Conversation.java revision 25b939e5a7ecb1e0879b684dc5bc55183cf468b4
1package com.android.mms.data; 2 3import java.util.HashSet; 4import java.util.Iterator; 5import java.util.Set; 6 7import android.content.AsyncQueryHandler; 8import android.content.ContentUris; 9import android.content.ContentValues; 10import android.content.Context; 11import android.database.Cursor; 12import android.net.Uri; 13import android.provider.Telephony.MmsSms; 14import android.provider.Telephony.Threads; 15import android.provider.Telephony.Sms.Conversations; 16import android.text.TextUtils; 17import android.util.Log; 18 19import com.android.mms.R; 20import com.android.mms.LogTag; 21import com.android.mms.transaction.MessagingNotification; 22import com.android.mms.ui.MessageUtils; 23import com.android.mms.util.DraftCache; 24 25/** 26 * An interface for finding information about conversations and/or creating new ones. 27 */ 28public class Conversation { 29 private static final String TAG = "Mms/conv"; 30 private static final boolean DEBUG = false; 31 32 private static final Uri sAllThreadsUri = 33 Threads.CONTENT_URI.buildUpon().appendQueryParameter("simple", "true").build(); 34 35 private static final String[] ALL_THREADS_PROJECTION = { 36 Threads._ID, Threads.DATE, Threads.MESSAGE_COUNT, Threads.RECIPIENT_IDS, 37 Threads.SNIPPET, Threads.SNIPPET_CHARSET, Threads.READ, Threads.ERROR, 38 Threads.HAS_ATTACHMENT 39 }; 40 private static final int ID = 0; 41 private static final int DATE = 1; 42 private static final int MESSAGE_COUNT = 2; 43 private static final int RECIPIENT_IDS = 3; 44 private static final int SNIPPET = 4; 45 private static final int SNIPPET_CS = 5; 46 private static final int READ = 6; 47 private static final int ERROR = 7; 48 private static final int HAS_ATTACHMENT = 8; 49 50 51 private final Context mContext; 52 53 // The thread ID of this conversation. Can be zero in the case of a 54 // new conversation where the recipient set is changing as the user 55 // types and we have not hit the database yet to create a thread. 56 private long mThreadId; 57 58 private ContactList mRecipients; // The current set of recipients. 59 private long mDate; // The last update time. 60 private int mMessageCount; // Number of messages. 61 private String mSnippet; // Text of the most recent message. 62 private boolean mHasUnreadMessages; // True if there are unread messages. 63 private boolean mHasAttachment; // True if any message has an attachment. 64 private boolean mHasError; // True if any message is in an error state. 65 66 private static ContentValues mReadContentValues; 67 68 69 private Conversation(Context context) { 70 mContext = context; 71 mRecipients = new ContactList(); 72 mThreadId = 0; 73 } 74 75 private Conversation(Context context, long threadId) { 76 mContext = context; 77 if (!loadFromThreadId(threadId)) { 78 mRecipients = new ContactList(); 79 mThreadId = 0; 80 } 81 } 82 83 private Conversation(Context context, Cursor cursor, boolean allowQuery) { 84 mContext = context; 85 fillFromCursor(context, this, cursor, allowQuery); 86 } 87 88 /** 89 * Create a new conversation with no recipients. {@link setRecipients} can 90 * be called as many times as you like; the conversation will not be 91 * created in the database until {@link ensureThreadId} is called. 92 */ 93 public static Conversation createNew(Context context) { 94 return new Conversation(context); 95 } 96 97 /** 98 * Find the conversation matching the provided thread ID. 99 */ 100 public static Conversation get(Context context, long threadId) { 101 synchronized (Cache.getInstance()) { 102 Conversation conv = Cache.get(threadId); 103 if (conv != null) 104 return conv; 105 106 conv = new Conversation(context, threadId); 107 try { 108 Cache.put(conv); 109 } catch (IllegalStateException e) { 110 LogTag.error("Tried to add duplicate Conversation to Cache"); 111 } 112 return conv; 113 } 114 } 115 116 /** 117 * Find the conversation matching the provided recipient set. 118 * When called with an empty recipient list, equivalent to {@link createEmpty}. 119 */ 120 public static Conversation get(Context context, ContactList recipients) { 121 // If there are no recipients in the list, make a new conversation. 122 if (recipients.size() < 1) { 123 return createNew(context); 124 } 125 126 synchronized (Cache.getInstance()) { 127 Conversation conv = Cache.get(recipients); 128 if (conv != null) 129 return conv; 130 131 long threadId = getOrCreateThreadId(context, recipients); 132 conv = new Conversation(context, threadId); 133 134 Cache.put(conv); 135 return conv; 136 } 137 } 138 139 /** 140 * Find the conversation matching in the specified Uri. Example 141 * forms: {@value content://mms-sms/conversations/3} or 142 * {@value sms:+12124797990}. 143 * When called with a null Uri, equivalent to {@link createEmpty}. 144 */ 145 public static Conversation get(Context context, Uri uri) { 146 if (uri == null) { 147 return createNew(context); 148 } 149 150 if (DEBUG) { 151 Log.v(TAG, "Conversation get URI: " + uri); 152 } 153 // Handle a conversation URI 154 if (uri.getPathSegments().size() >= 2) { 155 try { 156 long threadId = Long.parseLong(uri.getPathSegments().get(1)); 157 if (DEBUG) { 158 Log.v(TAG, "Conversation get threadId: " + threadId); 159 } 160 return get(context, threadId); 161 } catch (NumberFormatException exception) { 162 LogTag.error("Invalid URI: " + uri); 163 } 164 } 165 166 String recipient = uri.getSchemeSpecificPart(); 167 return get(context, ContactList.getByNumbers(recipient, false)); 168 } 169 170 /** 171 * Returns true if the recipient in the uri matches the recipient list in this 172 * conversation. 173 */ 174 public boolean sameRecipient(Uri uri) { 175 int size = mRecipients.size(); 176 if (size > 1) { 177 return false; 178 } 179 if (uri == null) { 180 return size == 0; 181 } 182 if (uri.getPathSegments().size() >= 2) { 183 return false; // it's a thread id for a conversation 184 } 185 String recipient = uri.getSchemeSpecificPart(); 186 ContactList incomingRecipient = ContactList.getByNumbers(recipient, false); 187 return mRecipients.equals(incomingRecipient); 188 } 189 190 /** 191 * Returns a temporary Conversation (not representing one on disk) wrapping 192 * the contents of the provided cursor. The cursor should be the one 193 * returned to your AsyncQueryHandler passed in to {@link startQueryForAll}. 194 * The recipient list of this conversation can be empty if the results 195 * were not in cache. 196 */ 197 // TODO: check why can't load a cached Conversation object here. 198 public static Conversation from(Context context, Cursor cursor) { 199 return new Conversation(context, cursor, false); 200 } 201 202 private void buildReadContentValues() { 203 if (mReadContentValues == null) { 204 mReadContentValues = new ContentValues(1); 205 mReadContentValues.put("read", 1); 206 } 207 } 208 209 /** 210 * Marks all messages in this conversation as read and updates 211 * relevant notifications. This method returns immediately; 212 * work is dispatched to a background thread. 213 */ 214 public synchronized void markAsRead() { 215 // If we have no Uri to mark (as in the case of a conversation that 216 // has not yet made its way to disk), there's nothing to do. 217 final Uri threadUri = getUri(); 218 219 new Thread(new Runnable() { 220 public void run() { 221 if (threadUri != null) { 222 buildReadContentValues(); 223 mContext.getContentResolver().update(threadUri, mReadContentValues, 224 "read=0", null); 225 mHasUnreadMessages = false; 226 } 227 // Always update notifications regardless of the read state. 228 MessagingNotification.updateAllNotifications(mContext); 229 } 230 }).start(); 231 } 232 233 /** 234 * Returns a content:// URI referring to this conversation, 235 * or null if it does not exist on disk yet. 236 */ 237 public synchronized Uri getUri() { 238 if (mThreadId <= 0) 239 return null; 240 241 return ContentUris.withAppendedId(Threads.CONTENT_URI, mThreadId); 242 } 243 244 /** 245 * Return the Uri for all messages in the given thread ID. 246 * @deprecated 247 */ 248 public static Uri getUri(long threadId) { 249 // TODO: Callers using this should really just have a Conversation 250 // and call getUri() on it, but this guarantees no blocking. 251 return ContentUris.withAppendedId(Threads.CONTENT_URI, threadId); 252 } 253 254 /** 255 * Returns the thread ID of this conversation. Can be zero if 256 * {@link ensureThreadId} has not been called yet. 257 */ 258 public synchronized long getThreadId() { 259 return mThreadId; 260 } 261 262 /** 263 * Guarantees that the conversation has been created in the database. 264 * This will make a blocking database call if it hasn't. 265 * 266 * @return The thread ID of this conversation in the database 267 */ 268 public synchronized long ensureThreadId() { 269 if (DEBUG) { 270 LogTag.debug("ensureThreadId before: " + mThreadId); 271 } 272 if (mThreadId <= 0) { 273 mThreadId = getOrCreateThreadId(mContext, mRecipients); 274 } 275 if (DEBUG) { 276 LogTag.debug("ensureThreadId after: " + mThreadId); 277 } 278 279 return mThreadId; 280 } 281 282 public synchronized void clearThreadId() { 283 // remove ourself from the cache 284 if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) { 285 LogTag.debug("clearThreadId old threadId was: " + mThreadId + " now zero"); 286 } 287 Cache.remove(mThreadId); 288 289 mThreadId = 0; 290 } 291 292 /** 293 * Sets the list of recipients associated with this conversation. 294 * If called, {@link ensureThreadId} must be called before the next 295 * operation that depends on this conversation existing in the 296 * database (e.g. storing a draft message to it). 297 */ 298 public synchronized void setRecipients(ContactList list) { 299 mRecipients = list; 300 301 // Invalidate thread ID because the recipient set has changed. 302 mThreadId = 0; 303 } 304 305 /** 306 * Returns the recipient set of this conversation. 307 */ 308 public synchronized ContactList getRecipients() { 309 return mRecipients; 310 } 311 312 /** 313 * Returns true if a draft message exists in this conversation. 314 */ 315 public synchronized boolean hasDraft() { 316 if (mThreadId <= 0) 317 return false; 318 319 return DraftCache.getInstance().hasDraft(mThreadId); 320 } 321 322 /** 323 * Sets whether or not this conversation has a draft message. 324 */ 325 public synchronized void setDraftState(boolean hasDraft) { 326 if (mThreadId <= 0) 327 return; 328 329 DraftCache.getInstance().setDraftState(mThreadId, hasDraft); 330 } 331 332 /** 333 * Returns the time of the last update to this conversation in milliseconds, 334 * on the {@link System.currentTimeMillis} timebase. 335 */ 336 public synchronized long getDate() { 337 return mDate; 338 } 339 340 /** 341 * Returns the number of messages in this conversation, excluding the draft 342 * (if it exists). 343 */ 344 public synchronized int getMessageCount() { 345 return mMessageCount; 346 } 347 348 /** 349 * Returns a snippet of text from the most recent message in the conversation. 350 */ 351 public synchronized String getSnippet() { 352 return mSnippet; 353 } 354 355 /** 356 * Returns true if there are any unread messages in the conversation. 357 */ 358 public synchronized boolean hasUnreadMessages() { 359 return mHasUnreadMessages; 360 } 361 362 /** 363 * Returns true if any messages in the conversation have attachments. 364 */ 365 public synchronized boolean hasAttachment() { 366 return mHasAttachment; 367 } 368 369 /** 370 * Returns true if any messages in the conversation are in an error state. 371 */ 372 public synchronized boolean hasError() { 373 return mHasError; 374 } 375 376 private static long getOrCreateThreadId(Context context, ContactList list) { 377 HashSet<String> recipients = new HashSet<String>(); 378 Contact cacheContact = null; 379 for (Contact c : list) { 380 cacheContact = Contact.get(c.getNumber(),true); 381 if (cacheContact != null) { 382 recipients.add(cacheContact.getNumber()); 383 } else { 384 recipients.add(c.getNumber()); 385 } 386 } 387 if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) { 388 LogTag.debug("getOrCreateThreadId %s", recipients); 389 } 390 return Threads.getOrCreateThreadId(context, recipients); 391 } 392 393 /* 394 * The primary key of a conversation is its recipient set; override 395 * equals() and hashCode() to just pass through to the internal 396 * recipient sets. 397 */ 398 @Override 399 public synchronized boolean equals(Object obj) { 400 try { 401 Conversation other = (Conversation)obj; 402 return (mRecipients.equals(other.mRecipients)); 403 } catch (ClassCastException e) { 404 return false; 405 } 406 } 407 408 @Override 409 public synchronized int hashCode() { 410 return mRecipients.hashCode(); 411 } 412 413 @Override 414 public synchronized String toString() { 415 return String.format("[%s] (tid %d)", mRecipients.serialize(), mThreadId); 416 } 417 418 /** 419 * Remove any obsolete conversations sitting around on disk. 420 * @deprecated 421 */ 422 public static void cleanup(Context context) { 423 // TODO: Get rid of this awful hack. 424 context.getContentResolver().delete(Threads.OBSOLETE_THREADS_URI, null, null); 425 } 426 427 /** 428 * Start a query for all conversations in the database on the specified 429 * AsyncQueryHandler. 430 * 431 * @param handler An AsyncQueryHandler that will receive onQueryComplete 432 * upon completion of the query 433 * @param token The token that will be passed to onQueryComplete 434 */ 435 public static void startQueryForAll(AsyncQueryHandler handler, int token) { 436 handler.cancelOperation(token); 437 handler.startQuery(token, null, sAllThreadsUri, 438 ALL_THREADS_PROJECTION, null, null, Conversations.DEFAULT_SORT_ORDER); 439 } 440 441 /** 442 * Start a delete of the conversation with the specified thread ID. 443 * 444 * @param handler An AsyncQueryHandler that will receive onDeleteComplete 445 * upon completion of the conversation being deleted 446 * @param token The token that will be passed to onDeleteComplete 447 * @param deleteAll Delete the whole thread including locked messages 448 * @param threadId Thread ID of the conversation to be deleted 449 */ 450 public static void startDelete(AsyncQueryHandler handler, int token, boolean deleteAll, 451 long threadId) { 452 Uri uri = ContentUris.withAppendedId(Threads.CONTENT_URI, threadId); 453 String selection = deleteAll ? null : "locked=0"; 454 handler.startDelete(token, null, uri, selection, null); 455 } 456 457 /** 458 * Start deleting all conversations in the database. 459 * @param handler An AsyncQueryHandler that will receive onDeleteComplete 460 * upon completion of all conversations being deleted 461 * @param token The token that will be passed to onDeleteComplete 462 * @param deleteAll Delete the whole thread including locked messages 463 */ 464 public static void startDeleteAll(AsyncQueryHandler handler, int token, boolean deleteAll) { 465 String selection = deleteAll ? null : "locked=0"; 466 handler.startDelete(token, null, Threads.CONTENT_URI, selection, null); 467 } 468 469 /** 470 * Check for locked messages in all threads or a specified thread. 471 * @param handler An AsyncQueryHandler that will receive onQueryComplete 472 * upon completion of looking for locked messages 473 * @param threadId The threadId of the thread to search. -1 means all threads 474 * @param token The token that will be passed to onQueryComplete 475 */ 476 public static void startQueryHaveLockedMessages(AsyncQueryHandler handler, long threadId, 477 int token) { 478 handler.cancelOperation(token); 479 Uri uri = MmsSms.CONTENT_LOCKED_URI; 480 if (threadId != -1) { 481 uri = ContentUris.withAppendedId(uri, threadId); 482 } 483 handler.startQuery(token, new Long(threadId), uri, 484 ALL_THREADS_PROJECTION, null, null, Conversations.DEFAULT_SORT_ORDER); 485 } 486 487 /** 488 * Fill the specified conversation with the values from the specified 489 * cursor, possibly setting recipients to empty if {@value allowQuery} 490 * is false and the recipient IDs are not in cache. The cursor should 491 * be one made via {@link startQueryForAll}. 492 */ 493 private static void fillFromCursor(Context context, Conversation conv, 494 Cursor c, boolean allowQuery) { 495 synchronized (conv) { 496 conv.mThreadId = c.getLong(ID); 497 conv.mDate = c.getLong(DATE); 498 conv.mMessageCount = c.getInt(MESSAGE_COUNT); 499 500 // Replace the snippet with a default value if it's empty. 501 String snippet = MessageUtils.extractEncStrFromCursor(c, SNIPPET, SNIPPET_CS); 502 if (TextUtils.isEmpty(snippet)) { 503 snippet = context.getString(R.string.no_subject_view); 504 } 505 conv.mSnippet = snippet; 506 507 conv.mHasUnreadMessages = (c.getInt(READ) == 0); 508 conv.mHasError = (c.getInt(ERROR) != 0); 509 conv.mHasAttachment = (c.getInt(HAS_ATTACHMENT) != 0); 510 511 String recipientIds = c.getString(RECIPIENT_IDS); 512 conv.mRecipients = ContactList.getByIds(recipientIds, allowQuery); 513 } 514 } 515 516 /** 517 * Private cache for the use of the various forms of Conversation.get. 518 */ 519 private static class Cache { 520 private static Cache sInstance = new Cache(); 521 static Cache getInstance() { return sInstance; } 522 private final HashSet<Conversation> mCache; 523 private Cache() { 524 mCache = new HashSet<Conversation>(10); 525 } 526 527 /** 528 * Return the conversation with the specified thread ID, or 529 * null if it's not in cache. 530 */ 531 static Conversation get(long threadId) { 532 synchronized (sInstance) { 533 if (DEBUG) { 534 LogTag.debug("Conversation get with threadId: " + threadId); 535 } 536 dumpCache(); 537 for (Conversation c : sInstance.mCache) { 538 if (DEBUG) { 539 LogTag.debug("Conversation get() threadId: " + threadId + 540 " c.getThreadId(): " + c.getThreadId()); 541 } 542 if (c.getThreadId() == threadId) { 543 return c; 544 } 545 } 546 } 547 return null; 548 } 549 550 /** 551 * Return the conversation with the specified recipient 552 * list, or null if it's not in cache. 553 */ 554 static Conversation get(ContactList list) { 555 synchronized (sInstance) { 556 if (DEBUG) { 557 LogTag.debug("Conversation get with ContactList: " + list); 558 dumpCache(); 559 } 560 for (Conversation c : sInstance.mCache) { 561 if (c.getRecipients().equals(list)) { 562 return c; 563 } 564 } 565 } 566 return null; 567 } 568 569 /** 570 * Put the specified conversation in the cache. The caller 571 * should not place an already-existing conversation in the 572 * cache, but rather update it in place. 573 */ 574 static void put(Conversation c) { 575 synchronized (sInstance) { 576 // We update cache entries in place so people with long- 577 // held references get updated. 578 if (DEBUG) { 579 LogTag.debug("Conversation c: " + c + " put with threadid: " + c.getThreadId() + 580 " c.hash: " + c.hashCode()); 581 dumpCache(); 582 } 583 584 if (sInstance.mCache.contains(c)) { 585 throw new IllegalStateException("cache already contains " + c + 586 " threadId: " + c.mThreadId); 587 } 588 sInstance.mCache.add(c); 589 } 590 } 591 592 static void remove(long threadId) { 593 if (DEBUG) { 594 LogTag.debug("remove threadid: " + threadId); 595 dumpCache(); 596 } 597 for (Conversation c : sInstance.mCache) { 598 if (c.getThreadId() == threadId) { 599 sInstance.mCache.remove(c); 600 return; 601 } 602 } 603 } 604 605 static void dumpCache() { 606 if (DEBUG) { 607 synchronized (sInstance) { 608 LogTag.debug("Conversation dumpCache: "); 609 for (Conversation c : sInstance.mCache) { 610 LogTag.debug(" c: " + c + " c.getThreadId(): " + c.getThreadId() + 611 " hash: " + c.hashCode()); 612 } 613 } 614 } 615 } 616 617 /** 618 * Remove all conversations from the cache that are not in 619 * the provided set of thread IDs. 620 */ 621 static void keepOnly(Set<Long> threads) { 622 synchronized (sInstance) { 623 Iterator<Conversation> iter = sInstance.mCache.iterator(); 624 while (iter.hasNext()) { 625 Conversation c = iter.next(); 626 if (!threads.contains(c.getThreadId())) { 627 iter.remove(); 628 } 629 } 630 } 631 } 632 } 633 634 /** 635 * Set up the conversation cache. To be called once at application 636 * startup time. 637 */ 638 public static void init(final Context context) { 639 new Thread(new Runnable() { 640 public void run() { 641 cacheAllThreads(context); 642 } 643 }).start(); 644 } 645 646 private static void cacheAllThreads(Context context) { 647 synchronized (Cache.getInstance()) { 648 if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) { 649 LogTag.debug("[Conversation] cacheAllThreads"); 650 } 651 // Keep track of what threads are now on disk so we 652 // can discard anything removed from the cache. 653 HashSet<Long> threadsOnDisk = new HashSet<Long>(); 654 655 // Query for all conversations. 656 Cursor c = context.getContentResolver().query(sAllThreadsUri, 657 ALL_THREADS_PROJECTION, null, null, null); 658 try { 659 while (c.moveToNext()) { 660 long threadId = c.getLong(ID); 661 threadsOnDisk.add(threadId); 662 663 // Try to find this thread ID in the cache. 664 Conversation conv = Cache.get(threadId); 665 666 if (conv == null) { 667 // Make a new Conversation and put it in 668 // the cache if necessary. 669 conv = new Conversation(context, c, true); 670 try { 671 Cache.put(conv); 672 } catch (IllegalStateException e) { 673 LogTag.error("Tried to add duplicate Conversation to Cache"); 674 } 675 } else { 676 // Or update in place so people with references 677 // to conversations get updated too. 678 fillFromCursor(context, conv, c, true); 679 } 680 } 681 } finally { 682 c.close(); 683 } 684 685 // Purge the cache of threads that no longer exist on disk. 686 Cache.keepOnly(threadsOnDisk); 687 } 688 } 689 690 private boolean loadFromThreadId(long threadId) { 691 Cursor c = mContext.getContentResolver().query(sAllThreadsUri, ALL_THREADS_PROJECTION, 692 "_id=" + Long.toString(threadId), null, null); 693 try { 694 if (c.moveToFirst()) { 695 fillFromCursor(mContext, this, c, true); 696 } else { 697 LogTag.error("loadFromThreadId: Can't find thread ID " + threadId); 698 return false; 699 } 700 } finally { 701 c.close(); 702 } 703 return true; 704 } 705} 706