1/*
2 * Copyright (C) 2008 Esmertec AG.
3 * Copyright (C) 2008 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.mms.transaction;
19
20import com.android.mms.LogTag;
21import com.android.mms.ui.MessagingPreferenceActivity;
22import com.google.android.mms.MmsException;
23import android.database.sqlite.SqliteWrapper;
24
25import android.content.Context;
26import android.content.Intent;
27import android.content.SharedPreferences;
28import android.database.Cursor;
29import android.database.sqlite.SQLiteException;
30import android.net.Uri;
31import android.preference.PreferenceManager;
32import android.provider.Telephony.Sms;
33import android.util.Log;
34
35public class SmsMessageSender implements MessageSender {
36    protected final Context mContext;
37    protected final int mNumberOfDests;
38    private final String[] mDests;
39    protected final String mMessageText;
40    protected final String mServiceCenter;
41    protected final long mThreadId;
42    protected long mTimestamp;
43
44    // Default preference values
45    private static final boolean DEFAULT_DELIVERY_REPORT_MODE  = false;
46
47    private static final String[] SERVICE_CENTER_PROJECTION = new String[] {
48        Sms.Conversations.REPLY_PATH_PRESENT,
49        Sms.Conversations.SERVICE_CENTER,
50    };
51
52    private static final int COLUMN_REPLY_PATH_PRESENT = 0;
53    private static final int COLUMN_SERVICE_CENTER     = 1;
54
55    public SmsMessageSender(Context context, String[] dests, String msgText, long threadId) {
56        mContext = context;
57        mMessageText = msgText;
58        if (dests != null) {
59            mNumberOfDests = dests.length;
60            mDests = new String[mNumberOfDests];
61            System.arraycopy(dests, 0, mDests, 0, mNumberOfDests);
62        } else {
63            mNumberOfDests = 0;
64            mDests = null;
65        }
66        mTimestamp = System.currentTimeMillis();
67        mThreadId = threadId;
68        mServiceCenter = getOutgoingServiceCenter(mThreadId);
69    }
70
71    public boolean sendMessage(long token) throws MmsException {
72        // In order to send the message one by one, instead of sending now, the message will split,
73        // and be put into the queue along with each destinations
74        return queueMessage(token);
75    }
76
77    private boolean queueMessage(long token) throws MmsException {
78        if ((mMessageText == null) || (mNumberOfDests == 0)) {
79            // Don't try to send an empty message.
80            throw new MmsException("Null message body or dest.");
81        }
82
83        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mContext);
84        boolean requestDeliveryReport = prefs.getBoolean(
85                MessagingPreferenceActivity.SMS_DELIVERY_REPORT_MODE,
86                DEFAULT_DELIVERY_REPORT_MODE);
87
88        for (int i = 0; i < mNumberOfDests; i++) {
89            try {
90                Sms.addMessageToUri(mContext.getContentResolver(),
91                        Uri.parse("content://sms/queued"), mDests[i],
92                        mMessageText, null, mTimestamp,
93                        true /* read */,
94                        requestDeliveryReport,
95                        mThreadId);
96            } catch (SQLiteException e) {
97                SqliteWrapper.checkSQLiteException(mContext, e);
98            }
99        }
100        // Notify the SmsReceiverService to send the message out
101        mContext.sendBroadcast(new Intent(SmsReceiverService.ACTION_SEND_MESSAGE,
102                null,
103                mContext,
104                SmsReceiver.class));
105        return false;
106    }
107
108    /**
109     * Get the service center to use for a reply.
110     *
111     * The rule from TS 23.040 D.6 is that we send reply messages to
112     * the service center of the message to which we're replying, but
113     * only if we haven't already replied to that message and only if
114     * <code>TP-Reply-Path</code> was set in that message.
115     *
116     * Therefore, return the service center from the most recent
117     * message in the conversation, but only if it is a message from
118     * the other party, and only if <code>TP-Reply-Path</code> is set.
119     * Otherwise, return null.
120     */
121    private String getOutgoingServiceCenter(long threadId) {
122        Cursor cursor = null;
123
124        try {
125            cursor = SqliteWrapper.query(mContext, mContext.getContentResolver(),
126                            Sms.CONTENT_URI, SERVICE_CENTER_PROJECTION,
127                            "thread_id = " + threadId, null, "date DESC");
128
129            if ((cursor == null) || !cursor.moveToFirst()) {
130                return null;
131            }
132
133            boolean replyPathPresent = (1 == cursor.getInt(COLUMN_REPLY_PATH_PRESENT));
134            return replyPathPresent ? cursor.getString(COLUMN_SERVICE_CENTER) : null;
135        } finally {
136            if (cursor != null) {
137                cursor.close();
138            }
139        }
140    }
141
142    private void log(String msg) {
143        Log.d(LogTag.TAG, "[SmsMsgSender] " + msg);
144    }
145}
146