1/*
2 * Copyright (C) 2011 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.server.telecom;
18
19// TODO: Needed for move to system service: import com.android.internal.R;
20import com.android.internal.os.SomeArgs;
21import com.android.internal.telephony.PhoneConstants;
22import com.android.internal.telephony.SmsApplication;
23
24import android.content.ComponentName;
25import android.content.Context;
26import android.content.Intent;
27import android.content.SharedPreferences;
28import android.content.res.Resources;
29import android.net.Uri;
30import android.os.Handler;
31import android.os.Message;
32import android.telecom.Response;
33import android.telephony.SubscriptionManager;
34import android.telephony.TelephonyManager;
35import android.widget.Toast;
36
37import java.util.ArrayList;
38import java.util.List;
39
40/**
41 * Helper class to manage the "Respond via Message" feature for incoming calls.
42 */
43public class RespondViaSmsManager extends CallsManagerListenerBase {
44    private static final int MSG_CANNED_TEXT_MESSAGES_READY = 1;
45    private static final int MSG_SHOW_SENT_TOAST = 2;
46
47    private static final RespondViaSmsManager sInstance = new RespondViaSmsManager();
48
49    private final Handler mHandler = new Handler() {
50        @Override
51        public void handleMessage(Message msg) {
52            switch (msg.what) {
53                case MSG_CANNED_TEXT_MESSAGES_READY: {
54                    SomeArgs args = (SomeArgs) msg.obj;
55                    try {
56                        Response<Void, List<String>> response =
57                                (Response<Void, List<String>>) args.arg1;
58                        List<String> textMessages =
59                                (List<String>) args.arg2;
60                        if (textMessages != null) {
61                            response.onResult(null, textMessages);
62                        } else {
63                            response.onError(null, 0, null);
64                        }
65                    } finally {
66                        args.recycle();
67                    }
68                    break;
69                }
70                case MSG_SHOW_SENT_TOAST: {
71                    SomeArgs args = (SomeArgs) msg.obj;
72                    try {
73                        String toastMessage = (String) args.arg1;
74                        Context context = (Context) args.arg2;
75                        showMessageSentToast(toastMessage, context);
76                    } finally {
77                        args.recycle();
78                    }
79                    break;
80                }
81            }
82        }
83    };
84
85    public static RespondViaSmsManager getInstance() { return sInstance; }
86
87    private RespondViaSmsManager() {}
88
89    /**
90     * Read the (customizable) canned responses from SharedPreferences,
91     * or from defaults if the user has never actually brought up
92     * the Settings UI.
93     *
94     * The interface of this method is asynchronous since it does disk I/O.
95     *
96     * @param response An object to receive an async reply, which will be called from
97     *                 the main thread.
98     * @param context The context.
99     */
100    public void loadCannedTextMessages(final Response<Void, List<String>> response,
101            final Context context) {
102        new Thread() {
103            @Override
104            public void run() {
105                Log.d(RespondViaSmsManager.this, "loadCannedResponses() starting");
106
107                // This function guarantees that QuickResponses will be in our
108                // SharedPreferences with the proper values considering there may be
109                // old QuickResponses in Telephony pre L.
110                QuickResponseUtils.maybeMigrateLegacyQuickResponses(context);
111
112                final SharedPreferences prefs = context.getSharedPreferences(
113                        QuickResponseUtils.SHARED_PREFERENCES_NAME,
114                        Context.MODE_PRIVATE | Context.MODE_MULTI_PROCESS);
115                final Resources res = context.getResources();
116
117                final ArrayList<String> textMessages = new ArrayList<>(
118                        QuickResponseUtils.NUM_CANNED_RESPONSES);
119
120                // Note the default values here must agree with the corresponding
121                // android:defaultValue attributes in respond_via_sms_settings.xml.
122                textMessages.add(0, prefs.getString(QuickResponseUtils.KEY_CANNED_RESPONSE_PREF_1,
123                        res.getString(R.string.respond_via_sms_canned_response_1)));
124                textMessages.add(1, prefs.getString(QuickResponseUtils.KEY_CANNED_RESPONSE_PREF_2,
125                        res.getString(R.string.respond_via_sms_canned_response_2)));
126                textMessages.add(2, prefs.getString(QuickResponseUtils.KEY_CANNED_RESPONSE_PREF_3,
127                        res.getString(R.string.respond_via_sms_canned_response_3)));
128                textMessages.add(3, prefs.getString(QuickResponseUtils.KEY_CANNED_RESPONSE_PREF_4,
129                        res.getString(R.string.respond_via_sms_canned_response_4)));
130
131                Log.d(RespondViaSmsManager.this,
132                        "loadCannedResponses() completed, found responses: %s",
133                        textMessages.toString());
134
135                SomeArgs args = SomeArgs.obtain();
136                args.arg1 = response;
137                args.arg2 = textMessages;
138                mHandler.obtainMessage(MSG_CANNED_TEXT_MESSAGES_READY, args).sendToTarget();
139            }
140        }.start();
141    }
142
143    @Override
144    public void onIncomingCallRejected(Call call, boolean rejectWithMessage, String textMessage) {
145        if (rejectWithMessage && call.getHandle() != null) {
146            PhoneAccountRegistrar phoneAccountRegistrar =
147                    CallsManager.getInstance().getPhoneAccountRegistrar();
148            int subId = phoneAccountRegistrar.getSubscriptionIdForPhoneAccount(
149                    call.getTargetPhoneAccount());
150            rejectCallWithMessage(call.getContext(), call.getHandle().getSchemeSpecificPart(),
151                    textMessage, subId);
152        }
153    }
154
155    private void showMessageSentToast(final String phoneNumber, final Context context) {
156        // ...and show a brief confirmation to the user (since
157        // otherwise it's hard to be sure that anything actually
158        // happened.)
159        final Resources res = context.getResources();
160        final String formatString = res.getString(
161                R.string.respond_via_sms_confirmation_format);
162        final String confirmationMsg = String.format(formatString, phoneNumber);
163        Toast.makeText(context, confirmationMsg,
164                Toast.LENGTH_LONG).show();
165
166        // TODO: If the device is locked, this toast won't actually ever
167        // be visible!  (That's because we're about to dismiss the call
168        // screen, which means that the device will return to the
169        // keyguard.  But toasts aren't visible on top of the keyguard.)
170        // Possible fixes:
171        // (1) Is it possible to allow a specific Toast to be visible
172        //     on top of the keyguard?
173        // (2) Artificially delay the dismissCallScreen() call by 3
174        //     seconds to allow the toast to be seen?
175        // (3) Don't use a toast at all; instead use a transient state
176        //     of the InCallScreen (perhaps via the InCallUiState
177        //     progressIndication feature), and have that state be
178        //     visible for 3 seconds before calling dismissCallScreen().
179    }
180
181    /**
182     * Reject the call with the specified message. If message is null this call is ignored.
183     */
184    private void rejectCallWithMessage(Context context, String phoneNumber, String textMessage,
185            int subId) {
186        if (textMessage != null) {
187            final ComponentName component =
188                    SmsApplication.getDefaultRespondViaMessageApplication(context,
189                            true /*updateIfNeeded*/);
190            if (component != null) {
191                // Build and send the intent
192                final Uri uri = Uri.fromParts(Constants.SCHEME_SMSTO, phoneNumber, null);
193                final Intent intent = new Intent(TelephonyManager.ACTION_RESPOND_VIA_MESSAGE, uri);
194                intent.putExtra(Intent.EXTRA_TEXT, textMessage);
195                if (SubscriptionManager.isValidSubscriptionId(subId)) {
196                    intent.putExtra(PhoneConstants.SUBSCRIPTION_KEY, subId);
197                }
198
199                SomeArgs args = SomeArgs.obtain();
200                args.arg1 = phoneNumber;
201                args.arg2 = context;
202                mHandler.obtainMessage(MSG_SHOW_SENT_TOAST, args).sendToTarget();
203                intent.setComponent(component);
204                context.startService(intent);
205            }
206        }
207    }
208}
209