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 
17 package com.android.messaging.sms;
18 
19 import android.content.Context;
20 import android.support.v7.mms.UserAgentInfoLoader;
21 import android.telephony.TelephonyManager;
22 import android.text.TextUtils;
23 
24 import com.android.messaging.util.BugleGservices;
25 import com.android.messaging.util.BugleGservicesKeys;
26 import com.android.messaging.util.LogUtil;
27 import com.android.messaging.util.OsUtil;
28 import com.android.messaging.util.VersionUtil;
29 
30 /**
31  * User agent and UA profile URL loader
32  */
33 public class BugleUserAgentInfoLoader implements UserAgentInfoLoader {
34     private static final String DEFAULT_USER_AGENT_PREFIX = "Bugle/";
35 
36     private Context mContext;
37     private boolean mLoaded;
38 
39     private String mUserAgent;
40     private String mUAProfUrl;
41 
BugleUserAgentInfoLoader(final Context context)42     public BugleUserAgentInfoLoader(final Context context) {
43         mContext = context;
44     }
45 
46     @Override
getUserAgent()47     public String getUserAgent() {
48         load();
49         return mUserAgent;
50     }
51 
52     @Override
getUAProfUrl()53     public String getUAProfUrl() {
54         load();
55         return mUAProfUrl;
56     }
57 
load()58     private void load() {
59         if (mLoaded) {
60             return;
61         }
62         boolean didLoad = false;
63         synchronized (this) {
64             if (!mLoaded) {
65                 loadLocked();
66                 mLoaded = true;
67                 didLoad = true;
68             }
69         }
70         if (didLoad) {
71             LogUtil.i(LogUtil.BUGLE_TAG, "Loaded user agent info: "
72                     + "UA=" + mUserAgent + ", UAProfUrl=" + mUAProfUrl);
73         }
74     }
75 
loadLocked()76     private void loadLocked() {
77         if (OsUtil.isAtLeastKLP()) {
78             // load the MMS User agent and UaProfUrl from TelephonyManager APIs
79             final TelephonyManager telephonyManager = (TelephonyManager) mContext.getSystemService(
80                     Context.TELEPHONY_SERVICE);
81             mUserAgent = telephonyManager.getMmsUserAgent();
82             mUAProfUrl = telephonyManager.getMmsUAProfUrl();
83         }
84         // if user agent string isn't set, use the format "Bugle/<app_version>".
85         if (TextUtils.isEmpty(mUserAgent)) {
86             final String simpleVersionName = VersionUtil.getInstance(mContext).getSimpleName();
87             mUserAgent = DEFAULT_USER_AGENT_PREFIX + simpleVersionName;
88         }
89         // if the UAProfUrl isn't set, get it from Gservices
90         if (TextUtils.isEmpty(mUAProfUrl)) {
91             mUAProfUrl = BugleGservices.get().getString(
92                     BugleGservicesKeys.MMS_UA_PROFILE_URL,
93                     BugleGservicesKeys.MMS_UA_PROFILE_URL_DEFAULT);
94         }
95     }
96 }
97