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source: protocols/twitter/twitter_lib.c @ fb351ce

Last change on this file since fb351ce was fb351ce, checked in by Wilmer van der Gaast <wilmer@…>, at 2012-11-09T00:07:23Z
Getting better. Corruption fixed, fetching of mentions fixed, error handling "fixed".
Property mode set to `100644`
File size: 28.6 KB

Line
1	/***************************************************************************\
2	* *
3	* BitlBee - An IRC to IM gateway *
4	* Simple module to facilitate twitter functionality. *
5	* *
6	* Copyright 2009-2010 Geert Mulders <g.c.w.m.mulders@gmail.com> *
7	* Copyright 2010-2012 Wilmer van der Gaast <wilmer@gaast.net> *
8	* *
9	* This library is free software; you can redistribute it and/or *
10	* modify it under the terms of the GNU Lesser General Public *
11	* License as published by the Free Software Foundation, version *
12	* 2.1. *
13	* *
14	* This library is distributed in the hope that it will be useful, *
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
17	* Lesser General Public License for more details. *
18	* *
19	* You should have received a copy of the GNU Lesser General Public License *
20	* along with this library; if not, write to the Free Software Foundation, *
21	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *
22	* *
23	****************************************************************************/
24
25	/* For strptime(): */
26	#if(__sun)
27	#else
28	#define _XOPEN_SOURCE
29	#endif
30
31	#include "twitter_http.h"
32	#include "twitter.h"
33	#include "bitlbee.h"
34	#include "url.h"
35	#include "misc.h"
36	#include "base64.h"
37	#include "xmltree.h"
38	#include "twitter_lib.h"
39	#include "json_util.h"
40	#include <ctype.h>
41	#include <errno.h>
42
43	/* GLib < 2.12.0 doesn't have g_ascii_strtoll(), work around using system strtoll(). */
44	/* GLib < 2.12.4 can be buggy: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=488013 */
45	#if !GLIB_CHECK_VERSION(2,12,5)
46	#include <stdlib.h>
47	#include <limits.h>
48	#define g_ascii_strtoll strtoll
49	#endif
50
51	#define TXL_STATUS 1
52	#define TXL_USER 2
53	#define TXL_ID 3
54
55	struct twitter_xml_list {
56	int type;
57	gint64 next_cursor;
58	GSList *list;
59	};
60
61	struct twitter_xml_user {
62	char *name;
63	char *screen_name;
64	};
65
66	struct twitter_xml_status {
67	time_t created_at;
68	char *text;
69	struct twitter_xml_user *user;
70	guint64 id, reply_to;
71	};
72
73	static void twitter_groupchat_init(struct im_connection *ic);
74
75	/**
76	* Frees a twitter_xml_user struct.
77	*/
78	static void txu_free(struct twitter_xml_user *txu)
79	{
80	if (txu == NULL)
81	return;
82
83	g_free(txu->name);
84	g_free(txu->screen_name);
85	g_free(txu);
86	}
87
88	/**
89	* Frees a twitter_xml_status struct.
90	*/
91	static void txs_free(struct twitter_xml_status *txs)
92	{
93	if (txs == NULL)
94	return;
95
96	g_free(txs->text);
97	txu_free(txs->user);
98	g_free(txs);
99	}
100
101	/**
102	* Free a twitter_xml_list struct.
103	* type is the type of list the struct holds.
104	*/
105	static void txl_free(struct twitter_xml_list *txl)
106	{
107	GSList *l;
108	if (txl == NULL)
109	return;
110
111	for (l = txl->list; l; l = g_slist_next(l)) {
112	if (txl->type == TXL_STATUS) {
113	txs_free((struct twitter_xml_status *) l->data);
114	} else if (txl->type == TXL_ID) {
115	g_free(l->data);
116	} else if (txl->type == TXL_USER) {
117	txu_free(l->data);
118	}
119	}
120
121	g_slist_free(txl->list);
122	g_free(txl);
123	}
124
125	/**
126	* Compare status elements
127	*/
128	static gint twitter_compare_elements(gconstpointer a, gconstpointer b)
129	{
130	struct twitter_xml_status a_status = (struct twitter_xml_status ) a;
131	struct twitter_xml_status b_status = (struct twitter_xml_status ) b;
132
133	if (a_status->created_at < b_status->created_at) {
134	return -1;
135	} else if (a_status->created_at > b_status->created_at) {
136	return 1;
137	} else {
138	return 0;
139	}
140	}
141
142	/**
143	* Add a buddy if it is not already added, set the status to logged in.
144	*/
145	static void twitter_add_buddy(struct im_connection ic, char name, const char *fullname)
146	{
147	struct twitter_data *td = ic->proto_data;
148
149	// Check if the buddy is already in the buddy list.
150	if (!bee_user_by_handle(ic->bee, ic, name)) {
151	char *mode = set_getstr(&ic->acc->set, "mode");
152
153	// The buddy is not in the list, add the buddy and set the status to logged in.
154	imcb_add_buddy(ic, name, NULL);
155	imcb_rename_buddy(ic, name, fullname);
156	if (g_strcasecmp(mode, "chat") == 0) {
157	/* Necessary so that nicks always get translated to the
158	exact Twitter username. */
159	imcb_buddy_nick_hint(ic, name, name);
160	imcb_chat_add_buddy(td->timeline_gc, name);
161	} else if (g_strcasecmp(mode, "many") == 0)
162	imcb_buddy_status(ic, name, OPT_LOGGED_IN, NULL, NULL);
163	}
164	}
165
166	/* Warning: May return a malloc()ed value, which will be free()d on the next
167	call. Only for short-term use. NOT THREADSAFE! */
168	char twitter_parse_error(struct http_request req)
169	{
170	static char *ret = NULL;
171	struct xt_node root, node, *err;
172
173	g_free(ret);
174	ret = NULL;
175
176	/* EX:
177	{"errors":[{"message":"Rate limit exceeded","code":88}]} */
178	if (req->body_size > 0) {
179	root = xt_from_string(req->reply_body, req->body_size);
180
181	for (node = root; node; node = node->next)
182	if ((err = xt_find_node(node->children, "error")) && err->text_len > 0) {
183	ret = g_strdup_printf("%s (%s)", req->status_string, err->text);
184	break;
185	}
186
187	xt_free_node(root);
188	}
189
190	return ret ? ret : req->status_string;
191	}
192
193	/* WATCH OUT: This function might or might not destroy your connection.
194	Sub-optimal indeed, but just be careful when this returns NULL! */
195	static json_value twitter_parse_response(struct im_connection ic, struct http_request *req)
196	{
197	gboolean logging_in = !(ic->flags & OPT_LOGGED_IN);
198	gboolean periodic;
199	struct twitter_data *td = ic->proto_data;
200	json_value *ret;
201	char path[64] = "", *s;
202
203	if ((s = strchr(req->request, ' '))) {
204	path[sizeof(path)-1] = '\0';
205	strncpy(path, s + 1, sizeof(path) - 1);
206	if ((s = strchr(path, '?')) \|\| (s = strchr(path, ' ')))
207	*s = '\0';
208	}
209
210	/* Kinda nasty. :-( Trying to suppress error messages, but only
211	for periodic (i.e. mentions/timeline) queries. */
212	periodic = strstr(path, "timeline") \|\| strstr(path, "mentions");
213
214	if (req->status_code == 401 && logging_in) {
215	/* IIRC Twitter once had an outage where they were randomly
216	throwing 401s so I'll keep treating this one as fatal
217	only during login. */
218	imcb_error(ic, "Authentication failure");
219	imc_logout(ic, FALSE);
220	return NULL;
221	} else if (req->status_code != 200) {
222	// It didn't go well, output the error and return.
223	if (!periodic \|\| logging_in \|\| ++td->http_fails >= 5)
224	imcb_error(ic, "Could not retrieve %s: %s",
225	path, twitter_parse_error(req));
226
227	if (logging_in)
228	imc_logout(ic, TRUE);
229	return NULL;
230	} else {
231	td->http_fails = 0;
232	}
233
234	if ((ret = json_parse(req->reply_body)) == NULL) {
235	imcb_error(ic, "Could not retrieve %s: %s",
236	path, "XML parse error");
237	}
238	return ret;
239	}
240
241	static void twitter_http_get_friends_ids(struct http_request *req);
242
243	/**
244	* Get the friends ids.
245	*/
246	void twitter_get_friends_ids(struct im_connection *ic, gint64 next_cursor)
247	{
248	// Primitive, but hey! It works...
249	char *args[2];
250	args[0] = "cursor";
251	args[1] = g_strdup_printf("%lld", (long long) next_cursor);
252	twitter_http(ic, TWITTER_FRIENDS_IDS_URL, twitter_http_get_friends_ids, ic, 0, args, 2);
253
254	g_free(args[1]);
255	}
256
257	/**
258	* Fill a list of ids.
259	*/
260	static xt_status twitter_xt_get_friends_id_list(json_value node, struct twitter_xml_list txl)
261	{
262	json_value *c;
263	int i;
264
265	// Set the list type.
266	txl->type = TXL_ID;
267
268	c = json_o_get(node, "ids");
269	if (!c \|\| c->type != json_array)
270	return XT_ABORT;
271
272	for (i = 0; i < c->u.array.length; i ++) {
273	if (c->u.array.values[i]->type != json_integer)
274	continue;
275
276	txl->list = g_slist_prepend(txl->list,
277	g_strdup_printf("%lld", c->u.array.values[i]->u.integer));
278
279	}
280
281	c = json_o_get(node, "next_cursor");
282	if (c && c->type == json_integer)
283	txl->next_cursor = c->u.integer;
284	else
285	txl->next_cursor = -1;
286
287	return XT_HANDLED;
288	}
289
290	static void twitter_get_users_lookup(struct im_connection *ic);
291
292	/**
293	* Callback for getting the friends ids.
294	*/
295	static void twitter_http_get_friends_ids(struct http_request *req)
296	{
297	struct im_connection *ic;
298	json_value *parsed;
299	struct twitter_xml_list *txl;
300	struct twitter_data *td;
301
302	ic = req->data;
303
304	// Check if the connection is still active.
305	if (!g_slist_find(twitter_connections, ic))
306	return;
307
308	td = ic->proto_data;
309
310	/* Create the room now that we "logged in". */
311	if (!td->timeline_gc && g_strcasecmp(set_getstr(&ic->acc->set, "mode"), "chat") == 0)
312	twitter_groupchat_init(ic);
313
314	txl = g_new0(struct twitter_xml_list, 1);
315	txl->list = td->follow_ids;
316
317	// Parse the data.
318	if (!(parsed = twitter_parse_response(ic, req)))
319	return;
320
321	twitter_xt_get_friends_id_list(parsed, txl);
322	json_value_free(parsed);
323
324	td->follow_ids = txl->list;
325	if (txl->next_cursor)
326	/* These were just numbers. Up to 4000 in a response AFAIK so if we get here
327	we may be using a spammer account. \o/ */
328	twitter_get_friends_ids(ic, txl->next_cursor);
329	else
330	/* Now to convert all those numbers into names.. */
331	twitter_get_users_lookup(ic);
332
333	txl->list = NULL;
334	txl_free(txl);
335	}
336
337	static xt_status twitter_xt_get_users(json_value node, struct twitter_xml_list txl);
338	static void twitter_http_get_users_lookup(struct http_request *req);
339
340	static void twitter_get_users_lookup(struct im_connection *ic)
341	{
342	struct twitter_data *td = ic->proto_data;
343	char *args[2] = {
344	"user_id",
345	NULL,
346	};
347	GString *ids = g_string_new("");
348	int i;
349
350	/* We can request up to 100 users at a time. */
351	for (i = 0; i < 100 && td->follow_ids; i ++) {
352	g_string_append_printf(ids, ",%s", (char*) td->follow_ids->data);
353	g_free(td->follow_ids->data);
354	td->follow_ids = g_slist_remove(td->follow_ids, td->follow_ids->data);
355	}
356	if (ids->len > 0) {
357	args[1] = ids->str + 1;
358	/* POST, because I think ids can be up to 1KB long. */
359	twitter_http(ic, TWITTER_USERS_LOOKUP_URL, twitter_http_get_users_lookup, ic, 1, args, 2);
360	} else {
361	/* We have all users. Continue with login. (Get statuses.) */
362	td->flags \|= TWITTER_HAVE_FRIENDS;
363	twitter_login_finish(ic);
364	}
365	g_string_free(ids, TRUE);
366	}
367
368	/**
369	* Callback for getting (twitter)friends...
370	*
371	* Be afraid, be very afraid! This function will potentially add hundreds of "friends". "Who has
372	* hundreds of friends?" you wonder? You probably not, since you are reading the source of
373	* BitlBee... Get a life and meet new people!
374	*/
375	static void twitter_http_get_users_lookup(struct http_request *req)
376	{
377	struct im_connection *ic = req->data;
378	json_value *parsed;
379	struct twitter_xml_list *txl;
380	GSList *l = NULL;
381	struct twitter_xml_user *user;
382
383	// Check if the connection is still active.
384	if (!g_slist_find(twitter_connections, ic))
385	return;
386
387	txl = g_new0(struct twitter_xml_list, 1);
388	txl->list = NULL;
389
390	// Get the user list from the parsed xml feed.
391	if (!(parsed = twitter_parse_response(ic, req)))
392	return;
393	twitter_xt_get_users(parsed, txl);
394	json_value_free(parsed);
395
396	// Add the users as buddies.
397	for (l = txl->list; l; l = g_slist_next(l)) {
398	user = l->data;
399	twitter_add_buddy(ic, user->screen_name, user->name);
400	}
401
402	// Free the structure.
403	txl_free(txl);
404
405	twitter_get_users_lookup(ic);
406	}
407
408	struct twitter_xml_user twitter_xt_get_user(const json_value node)
409	{
410	struct twitter_xml_user *txu;
411
412	txu = g_new0(struct twitter_xml_user, 1);
413	txu->name = g_strdup(json_o_str(node, "name"));
414	txu->screen_name = g_strdup(json_o_str(node, "screen_name"));
415
416	return txu;
417	}
418
419	/**
420	* Function to fill a twitter_xml_list struct.
421	* It sets:
422	* - all <user>s from the <users> element.
423	*/
424	static xt_status twitter_xt_get_users(json_value node, struct twitter_xml_list txl)
425	{
426	struct twitter_xml_user *txu;
427	int i;
428
429	// Set the type of the list.
430	txl->type = TXL_USER;
431
432	if (!node \|\| node->type != json_array)
433	return XT_ABORT;
434
435	// The root <users> node should hold the list of users <user>
436	// Walk over the nodes children.
437	for (i = 0; i < node->u.array.length; i ++) {
438	txu = twitter_xt_get_user(node->u.array.values[i]);
439	if (txu)
440	txl->list = g_slist_prepend(txl->list, txu);
441	}
442
443	return XT_HANDLED;
444	}
445
446	#ifdef __GLIBC__
447	#define TWITTER_TIME_FORMAT "%a %b %d %H:%M:%S %z %Y"
448	#else
449	#define TWITTER_TIME_FORMAT "%a %b %d %H:%M:%S +0000 %Y"
450	#endif
451
452	/**
453	* Function to fill a twitter_xml_status struct.
454	* It sets:
455	* - the status text and
456	* - the created_at timestamp and
457	* - the status id and
458	* - the user in a twitter_xml_user struct.
459	*/
460	static xt_status twitter_xt_get_status(const json_value node, struct twitter_xml_status txs)
461	{
462	const json_value rt = NULL, entities = NULL;
463	int i;
464
465	if (node->type != json_object)
466	return XT_ABORT;
467
468	for (i = 0; i < node->u.object.length; i ++) {
469	const char *k = node->u.object.values[i].name;
470	const json_value *v = node->u.object.values[i].value;
471
472	if (strcmp("text", k) == 0 && v->type == json_string) {
473	txs->text = g_memdup(v->u.string.ptr, v->u.string.length + 1);
474	} else if (strcmp("retweeted_status", k) == 0 && v->type == json_object) {
475	rt = v;
476	} else if (strcmp("created_at", k) == 0 && v->type == json_string) {
477	struct tm parsed;
478
479	/* Very sensitive to changes to the formatting of
480	this field. :-( Also assumes the timezone used
481	is UTC since C time handling functions suck. */
482	if (strptime(v->u.string.ptr, TWITTER_TIME_FORMAT, &parsed) != NULL)
483	txs->created_at = mktime_utc(&parsed);
484	} else if (strcmp("user", k) == 0 && v->type == json_object) {
485	txs->user = twitter_xt_get_user(v);
486	} else if (strcmp("id", k) == 0 && v->type == json_integer) {
487	txs->id = v->u.integer;
488	} else if (strcmp("in_reply_to_status_id", k) == 0 && v->type == json_integer) {
489	txs->reply_to = v->u.integer;
490	} else if (strcmp("entities", k) == 0 && v->type == json_object) {
491	entities = v;
492	}
493	}
494
495	/* If it's a (truncated) retweet, get the original. Even if the API claims it
496	wasn't truncated because it may be lying. */
497	if (rt) {
498	struct twitter_xml_status *rtxs = g_new0(struct twitter_xml_status, 1);
499	if (twitter_xt_get_status(rt, rtxs) != XT_HANDLED) {
500	txs_free(rtxs);
501	return XT_HANDLED;
502	}
503
504	g_free(txs->text);
505	txs->text = g_strdup_printf("RT @%s: %s", rtxs->user->screen_name, rtxs->text);
506	txs_free(rtxs);
507	} else if (entities) {
508	JSON_O_FOREACH (entities, k, v) {
509	int i;
510
511	if (v->type != json_array)
512	continue;
513	if (strcmp(k, "urls") != 0 && strcmp(k, "media") != 0)
514	continue;
515
516	for (i = 0; i < v->u.array.length; i ++) {
517	if (v->u.array.values[i]->type != json_object)
518	continue;
519
520	const char *kort = json_o_str(v->u.array.values[i], "url");
521	const char *disp = json_o_str(v->u.array.values[i], "display_url");
522	char pos, new;
523
524	if (!kort \|\| !disp \|\| !(pos = strstr(txs->text, kort)))
525	continue;
526
527	*pos = '\0';
528	new = g_strdup_printf("%s%s <%s>%s", txs->text, kort,
529	disp, pos + strlen(kort));
530
531	g_free(txs->text);
532	txs->text = new;
533	}
534	}
535	}
536
537	return XT_HANDLED;
538	}
539
540	/**
541	* Function to fill a twitter_xml_list struct.
542	* It sets:
543	* - all <status>es within the <status> element and
544	* - the next_cursor.
545	*/
546	static xt_status twitter_xt_get_status_list(struct im_connection ic, const json_value node,
547	struct twitter_xml_list *txl)
548	{
549	struct twitter_xml_status *txs;
550	bee_user_t *bu;
551	int i;
552
553	// Set the type of the list.
554	txl->type = TXL_STATUS;
555
556	if (node->type != json_array)
557	return XT_ABORT;
558
559	// The root <statuses> node should hold the list of statuses <status>
560	// Walk over the nodes children.
561	for (i = 0; i < node->u.array.length; i ++) {
562	txs = g_new0(struct twitter_xml_status, 1);
563	twitter_xt_get_status(node->u.array.values[i], txs);
564	// Put the item in the front of the list.
565	txl->list = g_slist_prepend(txl->list, txs);
566
567	if (txs->user && txs->user->screen_name &&
568	(bu = bee_user_by_handle(ic->bee, ic, txs->user->screen_name))) {
569	struct twitter_user_data *tud = bu->data;
570
571	if (txs->id > tud->last_id) {
572	tud->last_id = txs->id;
573	tud->last_time = txs->created_at;
574	}
575	}
576	}
577
578	return XT_HANDLED;
579	}
580
581	static char twitter_msg_add_id(struct im_connection ic,
582	struct twitter_xml_status txs, const char prefix)
583	{
584	struct twitter_data *td = ic->proto_data;
585	char *ret = NULL;
586
587	if (!set_getbool(&ic->acc->set, "show_ids")) {
588	if (*prefix)
589	return g_strconcat(prefix, txs->text, NULL);
590	else
591	return NULL;
592	}
593
594	td->log[td->log_id].id = txs->id;
595	td->log[td->log_id].bu = bee_user_by_handle(ic->bee, ic, txs->user->screen_name);
596	if (txs->reply_to) {
597	int i;
598	for (i = 0; i < TWITTER_LOG_LENGTH; i++)
599	if (td->log[i].id == txs->reply_to) {
600	ret = g_strdup_printf("\002[\002%02d->%02d\002]\002 %s%s",
601	td->log_id, i, prefix, txs->text);
602	break;
603	}
604	}
605	if (ret == NULL)
606	ret = g_strdup_printf("\002[\002%02d\002]\002 %s%s", td->log_id, prefix, txs->text);
607	td->log_id = (td->log_id + 1) % TWITTER_LOG_LENGTH;
608
609	return ret;
610	}
611
612	static void twitter_groupchat_init(struct im_connection *ic)
613	{
614	char *name_hint;
615	struct groupchat *gc;
616	struct twitter_data *td = ic->proto_data;
617	GSList *l;
618
619	td->timeline_gc = gc = imcb_chat_new(ic, "twitter/timeline");
620
621	name_hint = g_strdup_printf("%s_%s", td->prefix, ic->acc->user);
622	imcb_chat_name_hint(gc, name_hint);
623	g_free(name_hint);
624
625	for (l = ic->bee->users; l; l = l->next) {
626	bee_user_t *bu = l->data;
627	if (bu->ic == ic)
628	imcb_chat_add_buddy(td->timeline_gc, bu->handle);
629	}
630	}
631
632	/**
633	* Function that is called to see the statuses in a groupchat window.
634	*/
635	static void twitter_groupchat(struct im_connection ic, GSList list)
636	{
637	struct twitter_data *td = ic->proto_data;
638	GSList *l = NULL;
639	struct twitter_xml_status *status;
640	struct groupchat *gc;
641	guint64 last_id = 0;
642
643	// Create a new groupchat if it does not exsist.
644	if (!td->timeline_gc)
645	twitter_groupchat_init(ic);
646
647	gc = td->timeline_gc;
648	if (!gc->joined)
649	imcb_chat_add_buddy(gc, ic->acc->user);
650
651	for (l = list; l; l = g_slist_next(l)) {
652	char *msg;
653
654	status = l->data;
655	if (status->user == NULL \|\| status->text == NULL \|\| last_id == status->id)
656	continue;
657
658	last_id = status->id;
659
660	strip_html(status->text);
661
662	if (set_getbool(&ic->acc->set, "strip_newlines"))
663	strip_newlines(status->text);
664
665	msg = twitter_msg_add_id(ic, status, "");
666
667	// Say it!
668	if (g_strcasecmp(td->user, status->user->screen_name) == 0) {
669	imcb_chat_log(gc, "You: %s", msg ? msg : status->text);
670	} else {
671	twitter_add_buddy(ic, status->user->screen_name, status->user->name);
672
673	imcb_chat_msg(gc, status->user->screen_name,
674	msg ? msg : status->text, 0, status->created_at);
675	}
676
677	g_free(msg);
678
679	// Update the timeline_id to hold the highest id, so that by the next request
680	// we won't pick up the updates already in the list.
681	td->timeline_id = MAX(td->timeline_id, status->id);
682	}
683	}
684
685	/**
686	* Function that is called to see statuses as private messages.
687	*/
688	static void twitter_private_message_chat(struct im_connection ic, GSList list)
689	{
690	struct twitter_data *td = ic->proto_data;
691	GSList *l = NULL;
692	struct twitter_xml_status *status;
693	char from[MAX_STRING];
694	gboolean mode_one;
695	guint64 last_id = 0;
696
697	mode_one = g_strcasecmp(set_getstr(&ic->acc->set, "mode"), "one") == 0;
698
699	if (mode_one) {
700	g_snprintf(from, sizeof(from) - 1, "%s_%s", td->prefix, ic->acc->user);
701	from[MAX_STRING - 1] = '\0';
702	}
703
704	for (l = list; l; l = g_slist_next(l)) {
705	char prefix = NULL, text = NULL;
706
707	status = l->data;
708	if (status->user == NULL \|\| status->text == NULL \|\| last_id == status->id)
709	continue;
710
711	last_id = status->id;
712
713	strip_html(status->text);
714	if (mode_one)
715	prefix = g_strdup_printf("\002<\002%s\002>\002 ",
716	status->user->screen_name);
717	else
718	twitter_add_buddy(ic, status->user->screen_name, status->user->name);
719
720	text = twitter_msg_add_id(ic, status, prefix ? prefix : "");
721
722	imcb_buddy_msg(ic,
723	mode_one ? from : status->user->screen_name,
724	text ? text : status->text, 0, status->created_at);
725
726	// Update the timeline_id to hold the highest id, so that by the next request
727	// we won't pick up the updates already in the list.
728	td->timeline_id = MAX(td->timeline_id, status->id);
729
730	g_free(text);
731	g_free(prefix);
732	}
733	}
734
735	static void twitter_http_get_home_timeline(struct http_request *req);
736	static void twitter_http_get_mentions(struct http_request *req);
737
738	/**
739	* Get the timeline with optionally mentions
740	*/
741	void twitter_get_timeline(struct im_connection *ic, gint64 next_cursor)
742	{
743	struct twitter_data *td = ic->proto_data;
744	gboolean include_mentions = set_getbool(&ic->acc->set, "fetch_mentions");
745
746	if (td->flags & TWITTER_DOING_TIMELINE) {
747	if (++td->http_fails >= 5) {
748	imcb_error(ic, "Fetch timeout (%d)", td->flags);
749	imc_logout(ic, TRUE);
750	}
751	}
752
753	td->flags \|= TWITTER_DOING_TIMELINE;
754
755	twitter_get_home_timeline(ic, next_cursor);
756
757	if (include_mentions) {
758	twitter_get_mentions(ic, next_cursor);
759	}
760	}
761
762	/**
763	* Call this one after receiving timeline/mentions. Show to user once we have
764	* both.
765	*/
766	void twitter_flush_timeline(struct im_connection *ic)
767	{
768	struct twitter_data *td = ic->proto_data;
769	gboolean include_mentions = set_getbool(&ic->acc->set, "fetch_mentions");
770	int show_old_mentions = set_getint(&ic->acc->set, "show_old_mentions");
771	struct twitter_xml_list *home_timeline = td->home_timeline_obj;
772	struct twitter_xml_list *mentions = td->mentions_obj;
773	GSList *output = NULL;
774	GSList *l;
775
776	if (!(td->flags & TWITTER_GOT_TIMELINE)) {
777	return;
778	}
779
780	if (include_mentions && !(td->flags & TWITTER_GOT_MENTIONS)) {
781	return;
782	}
783
784	if (home_timeline && home_timeline->list) {
785	for (l = home_timeline->list; l; l = g_slist_next(l)) {
786	output = g_slist_insert_sorted(output, l->data, twitter_compare_elements);
787	}
788	}
789
790	if (include_mentions && mentions && mentions->list) {
791	for (l = mentions->list; l; l = g_slist_next(l)) {
792	if (show_old_mentions < 1 && output && twitter_compare_elements(l->data, output->data) < 0) {
793	continue;
794	}
795
796	output = g_slist_insert_sorted(output, l->data, twitter_compare_elements);
797	}
798	}
799
800	if (!(ic->flags & OPT_LOGGED_IN))
801	imcb_connected(ic);
802
803	// See if the user wants to see the messages in a groupchat window or as private messages.
804	if (g_strcasecmp(set_getstr(&ic->acc->set, "mode"), "chat") == 0)
805	twitter_groupchat(ic, output);
806	else
807	twitter_private_message_chat(ic, output);
808
809	g_slist_free(output);
810
811	txl_free(home_timeline);
812	txl_free(mentions);
813
814	td->flags &= ~(TWITTER_DOING_TIMELINE \| TWITTER_GOT_TIMELINE \| TWITTER_GOT_MENTIONS);
815	td->home_timeline_obj = td->mentions_obj = NULL;
816	}
817
818	/**
819	* Get the timeline.
820	*/
821	void twitter_get_home_timeline(struct im_connection *ic, gint64 next_cursor)
822	{
823	struct twitter_data *td = ic->proto_data;
824
825	txl_free(td->home_timeline_obj);
826	td->home_timeline_obj = NULL;
827	td->flags &= ~TWITTER_GOT_TIMELINE;
828
829	char *args[6];
830	args[0] = "cursor";
831	args[1] = g_strdup_printf("%lld", (long long) next_cursor);
832	args[2] = "include_entities";
833	args[3] = "true";
834	if (td->timeline_id) {
835	args[4] = "since_id";
836	args[5] = g_strdup_printf("%llu", (long long unsigned int) td->timeline_id);
837	}
838
839	if (twitter_http(ic, TWITTER_HOME_TIMELINE_URL, twitter_http_get_home_timeline, ic, 0, args,
840	td->timeline_id ? 6 : 4) == NULL) {
841	if (++td->http_fails >= 5)
842	imcb_error(ic, "Could not retrieve %s: %s",
843	TWITTER_HOME_TIMELINE_URL, "connection failed");
844	td->flags \|= TWITTER_GOT_TIMELINE;
845	twitter_flush_timeline(ic);
846	}
847
848	g_free(args[1]);
849	if (td->timeline_id) {
850	g_free(args[5]);
851	}
852	}
853
854	/**
855	* Get mentions.
856	*/
857	void twitter_get_mentions(struct im_connection *ic, gint64 next_cursor)
858	{
859	struct twitter_data *td = ic->proto_data;
860
861	txl_free(td->mentions_obj);
862	td->mentions_obj = NULL;
863	td->flags &= ~TWITTER_GOT_MENTIONS;
864
865	char *args[6];
866	args[0] = "cursor";
867	args[1] = g_strdup_printf("%lld", (long long) next_cursor);
868	args[2] = "include_entities";
869	args[3] = "true";
870	if (td->timeline_id) {
871	args[4] = "since_id";
872	args[5] = g_strdup_printf("%llu", (long long unsigned int) td->timeline_id);
873	} else {
874	args[4] = "count";
875	args[5] = g_strdup_printf("%d", set_getint(&ic->acc->set, "show_old_mentions"));
876	}
877
878	if (twitter_http(ic, TWITTER_MENTIONS_URL, twitter_http_get_mentions,
879	ic, 0, args, 6) == NULL) {
880	if (++td->http_fails >= 5)
881	imcb_error(ic, "Could not retrieve %s: %s",
882	TWITTER_MENTIONS_URL, "connection failed");
883	td->flags \|= TWITTER_GOT_MENTIONS;
884	twitter_flush_timeline(ic);
885	}
886
887	g_free(args[1]);
888	if (td->timeline_id) {
889	g_free(args[5]);
890	}
891	}
892
893	/**
894	* Callback for getting the home timeline.
895	*/
896	static void twitter_http_get_home_timeline(struct http_request *req)
897	{
898	struct im_connection *ic = req->data;
899	struct twitter_data *td;
900	json_value *parsed;
901	struct twitter_xml_list *txl;
902
903	// Check if the connection is still active.
904	if (!g_slist_find(twitter_connections, ic))
905	return;
906
907	td = ic->proto_data;
908
909	txl = g_new0(struct twitter_xml_list, 1);
910	txl->list = NULL;
911
912	// The root <statuses> node should hold the list of statuses <status>
913	if (!(parsed = twitter_parse_response(ic, req)))
914	goto end;
915	twitter_xt_get_status_list(ic, parsed, txl);
916	// json_value_free(parsed);
917
918	td->home_timeline_obj = txl;
919
920	end:
921	if (!g_slist_find(twitter_connections, ic))
922	return;
923
924	td->flags \|= TWITTER_GOT_TIMELINE;
925
926	twitter_flush_timeline(ic);
927	}
928
929	/**
930	* Callback for getting mentions.
931	*/
932	static void twitter_http_get_mentions(struct http_request *req)
933	{
934	struct im_connection *ic = req->data;
935	struct twitter_data *td;
936	json_value *parsed;
937	struct twitter_xml_list *txl;
938
939	// Check if the connection is still active.
940	if (!g_slist_find(twitter_connections, ic))
941	return;
942
943	td = ic->proto_data;
944
945	txl = g_new0(struct twitter_xml_list, 1);
946	txl->list = NULL;
947
948	// The root <statuses> node should hold the list of statuses <status>
949	if (!(parsed = twitter_parse_response(ic, req)))
950	goto end;
951	twitter_xt_get_status_list(ic, parsed, txl);
952	// json_value_free(parsed);
953
954	td->mentions_obj = txl;
955
956	end:
957	if (!g_slist_find(twitter_connections, ic))
958	return;
959
960	td->flags \|= TWITTER_GOT_MENTIONS;
961
962	twitter_flush_timeline(ic);
963	}
964
965	/**
966	* Callback to use after sending a POST request to twitter.
967	* (Generic, used for a few kinds of queries.)
968	*/
969	static void twitter_http_post(struct http_request *req)
970	{
971	struct im_connection *ic = req->data;
972	struct twitter_data *td;
973	struct xt_node parsed, node;
974
975	// Check if the connection is still active.
976	if (!g_slist_find(twitter_connections, ic))
977	return;
978
979	td = ic->proto_data;
980	td->last_status_id = 0;
981
982	if (!(parsed = twitter_parse_response(ic, req)))
983	return;
984
985	if ((node = xt_find_node(parsed, "status")) &&
986	(node = xt_find_node(node->children, "id")) && node->text)
987	td->last_status_id = g_ascii_strtoull(node->text, NULL, 10);
988	}
989
990	/**
991	* Function to POST a new status to twitter.
992	*/
993	void twitter_post_status(struct im_connection ic, char msg, guint64 in_reply_to)
994	{
995	char *args[4] = {
996	"status", msg,
997	"in_reply_to_status_id",
998	g_strdup_printf("%llu", (unsigned long long) in_reply_to)
999	};
1000	twitter_http(ic, TWITTER_STATUS_UPDATE_URL, twitter_http_post, ic, 1,
1001	args, in_reply_to ? 4 : 2);
1002	g_free(args[3]);
1003	}
1004
1005
1006	/**
1007	* Function to POST a new message to twitter.
1008	*/
1009	void twitter_direct_messages_new(struct im_connection ic, char who, char *msg)
1010	{
1011	char *args[4];
1012	args[0] = "screen_name";
1013	args[1] = who;
1014	args[2] = "text";
1015	args[3] = msg;
1016	// Use the same callback as for twitter_post_status, since it does basically the same.
1017	twitter_http(ic, TWITTER_DIRECT_MESSAGES_NEW_URL, twitter_http_post, ic, 1, args, 4);
1018	}
1019
1020	void twitter_friendships_create_destroy(struct im_connection ic, char who, int create)
1021	{
1022	char *args[2];
1023	args[0] = "screen_name";
1024	args[1] = who;
1025	twitter_http(ic, create ? TWITTER_FRIENDSHIPS_CREATE_URL : TWITTER_FRIENDSHIPS_DESTROY_URL,
1026	twitter_http_post, ic, 1, args, 2);
1027	}
1028
1029	void twitter_status_destroy(struct im_connection *ic, guint64 id)
1030	{
1031	char *url;
1032	url = g_strdup_printf("%s%llu%s", TWITTER_STATUS_DESTROY_URL,
1033	(unsigned long long) id, ".json");
1034	twitter_http(ic, url, twitter_http_post, ic, 1, NULL, 0);
1035	g_free(url);
1036	}
1037
1038	void twitter_status_retweet(struct im_connection *ic, guint64 id)
1039	{
1040	char *url;
1041	url = g_strdup_printf("%s%llu%s", TWITTER_STATUS_RETWEET_URL,
1042	(unsigned long long) id, ".json");
1043	twitter_http(ic, url, twitter_http_post, ic, 1, NULL, 0);
1044	g_free(url);
1045	}
1046
1047	/**
1048	* Report a user for sending spam.
1049	*/
1050	void twitter_report_spam(struct im_connection ic, char screen_name)
1051	{
1052	char *args[2] = {
1053	"screen_name",
1054	NULL,
1055	};
1056	args[1] = screen_name;
1057	twitter_http(ic, TWITTER_REPORT_SPAM_URL, twitter_http_post,
1058	ic, 1, args, 2);
1059	}
1060
1061	/**
1062	* Favourite a tweet.
1063	*/
1064	void twitter_favourite_tweet(struct im_connection *ic, guint64 id)
1065	{
1066	char *url;
1067	url = g_strdup_printf("%s%llu%s", TWITTER_FAVORITE_CREATE_URL,
1068	(unsigned long long) id, ".json");
1069	twitter_http(ic, url, twitter_http_post, ic, 1, NULL, 0);
1070	g_free(url);
1071	}

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