1package eu.siacs.conversations.entities;
2
3import android.content.ContentValues;
4import android.database.Cursor;
5import android.text.SpannableStringBuilder;
6
7import com.vdurmont.emoji.EmojiManager;
8
9import java.net.MalformedURLException;
10import java.net.URL;
11
12import eu.siacs.conversations.Config;
13import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
14import eu.siacs.conversations.http.AesGcmURLStreamHandler;
15import eu.siacs.conversations.ui.adapter.MessageAdapter;
16import eu.siacs.conversations.utils.CryptoHelper;
17import eu.siacs.conversations.utils.GeoHelper;
18import eu.siacs.conversations.utils.MimeUtils;
19import eu.siacs.conversations.utils.UIHelper;
20import eu.siacs.conversations.xmpp.jid.InvalidJidException;
21import eu.siacs.conversations.xmpp.jid.Jid;
22
23public class Message extends AbstractEntity {
24
25 public static final String TABLENAME = "messages";
26
27 public static final int STATUS_RECEIVED = 0;
28 public static final int STATUS_UNSEND = 1;
29 public static final int STATUS_SEND = 2;
30 public static final int STATUS_SEND_FAILED = 3;
31 public static final int STATUS_WAITING = 5;
32 public static final int STATUS_OFFERED = 6;
33 public static final int STATUS_SEND_RECEIVED = 7;
34 public static final int STATUS_SEND_DISPLAYED = 8;
35
36 public static final int ENCRYPTION_NONE = 0;
37 public static final int ENCRYPTION_PGP = 1;
38 public static final int ENCRYPTION_OTR = 2;
39 public static final int ENCRYPTION_DECRYPTED = 3;
40 public static final int ENCRYPTION_DECRYPTION_FAILED = 4;
41 public static final int ENCRYPTION_AXOLOTL = 5;
42
43 public static final int TYPE_TEXT = 0;
44 public static final int TYPE_IMAGE = 1;
45 public static final int TYPE_FILE = 2;
46 public static final int TYPE_STATUS = 3;
47 public static final int TYPE_PRIVATE = 4;
48
49 public static final String CONVERSATION = "conversationUuid";
50 public static final String COUNTERPART = "counterpart";
51 public static final String TRUE_COUNTERPART = "trueCounterpart";
52 public static final String BODY = "body";
53 public static final String TIME_SENT = "timeSent";
54 public static final String ENCRYPTION = "encryption";
55 public static final String STATUS = "status";
56 public static final String TYPE = "type";
57 public static final String CARBON = "carbon";
58 public static final String OOB = "oob";
59 public static final String EDITED = "edited";
60 public static final String REMOTE_MSG_ID = "remoteMsgId";
61 public static final String SERVER_MSG_ID = "serverMsgId";
62 public static final String RELATIVE_FILE_PATH = "relativeFilePath";
63 public static final String FINGERPRINT = "axolotl_fingerprint";
64 public static final String READ = "read";
65 public static final String ERROR_MESSAGE = "errorMsg";
66 public static final String ME_COMMAND = "/me ";
67
68
69 public boolean markable = false;
70 protected String conversationUuid;
71 protected Jid counterpart;
72 protected Jid trueCounterpart;
73 protected String body;
74 protected String encryptedBody;
75 protected long timeSent;
76 protected int encryption;
77 protected int status;
78 protected int type;
79 protected boolean carbon = false;
80 protected boolean oob = false;
81 protected String edited = null;
82 protected String relativeFilePath;
83 protected boolean read = true;
84 protected String remoteMsgId = null;
85 protected String serverMsgId = null;
86 private final Conversation conversation;
87 protected Transferable transferable = null;
88 private Message mNextMessage = null;
89 private Message mPreviousMessage = null;
90 private String axolotlFingerprint = null;
91 private String errorMessage = null;
92
93 private Boolean isGeoUri = null;
94 private Boolean isEmojisOnly = null;
95 private Boolean treatAsDownloadable = null;
96 private FileParams fileParams = null;
97
98 private Message(Conversation conversation) {
99 this.conversation = conversation;
100 }
101
102 public Message(Conversation conversation, String body, int encryption) {
103 this(conversation, body, encryption, STATUS_UNSEND);
104 }
105
106 public Message(Conversation conversation, String body, int encryption, int status) {
107 this(conversation, java.util.UUID.randomUUID().toString(),
108 conversation.getUuid(),
109 conversation.getJid() == null ? null : conversation.getJid().toBareJid(),
110 null,
111 body,
112 System.currentTimeMillis(),
113 encryption,
114 status,
115 TYPE_TEXT,
116 false,
117 null,
118 null,
119 null,
120 null,
121 true,
122 null,
123 false,
124 null);
125 }
126
127 private Message(final Conversation conversation, final String uuid, final String conversationUUid, final Jid counterpart,
128 final Jid trueCounterpart, final String body, final long timeSent,
129 final int encryption, final int status, final int type, final boolean carbon,
130 final String remoteMsgId, final String relativeFilePath,
131 final String serverMsgId, final String fingerprint, final boolean read,
132 final String edited, final boolean oob, final String errorMessage) {
133 this.conversation = conversation;
134 this.uuid = uuid;
135 this.conversationUuid = conversationUUid;
136 this.counterpart = counterpart;
137 this.trueCounterpart = trueCounterpart;
138 this.body = body == null ? "" : body;
139 this.timeSent = timeSent;
140 this.encryption = encryption;
141 this.status = status;
142 this.type = type;
143 this.carbon = carbon;
144 this.remoteMsgId = remoteMsgId;
145 this.relativeFilePath = relativeFilePath;
146 this.serverMsgId = serverMsgId;
147 this.axolotlFingerprint = fingerprint;
148 this.read = read;
149 this.edited = edited;
150 this.oob = oob;
151 this.errorMessage = errorMessage;
152 }
153
154 public static Message fromCursor(Cursor cursor, Conversation conversation) {
155 Jid jid;
156 try {
157 String value = cursor.getString(cursor.getColumnIndex(COUNTERPART));
158 if (value != null) {
159 jid = Jid.fromString(value, true);
160 } else {
161 jid = null;
162 }
163 } catch (InvalidJidException e) {
164 jid = null;
165 } catch (IllegalStateException e) {
166 return null; // message too long?
167 }
168 Jid trueCounterpart;
169 try {
170 String value = cursor.getString(cursor.getColumnIndex(TRUE_COUNTERPART));
171 if (value != null) {
172 trueCounterpart = Jid.fromString(value, true);
173 } else {
174 trueCounterpart = null;
175 }
176 } catch (InvalidJidException e) {
177 trueCounterpart = null;
178 }
179 return new Message(conversation,
180 cursor.getString(cursor.getColumnIndex(UUID)),
181 cursor.getString(cursor.getColumnIndex(CONVERSATION)),
182 jid,
183 trueCounterpart,
184 cursor.getString(cursor.getColumnIndex(BODY)),
185 cursor.getLong(cursor.getColumnIndex(TIME_SENT)),
186 cursor.getInt(cursor.getColumnIndex(ENCRYPTION)),
187 cursor.getInt(cursor.getColumnIndex(STATUS)),
188 cursor.getInt(cursor.getColumnIndex(TYPE)),
189 cursor.getInt(cursor.getColumnIndex(CARBON)) > 0,
190 cursor.getString(cursor.getColumnIndex(REMOTE_MSG_ID)),
191 cursor.getString(cursor.getColumnIndex(RELATIVE_FILE_PATH)),
192 cursor.getString(cursor.getColumnIndex(SERVER_MSG_ID)),
193 cursor.getString(cursor.getColumnIndex(FINGERPRINT)),
194 cursor.getInt(cursor.getColumnIndex(READ)) > 0,
195 cursor.getString(cursor.getColumnIndex(EDITED)),
196 cursor.getInt(cursor.getColumnIndex(OOB)) > 0,
197 cursor.getString(cursor.getColumnIndex(ERROR_MESSAGE)));
198 }
199
200 public static Message createStatusMessage(Conversation conversation, String body) {
201 final Message message = new Message(conversation);
202 message.setType(Message.TYPE_STATUS);
203 message.body = body;
204 return message;
205 }
206
207 public static Message createLoadMoreMessage(Conversation conversation) {
208 final Message message = new Message(conversation);
209 message.setType(Message.TYPE_STATUS);
210 message.body = "LOAD_MORE";
211 return message;
212 }
213
214 public static Message createDateSeparator(Message message) {
215 final Message separator = new Message(message.getConversation());
216 separator.setType(Message.TYPE_STATUS);
217 separator.body = MessageAdapter.DATE_SEPARATOR_BODY;
218 separator.setTime(message.getTimeSent());
219 return separator;
220 }
221
222 @Override
223 public ContentValues getContentValues() {
224 ContentValues values = new ContentValues();
225 values.put(UUID, uuid);
226 values.put(CONVERSATION, conversationUuid);
227 if (counterpart == null) {
228 values.putNull(COUNTERPART);
229 } else {
230 values.put(COUNTERPART, counterpart.toPreppedString());
231 }
232 if (trueCounterpart == null) {
233 values.putNull(TRUE_COUNTERPART);
234 } else {
235 values.put(TRUE_COUNTERPART, trueCounterpart.toPreppedString());
236 }
237 values.put(BODY, body.length() > Config.MAX_STORAGE_MESSAGE_CHARS ? body.substring(0,Config.MAX_STORAGE_MESSAGE_CHARS) : body);
238 values.put(TIME_SENT, timeSent);
239 values.put(ENCRYPTION, encryption);
240 values.put(STATUS, status);
241 values.put(TYPE, type);
242 values.put(CARBON, carbon ? 1 : 0);
243 values.put(REMOTE_MSG_ID, remoteMsgId);
244 values.put(RELATIVE_FILE_PATH, relativeFilePath);
245 values.put(SERVER_MSG_ID, serverMsgId);
246 values.put(FINGERPRINT, axolotlFingerprint);
247 values.put(READ,read ? 1 : 0);
248 values.put(EDITED, edited);
249 values.put(OOB, oob ? 1 : 0);
250 values.put(ERROR_MESSAGE,errorMessage);
251 return values;
252 }
253
254 public String getConversationUuid() {
255 return conversationUuid;
256 }
257
258 public Conversation getConversation() {
259 return this.conversation;
260 }
261
262 public Jid getCounterpart() {
263 return counterpart;
264 }
265
266 public void setCounterpart(final Jid counterpart) {
267 this.counterpart = counterpart;
268 }
269
270 public Contact getContact() {
271 if (this.conversation.getMode() == Conversation.MODE_SINGLE) {
272 return this.conversation.getContact();
273 } else {
274 if (this.trueCounterpart == null) {
275 return null;
276 } else {
277 return this.conversation.getAccount().getRoster()
278 .getContactFromRoster(this.trueCounterpart);
279 }
280 }
281 }
282
283 public String getBody() {
284 return body;
285 }
286
287 public synchronized void setBody(String body) {
288 if (body == null) {
289 throw new Error("You should not set the message body to null");
290 }
291 this.body = body;
292 this.isGeoUri = null;
293 this.isEmojisOnly = null;
294 this.treatAsDownloadable = null;
295 this.fileParams = null;
296 }
297
298 public String getErrorMessage() {
299 return errorMessage;
300 }
301
302 public boolean setErrorMessage(String message) {
303 boolean changed = (message != null && !message.equals(errorMessage))
304 || (message == null && errorMessage != null);
305 this.errorMessage = message;
306 return changed;
307 }
308
309 public long getTimeSent() {
310 return timeSent;
311 }
312
313 public int getEncryption() {
314 return encryption;
315 }
316
317 public void setEncryption(int encryption) {
318 this.encryption = encryption;
319 }
320
321 public int getStatus() {
322 return status;
323 }
324
325 public void setStatus(int status) {
326 this.status = status;
327 }
328
329 public String getRelativeFilePath() {
330 return this.relativeFilePath;
331 }
332
333 public void setRelativeFilePath(String path) {
334 this.relativeFilePath = path;
335 }
336
337 public String getRemoteMsgId() {
338 return this.remoteMsgId;
339 }
340
341 public void setRemoteMsgId(String id) {
342 this.remoteMsgId = id;
343 }
344
345 public String getServerMsgId() {
346 return this.serverMsgId;
347 }
348
349 public void setServerMsgId(String id) {
350 this.serverMsgId = id;
351 }
352
353 public boolean isRead() {
354 return this.read;
355 }
356
357 public void markRead() {
358 this.read = true;
359 }
360
361 public void markUnread() {
362 this.read = false;
363 }
364
365 public void setTime(long time) {
366 this.timeSent = time;
367 }
368
369 public String getEncryptedBody() {
370 return this.encryptedBody;
371 }
372
373 public void setEncryptedBody(String body) {
374 this.encryptedBody = body;
375 }
376
377 public int getType() {
378 return this.type;
379 }
380
381 public void setType(int type) {
382 this.type = type;
383 }
384
385 public boolean isCarbon() {
386 return carbon;
387 }
388
389 public void setCarbon(boolean carbon) {
390 this.carbon = carbon;
391 }
392
393 public void setEdited(String edited) {
394 this.edited = edited;
395 }
396
397 public boolean edited() {
398 return this.edited != null;
399 }
400
401 public void setTrueCounterpart(Jid trueCounterpart) {
402 this.trueCounterpart = trueCounterpart;
403 }
404
405 public Jid getTrueCounterpart() {
406 return this.trueCounterpart;
407 }
408
409 public Transferable getTransferable() {
410 return this.transferable;
411 }
412
413 public synchronized void setTransferable(Transferable transferable) {
414 this.fileParams = null;
415 this.transferable = transferable;
416 }
417
418 public boolean similar(Message message) {
419 if (type != TYPE_PRIVATE && this.serverMsgId != null && message.getServerMsgId() != null) {
420 return this.serverMsgId.equals(message.getServerMsgId());
421 } else if (this.body == null || this.counterpart == null) {
422 return false;
423 } else {
424 String body, otherBody;
425 if (this.hasFileOnRemoteHost()) {
426 body = getFileParams().url.toString();
427 otherBody = message.body == null ? null : message.body.trim();
428 } else {
429 body = this.body;
430 otherBody = message.body;
431 }
432 final boolean matchingCounterpart = this.counterpart.equals(message.getCounterpart());
433 if (message.getRemoteMsgId() != null) {
434 final boolean hasUuid = CryptoHelper.UUID_PATTERN.matcher(message.getRemoteMsgId()).matches();
435 if (hasUuid && this.edited != null && matchingCounterpart && this.edited.equals(message.getRemoteMsgId())) {
436 return true;
437 }
438 return (message.getRemoteMsgId().equals(this.remoteMsgId) || message.getRemoteMsgId().equals(this.uuid))
439 && matchingCounterpart
440 && (body.equals(otherBody) ||(message.getEncryption() == Message.ENCRYPTION_PGP && hasUuid));
441 } else {
442 return this.remoteMsgId == null
443 && matchingCounterpart
444 && body.equals(otherBody)
445 && Math.abs(this.getTimeSent() - message.getTimeSent()) < Config.MESSAGE_MERGE_WINDOW * 1000;
446 }
447 }
448 }
449
450 public Message next() {
451 synchronized (this.conversation.messages) {
452 if (this.mNextMessage == null) {
453 int index = this.conversation.messages.indexOf(this);
454 if (index < 0 || index >= this.conversation.messages.size() - 1) {
455 this.mNextMessage = null;
456 } else {
457 this.mNextMessage = this.conversation.messages.get(index + 1);
458 }
459 }
460 return this.mNextMessage;
461 }
462 }
463
464 public Message prev() {
465 synchronized (this.conversation.messages) {
466 if (this.mPreviousMessage == null) {
467 int index = this.conversation.messages.indexOf(this);
468 if (index <= 0 || index > this.conversation.messages.size()) {
469 this.mPreviousMessage = null;
470 } else {
471 this.mPreviousMessage = this.conversation.messages.get(index - 1);
472 }
473 }
474 return this.mPreviousMessage;
475 }
476 }
477
478 public boolean isLastCorrectableMessage() {
479 Message next = next();
480 while(next != null) {
481 if (next.isCorrectable()) {
482 return false;
483 }
484 next = next.next();
485 }
486 return isCorrectable();
487 }
488
489 private boolean isCorrectable() {
490 return getStatus() != STATUS_RECEIVED && !isCarbon();
491 }
492
493 public boolean mergeable(final Message message) {
494 return message != null &&
495 (message.getType() == Message.TYPE_TEXT &&
496 this.getTransferable() == null &&
497 message.getTransferable() == null &&
498 message.getEncryption() != Message.ENCRYPTION_PGP &&
499 message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED &&
500 this.getType() == message.getType() &&
501 //this.getStatus() == message.getStatus() &&
502 isStatusMergeable(this.getStatus(), message.getStatus()) &&
503 this.getEncryption() == message.getEncryption() &&
504 this.getCounterpart() != null &&
505 this.getCounterpart().equals(message.getCounterpart()) &&
506 this.edited() == message.edited() &&
507 (message.getTimeSent() - this.getTimeSent()) <= (Config.MESSAGE_MERGE_WINDOW * 1000) &&
508 this.getBody().length() + message.getBody().length() <= Config.MAX_DISPLAY_MESSAGE_CHARS &&
509 !message.isGeoUri()&&
510 !this.isGeoUri() &&
511 !message.treatAsDownloadable() &&
512 !this.treatAsDownloadable() &&
513 !message.getBody().startsWith(ME_COMMAND) &&
514 !this.getBody().startsWith(ME_COMMAND) &&
515 !this.bodyIsOnlyEmojis() &&
516 !message.bodyIsOnlyEmojis() &&
517 ((this.axolotlFingerprint == null && message.axolotlFingerprint == null) || this.axolotlFingerprint.equals(message.getFingerprint())) &&
518 UIHelper.sameDay(message.getTimeSent(),this.getTimeSent())
519 );
520 }
521
522 private static boolean isStatusMergeable(int a, int b) {
523 return a == b || (
524 (a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_UNSEND)
525 || (a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_SEND)
526 || (a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_WAITING)
527 || (a == Message.STATUS_SEND && b == Message.STATUS_UNSEND)
528 || (a == Message.STATUS_SEND && b == Message.STATUS_WAITING)
529 );
530 }
531
532 public static class MergeSeparator {}
533
534 public SpannableStringBuilder getMergedBody() {
535 SpannableStringBuilder body = new SpannableStringBuilder(this.body.trim());
536 Message current = this;
537 while (current.mergeable(current.next())) {
538 current = current.next();
539 if (current == null) {
540 break;
541 }
542 body.append("\n\n");
543 body.setSpan(new MergeSeparator(), body.length() - 2, body.length(),
544 SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
545 body.append(current.getBody().trim());
546 }
547 return body;
548 }
549
550 public boolean hasMeCommand() {
551 return this.body.trim().startsWith(ME_COMMAND);
552 }
553
554 public int getMergedStatus() {
555 int status = this.status;
556 Message current = this;
557 while(current.mergeable(current.next())) {
558 current = current.next();
559 if (current == null) {
560 break;
561 }
562 status = current.status;
563 }
564 return status;
565 }
566
567 public long getMergedTimeSent() {
568 long time = this.timeSent;
569 Message current = this;
570 while(current.mergeable(current.next())) {
571 current = current.next();
572 if (current == null) {
573 break;
574 }
575 time = current.timeSent;
576 }
577 return time;
578 }
579
580 public boolean wasMergedIntoPrevious() {
581 Message prev = this.prev();
582 return prev != null && prev.mergeable(this);
583 }
584
585 public boolean trusted() {
586 Contact contact = this.getContact();
587 return (status > STATUS_RECEIVED || (contact != null && contact.mutualPresenceSubscription()));
588 }
589
590 public boolean fixCounterpart() {
591 Presences presences = conversation.getContact().getPresences();
592 if (counterpart != null && presences.has(counterpart.getResourcepart())) {
593 return true;
594 } else if (presences.size() >= 1) {
595 try {
596 counterpart = Jid.fromParts(conversation.getJid().getLocalpart(),
597 conversation.getJid().getDomainpart(),
598 presences.toResourceArray()[0]);
599 return true;
600 } catch (InvalidJidException e) {
601 counterpart = null;
602 return false;
603 }
604 } else {
605 counterpart = null;
606 return false;
607 }
608 }
609
610 public void setUuid(String uuid) {
611 this.uuid = uuid;
612 }
613
614 public String getEditedId() {
615 return edited;
616 }
617
618 public void setOob(boolean isOob) {
619 this.oob = isOob;
620 }
621
622 private static String extractRelevantExtension(URL url) {
623 String path = url.getPath();
624 return extractRelevantExtension(path);
625 }
626
627 private static String extractRelevantExtension(String path) {
628 if (path == null || path.isEmpty()) {
629 return null;
630 }
631
632 String filename = path.substring(path.lastIndexOf('/') + 1).toLowerCase();
633 int dotPosition = filename.lastIndexOf(".");
634
635 if (dotPosition != -1) {
636 String extension = filename.substring(dotPosition + 1);
637 // we want the real file extension, not the crypto one
638 if (Transferable.VALID_CRYPTO_EXTENSIONS.contains(extension)) {
639 return extractRelevantExtension(filename.substring(0,dotPosition));
640 } else {
641 return extension;
642 }
643 }
644 return null;
645 }
646
647 public String getMimeType() {
648 if (relativeFilePath != null) {
649 int start = relativeFilePath.lastIndexOf('.') + 1;
650 if (start < relativeFilePath.length()) {
651 return MimeUtils.guessMimeTypeFromExtension(relativeFilePath.substring(start));
652 } else {
653 return null;
654 }
655 } else {
656 try {
657 return MimeUtils.guessMimeTypeFromExtension(extractRelevantExtension(new URL(body.trim())));
658 } catch (MalformedURLException e) {
659 return null;
660 }
661 }
662 }
663
664 public synchronized boolean treatAsDownloadable() {
665 if (treatAsDownloadable == null) {
666 if (body.trim().contains(" ")) {
667 treatAsDownloadable = false;
668 }
669 try {
670 final URL url = new URL(body);
671 final String ref = url.getRef();
672 final String protocol = url.getProtocol();
673 final boolean encrypted = ref != null && ref.matches("([A-Fa-f0-9]{2}){48}");
674 treatAsDownloadable = (AesGcmURLStreamHandler.PROTOCOL_NAME.equalsIgnoreCase(protocol) && encrypted)
675 || (("http".equalsIgnoreCase(protocol) || "https".equalsIgnoreCase(protocol)) && (oob || encrypted));
676
677 } catch (MalformedURLException e) {
678 treatAsDownloadable = false;
679 }
680 }
681 return treatAsDownloadable;
682 }
683
684 public synchronized boolean bodyIsOnlyEmojis() {
685 if (isEmojisOnly == null) {
686 isEmojisOnly = EmojiManager.isOnlyEmojis(body.replaceAll("\\s", ""));
687 }
688 return isEmojisOnly;
689 }
690
691 public synchronized boolean isGeoUri() {
692 if (isGeoUri == null) {
693 isGeoUri = GeoHelper.GEO_URI.matcher(body).matches();
694 }
695 return isGeoUri;
696 }
697
698 public synchronized FileParams getFileParams() {
699 if (fileParams == null) {
700 fileParams = new FileParams();
701 if (this.transferable != null) {
702 fileParams.size = this.transferable.getFileSize();
703 }
704 String parts[] = body == null ? new String[0] : body.split("\\|");
705 switch (parts.length) {
706 case 1:
707 try {
708 fileParams.size = Long.parseLong(parts[0]);
709 } catch (NumberFormatException e) {
710 fileParams.url = parseUrl(parts[0]);
711 }
712 break;
713 case 4:
714 fileParams.width = parseInt(parts[2]);
715 fileParams.height = parseInt(parts[3]);
716 case 2:
717 fileParams.url = parseUrl(parts[0]);
718 fileParams.size = parseLong(parts[1]);
719 break;
720 case 3:
721 fileParams.size = parseLong(parts[0]);
722 fileParams.width = parseInt(parts[1]);
723 fileParams.height = parseInt(parts[2]);
724 break;
725 }
726 }
727 return fileParams;
728 }
729
730 private static long parseLong(String value) {
731 try {
732 return Long.parseLong(value);
733 } catch (NumberFormatException e) {
734 return 0;
735 }
736 }
737
738 private static int parseInt(String value) {
739 try {
740 return Integer.parseInt(value);
741 } catch (NumberFormatException e) {
742 return 0;
743 }
744 }
745
746 private static URL parseUrl(String value) {
747 try {
748 return new URL(value);
749 } catch (MalformedURLException e) {
750 return null;
751 }
752 }
753
754 public void untie() {
755 this.mNextMessage = null;
756 this.mPreviousMessage = null;
757 }
758
759 public boolean isFileOrImage() {
760 return type == TYPE_FILE || type == TYPE_IMAGE;
761 }
762
763 public boolean hasFileOnRemoteHost() {
764 return isFileOrImage() && getFileParams().url != null;
765 }
766
767 public boolean needsUploading() {
768 return isFileOrImage() && getFileParams().url == null;
769 }
770
771 public class FileParams {
772 public URL url;
773 public long size = 0;
774 public int width = 0;
775 public int height = 0;
776 }
777
778 public void setFingerprint(String fingerprint) {
779 this.axolotlFingerprint = fingerprint;
780 }
781
782 public String getFingerprint() {
783 return axolotlFingerprint;
784 }
785
786 public boolean isTrusted() {
787 FingerprintStatus s = conversation.getAccount().getAxolotlService().getFingerprintTrust(axolotlFingerprint);
788 return s != null && s.isTrusted();
789 }
790
791 private int getPreviousEncryption() {
792 for (Message iterator = this.prev(); iterator != null; iterator = iterator.prev()){
793 if( iterator.isCarbon() || iterator.getStatus() == STATUS_RECEIVED ) {
794 continue;
795 }
796 return iterator.getEncryption();
797 }
798 return ENCRYPTION_NONE;
799 }
800
801 private int getNextEncryption() {
802 for (Message iterator = this.next(); iterator != null; iterator = iterator.next()){
803 if( iterator.isCarbon() || iterator.getStatus() == STATUS_RECEIVED ) {
804 continue;
805 }
806 return iterator.getEncryption();
807 }
808 return conversation.getNextEncryption();
809 }
810
811 public boolean isValidInSession() {
812 int pastEncryption = getCleanedEncryption(this.getPreviousEncryption());
813 int futureEncryption = getCleanedEncryption(this.getNextEncryption());
814
815 boolean inUnencryptedSession = pastEncryption == ENCRYPTION_NONE
816 || futureEncryption == ENCRYPTION_NONE
817 || pastEncryption != futureEncryption;
818
819 return inUnencryptedSession || getCleanedEncryption(this.getEncryption()) == pastEncryption;
820 }
821
822 private static int getCleanedEncryption(int encryption) {
823 if (encryption == ENCRYPTION_DECRYPTED || encryption == ENCRYPTION_DECRYPTION_FAILED) {
824 return ENCRYPTION_PGP;
825 }
826 return encryption;
827 }
828}