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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.datamodel;
18 
19 import android.content.Context;
20 import android.database.Cursor;
21 import android.database.SQLException;
22 import android.database.sqlite.SQLiteDatabase;
23 import android.database.sqlite.SQLiteOpenHelper;
24 import android.provider.BaseColumns;
25 
26 import com.android.messaging.BugleApplication;
27 import com.android.messaging.R;
28 import com.android.messaging.datamodel.data.ConversationListItemData;
29 import com.android.messaging.datamodel.data.MessageData;
30 import com.android.messaging.datamodel.data.ParticipantData;
31 import com.android.messaging.util.Assert;
32 import com.android.messaging.util.Assert.DoesNotRunOnMainThread;
33 import com.android.messaging.util.LogUtil;
34 import com.google.common.annotations.VisibleForTesting;
35 
36 /**
37  * TODO: Open Issues:
38  * - Should we be storing the draft messages in the regular messages table or should we have a
39  *   separate table for drafts to keep the normal messages query as simple as possible?
40  */
41 
42 /**
43  * Allows access to the SQL database.  This is package private.
44  */
45 public class DatabaseHelper extends SQLiteOpenHelper {
46     public static final String DATABASE_NAME = "bugle_db";
47 
getDatabaseVersion(final Context context)48     private static final int getDatabaseVersion(final Context context) {
49         return Integer.parseInt(context.getResources().getString(R.string.database_version));
50     }
51 
52     /**
53      * Table containing names of all other tables and views.
54      * TODO(rtenneti): Fix the following special SQLLite table name when SQLLite changes.
55      */
56     private static final String PRIMARY_TABLE = "sqlite_master";
57     /** Column containing the name of the tables and views */
58     private static final String[] PRIMARY_COLUMNS = new String[] { "name", };
59 
60     // Table names
61     public static final String CONVERSATIONS_TABLE = "conversations";
62     public static final String MESSAGES_TABLE = "messages";
63     public static final String PARTS_TABLE = "parts";
64     public static final String PARTICIPANTS_TABLE = "participants";
65     public static final String CONVERSATION_PARTICIPANTS_TABLE = "conversation_participants";
66 
67     // Views
68     static final String DRAFT_PARTS_VIEW = "draft_parts_view";
69 
70     // Conversations table schema
71     public static class ConversationColumns implements BaseColumns {
72         /* SMS/MMS Thread ID from the system provider */
73         public static final String SMS_THREAD_ID = "sms_thread_id";
74 
75         /* Display name for the conversation */
76         public static final String NAME = "name";
77 
78         /* Latest Message ID for the read status to display in conversation list */
79         public static final String LATEST_MESSAGE_ID = "latest_message_id";
80 
81         /* Latest text snippet for display in conversation list */
82         public static final String SNIPPET_TEXT = "snippet_text";
83 
84         /* Latest text subject for display in conversation list, empty string if none exists */
85         public static final String SUBJECT_TEXT = "subject_text";
86 
87         /* Preview Uri */
88         public static final String PREVIEW_URI = "preview_uri";
89 
90         /* The preview uri's content type */
91         public static final String PREVIEW_CONTENT_TYPE = "preview_content_type";
92 
93         /* If we should display the current draft snippet/preview pair or snippet/preview pair */
94         public static final String SHOW_DRAFT = "show_draft";
95 
96         /* Latest draft text subject for display in conversation list, empty string if none exists*/
97         public static final String DRAFT_SUBJECT_TEXT = "draft_subject_text";
98 
99         /* Latest draft text snippet for display, empty string if none exists */
100         public static final String DRAFT_SNIPPET_TEXT = "draft_snippet_text";
101 
102         /* Draft Preview Uri, empty string if none exists */
103         public static final String DRAFT_PREVIEW_URI = "draft_preview_uri";
104 
105         /* The preview uri's content type */
106         public static final String DRAFT_PREVIEW_CONTENT_TYPE = "draft_preview_content_type";
107 
108         /* If this conversation is archived */
109         public static final String ARCHIVE_STATUS = "archive_status";
110 
111         /* Timestamp for sorting purposes */
112         public static final String SORT_TIMESTAMP = "sort_timestamp";
113 
114         /* Last read message timestamp */
115         public static final String LAST_READ_TIMESTAMP = "last_read_timestamp";
116 
117         /* Avatar for the conversation. Could be for group of individual */
118         public static final String ICON = "icon";
119 
120         /* Participant contact ID if this conversation has a single participant. -1 otherwise */
121         public static final String PARTICIPANT_CONTACT_ID = "participant_contact_id";
122 
123         /* Participant lookup key if this conversation has a single participant. null otherwise */
124         public static final String PARTICIPANT_LOOKUP_KEY = "participant_lookup_key";
125 
126         /*
127          * Participant's normalized destination if this conversation has a single participant.
128          * null otherwise.
129          */
130         public static final String OTHER_PARTICIPANT_NORMALIZED_DESTINATION =
131                 "participant_normalized_destination";
132 
133         /* Default self participant for the conversation */
134         public static final String CURRENT_SELF_ID = "current_self_id";
135 
136         /* Participant count not including self (so will be 1 for 1:1 or bigger for group) */
137         public static final String PARTICIPANT_COUNT = "participant_count";
138 
139         /* Should notifications be enabled for this conversation? */
140         public static final String NOTIFICATION_ENABLED = "notification_enabled";
141 
142         /* Notification sound used for the conversation */
143         public static final String NOTIFICATION_SOUND_URI = "notification_sound_uri";
144 
145         /* Should vibrations be enabled for the conversation's notification? */
146         public static final String NOTIFICATION_VIBRATION = "notification_vibration";
147 
148         /* Conversation recipients include email address */
149         public static final String INCLUDE_EMAIL_ADDRESS = "include_email_addr";
150 
151         // Record the last received sms's service center info if it indicates that the reply path
152         // is present (TP-Reply-Path), so that we could use it for the subsequent message to send.
153         // Refer to TS 23.040 D.6 and SmsMessageSender.java in Android Messaging app.
154         public static final String SMS_SERVICE_CENTER = "sms_service_center";
155 
156         // A conversation is enterprise if one of the participant is a enterprise contact.
157         public static final String IS_ENTERPRISE = "IS_ENTERPRISE";
158     }
159 
160     // Conversation table SQL
161     private static final String CREATE_CONVERSATIONS_TABLE_SQL =
162             "CREATE TABLE " + CONVERSATIONS_TABLE + "("
163                     + ConversationColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
164                     // TODO : Int? Required not default?
165                     + ConversationColumns.SMS_THREAD_ID + " INT DEFAULT(0), "
166                     + ConversationColumns.NAME + " TEXT, "
167                     + ConversationColumns.LATEST_MESSAGE_ID + " INT, "
168                     + ConversationColumns.SNIPPET_TEXT + " TEXT, "
169                     + ConversationColumns.SUBJECT_TEXT + " TEXT, "
170                     + ConversationColumns.PREVIEW_URI + " TEXT, "
171                     + ConversationColumns.PREVIEW_CONTENT_TYPE + " TEXT, "
172                     + ConversationColumns.SHOW_DRAFT + " INT DEFAULT(0), "
173                     + ConversationColumns.DRAFT_SNIPPET_TEXT + " TEXT, "
174                     + ConversationColumns.DRAFT_SUBJECT_TEXT + " TEXT, "
175                     + ConversationColumns.DRAFT_PREVIEW_URI + " TEXT, "
176                     + ConversationColumns.DRAFT_PREVIEW_CONTENT_TYPE + " TEXT, "
177                     + ConversationColumns.ARCHIVE_STATUS + " INT DEFAULT(0), "
178                     + ConversationColumns.SORT_TIMESTAMP + " INT DEFAULT(0), "
179                     + ConversationColumns.LAST_READ_TIMESTAMP + " INT DEFAULT(0), "
180                     + ConversationColumns.ICON + " TEXT, "
181                     + ConversationColumns.PARTICIPANT_CONTACT_ID + " INT DEFAULT ( "
182                             + ParticipantData.PARTICIPANT_CONTACT_ID_NOT_RESOLVED + "), "
183                     + ConversationColumns.PARTICIPANT_LOOKUP_KEY + " TEXT, "
184                     + ConversationColumns.OTHER_PARTICIPANT_NORMALIZED_DESTINATION + " TEXT, "
185                     + ConversationColumns.CURRENT_SELF_ID + " TEXT, "
186                     + ConversationColumns.PARTICIPANT_COUNT + " INT DEFAULT(0), "
187                     + ConversationColumns.NOTIFICATION_ENABLED + " INT DEFAULT(1), "
188                     + ConversationColumns.NOTIFICATION_SOUND_URI + " TEXT, "
189                     + ConversationColumns.NOTIFICATION_VIBRATION + " INT DEFAULT(1), "
190                     + ConversationColumns.INCLUDE_EMAIL_ADDRESS + " INT DEFAULT(0), "
191                     + ConversationColumns.SMS_SERVICE_CENTER + " TEXT ,"
192                     + ConversationColumns.IS_ENTERPRISE + " INT DEFAULT(0)"
193                     + ");";
194 
195     private static final String CONVERSATIONS_TABLE_SMS_THREAD_ID_INDEX_SQL =
196             "CREATE INDEX index_" + CONVERSATIONS_TABLE + "_" + ConversationColumns.SMS_THREAD_ID
197             + " ON " +  CONVERSATIONS_TABLE
198             + "(" + ConversationColumns.SMS_THREAD_ID + ")";
199 
200     private static final String CONVERSATIONS_TABLE_ARCHIVE_STATUS_INDEX_SQL =
201             "CREATE INDEX index_" + CONVERSATIONS_TABLE + "_" + ConversationColumns.ARCHIVE_STATUS
202             + " ON " +  CONVERSATIONS_TABLE
203             + "(" + ConversationColumns.ARCHIVE_STATUS + ")";
204 
205     private static final String CONVERSATIONS_TABLE_SORT_TIMESTAMP_INDEX_SQL =
206             "CREATE INDEX index_" + CONVERSATIONS_TABLE + "_" + ConversationColumns.SORT_TIMESTAMP
207             + " ON " +  CONVERSATIONS_TABLE
208             + "(" + ConversationColumns.SORT_TIMESTAMP + ")";
209 
210     // Messages table schema
211     public static class MessageColumns implements BaseColumns {
212         /* conversation id that this message belongs to */
213         public static final String CONVERSATION_ID = "conversation_id";
214 
215         /* participant which send this message */
216         public static final String SENDER_PARTICIPANT_ID = "sender_id";
217 
218         /* This is bugle's internal status for the message */
219         public static final String STATUS = "message_status";
220 
221         /* Type of message: SMS, MMS or MMS notification */
222         public static final String PROTOCOL = "message_protocol";
223 
224         /* This is the time that the sender sent the message */
225         public static final String SENT_TIMESTAMP = "sent_timestamp";
226 
227         /* Time that we received the message on this device */
228         public static final String RECEIVED_TIMESTAMP = "received_timestamp";
229 
230         /* When the message has been seen by a user in a notification */
231         public static final String SEEN = "seen";
232 
233         /* When the message has been read by a user */
234         public static final String READ = "read";
235 
236         /* participant representing the sim which processed this message */
237         public static final String SELF_PARTICIPANT_ID = "self_id";
238 
239         /*
240          * Time when a retry is initiated. This is used to compute the retry window
241          * when we retry sending/downloading a message.
242          */
243         public static final String RETRY_START_TIMESTAMP = "retry_start_timestamp";
244 
245         // Columns which map to the SMS provider
246 
247         /* Message ID from the platform provider */
248         public static final String SMS_MESSAGE_URI = "sms_message_uri";
249 
250         /* The message priority for MMS message */
251         public static final String SMS_PRIORITY = "sms_priority";
252 
253         /* The message size for MMS message */
254         public static final String SMS_MESSAGE_SIZE = "sms_message_size";
255 
256         /* The subject for MMS message */
257         public static final String MMS_SUBJECT = "mms_subject";
258 
259         /* Transaction id for MMS notificaiton */
260         public static final String MMS_TRANSACTION_ID = "mms_transaction_id";
261 
262         /* Content location for MMS notificaiton */
263         public static final String MMS_CONTENT_LOCATION = "mms_content_location";
264 
265         /* The expiry time (ms) for MMS message */
266         public static final String MMS_EXPIRY = "mms_expiry";
267 
268         /* The detailed status (RESPONSE_STATUS or RETRIEVE_STATUS) for MMS message */
269         public static final String RAW_TELEPHONY_STATUS = "raw_status";
270     }
271 
272     // Messages table SQL
273     private static final String CREATE_MESSAGES_TABLE_SQL =
274             "CREATE TABLE " + MESSAGES_TABLE + " ("
275                     + MessageColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
276                     + MessageColumns.CONVERSATION_ID + " INT, "
277                     + MessageColumns.SENDER_PARTICIPANT_ID + " INT, "
278                     + MessageColumns.SENT_TIMESTAMP + " INT DEFAULT(0), "
279                     + MessageColumns.RECEIVED_TIMESTAMP + " INT DEFAULT(0), "
280                     + MessageColumns.PROTOCOL + " INT DEFAULT(0), "
281                     + MessageColumns.STATUS + " INT DEFAULT(0), "
282                     + MessageColumns.SEEN + " INT DEFAULT(0), "
283                     + MessageColumns.READ + " INT DEFAULT(0), "
284                     + MessageColumns.SMS_MESSAGE_URI + " TEXT, "
285                     + MessageColumns.SMS_PRIORITY + " INT DEFAULT(0), "
286                     + MessageColumns.SMS_MESSAGE_SIZE + " INT DEFAULT(0), "
287                     + MessageColumns.MMS_SUBJECT + " TEXT, "
288                     + MessageColumns.MMS_TRANSACTION_ID + " TEXT, "
289                     + MessageColumns.MMS_CONTENT_LOCATION + " TEXT, "
290                     + MessageColumns.MMS_EXPIRY + " INT DEFAULT(0), "
291                     + MessageColumns.RAW_TELEPHONY_STATUS + " INT DEFAULT(0), "
292                     + MessageColumns.SELF_PARTICIPANT_ID + " INT, "
293                     + MessageColumns.RETRY_START_TIMESTAMP + " INT DEFAULT(0), "
294                     + "FOREIGN KEY (" + MessageColumns.CONVERSATION_ID + ") REFERENCES "
295                     + CONVERSATIONS_TABLE + "(" + ConversationColumns._ID + ") ON DELETE CASCADE "
296                     + "FOREIGN KEY (" + MessageColumns.SENDER_PARTICIPANT_ID + ") REFERENCES "
297                     + PARTICIPANTS_TABLE + "(" + ParticipantColumns._ID + ") ON DELETE SET NULL "
298                     + "FOREIGN KEY (" + MessageColumns.SELF_PARTICIPANT_ID + ") REFERENCES "
299                     + PARTICIPANTS_TABLE + "(" + ParticipantColumns._ID + ") ON DELETE SET NULL "
300                     + ");";
301 
302     // Primary sort index for messages table : by conversation id, status, received timestamp.
303     private static final String MESSAGES_TABLE_SORT_INDEX_SQL =
304             "CREATE INDEX index_" + MESSAGES_TABLE + "_sort ON " +  MESSAGES_TABLE + "("
305                     + MessageColumns.CONVERSATION_ID + ", "
306                     + MessageColumns.STATUS + ", "
307                     + MessageColumns.RECEIVED_TIMESTAMP + ")";
308 
309     private static final String MESSAGES_TABLE_STATUS_SEEN_INDEX_SQL =
310             "CREATE INDEX index_" + MESSAGES_TABLE + "_status_seen ON " +  MESSAGES_TABLE + "("
311                     + MessageColumns.STATUS + ", "
312                     + MessageColumns.SEEN + ")";
313 
314     // Parts table schema
315     // A part may contain text or a media url, but not both.
316     public static class PartColumns implements BaseColumns {
317         /* message id that this part belongs to */
318         public static final String MESSAGE_ID = "message_id";
319 
320         /* conversation id that this part belongs to */
321         public static final String CONVERSATION_ID = "conversation_id";
322 
323         /* text for this part */
324         public static final String TEXT = "text";
325 
326         /* content uri for this part */
327         public static final String CONTENT_URI = "uri";
328 
329         /* content type for this part */
330         public static final String CONTENT_TYPE = "content_type";
331 
332         /* cached width for this part (for layout while loading) */
333         public static final String WIDTH = "width";
334 
335         /* cached height for this part (for layout while loading) */
336         public static final String HEIGHT = "height";
337 
338         /* de-normalized copy of timestamp from the messages table.  This is populated
339          * via an insert trigger on the parts table.
340          */
341         public static final String TIMESTAMP = "timestamp";
342     }
343 
344     // Message part table SQL
345     private static final String CREATE_PARTS_TABLE_SQL =
346             "CREATE TABLE " + PARTS_TABLE + "("
347                     + PartColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
348                     + PartColumns.MESSAGE_ID + " INT,"
349                     + PartColumns.TEXT + " TEXT,"
350                     + PartColumns.CONTENT_URI + " TEXT,"
351                     + PartColumns.CONTENT_TYPE + " TEXT,"
352                     + PartColumns.WIDTH + " INT DEFAULT("
353                     + MessagingContentProvider.UNSPECIFIED_SIZE + "),"
354                     + PartColumns.HEIGHT + " INT DEFAULT("
355                     + MessagingContentProvider.UNSPECIFIED_SIZE + "),"
356                     + PartColumns.TIMESTAMP + " INT, "
357                     + PartColumns.CONVERSATION_ID + " INT NOT NULL,"
358                     + "FOREIGN KEY (" + PartColumns.MESSAGE_ID + ") REFERENCES "
359                     + MESSAGES_TABLE + "(" + MessageColumns._ID + ") ON DELETE CASCADE "
360                     + "FOREIGN KEY (" + PartColumns.CONVERSATION_ID + ") REFERENCES "
361                     + CONVERSATIONS_TABLE + "(" + ConversationColumns._ID + ") ON DELETE CASCADE "
362                     + ");";
363 
364     public static final String CREATE_PARTS_TRIGGER_SQL =
365             "CREATE TRIGGER " + PARTS_TABLE + "_TRIGGER" + " AFTER INSERT ON " + PARTS_TABLE
366             + " FOR EACH ROW "
367             + " BEGIN UPDATE " + PARTS_TABLE
368             + " SET " + PartColumns.TIMESTAMP + "="
369             + " (SELECT received_timestamp FROM " + MESSAGES_TABLE + " WHERE " + MESSAGES_TABLE
370             + "." + MessageColumns._ID + "=" + "NEW." + PartColumns.MESSAGE_ID + ")"
371             + " WHERE " + PARTS_TABLE + "." + PartColumns._ID + "=" + "NEW." + PartColumns._ID
372             + "; END";
373 
374     public static final String CREATE_MESSAGES_TRIGGER_SQL =
375             "CREATE TRIGGER " + MESSAGES_TABLE + "_TRIGGER" + " AFTER UPDATE OF "
376             + MessageColumns.RECEIVED_TIMESTAMP + " ON " + MESSAGES_TABLE
377             + " FOR EACH ROW BEGIN UPDATE " + PARTS_TABLE + " SET " + PartColumns.TIMESTAMP
378             + " = NEW." + MessageColumns.RECEIVED_TIMESTAMP + " WHERE " + PARTS_TABLE + "."
379             + PartColumns.MESSAGE_ID + " = NEW." + MessageColumns._ID
380             + "; END;";
381 
382     // Primary sort index for parts table : by message_id
383     private static final String PARTS_TABLE_MESSAGE_INDEX_SQL =
384             "CREATE INDEX index_" + PARTS_TABLE + "_message_id ON " + PARTS_TABLE + "("
385                     + PartColumns.MESSAGE_ID + ")";
386 
387     // Participants table schema
388     public static class ParticipantColumns implements BaseColumns {
389         /* The subscription id for the sim associated with this self participant.
390          * Introduced in L. For earlier versions will always be default_sub_id (-1).
391          * For multi sim devices (or cases where the sim was changed) single device
392          * may have several different sub_id values */
393         public static final String SUB_ID = "sub_id";
394 
395         /* The slot of the active SIM (inserted in the device) for this self-participant. If the
396          * self-participant doesn't correspond to any active SIM, this will be
397          * {@link android.telephony.SubscriptionManager#INVALID_SLOT_ID}.
398          * The column is ignored for all non-self participants.
399          */
400         public static final String SIM_SLOT_ID = "sim_slot_id";
401 
402         /* The phone number stored in a standard E164 format if possible.  This is unique for a
403          * given participant.  We can't handle multiple participants with the same phone number
404          * since we don't know which of them a message comes from. This can also be an email
405          * address, in which case this is the same as the displayed address */
406         public static final String NORMALIZED_DESTINATION = "normalized_destination";
407 
408         /* The phone number as originally supplied and used for dialing. Not necessarily in E164
409          * format or unique */
410         public static final String SEND_DESTINATION = "send_destination";
411 
412         /* The user-friendly formatting of the phone number according to the region setting of
413          * the device when the row was added. */
414         public static final String DISPLAY_DESTINATION = "display_destination";
415 
416         /* A string with this participant's full name or a pretty printed phone number */
417         public static final String FULL_NAME = "full_name";
418 
419         /* A string with just this participant's first name */
420         public static final String FIRST_NAME = "first_name";
421 
422         /* A local URI to an asset for the icon for this participant */
423         public static final String PROFILE_PHOTO_URI = "profile_photo_uri";
424 
425         /* Contact id for matching local contact for this participant */
426         public static final String CONTACT_ID = "contact_id";
427 
428         /* String that contains hints on how to find contact information in a contact lookup */
429         public static final String LOOKUP_KEY = "lookup_key";
430 
431         /* If this participant is blocked */
432         public static final String BLOCKED = "blocked";
433 
434         /* The color of the subscription (FOR SELF PARTICIPANTS ONLY) */
435         public static final String SUBSCRIPTION_COLOR = "subscription_color";
436 
437         /* The name of the subscription (FOR SELF PARTICIPANTS ONLY) */
438         public static final String SUBSCRIPTION_NAME = "subscription_name";
439 
440         /* The exact destination stored in Contacts for this participant */
441         public static final String CONTACT_DESTINATION = "contact_destination";
442     }
443 
444     // Participants table SQL
445     private static final String CREATE_PARTICIPANTS_TABLE_SQL =
446             "CREATE TABLE " + PARTICIPANTS_TABLE + "("
447                     + ParticipantColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
448                     + ParticipantColumns.SUB_ID + " INT DEFAULT("
449                     + ParticipantData.OTHER_THAN_SELF_SUB_ID + "),"
450                     + ParticipantColumns.SIM_SLOT_ID + " INT DEFAULT("
451                     + ParticipantData.INVALID_SLOT_ID + "),"
452                     + ParticipantColumns.NORMALIZED_DESTINATION + " TEXT,"
453                     + ParticipantColumns.SEND_DESTINATION + " TEXT,"
454                     + ParticipantColumns.DISPLAY_DESTINATION + " TEXT,"
455                     + ParticipantColumns.FULL_NAME + " TEXT,"
456                     + ParticipantColumns.FIRST_NAME + " TEXT,"
457                     + ParticipantColumns.PROFILE_PHOTO_URI + " TEXT, "
458                     + ParticipantColumns.CONTACT_ID + " INT DEFAULT( "
459                     + ParticipantData.PARTICIPANT_CONTACT_ID_NOT_RESOLVED + "), "
460                     + ParticipantColumns.LOOKUP_KEY + " STRING, "
461                     + ParticipantColumns.BLOCKED + " INT DEFAULT(0), "
462                     + ParticipantColumns.SUBSCRIPTION_NAME + " TEXT, "
463                     + ParticipantColumns.SUBSCRIPTION_COLOR + " INT DEFAULT(0), "
464                     + ParticipantColumns.CONTACT_DESTINATION + " TEXT, "
465                     + "UNIQUE (" + ParticipantColumns.NORMALIZED_DESTINATION + ", "
466                     + ParticipantColumns.SUB_ID + ") ON CONFLICT FAIL" + ");";
467 
468     private static final String CREATE_SELF_PARTICIPANT_SQL =
469             "INSERT INTO " + PARTICIPANTS_TABLE
470             + " ( " +  ParticipantColumns.SUB_ID + " ) VALUES ( %s )";
471 
getCreateSelfParticipantSql(int subId)472     static String getCreateSelfParticipantSql(int subId) {
473         return String.format(CREATE_SELF_PARTICIPANT_SQL, subId);
474     }
475 
476     // Conversation Participants table schema - contains a list of participants excluding the user
477     // in a given conversation.
478     public static class ConversationParticipantsColumns implements BaseColumns {
479         /* participant id of someone in this conversation */
480         public static final String PARTICIPANT_ID = "participant_id";
481 
482         /* conversation id that this participant belongs to */
483         public static final String CONVERSATION_ID = "conversation_id";
484     }
485 
486     // Conversation Participants table SQL
487     private static final String CREATE_CONVERSATION_PARTICIPANTS_TABLE_SQL =
488             "CREATE TABLE " + CONVERSATION_PARTICIPANTS_TABLE + "("
489                     + ConversationParticipantsColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
490                     + ConversationParticipantsColumns.CONVERSATION_ID + " INT,"
491                     + ConversationParticipantsColumns.PARTICIPANT_ID + " INT,"
492                     + "UNIQUE (" + ConversationParticipantsColumns.CONVERSATION_ID + ","
493                     + ConversationParticipantsColumns.PARTICIPANT_ID + ") ON CONFLICT FAIL, "
494                     + "FOREIGN KEY (" + ConversationParticipantsColumns.CONVERSATION_ID + ") "
495                     + "REFERENCES " + CONVERSATIONS_TABLE + "(" + ConversationColumns._ID + ")"
496                     + " ON DELETE CASCADE "
497                     + "FOREIGN KEY (" + ConversationParticipantsColumns.PARTICIPANT_ID + ")"
498                     + " REFERENCES " + PARTICIPANTS_TABLE + "(" + ParticipantColumns._ID + "));";
499 
500     // Primary access pattern for conversation participants is to look them up for a specific
501     // conversation.
502     private static final String CONVERSATION_PARTICIPANTS_TABLE_CONVERSATION_ID_INDEX_SQL =
503             "CREATE INDEX index_" + CONVERSATION_PARTICIPANTS_TABLE + "_"
504                     + ConversationParticipantsColumns.CONVERSATION_ID
505                     + " ON " +  CONVERSATION_PARTICIPANTS_TABLE
506                     + "(" + ConversationParticipantsColumns.CONVERSATION_ID + ")";
507 
508     // View for getting parts which are for draft messages.
509     static final String DRAFT_PARTS_VIEW_SQL = "CREATE VIEW " +
510             DRAFT_PARTS_VIEW + " AS SELECT "
511             + PARTS_TABLE + '.' + PartColumns._ID
512             + " as " + PartColumns._ID + ", "
513             + PARTS_TABLE + '.' + PartColumns.MESSAGE_ID
514             + " as " + PartColumns.MESSAGE_ID + ", "
515             + PARTS_TABLE + '.' + PartColumns.TEXT
516             + " as " + PartColumns.TEXT + ", "
517             + PARTS_TABLE + '.' + PartColumns.CONTENT_URI
518             + " as " + PartColumns.CONTENT_URI + ", "
519             + PARTS_TABLE + '.' + PartColumns.CONTENT_TYPE
520             + " as " + PartColumns.CONTENT_TYPE + ", "
521             + PARTS_TABLE + '.' + PartColumns.WIDTH
522             + " as " + PartColumns.WIDTH + ", "
523             + PARTS_TABLE + '.' + PartColumns.HEIGHT
524             + " as " + PartColumns.HEIGHT + ", "
525             + MESSAGES_TABLE + '.' + MessageColumns.CONVERSATION_ID
526             + " as " + MessageColumns.CONVERSATION_ID + " "
527             + " FROM " + MESSAGES_TABLE + " LEFT JOIN " + PARTS_TABLE + " ON ("
528             + MESSAGES_TABLE + "." + MessageColumns._ID
529             + "=" + PARTS_TABLE + "." + PartColumns.MESSAGE_ID + ")"
530             // Exclude draft messages from main view
531             + " WHERE " + MESSAGES_TABLE + "." + MessageColumns.STATUS
532             + " = " + MessageData.BUGLE_STATUS_OUTGOING_DRAFT;
533 
534     // List of all our SQL tables
535     private static final String[] CREATE_TABLE_SQLS = new String[] {
536         CREATE_CONVERSATIONS_TABLE_SQL,
537         CREATE_MESSAGES_TABLE_SQL,
538         CREATE_PARTS_TABLE_SQL,
539         CREATE_PARTICIPANTS_TABLE_SQL,
540         CREATE_CONVERSATION_PARTICIPANTS_TABLE_SQL,
541     };
542 
543     // List of all our indices
544     private static final String[] CREATE_INDEX_SQLS = new String[] {
545         CONVERSATIONS_TABLE_SMS_THREAD_ID_INDEX_SQL,
546         CONVERSATIONS_TABLE_ARCHIVE_STATUS_INDEX_SQL,
547         CONVERSATIONS_TABLE_SORT_TIMESTAMP_INDEX_SQL,
548         MESSAGES_TABLE_SORT_INDEX_SQL,
549         MESSAGES_TABLE_STATUS_SEEN_INDEX_SQL,
550         PARTS_TABLE_MESSAGE_INDEX_SQL,
551         CONVERSATION_PARTICIPANTS_TABLE_CONVERSATION_ID_INDEX_SQL,
552     };
553 
554     // List of all our SQL triggers
555     private static final String[] CREATE_TRIGGER_SQLS = new String[] {
556             CREATE_PARTS_TRIGGER_SQL,
557             CREATE_MESSAGES_TRIGGER_SQL,
558     };
559 
560     // List of all our views
561     private static final String[] CREATE_VIEW_SQLS = new String[] {
562         ConversationListItemData.getConversationListViewSql(),
563         ConversationImagePartsView.getCreateSql(),
564         DRAFT_PARTS_VIEW_SQL,
565     };
566 
567     private static final Object sLock = new Object();
568     private final Context mApplicationContext;
569     private static DatabaseHelper sHelperInstance;      // Protected by sLock.
570 
571     private final Object mDatabaseWrapperLock = new Object();
572     private DatabaseWrapper mDatabaseWrapper;           // Protected by mDatabaseWrapperLock.
573     private final DatabaseUpgradeHelper mUpgradeHelper = new DatabaseUpgradeHelper();
574 
575     /**
576      * Get a (singleton) instance of {@link DatabaseHelper}, creating one if there isn't one yet.
577      * This is the only public method for getting a new instance of the class.
578      * @param context Should be the application context (or something that will live for the
579      * lifetime of the application).
580      * @return The current (or a new) DatabaseHelper instance.
581      */
getInstance(final Context context)582     public static DatabaseHelper getInstance(final Context context) {
583         synchronized (sLock) {
584             if (sHelperInstance == null) {
585                 sHelperInstance = new DatabaseHelper(context);
586             }
587             return sHelperInstance;
588         }
589     }
590 
591     /**
592      * Private constructor, used from {@link #getInstance()}.
593      * @param context Should be the application context (or something that will live for the
594      * lifetime of the application).
595      */
DatabaseHelper(final Context context)596     private DatabaseHelper(final Context context) {
597         super(context, DATABASE_NAME, null, getDatabaseVersion(context), null);
598         mApplicationContext = context;
599     }
600 
601     /**
602      * Test method that always instantiates a new DatabaseHelper instance. This should
603      * be used ONLY by the tests and never by the real application.
604      * @param context Test context.
605      * @return Brand new DatabaseHelper instance.
606      */
607     @VisibleForTesting
getNewInstanceForTest(final Context context)608     static DatabaseHelper getNewInstanceForTest(final Context context) {
609         Assert.isTrue(BugleApplication.isRunningTests());
610         return new DatabaseHelper(context);
611     }
612 
613     /**
614      * Get the (singleton) instance of @{link DatabaseWrapper}.
615      * <p>The database is always opened as a writeable database.
616      * @return The current (or a new) DatabaseWrapper instance.
617      */
618     @DoesNotRunOnMainThread
getDatabase()619     DatabaseWrapper getDatabase() {
620         // We prevent the main UI thread from accessing the database here since we have to allow
621         // public access to this class to enable sub-packages to access data.
622         Assert.isNotMainThread();
623 
624         synchronized (mDatabaseWrapperLock) {
625             if (mDatabaseWrapper == null) {
626                 mDatabaseWrapper = new DatabaseWrapper(mApplicationContext, getWritableDatabase());
627             }
628             return mDatabaseWrapper;
629         }
630     }
631 
632     @Override
onDowngrade(final SQLiteDatabase db, final int oldVersion, final int newVersion)633     public void onDowngrade(final SQLiteDatabase db, final int oldVersion, final int newVersion) {
634         mUpgradeHelper.onDowngrade(db, oldVersion, newVersion);
635     }
636 
637     /**
638      * Drops and recreates all tables.
639      */
rebuildTables(final SQLiteDatabase db)640     public static void rebuildTables(final SQLiteDatabase db) {
641         // Drop tables first, then views, and indices.
642         dropAllTables(db);
643         dropAllViews(db);
644         dropAllIndexes(db);
645         dropAllTriggers(db);
646 
647         // Recreate the whole database.
648         createDatabase(db);
649     }
650 
651     /**
652      * Drop and rebuild a given view.
653      */
rebuildView(final SQLiteDatabase db, final String viewName, final String createViewSql)654     static void rebuildView(final SQLiteDatabase db, final String viewName,
655             final String createViewSql) {
656         dropView(db, viewName, true /* throwOnFailure */);
657         db.execSQL(createViewSql);
658     }
659 
dropView(final SQLiteDatabase db, final String viewName, final boolean throwOnFailure)660     private static void dropView(final SQLiteDatabase db, final String viewName,
661             final boolean throwOnFailure) {
662         final String dropPrefix = "DROP VIEW IF EXISTS ";
663         try {
664             db.execSQL(dropPrefix + viewName);
665         } catch (final SQLException ex) {
666             if (LogUtil.isLoggable(LogUtil.BUGLE_TAG, LogUtil.DEBUG)) {
667                 LogUtil.d(LogUtil.BUGLE_TAG, "unable to drop view " + viewName + " "
668                         + ex);
669             }
670 
671             if (throwOnFailure) {
672                 throw ex;
673             }
674         }
675     }
676 
rebuildAllViews(final DatabaseWrapper db)677     public static void rebuildAllViews(final DatabaseWrapper db) {
678         for (final String sql : DatabaseHelper.CREATE_VIEW_SQLS) {
679             db.execSQL(sql);
680         }
681     }
682 
683     /**
684      * Drops all user-defined tables from the given database.
685      */
dropAllTables(final SQLiteDatabase db)686     private static void dropAllTables(final SQLiteDatabase db) {
687         final Cursor tableCursor =
688                 db.query(PRIMARY_TABLE, PRIMARY_COLUMNS, "type='table'", null, null, null, null);
689         if (tableCursor != null) {
690             try {
691                 final String dropPrefix = "DROP TABLE IF EXISTS ";
692                 while (tableCursor.moveToNext()) {
693                     final String tableName = tableCursor.getString(0);
694 
695                     // Skip special tables
696                     if (tableName.startsWith("android_") || tableName.startsWith("sqlite_")) {
697                         continue;
698                     }
699                     try {
700                         db.execSQL(dropPrefix + tableName);
701                     } catch (final SQLException ex) {
702                         if (LogUtil.isLoggable(LogUtil.BUGLE_TAG, LogUtil.DEBUG)) {
703                             LogUtil.d(LogUtil.BUGLE_TAG, "unable to drop table " + tableName + " "
704                                     + ex);
705                         }
706                     }
707                 }
708             } finally {
709                 tableCursor.close();
710             }
711         }
712     }
713 
714     /**
715      * Drops all user-defined triggers from the given database.
716      */
dropAllTriggers(final SQLiteDatabase db)717     private static void dropAllTriggers(final SQLiteDatabase db) {
718         final Cursor triggerCursor =
719                 db.query(PRIMARY_TABLE, PRIMARY_COLUMNS, "type='trigger'", null, null, null, null);
720         if (triggerCursor != null) {
721             try {
722                 final String dropPrefix = "DROP TRIGGER IF EXISTS ";
723                 while (triggerCursor.moveToNext()) {
724                     final String triggerName = triggerCursor.getString(0);
725 
726                     // Skip special tables
727                     if (triggerName.startsWith("android_") || triggerName.startsWith("sqlite_")) {
728                         continue;
729                     }
730                     try {
731                         db.execSQL(dropPrefix + triggerName);
732                     } catch (final SQLException ex) {
733                         if (LogUtil.isLoggable(LogUtil.BUGLE_TAG, LogUtil.DEBUG)) {
734                             LogUtil.d(LogUtil.BUGLE_TAG, "unable to drop trigger " + triggerName +
735                                     " " + ex);
736                         }
737                     }
738                 }
739             } finally {
740                 triggerCursor.close();
741             }
742         }
743     }
744 
745     /**
746      * Drops all user-defined views from the given database.
747      */
dropAllViews(final SQLiteDatabase db)748     public static void dropAllViews(final SQLiteDatabase db) {
749         final Cursor viewCursor =
750                 db.query(PRIMARY_TABLE, PRIMARY_COLUMNS, "type='view'", null, null, null, null);
751         if (viewCursor != null) {
752             try {
753                 while (viewCursor.moveToNext()) {
754                     final String viewName = viewCursor.getString(0);
755                     dropView(db, viewName, false /* throwOnFailure */);
756                 }
757             } finally {
758                 viewCursor.close();
759             }
760         }
761     }
762 
763     /**
764      * Drops all user-defined views from the given database.
765      */
dropAllIndexes(final SQLiteDatabase db)766     private static void dropAllIndexes(final SQLiteDatabase db) {
767         final Cursor indexCursor =
768                 db.query(PRIMARY_TABLE, PRIMARY_COLUMNS, "type='index'", null, null, null, null);
769         if (indexCursor != null) {
770             try {
771                 final String dropPrefix = "DROP INDEX IF EXISTS ";
772                 while (indexCursor.moveToNext()) {
773                     final String indexName = indexCursor.getString(0);
774                     try {
775                         db.execSQL(dropPrefix + indexName);
776                     } catch (final SQLException ex) {
777                         if (LogUtil.isLoggable(LogUtil.BUGLE_TAG, LogUtil.DEBUG)) {
778                             LogUtil.d(LogUtil.BUGLE_TAG, "unable to drop index " + indexName + " "
779                                     + ex);
780                         }
781                     }
782                 }
783             } finally {
784                 indexCursor.close();
785             }
786         }
787     }
788 
createDatabase(final SQLiteDatabase db)789     private static void createDatabase(final SQLiteDatabase db) {
790         for (final String sql : CREATE_TABLE_SQLS) {
791             db.execSQL(sql);
792         }
793 
794         for (final String sql : CREATE_INDEX_SQLS) {
795             db.execSQL(sql);
796         }
797 
798         for (final String sql : CREATE_VIEW_SQLS) {
799             db.execSQL(sql);
800         }
801 
802         for (final String sql : CREATE_TRIGGER_SQLS) {
803             db.execSQL(sql);
804         }
805 
806         // Enable foreign key constraints
807         db.execSQL("PRAGMA foreign_keys=ON;");
808 
809         // Add the default self participant. The default self will be assigned a proper slot id
810         // during participant refresh.
811         db.execSQL(getCreateSelfParticipantSql(ParticipantData.DEFAULT_SELF_SUB_ID));
812 
813         DataModel.get().onCreateTables(db);
814     }
815 
816     @Override
onCreate(SQLiteDatabase db)817     public void onCreate(SQLiteDatabase db) {
818         createDatabase(db);
819     }
820 
821     @Override
onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)822     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
823         mUpgradeHelper.doOnUpgrade(db, oldVersion, newVersion);
824     }
825 }
826