1package eu.siacs.conversations.services;
2
3import android.content.res.Resources;
4import android.graphics.Bitmap;
5import android.graphics.BitmapFactory;
6import android.graphics.Canvas;
7import android.graphics.Paint;
8import android.graphics.PorterDuff;
9import android.graphics.PorterDuffXfermode;
10import android.graphics.Rect;
11import android.graphics.Typeface;
12import android.net.Uri;
13import android.support.annotation.Nullable;
14import android.text.TextUtils;
15import android.util.DisplayMetrics;
16import android.util.Log;
17import android.util.LruCache;
18
19import java.util.ArrayList;
20import java.util.HashMap;
21import java.util.HashSet;
22import java.util.List;
23import java.util.Locale;
24import java.util.Set;
25
26import eu.siacs.conversations.Config;
27import eu.siacs.conversations.R;
28import eu.siacs.conversations.entities.Account;
29import eu.siacs.conversations.entities.Bookmark;
30import eu.siacs.conversations.entities.Contact;
31import eu.siacs.conversations.entities.Conversation;
32import eu.siacs.conversations.entities.Conversational;
33import eu.siacs.conversations.entities.ListItem;
34import eu.siacs.conversations.entities.Message;
35import eu.siacs.conversations.entities.MucOptions;
36import eu.siacs.conversations.utils.UIHelper;
37import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
38import eu.siacs.conversations.xmpp.XmppConnection;
39import rocks.xmpp.addr.Jid;
40
41public class AvatarService implements OnAdvancedStreamFeaturesLoaded {
42
43 private static final int FG_COLOR = 0xFFFAFAFA;
44 private static final int TRANSPARENT = 0x00000000;
45 private static final int PLACEHOLDER_COLOR = 0xFF202020;
46
47 private static final String PREFIX_CONTACT = "contact";
48 private static final String PREFIX_CONVERSATION = "conversation";
49 private static final String PREFIX_ACCOUNT = "account";
50 private static final String PREFIX_GENERIC = "generic";
51
52 final private ArrayList<Integer> sizes = new ArrayList<>();
53 final private HashMap<String, Set<String>> conversationDependentKeys = new HashMap<>();
54
55 protected XmppConnectionService mXmppConnectionService = null;
56
57 AvatarService(XmppConnectionService service) {
58 this.mXmppConnectionService = service;
59 }
60
61 private Bitmap get(final Contact contact, final int size, boolean cachedOnly) {
62 if (contact.isSelf()) {
63 return get(contact.getAccount(), size, cachedOnly);
64 }
65 final String KEY = key(contact, size);
66 Bitmap avatar = this.mXmppConnectionService.getBitmapCache().get(KEY);
67 if (avatar != null || cachedOnly) {
68 return avatar;
69 }
70 if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
71 avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
72 }
73 if (avatar == null && contact.getProfilePhoto() != null) {
74 avatar = mXmppConnectionService.getFileBackend().cropCenterSquare(Uri.parse(contact.getProfilePhoto()), size);
75 }
76 if (avatar == null && contact.getAvatarFilename() != null) {
77 avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatarFilename(), size);
78 }
79 if (avatar == null) {
80 avatar = get(contact.getDisplayName(), contact.getJid().asBareJid().toString(), size, false);
81 }
82 this.mXmppConnectionService.getBitmapCache().put(KEY, avatar);
83 return avatar;
84 }
85
86 public Bitmap getRoundedShortcut(final Contact contact) {
87 return getRoundedShortcut(contact, false);
88 }
89
90 public Bitmap getRoundedShortcutWithIcon(final Contact contact) {
91 return getRoundedShortcut(contact, true);
92 }
93
94 private Bitmap getRoundedShortcut(final Contact contact, boolean withIcon) {
95 DisplayMetrics metrics = mXmppConnectionService.getResources().getDisplayMetrics();
96 int size = Math.round(metrics.density * 48);
97 Bitmap bitmap = get(contact, size);
98 Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
99 Canvas canvas = new Canvas(output);
100 final Paint paint = new Paint();
101
102 drawAvatar(bitmap, canvas, paint);
103 if (withIcon) {
104 drawIcon(canvas, paint);
105 }
106 return output;
107 }
108
109 private void drawAvatar(Bitmap bitmap, Canvas canvas, Paint paint) {
110 final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
111 paint.setAntiAlias(true);
112 canvas.drawARGB(0, 0, 0, 0);
113 canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);
114 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
115 canvas.drawBitmap(bitmap, rect, rect, paint);
116 }
117
118 private void drawIcon(Canvas canvas, Paint paint) {
119 BitmapFactory.Options opts = new BitmapFactory.Options();
120 opts.inSampleSize = 2;
121 Resources resources = mXmppConnectionService.getResources();
122 Bitmap icon = BitmapFactory.decodeResource(resources, R.mipmap.new_launcher_round, opts);
123 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));
124
125 int iconSize = Math.round(canvas.getHeight() / 2.6f);
126
127 int left = canvas.getWidth() - iconSize;
128 int top = canvas.getHeight() - iconSize;
129 final Rect rect = new Rect(left, top, left + iconSize, top + iconSize);
130 canvas.drawBitmap(icon, null, rect, paint);
131 }
132
133 public Bitmap get(final MucOptions.User user, final int size, boolean cachedOnly) {
134 Contact c = user.getContact();
135 if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null || user.getAvatar() == null)) {
136 return get(c, size, cachedOnly);
137 } else {
138 return getImpl(user, size, cachedOnly);
139 }
140 }
141
142 private Bitmap getImpl(final MucOptions.User user, final int size, boolean cachedOnly) {
143 final String KEY = key(user, size);
144 Bitmap avatar = this.mXmppConnectionService.getBitmapCache().get(KEY);
145 if (avatar != null || cachedOnly) {
146 return avatar;
147 }
148 if (user.getAvatar() != null) {
149 avatar = mXmppConnectionService.getFileBackend().getAvatar(user.getAvatar(), size);
150 }
151 if (avatar == null) {
152 Contact contact = user.getContact();
153 if (contact != null) {
154 avatar = get(contact, size, false);
155 } else {
156 String seed = user.getRealJid() != null ? user.getRealJid().asBareJid().toString() : null;
157 avatar = get(user.getName(), seed, size, false);
158 }
159 }
160 this.mXmppConnectionService.getBitmapCache().put(KEY, avatar);
161 return avatar;
162 }
163
164 public void clear(Contact contact) {
165 synchronized (this.sizes) {
166 for (Integer size : sizes) {
167 this.mXmppConnectionService.getBitmapCache().remove(
168 key(contact, size));
169 }
170 }
171 for (Conversation conversation : mXmppConnectionService.findAllConferencesWith(contact)) {
172 MucOptions.User user = conversation.getMucOptions().findUserByRealJid(contact.getJid().asBareJid());
173 if (user != null) {
174 clear(user);
175 }
176 clear(conversation);
177 }
178 }
179
180 private String key(Contact contact, int size) {
181 synchronized (this.sizes) {
182 if (!this.sizes.contains(size)) {
183 this.sizes.add(size);
184 }
185 }
186 return PREFIX_CONTACT +
187 '\0' +
188 contact.getAccount().getJid().asBareJid() +
189 '\0' +
190 emptyOnNull(contact.getJid()) +
191 '\0' +
192 size;
193 }
194
195 private String key(MucOptions.User user, int size) {
196 synchronized (this.sizes) {
197 if (!this.sizes.contains(size)) {
198 this.sizes.add(size);
199 }
200 }
201 return PREFIX_CONTACT +
202 '\0' +
203 user.getAccount().getJid().asBareJid() +
204 '\0' +
205 emptyOnNull(user.getFullJid()) +
206 '\0' +
207 emptyOnNull(user.getRealJid()) +
208 '\0' +
209 size;
210 }
211
212 public Bitmap get(ListItem item, int size) {
213 return get(item, size, false);
214 }
215
216 public Bitmap get(ListItem item, int size, boolean cachedOnly) {
217 if (item instanceof Contact) {
218 return get((Contact) item, size, cachedOnly);
219 } else if (item instanceof Bookmark) {
220 Bookmark bookmark = (Bookmark) item;
221 if (bookmark.getConversation() != null) {
222 return get(bookmark.getConversation(), size, cachedOnly);
223 } else {
224 Jid jid = bookmark.getJid();
225 Account account = bookmark.getAccount();
226 Contact contact = jid == null ? null : account.getRoster().getContact(jid);
227 if (contact != null && contact.getAvatarFilename() != null) {
228 return get(contact, size, cachedOnly);
229 }
230 String seed = jid != null ? jid.asBareJid().toString() : null;
231 return get(bookmark.getDisplayName(), seed, size, cachedOnly);
232 }
233 } else {
234 String seed = item.getJid() != null ? item.getJid().asBareJid().toString() : null;
235 return get(item.getDisplayName(), seed, size, cachedOnly);
236 }
237 }
238
239 public Bitmap get(Conversation conversation, int size) {
240 return get(conversation, size, false);
241 }
242
243 public Bitmap get(Conversation conversation, int size, boolean cachedOnly) {
244 if (conversation.getMode() == Conversation.MODE_SINGLE) {
245 return get(conversation.getContact(), size, cachedOnly);
246 } else {
247 return get(conversation.getMucOptions(), size, cachedOnly);
248 }
249 }
250
251 public void clear(Conversation conversation) {
252 if (conversation.getMode() == Conversation.MODE_SINGLE) {
253 clear(conversation.getContact());
254 } else {
255 clear(conversation.getMucOptions());
256 synchronized (this.conversationDependentKeys) {
257 Set<String> keys = this.conversationDependentKeys.get(conversation.getUuid());
258 if (keys == null) {
259 return;
260 }
261 LruCache<String, Bitmap> cache = this.mXmppConnectionService.getBitmapCache();
262 for (String key : keys) {
263 cache.remove(key);
264 }
265 keys.clear();
266 }
267 }
268 }
269
270 private Bitmap get(MucOptions mucOptions, int size, boolean cachedOnly) {
271 final String KEY = key(mucOptions, size);
272 Bitmap bitmap = this.mXmppConnectionService.getBitmapCache().get(KEY);
273 if (bitmap != null || cachedOnly) {
274 return bitmap;
275 }
276
277 bitmap = mXmppConnectionService.getFileBackend().getAvatar(mucOptions.getAvatar(), size);
278
279 if (bitmap == null) {
280 final List<MucOptions.User> users = mucOptions.getUsersRelevantForNameAndAvatar();
281 if (users.size() == 0) {
282 Conversation c = mucOptions.getConversation();
283 bitmap = getImpl(c.getName().toString(), c.getJid().asBareJid().toString(), size);
284 } else {
285 bitmap = getImpl(users, size);
286 }
287 }
288
289 this.mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
290
291 return bitmap;
292 }
293
294 private Bitmap get(List<MucOptions.User> users, int size, boolean cachedOnly) {
295 final String KEY = key(users, size);
296 Bitmap bitmap = this.mXmppConnectionService.getBitmapCache().get(KEY);
297 if (bitmap != null || cachedOnly) {
298 return bitmap;
299 }
300 bitmap = getImpl(users, size);
301 this.mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
302 return bitmap;
303 }
304
305 private Bitmap getImpl(List<MucOptions.User> users, int size) {
306 int count = users.size();
307 Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
308 Canvas canvas = new Canvas(bitmap);
309 bitmap.eraseColor(TRANSPARENT);
310 if (count == 0) {
311 throw new AssertionError("Unable to draw tiles for 0 users");
312 } else if (count == 1) {
313 drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
314 drawTile(canvas, users.get(0).getAccount(), size / 2 + 1, 0, size, size);
315 } else if (count == 2) {
316 drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
317 drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size);
318 } else if (count == 3) {
319 drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
320 drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size / 2 - 1);
321 drawTile(canvas, users.get(2), size / 2 + 1, size / 2 + 1, size,
322 size);
323 } else if (count == 4) {
324 drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
325 drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
326 drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
327 drawTile(canvas, users.get(3), size / 2 + 1, size / 2 + 1, size,
328 size);
329 } else {
330 drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
331 drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
332 drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
333 drawTile(canvas, "\u2026", PLACEHOLDER_COLOR, size / 2 + 1, size / 2 + 1,
334 size, size);
335 }
336 return bitmap;
337 }
338
339 public void clear(final MucOptions options) {
340 if (options == null) {
341 return;
342 }
343 synchronized (this.sizes) {
344 for (Integer size : sizes) {
345 this.mXmppConnectionService.getBitmapCache().remove(key(options, size));
346 }
347 }
348 }
349
350 private String key(final MucOptions options, int size) {
351 synchronized (this.sizes) {
352 if (!this.sizes.contains(size)) {
353 this.sizes.add(size);
354 }
355 }
356 return PREFIX_CONVERSATION + "_" + options.getConversation().getUuid()
357 + "_" + String.valueOf(size);
358 }
359
360 private String key(List<MucOptions.User> users, int size) {
361 final Conversation conversation = users.get(0).getConversation();
362 StringBuilder builder = new StringBuilder("TILE_");
363 builder.append(conversation.getUuid());
364
365 for (MucOptions.User user : users) {
366 builder.append("\0");
367 builder.append(emptyOnNull(user.getRealJid()));
368 builder.append("\0");
369 builder.append(emptyOnNull(user.getFullJid()));
370 }
371 builder.append('\0');
372 builder.append(size);
373 final String key = builder.toString();
374 synchronized (this.conversationDependentKeys) {
375 Set<String> keys;
376 if (this.conversationDependentKeys.containsKey(conversation.getUuid())) {
377 keys = this.conversationDependentKeys.get(conversation.getUuid());
378 } else {
379 keys = new HashSet<>();
380 this.conversationDependentKeys.put(conversation.getUuid(), keys);
381 }
382 keys.add(key);
383 }
384 return key;
385 }
386
387 public Bitmap get(Account account, int size) {
388 return get(account, size, false);
389 }
390
391 public Bitmap get(Account account, int size, boolean cachedOnly) {
392 final String KEY = key(account, size);
393 Bitmap avatar = mXmppConnectionService.getBitmapCache().get(KEY);
394 if (avatar != null || cachedOnly) {
395 return avatar;
396 }
397 avatar = mXmppConnectionService.getFileBackend().getAvatar(account.getAvatar(), size);
398 if (avatar == null) {
399 final String displayName = account.getDisplayName();
400 final String jid = account.getJid().asBareJid().toEscapedString();
401 if (QuickConversationsService.isQuicksy() && !TextUtils.isEmpty(displayName)) {
402 avatar = get(displayName, jid, size, false);
403 } else {
404 avatar = get(jid, null, size, false);
405 }
406 }
407 mXmppConnectionService.getBitmapCache().put(KEY, avatar);
408 return avatar;
409 }
410
411 public Bitmap get(Message message, int size, boolean cachedOnly) {
412 final Conversational conversation = message.getConversation();
413 if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
414 return get(message.getCounterparts(), size, cachedOnly);
415 } else if (message.getStatus() == Message.STATUS_RECEIVED) {
416 Contact c = message.getContact();
417 if (c != null && (c.getProfilePhoto() != null || c.getAvatarFilename() != null)) {
418 return get(c, size, cachedOnly);
419 } else if (conversation instanceof Conversation && message.getConversation().getMode() == Conversation.MODE_MULTI) {
420 final Jid trueCounterpart = message.getTrueCounterpart();
421 final MucOptions mucOptions = ((Conversation) conversation).getMucOptions();
422 MucOptions.User user;
423 if (trueCounterpart != null) {
424 user = mucOptions.findOrCreateUserByRealJid(trueCounterpart, message.getCounterpart());
425 } else {
426 user = mucOptions.findUserByFullJid(message.getCounterpart());
427 }
428 if (user != null) {
429 return getImpl(user, size, cachedOnly);
430 }
431 } else if (c != null) {
432 return get(c, size, cachedOnly);
433 }
434 Jid tcp = message.getTrueCounterpart();
435 String seed = tcp != null ? tcp.asBareJid().toString() : null;
436 return get(UIHelper.getMessageDisplayName(message), seed, size, cachedOnly);
437 } else {
438 return get(conversation.getAccount(), size, cachedOnly);
439 }
440 }
441
442 public void clear(Account account) {
443 synchronized (this.sizes) {
444 for (Integer size : sizes) {
445 this.mXmppConnectionService.getBitmapCache().remove(key(account, size));
446 }
447 }
448 }
449
450 public void clear(MucOptions.User user) {
451 synchronized (this.sizes) {
452 for (Integer size : sizes) {
453 this.mXmppConnectionService.getBitmapCache().remove(key(user, size));
454 }
455 }
456 }
457
458 private String key(Account account, int size) {
459 synchronized (this.sizes) {
460 if (!this.sizes.contains(size)) {
461 this.sizes.add(size);
462 }
463 }
464 return PREFIX_ACCOUNT + "_" + account.getUuid() + "_"
465 + String.valueOf(size);
466 }
467
468 /*public Bitmap get(String name, int size) {
469 return get(name,null, size,false);
470 }*/
471
472 public Bitmap get(final String name, String seed, final int size, boolean cachedOnly) {
473 final String KEY = key(seed == null ? name : name+"\0"+seed, size);
474 Bitmap bitmap = mXmppConnectionService.getBitmapCache().get(KEY);
475 if (bitmap != null || cachedOnly) {
476 return bitmap;
477 }
478 bitmap = getImpl(name, seed, size);
479 mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
480 return bitmap;
481 }
482
483 private Bitmap getImpl(final String name, final String seed, final int size) {
484 Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
485 Canvas canvas = new Canvas(bitmap);
486 final String trimmedName = name == null ? "" : name.trim();
487 drawTile(canvas, trimmedName, seed, 0, 0, size, size);
488 return bitmap;
489 }
490
491 private String key(String name, int size) {
492 synchronized (this.sizes) {
493 if (!this.sizes.contains(size)) {
494 this.sizes.add(size);
495 }
496 }
497 return PREFIX_GENERIC + "_" + name + "_" + String.valueOf(size);
498 }
499
500 private boolean drawTile(Canvas canvas, String letter, int tileColor, int left, int top, int right, int bottom) {
501 letter = letter.toUpperCase(Locale.getDefault());
502 Paint tilePaint = new Paint(), textPaint = new Paint();
503 tilePaint.setColor(tileColor);
504 textPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
505 textPaint.setColor(FG_COLOR);
506 textPaint.setTypeface(Typeface.create("sans-serif-light",
507 Typeface.NORMAL));
508 textPaint.setTextSize((float) ((right - left) * 0.8));
509 Rect rect = new Rect();
510
511 canvas.drawRect(new Rect(left, top, right, bottom), tilePaint);
512 textPaint.getTextBounds(letter, 0, 1, rect);
513 float width = textPaint.measureText(letter);
514 canvas.drawText(letter, (right + left) / 2 - width / 2, (top + bottom)
515 / 2 + rect.height() / 2, textPaint);
516 return true;
517 }
518
519 private boolean drawTile(Canvas canvas, MucOptions.User user, int left, int top, int right, int bottom) {
520 Contact contact = user.getContact();
521 if (contact != null) {
522 Uri uri = null;
523 if (contact.getAvatarFilename() != null && QuickConversationsService.isQuicksy()) {
524 uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
525 } else if (contact.getProfilePhoto() != null) {
526 uri = Uri.parse(contact.getProfilePhoto());
527 } else if (contact.getAvatarFilename() != null) {
528 uri = mXmppConnectionService.getFileBackend().getAvatarUri(contact.getAvatarFilename());
529 }
530 if (drawTile(canvas, uri, left, top, right, bottom)) {
531 return true;
532 }
533 } else if (user.getAvatar() != null) {
534 Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(user.getAvatar());
535 if (drawTile(canvas, uri, left, top, right, bottom)) {
536 return true;
537 }
538 }
539 if (contact != null) {
540 String seed = contact.getJid().asBareJid().toString();
541 drawTile(canvas, contact.getDisplayName(), seed, left, top, right, bottom);
542 } else {
543 String seed = user.getRealJid() == null ? null : user.getRealJid().asBareJid().toString();
544 drawTile(canvas, user.getName(), seed, left, top, right, bottom);
545 }
546 return true;
547 }
548
549 private boolean drawTile(Canvas canvas, Account account, int left, int top, int right, int bottom) {
550 String avatar = account.getAvatar();
551 if (avatar != null) {
552 Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(avatar);
553 if (uri != null) {
554 if (drawTile(canvas, uri, left, top, right, bottom)) {
555 return true;
556 }
557 }
558 }
559 String name = account.getJid().asBareJid().toString();
560 return drawTile(canvas, name, name, left, top, right, bottom);
561 }
562
563 private boolean drawTile(Canvas canvas, String name, String seed, int left, int top, int right, int bottom) {
564 if (name != null) {
565 final String letter = getFirstLetter(name);
566 final int color = UIHelper.getColorForName(seed == null ? name : seed);
567 drawTile(canvas, letter, color, left, top, right, bottom);
568 return true;
569 }
570 return false;
571 }
572
573 private static String getFirstLetter(String name) {
574 for (Character c : name.toCharArray()) {
575 if (Character.isLetterOrDigit(c)) {
576 return c.toString();
577 }
578 }
579 return "X";
580 }
581
582 private boolean drawTile(Canvas canvas, Uri uri, int left, int top, int right, int bottom) {
583 if (uri != null) {
584 Bitmap bitmap = mXmppConnectionService.getFileBackend()
585 .cropCenter(uri, bottom - top, right - left);
586 if (bitmap != null) {
587 drawTile(canvas, bitmap, left, top, right, bottom);
588 return true;
589 }
590 }
591 return false;
592 }
593
594 private boolean drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop, int dstright, int dstbottom) {
595 Rect dst = new Rect(dstleft, dsttop, dstright, dstbottom);
596 canvas.drawBitmap(bm, null, dst, null);
597 return true;
598 }
599
600 @Override
601 public void onAdvancedStreamFeaturesAvailable(Account account) {
602 XmppConnection.Features features = account.getXmppConnection().getFeatures();
603 if (features.pep() && !features.pepPersistent()) {
604 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": has pep but is not persistent");
605 if (account.getAvatar() != null) {
606 mXmppConnectionService.republishAvatarIfNeeded(account);
607 }
608 }
609 }
610
611 private static String emptyOnNull(@Nullable Jid value) {
612 return value == null ? "" : value.toString();
613 }
614}