prosody-modules
a1c2677257da
mod_archive/mod_archive.lua

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mod_archive/mod_archive.lua @ 196:a1c2677257da

mod_archive: XEP-0059 Result Set Management for Retrieving a List of Collections is DONE
author shinysky<shinysky1986(AT)gmail.com>
date Wed, 07 Jul 2010 17:31:31 +0800
parent 195:4d9ed6374a1f
child 198:a3b5810de3e4
comparison
equal deleted inserted replaced
195:4d9ed6374a1f 196:a1c2677257da
335 335
336 local function filter_end(endtime, coll_start) 336 local function filter_end(endtime, coll_start)
337 return not endtime or endtime >= coll_start; 337 return not endtime or endtime >= coll_start;
338 end 338 end
339 339
340 local function find_coll(resset, uid)
341 for i, c in ipairs(resset) do
342 if gen_uid(c) == uid then
343 return i;
344 end
345 end
346 return nil;
347 end
348
340 local function list_handler(event) 349 local function list_handler(event)
341 local origin, stanza = event.origin, event.stanza; 350 local origin, stanza = event.origin, event.stanza;
342 local node, host = origin.username, origin.host; 351 local node, host = origin.username, origin.host;
343 local data = dm.list_load(node, host, ARCHIVE_DIR); 352 local data = dm.list_load(node, host, ARCHIVE_DIR);
344 local elem = stanza.tags[1]; 353 local elem = stanza.tags[1];
353 table.insert(resset, collection); 362 table.insert(resset, collection);
354 end 363 end
355 end 364 end
356 end 365 end
357 local reply = st.reply(stanza):tag('list', {xmlns='urn:xmpp:archive'}); 366 local reply = st.reply(stanza):tag('list', {xmlns='urn:xmpp:archive'});
358 if table.getn(resset) > 0 then 367 local count = table.getn(resset);
368 if count > 0 then
359 local max = elem.tags[1]:child_with_name("max"); 369 local max = elem.tags[1]:child_with_name("max");
360 if max then 370 if max then
361 max = tonumber(max:get_text()); 371 max = tonumber(max:get_text());
362 else max = 100; end 372 else max = 100; end
363 local after = elem.tags[1]:child_with_name("after"); 373 local after = elem.tags[1]:child_with_name("after");
364 -- local before = elem.tags[1]:child_with_name("before"); 374 local before = elem.tags[1]:child_with_name("before");
365 -- local index = elem.tags[1]:child_with_name("index"); 375 local index = elem.tags[1]:child_with_name("index");
366 if after then after = after:get_text(); end 376 local s, e = 1, 1+max;
367 local found = false; 377 if after then
368 local first, last = nil, nil; 378 after = after:get_text();
379 s = find_coll(resset, after);
380 if not s then -- not found
381 origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
382 return true;
383 end
384 s = s + 1;
385 e = s + max;
386 elseif before then
387 before = before:get_text();
388 if not before or before == '' then -- the last page
389 e = count + 1;
390 s = e - max;
391 else
392 e = find_coll(resset, before);
393 if not e then -- not found
394 origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
395 return true;
396 end
397 s = e - max;
398 end
399 elseif index then
400 s = tonumber(index:get_text()) + 1; -- 0-based
401 e = s + max;
402 end
403 if s < 1 then s = 1; end
404 if e > count + 1 then e = count + 1; end
369 -- Assuming result set is sorted. 405 -- Assuming result set is sorted.
370 for i, c in ipairs(resset) do 406 for i = s, e-1 do
371 if after and not found then 407 reply:add_child(st.stanza('chat', resset[i].attr));
372 if gen_uid(c) == after then
373 found = true;
374 end
375 elseif max > 0 then
376 if not first then first = i; end
377 last = i;
378 local chat = st.stanza('chat', c.attr);
379 reply:add_child(chat);
380 max = max - 1;
381 else break; end
382 end 408 end
383 local set = st.stanza('set', {xmlns='http://jabber.org/protocol/rsm'}); 409 local set = st.stanza('set', {xmlns='http://jabber.org/protocol/rsm'});
384 if first then 410 if s <= e-1 then
385 set:tag('first', {index=first-1}):text(gen_uid(resset[first])):up() 411 set:tag('first', {index=s-1}):text(gen_uid(resset[s])):up()
386 :tag('last'):text(gen_uid(resset[last])):up(); 412 :tag('last'):text(gen_uid(resset[e-1])):up();
387 end 413 end
388 set:tag('count'):text(tostring(table.getn(resset))):up(); 414 set:tag('count'):text(tostring(count)):up();
389 reply:add_child(set); 415 reply:add_child(set);
390 end 416 end
391 origin.send(reply); 417 origin.send(reply);
392 return true; 418 return true;
393 end 419 end