public void onMissedCallsUnreadCountFetched(Cursor cursor) {
    137     // Do nothing
    138   }
    139 
    140   @Override
    141   public boolean onCallsFetched(Cursor combinedCursor) {
    142     // Do nothing
    143     return false;
    144   }
    145 
    146   public void onResume() {
    147     isForeground = true;
    148     if (statusInvalidated) {
    149       fetchStatus();
    150     }
    151   }
    152 
    153   public void onPause() {
    154     isForeground = false;
    155     statusInvalidated = false;
    156   }
    157 
    158   public void onDestroy() {
    159     TelephonyManager telephonyManager = context.getSystemService(TelephonyManager.class);
    160     for (ServiceStateListener listener : listeners.values()) {
    161       telephonyManager.listen(listener, PhoneStateListener.LISTEN_NONE);
    162     }
    163   }
    164 
    165   @Override
    166   public void refresh() {
    167     fetchStatus();
    168   }
    169 
    170   /**
    171    * Fetch the status when the dialer is in foreground, or queue a fetch when the dialer resumes.
    172    */
    173   private void fetchStatus() {
    174     if (!isForeground) {
    175       // Dialer is in the background, UI should not be updated. Reload the status when it resumes.
    176       statusInvalidated = true;
    177       return;
    178     }
    179     callLogQueryHandler.fetchVoicemailStatus();
    180   }
    181 
    182   private class ServiceStateListener extends PhoneStateListener {
    183 
    184     @Override
    185     public void onServiceStateChanged(ServiceState serviceState) {
    186       fetchStatus();
    187     }
    188   }
    189 }
    190