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