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
17package com.android.messaging.sms;
18
19import android.content.Context;
20import android.support.v7.mms.UserAgentInfoLoader;
21import android.telephony.TelephonyManager;
22import android.text.TextUtils;
23
24import com.android.messaging.util.BugleGservices;
25import com.android.messaging.util.BugleGservicesKeys;
26import com.android.messaging.util.LogUtil;
27import com.android.messaging.util.OsUtil;
28import com.android.messaging.util.VersionUtil;
29
30/**
31 * User agent and UA profile URL loader
32 */
33public 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
42    public BugleUserAgentInfoLoader(final Context context) {
43        mContext = context;
44    }
45
46    @Override
47    public String getUserAgent() {
48        load();
49        return mUserAgent;
50    }
51
52    @Override
53    public String getUAProfUrl() {
54        load();
55        return mUAProfUrl;
56    }
57
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
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