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