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 */
16package com.android.voicemail.impl.sms;
17
18import android.annotation.TargetApi;
19import android.content.BroadcastReceiver;
20import android.content.ContentUris;
21import android.content.Context;
22import android.content.Intent;
23import android.net.Uri;
24import android.os.Build.VERSION_CODES;
25import android.os.Bundle;
26import android.os.UserManager;
27import android.telecom.PhoneAccountHandle;
28import android.telephony.VisualVoicemailSms;
29import com.android.voicemail.impl.ActivationTask;
30import com.android.voicemail.impl.OmtpConstants;
31import com.android.voicemail.impl.OmtpService;
32import com.android.voicemail.impl.OmtpVvmCarrierConfigHelper;
33import com.android.voicemail.impl.Voicemail;
34import com.android.voicemail.impl.Voicemail.Builder;
35import com.android.voicemail.impl.VvmLog;
36import com.android.voicemail.impl.protocol.VisualVoicemailProtocol;
37import com.android.voicemail.impl.settings.VisualVoicemailSettingsUtil;
38import com.android.voicemail.impl.sync.SyncOneTask;
39import com.android.voicemail.impl.sync.SyncTask;
40import com.android.voicemail.impl.sync.VoicemailsQueryHelper;
41import com.android.voicemail.impl.utils.VoicemailDatabaseUtil;
42
43/** Receive SMS messages and send for processing by the OMTP visual voicemail source. */
44@TargetApi(VERSION_CODES.O)
45public class OmtpMessageReceiver extends BroadcastReceiver {
46
47  private static final String TAG = "OmtpMessageReceiver";
48
49  private Context context;
50
51  @Override
52  public void onReceive(Context context, Intent intent) {
53    this.context = context;
54    VisualVoicemailSms sms = intent.getExtras().getParcelable(OmtpService.EXTRA_VOICEMAIL_SMS);
55    PhoneAccountHandle phone = sms.getPhoneAccountHandle();
56
57    if (phone == null) {
58      // This should never happen
59      VvmLog.i(TAG, "Received message for null phone account");
60      return;
61    }
62
63    if (!context.getSystemService(UserManager.class).isUserUnlocked()) {
64      VvmLog.i(TAG, "Received message on locked device");
65      // LegacyModeSmsHandler can handle new message notifications without storage access
66      LegacyModeSmsHandler.handle(context, sms);
67      // A full sync will happen after the device is unlocked, so nothing else need to be
68      // done.
69      return;
70    }
71
72    OmtpVvmCarrierConfigHelper helper = new OmtpVvmCarrierConfigHelper(this.context, phone);
73    if (!helper.isValid()) {
74      VvmLog.e(TAG, "vvm config no longer valid");
75      return;
76    }
77    if (!VisualVoicemailSettingsUtil.isEnabled(this.context, phone)) {
78      if (helper.isLegacyModeEnabled()) {
79        LegacyModeSmsHandler.handle(context, sms);
80      } else {
81        VvmLog.i(TAG, "Received vvm message for disabled vvm source.");
82      }
83      return;
84    }
85
86    String eventType = sms.getPrefix();
87    Bundle data = sms.getFields();
88
89    if (eventType == null || data == null) {
90      VvmLog.e(TAG, "Unparsable VVM SMS received, ignoring");
91      return;
92    }
93
94    if (eventType.equals(OmtpConstants.SYNC_SMS_PREFIX)) {
95      SyncMessage message = new SyncMessage(data);
96
97      VvmLog.v(
98          TAG, "Received SYNC sms for " + phone + " with event " + message.getSyncTriggerEvent());
99      processSync(phone, message);
100    } else if (eventType.equals(OmtpConstants.STATUS_SMS_PREFIX)) {
101      VvmLog.v(TAG, "Received Status sms for " + phone);
102      // If the STATUS SMS is initiated by ActivationTask the TaskSchedulerService will reject
103      // the follow request. Providing the data will also prevent ActivationTask from
104      // requesting another STATUS SMS. The following task will only run if the carrier
105      // spontaneous send a STATUS SMS, in that case, the VVM service should be reactivated.
106      ActivationTask.start(context, phone, data);
107    } else {
108      VvmLog.w(TAG, "Unknown prefix: " + eventType);
109      VisualVoicemailProtocol protocol = helper.getProtocol();
110      if (protocol == null) {
111        return;
112      }
113      Bundle statusData = helper.getProtocol().translateStatusSmsBundle(helper, eventType, data);
114      if (statusData != null) {
115        VvmLog.i(TAG, "Protocol recognized the SMS as STATUS, activating");
116        ActivationTask.start(context, phone, data);
117      }
118    }
119  }
120
121  /**
122   * A sync message has two purposes: to signal a new voicemail message, and to indicate the
123   * voicemails on the server have changed remotely (usually through the TUI). Save the new message
124   * to the voicemail provider if it is the former case and perform a full sync in the latter case.
125   *
126   * @param message The sync message to extract data from.
127   */
128  private void processSync(PhoneAccountHandle phone, SyncMessage message) {
129    switch (message.getSyncTriggerEvent()) {
130      case OmtpConstants.NEW_MESSAGE:
131        if (!OmtpConstants.VOICE.equals(message.getContentType())) {
132          VvmLog.i(
133              TAG,
134              "Non-voice message of type '" + message.getContentType() + "' received, ignoring");
135          return;
136        }
137
138        Builder builder =
139            Voicemail.createForInsertion(message.getTimestampMillis(), message.getSender())
140                .setPhoneAccount(phone)
141                .setSourceData(message.getId())
142                .setDuration(message.getLength())
143                .setSourcePackage(context.getPackageName());
144        Voicemail voicemail = builder.build();
145
146        VoicemailsQueryHelper queryHelper = new VoicemailsQueryHelper(context);
147        if (queryHelper.isVoicemailUnique(voicemail)) {
148          Uri uri = VoicemailDatabaseUtil.insert(context, voicemail);
149          voicemail = builder.setId(ContentUris.parseId(uri)).setUri(uri).build();
150          SyncOneTask.start(context, phone, voicemail);
151        }
152        break;
153      case OmtpConstants.MAILBOX_UPDATE:
154        SyncTask.start(context, phone);
155        break;
156      case OmtpConstants.GREETINGS_UPDATE:
157        // Not implemented in V1
158        break;
159      default:
160        VvmLog.e(TAG, "Unrecognized sync trigger event: " + message.getSyncTriggerEvent());
161        break;
162    }
163  }
164}
165