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      1 /*
      2  * Copyright (C) 2015 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 package com.android.phone.vvm.omtp.sync;
     17 
     18 import android.content.Context;
     19 import android.provider.VoicemailContract;
     20 import android.telecom.PhoneAccountHandle;
     21 import android.telephony.PhoneStateListener;
     22 import android.telephony.SubscriptionManager;
     23 import android.telephony.TelephonyManager;
     24 
     25 import com.android.internal.telephony.Phone;
     26 import com.android.phone.PhoneUtils;
     27 import com.android.phone.vvm.omtp.VvmPhoneStateListener;
     28 
     29 import java.util.Collections;
     30 import java.util.Map;
     31 import java.util.Set;
     32 import java.util.concurrent.ConcurrentHashMap;
     33 
     34 /**
     35  * A singleton class designed to remember the active OMTP visual voicemail sources. Because a
     36  * voicemail source is tied 1:1 to a phone account, the phone account handle is used as the key
     37  * for each voicemail source and the associated data.
     38  */
     39 public class OmtpVvmSourceManager {
     40     public static final String TAG = "OmtpVvmSourceManager";
     41 
     42     private static OmtpVvmSourceManager sInstance = new OmtpVvmSourceManager();
     43 
     44     private Context mContext;
     45     private SubscriptionManager mSubscriptionManager;
     46     private TelephonyManager mTelephonyManager;
     47     // Each phone account is associated with a phone state listener for updates to whether the
     48     // device is able to sync.
     49     private Set<PhoneAccountHandle> mActiveVvmSources;
     50     private Map<PhoneAccountHandle, PhoneStateListener> mPhoneStateListenerMap;
     51 
     52     /**
     53      * Private constructor. Instance should only be acquired through getInstance().
     54      */
     55     private OmtpVvmSourceManager() {}
     56 
     57     public static OmtpVvmSourceManager getInstance(Context context) {
     58         sInstance.setup(context);
     59         return sInstance;
     60     }
     61 
     62     /**
     63      * Set the context and system services so they do not need to be retrieved every time.
     64      * @param context The context to get the subscription and telephony manager for.
     65      */
     66     private void setup(Context context) {
     67         if (mContext == null) {
     68             mContext = context;
     69             mSubscriptionManager = SubscriptionManager.from(context);
     70             mTelephonyManager = (TelephonyManager)
     71                     mContext.getSystemService(Context.TELEPHONY_SERVICE);
     72             mActiveVvmSources = Collections.newSetFromMap(
     73                     new ConcurrentHashMap<PhoneAccountHandle, Boolean>(8, 0.9f, 1));
     74             mPhoneStateListenerMap =
     75                     new ConcurrentHashMap<PhoneAccountHandle, PhoneStateListener>(8, 0.9f, 1);
     76         }
     77     }
     78 
     79     public void addSource(PhoneAccountHandle phoneAccount) {
     80         mActiveVvmSources.add(phoneAccount);
     81     }
     82 
     83     /**
     84      * When a voicemail source is removed, we don't always know which one was removed. Check the
     85      * list of registered phone accounts against the active subscriptions list and remove the
     86      * inactive sources.
     87      */
     88     public void removeInactiveSources() {
     89         for (PhoneAccountHandle phoneAccount : mActiveVvmSources) {
     90             if (!PhoneUtils.isPhoneAccountActive(mSubscriptionManager, phoneAccount)) {
     91                 removeSource(phoneAccount);
     92             }
     93         }
     94 
     95         // Remove any orphaned phone state listeners as well.
     96         for (PhoneAccountHandle phoneAccount : mPhoneStateListenerMap.keySet()) {
     97             if (!PhoneUtils.isPhoneAccountActive(mSubscriptionManager, phoneAccount)) {
     98                 removePhoneStateListener(phoneAccount);
     99             }
    100         }
    101     }
    102 
    103     public void removeSource(Phone phone) {
    104         removeSource(PhoneUtils.makePstnPhoneAccountHandle(phone));
    105     }
    106 
    107     public void removeSource(PhoneAccountHandle phoneAccount) {
    108         VoicemailContract.Status.setStatus(mContext, phoneAccount,
    109                 VoicemailContract.Status.CONFIGURATION_STATE_NOT_CONFIGURED,
    110                 VoicemailContract.Status.DATA_CHANNEL_STATE_NO_CONNECTION,
    111                 VoicemailContract.Status.NOTIFICATION_CHANNEL_STATE_NO_CONNECTION);
    112         removePhoneStateListener(phoneAccount);
    113         mActiveVvmSources.remove(phoneAccount);
    114         OmtpVvmSyncService.cancelAllRetries(mContext, phoneAccount);
    115     }
    116 
    117     public void addPhoneStateListener(Phone phone) {
    118         addPhoneStateListener(PhoneUtils.makePstnPhoneAccountHandle(phone));
    119     }
    120 
    121     public void addPhoneStateListener(PhoneAccountHandle phoneAccount) {
    122         if (!mPhoneStateListenerMap.containsKey(phoneAccount)) {
    123             VvmPhoneStateListener phoneStateListener = new VvmPhoneStateListener(mContext,
    124                     PhoneUtils.makePstnPhoneAccountHandle(phoneAccount.getId()));
    125             mPhoneStateListenerMap.put(phoneAccount, phoneStateListener);
    126             mTelephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_SERVICE_STATE);
    127         }
    128     }
    129 
    130     public void removePhoneStateListener(PhoneAccountHandle phoneAccount) {
    131         PhoneStateListener phoneStateListener =
    132                 mPhoneStateListenerMap.remove(phoneAccount);
    133         mTelephonyManager.listen(phoneStateListener, 0);
    134     }
    135 
    136     public Set<PhoneAccountHandle> getOmtpVvmSources() {
    137         return mActiveVvmSources;
    138     }
    139 
    140     /**
    141      * Check if a certain account is registered.
    142      *
    143      * @param phoneAccount The account to look for.
    144      * @return {@code true} if the account is in the list of registered OMTP voicemail sources.
    145      * {@code false} otherwise.
    146      */
    147     public boolean isVvmSourceRegistered(PhoneAccountHandle phoneAccount) {
    148         if (phoneAccount == null) {
    149             return false;
    150         }
    151 
    152         return mActiveVvmSources.contains(phoneAccount);
    153     }
    154 }