1package eu.siacs.conversations.services;
2
3import android.util.Log;
4import android.util.Pair;
5
6import java.math.BigInteger;
7import java.util.ArrayList;
8import java.util.HashSet;
9import java.util.Iterator;
10import java.util.List;
11
12import eu.siacs.conversations.Config;
13import eu.siacs.conversations.R;
14import eu.siacs.conversations.entities.Account;
15import eu.siacs.conversations.entities.Conversation;
16import eu.siacs.conversations.generator.AbstractGenerator;
17import eu.siacs.conversations.xml.Element;
18import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
19import eu.siacs.conversations.xmpp.OnIqPacketReceived;
20import eu.siacs.conversations.xmpp.jid.Jid;
21import eu.siacs.conversations.xmpp.stanzas.IqPacket;
22
23public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
24
25 private final XmppConnectionService mXmppConnectionService;
26
27 private final HashSet<Query> queries = new HashSet<Query>();
28 private final ArrayList<Query> pendingQueries = new ArrayList<Query>();
29
30 public enum PagingOrder {
31 NORMAL,
32 REVERSE
33 };
34
35 public MessageArchiveService(final XmppConnectionService service) {
36 this.mXmppConnectionService = service;
37 }
38
39 private void catchup(final Account account) {
40 synchronized (this.queries) {
41 for(Iterator<Query> iterator = this.queries.iterator(); iterator.hasNext();) {
42 Query query = iterator.next();
43 if (query.getAccount() == account) {
44 iterator.remove();
45 }
46 }
47 }
48 long startCatchup = getLastMessageTransmitted(account);
49 long endCatchup = account.getXmppConnection().getLastSessionEstablished();
50 if (startCatchup == 0) {
51 return;
52 } else if (endCatchup - startCatchup >= Config.MAM_MAX_CATCHUP) {
53 startCatchup = endCatchup - Config.MAM_MAX_CATCHUP;
54 List<Conversation> conversations = mXmppConnectionService.getConversations();
55 for (Conversation conversation : conversations) {
56 if (conversation.getMode() == Conversation.MODE_SINGLE && conversation.getAccount() == account && startCatchup > conversation.getLastMessageTransmitted()) {
57 this.query(conversation,startCatchup);
58 }
59 }
60 }
61 final Query query = new Query(account, startCatchup, endCatchup);
62 this.queries.add(query);
63 this.execute(query);
64 }
65
66 public void catchupMUC(final Conversation conversation) {
67 if (conversation.getLastMessageTransmitted() < 0 && conversation.countMessages() == 0) {
68 query(conversation,
69 0,
70 System.currentTimeMillis());
71 } else {
72 query(conversation,
73 conversation.getLastMessageTransmitted(),
74 System.currentTimeMillis());
75 }
76 }
77
78 private long getLastMessageTransmitted(final Account account) {
79 Pair<Long,String> pair = mXmppConnectionService.databaseBackend.getLastMessageReceived(account);
80 return pair == null ? 0 : pair.first;
81 }
82
83 public Query query(final Conversation conversation) {
84 if (conversation.getLastMessageTransmitted() < 0 && conversation.countMessages() == 0) {
85 return query(conversation,
86 0,
87 System.currentTimeMillis());
88 } else {
89 return query(conversation,
90 conversation.getLastMessageTransmitted(),
91 conversation.getAccount().getXmppConnection().getLastSessionEstablished());
92 }
93 }
94
95 public Query query(final Conversation conversation, long end) {
96 return this.query(conversation,conversation.getLastMessageTransmitted(),end);
97 }
98
99 public Query query(Conversation conversation, long start, long end) {
100 synchronized (this.queries) {
101 if (start > end) {
102 return null;
103 }
104 final Query query = new Query(conversation, start, end,PagingOrder.REVERSE);
105 this.queries.add(query);
106 this.execute(query);
107 return query;
108 }
109 }
110
111 public void executePendingQueries(final Account account) {
112 List<Query> pending = new ArrayList<>();
113 synchronized(this.pendingQueries) {
114 for(Iterator<Query> iterator = this.pendingQueries.iterator(); iterator.hasNext();) {
115 Query query = iterator.next();
116 if (query.getAccount() == account) {
117 pending.add(query);
118 iterator.remove();
119 }
120 }
121 }
122 for(Query query : pending) {
123 this.execute(query);
124 }
125 }
126
127 private void execute(final Query query) {
128 final Account account= query.getAccount();
129 if (account.getStatus() == Account.State.ONLINE) {
130 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": running mam query " + query.toString());
131 IqPacket packet = this.mXmppConnectionService.getIqGenerator().queryMessageArchiveManagement(query);
132 this.mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
133 @Override
134 public void onIqPacketReceived(Account account, IqPacket packet) {
135 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
136 synchronized (MessageArchiveService.this.queries) {
137 MessageArchiveService.this.queries.remove(query);
138 if (query.hasCallback()) {
139 query.callback();
140 }
141 }
142 } else if (packet.getType() != IqPacket.TYPE.RESULT) {
143 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": error executing mam: " + packet.toString());
144 finalizeQuery(query);
145 }
146 }
147 });
148 } else {
149 synchronized (this.pendingQueries) {
150 this.pendingQueries.add(query);
151 }
152 }
153 }
154
155 private void finalizeQuery(Query query) {
156 synchronized (this.queries) {
157 this.queries.remove(query);
158 }
159 final Conversation conversation = query.getConversation();
160 if (conversation != null) {
161 conversation.sort();
162 conversation.setHasMessagesLeftOnServer(query.getMessageCount() > 0);
163 } else {
164 for(Conversation tmp : this.mXmppConnectionService.getConversations()) {
165 if (tmp.getAccount() == query.getAccount()) {
166 tmp.sort();
167 }
168 }
169 }
170 if (query.hasCallback()) {
171 query.callback();
172 } else {
173 this.mXmppConnectionService.updateConversationUi();
174 }
175 }
176
177 public boolean queryInProgress(Conversation conversation, XmppConnectionService.OnMoreMessagesLoaded callback) {
178 synchronized (this.queries) {
179 for(Query query : queries) {
180 if (query.conversation == conversation) {
181 if (!query.hasCallback() && callback != null) {
182 query.setCallback(callback);
183 }
184 return true;
185 }
186 }
187 return false;
188 }
189 }
190
191 public void processFin(Element fin, Jid from) {
192 if (fin == null) {
193 return;
194 }
195 Query query = findQuery(fin.getAttribute("queryid"));
196 if (query == null || !query.validFrom(from)) {
197 return;
198 }
199 boolean complete = fin.getAttributeAsBoolean("complete");
200 Element set = fin.findChild("set","http://jabber.org/protocol/rsm");
201 Element last = set == null ? null : set.findChild("last");
202 Element first = set == null ? null : set.findChild("first");
203 Element relevant = query.getPagingOrder() == PagingOrder.NORMAL ? last : first;
204 boolean abort = (query.getStart() == 0 && query.getTotalCount() >= Config.PAGE_SIZE) || query.getTotalCount() >= Config.MAM_MAX_MESSAGES;
205 if (complete || relevant == null || abort) {
206 this.finalizeQuery(query);
207 Log.d(Config.LOGTAG,query.getAccount().getJid().toBareJid().toString()+": finished mam after "+query.getTotalCount()+" messages");
208 if (query.getWith() == null && query.getMessageCount() > 0) {
209 mXmppConnectionService.getNotificationService().finishBacklog(true);
210 }
211 } else {
212 final Query nextQuery;
213 if (query.getPagingOrder() == PagingOrder.NORMAL) {
214 nextQuery = query.next(last == null ? null : last.getContent());
215 } else {
216 nextQuery = query.prev(first == null ? null : first.getContent());
217 }
218 this.execute(nextQuery);
219 this.finalizeQuery(query);
220 synchronized (this.queries) {
221 this.queries.remove(query);
222 this.queries.add(nextQuery);
223 }
224 }
225 }
226
227 public Query findQuery(String id) {
228 if (id == null) {
229 return null;
230 }
231 synchronized (this.queries) {
232 for(Query query : this.queries) {
233 if (query.getQueryId().equals(id)) {
234 return query;
235 }
236 }
237 return null;
238 }
239 }
240
241 @Override
242 public void onAdvancedStreamFeaturesAvailable(Account account) {
243 if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().mam()) {
244 this.catchup(account);
245 }
246 }
247
248 public class Query {
249 private int totalCount = 0;
250 private int messageCount = 0;
251 private long start;
252 private long end;
253 private String queryId;
254 private String reference = null;
255 private Account account;
256 private Conversation conversation;
257 private PagingOrder pagingOrder = PagingOrder.NORMAL;
258 private XmppConnectionService.OnMoreMessagesLoaded callback = null;
259
260
261 public Query(Conversation conversation, long start, long end) {
262 this(conversation.getAccount(), start, end);
263 this.conversation = conversation;
264 }
265
266 public Query(Conversation conversation, long start, long end, PagingOrder order) {
267 this(conversation,start,end);
268 this.pagingOrder = order;
269 }
270
271 public Query(Account account, long start, long end) {
272 this.account = account;
273 this.start = start;
274 this.end = end;
275 this.queryId = new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
276 }
277
278 private Query page(String reference) {
279 Query query = new Query(this.account,this.start,this.end);
280 query.reference = reference;
281 query.conversation = conversation;
282 query.totalCount = totalCount;
283 query.callback = callback;
284 return query;
285 }
286
287 public Query next(String reference) {
288 Query query = page(reference);
289 query.pagingOrder = PagingOrder.NORMAL;
290 return query;
291 }
292
293 public Query prev(String reference) {
294 Query query = page(reference);
295 query.pagingOrder = PagingOrder.REVERSE;
296 return query;
297 }
298
299 public String getReference() {
300 return reference;
301 }
302
303 public PagingOrder getPagingOrder() {
304 return this.pagingOrder;
305 }
306
307 public String getQueryId() {
308 return queryId;
309 }
310
311 public Jid getWith() {
312 return conversation == null ? null : conversation.getJid().toBareJid();
313 }
314
315 public boolean muc() {
316 return conversation != null && conversation.getMode() == Conversation.MODE_MULTI;
317 }
318
319 public long getStart() {
320 return start;
321 }
322
323 public void setCallback(XmppConnectionService.OnMoreMessagesLoaded callback) {
324 this.callback = callback;
325 }
326
327 public void callback() {
328 if (this.callback != null) {
329 this.callback.onMoreMessagesLoaded(messageCount,conversation);
330 if (messageCount == 0) {
331 this.callback.informUser(R.string.no_more_history_on_server);
332 }
333 }
334 }
335
336 public long getEnd() {
337 return end;
338 }
339
340 public Conversation getConversation() {
341 return conversation;
342 }
343
344 public Account getAccount() {
345 return this.account;
346 }
347
348 public void incrementMessageCount() {
349 this.messageCount++;
350 this.totalCount++;
351 }
352
353 public int getTotalCount() {
354 return this.totalCount;
355 }
356
357 public int getMessageCount() {
358 return this.messageCount;
359 }
360
361 public boolean validFrom(Jid from) {
362 if (muc()) {
363 return getWith().equals(from);
364 } else {
365 return (from == null) || account.getJid().toBareJid().equals(from.toBareJid());
366 }
367 }
368
369 @Override
370 public String toString() {
371 StringBuilder builder = new StringBuilder();
372 if (this.muc()) {
373 builder.append("to="+this.getWith().toString());
374 } else {
375 builder.append("with=");
376 if (this.getWith() == null) {
377 builder.append("*");
378 } else {
379 builder.append(getWith().toString());
380 }
381 }
382 builder.append(", start=");
383 builder.append(AbstractGenerator.getTimestamp(this.start));
384 builder.append(", end=");
385 builder.append(AbstractGenerator.getTimestamp(this.end));
386 if (this.reference!=null) {
387 if (this.pagingOrder == PagingOrder.NORMAL) {
388 builder.append(", after=");
389 } else {
390 builder.append(", before=");
391 }
392 builder.append(this.reference);
393 }
394 return builder.toString();
395 }
396
397 public boolean hasCallback() {
398 return this.callback != null;
399 }
400 }
401}