2 * Claws-Mail-- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2004 Hiroyuki Yamamoto
4 * This file (C) 2005 Andrej Kacian <andrej@kacian.sk>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 #include <glib/gi18n.h>
32 /* Claws Mail includes */
35 #include <common/utils.h>
38 #include "libfeed/date.h"
39 #include "libfeed/feeditem.h"
42 #include "rssyl_deleted.h"
43 #include "rssyl_feed.h"
44 #include "rssyl_parse_feed.h"
47 /* rssyl_cb_feed_compare()
49 * GCompareFunc function called by glib2's g_slist_find_custom().
52 static gint rssyl_cb_feed_compare(const FeedItem *a, const FeedItem *b)
54 gboolean date_eq = FALSE, url_eq = FALSE, title_eq = FALSE;
55 gboolean no_url = FALSE, no_date = FALSE, no_title = FALSE;
56 gchar *atit = NULL, *btit = NULL;
58 g_return_val_if_fail(a != NULL && b != NULL, 1);
60 /* ID should be unique. If it matches, we've found what we came for. */
61 if( (a->id != NULL) && (b->id != NULL) ) {
62 if( !strcmp(a->id, b->id) ) {
66 /* If both IDs are present, but they do not match, these are not the
67 * droids we're looking for. */
71 /* Ok, we have no ID to aid us. Let's have a look at item timestamps
72 * and item title & url. */
73 if( (a->url != NULL) && (b->url != NULL) ) {
74 if( !strcmp(a->url, b->url) )
79 if( (a->title != NULL) && (b->title != NULL) ) {
80 atit = conv_unmime_header(a->title, CS_UTF_8, FALSE);
81 btit = conv_unmime_header(b->title, CS_UTF_8, FALSE);
82 if( !strcmp(atit, btit) )
89 /* If there's no 'published' timestamp for the item, we can only judge
90 * by item url - 'modified' timestamp can have changed if the item was
91 * updated recently. */
92 if( b->date_published <= 0 ) {
93 if( b->date_modified > 0 ) {
94 /* If the item has 'modified' timestamp, we can only rely on url
95 * and title at this point. */
96 if( (url_eq || no_url) && title_eq
97 && (a->date_modified >= b->date_modified) )
102 /* No timestamp of any kind, we'll just assume if both title and url
103 * match, we found the right item. Items in such feeds rarely change,
104 * and if they do, there's no way we can really */
105 if( (url_eq || no_url) && title_eq )
112 /* Check if 'published' or at least 'modified' timestamps match */
113 if( ((a->date_published > 0) && (b->date_published > 0) &&
114 (a->date_published == b->date_published))
115 || ((a->date_modified > 0) && (b->date_modified > 0) &&
116 (a->date_modified == b->date_modified))) {
121 /* If 'published' time and item url match, it is reasonable to assume
122 * we found our item. */
123 if( (no_url || url_eq) && date_eq )
126 /* There is no timestamp and the url matches (or there is none),
127 * we need to compare titles, ... */
128 if( (no_url || url_eq) && no_date ) {
135 /* ... and as a last resort, if there is no title, item texts. */
136 if( no_title && a->text && b->text ) {
137 if( !strcmp(a->text, b->text) )
143 /* We don't know this item. */
149 ITEM_CHANGED_TEXTONLY,
153 static gint rssyl_feed_item_changed(FeedItem *new_item, FeedItem *old_item )
155 debug_print("RSSyl: comparing '%s' and '%s'\n",
156 new_item->title, old_item->title);
158 /* if both have title ... */
159 if( old_item->title && new_item->title ) {
160 gchar *old = conv_unmime_header(old_item->title, CS_UTF_8, FALSE);
161 gchar *new = conv_unmime_header(new_item->title, CS_UTF_8, FALSE);
162 if( strcmp(old, new) != 0 ) { /* ... compare "unmimed" titles */
163 debug_print("RSSyl:\t\titem titles differ:\nOLD: '%s'\nNEW: '%s'\n",
172 /* if atleast one has a title, they differ */
173 if( old_item->title || new_item->title ) {
174 debug_print("RSSyl:\t\t+/- title\n");
179 if( old_item->author && new_item->author ) {
180 gchar *old = conv_unmime_header(old_item->author, CS_UTF_8, TRUE);
181 gchar *new = conv_unmime_header(new_item->author, CS_UTF_8, TRUE);
182 if( strcmp(old, new) ) { /* ... compare "unmimed" authors */
185 debug_print("RSSyl:\t\titem authors differ\n");
191 /* if atleast one has author, they differ */
192 if( old_item->author || new_item->author ) {
193 debug_print("RSSyl:\t\t+/- author\n");
198 /* if both have text ... */
199 if( old_item->text && new_item->text ) {
200 if( strcmp(old_item->text, new_item->text) ) { /* ... compare them */
201 debug_print("RSSyl:\t\titem texts differ\n");
202 debug_print("\nOLD: '%s'\n", old_item->text);
203 debug_print("\nNEW: '%s'\n", new_item->text);
205 return ITEM_CHANGED_TEXTONLY;
208 /* if at least one has some text, they differ */
209 if( old_item->text || new_item->text ) {
210 debug_print("RSSyl:\t\t+/- text\n");
211 return ITEM_CHANGED_TEXTONLY;
215 /* they don't seem to differ */
216 return ITEM_UNCHANGED;
223 EXISTS_CHANGED_TEXTONLY
226 /* rssyl_feed_item_exists()
228 * Returns 1 if a feed item already exists locally, 2 if there's a changed
229 * item with link that already belongs to existing item, 3 if only item's
230 * text has changed, 0 if item is new.
233 static guint rssyl_feed_item_exists(RFolderItem *ritem, FeedItem *fitem,
237 FeedItem *efitem = NULL;
240 g_return_val_if_fail(ritem != NULL, FALSE);
241 g_return_val_if_fail(fitem != NULL, FALSE);
243 if( ritem->items == NULL || g_slist_length(ritem->items) == 0 )
246 if( (item = g_slist_find_custom(ritem->items,
247 (gconstpointer)fitem, (GCompareFunc)rssyl_cb_feed_compare)) ) {
248 efitem = (FeedItem *)item->data;
249 if( (changed = rssyl_feed_item_changed(fitem, efitem)) > ITEM_UNCHANGED ) {
251 if (changed == ITEM_CHANGED_TEXTONLY)
252 return EXISTS_CHANGED_TEXTONLY;
254 return EXISTS_CHANGED;
257 return EXISTS_UNCHANGED;
263 /* =============================================================== */
265 void rssyl_add_item(RFolderItem *ritem, FeedItem *feed_item)
267 FeedItem *old_item = NULL;
269 MsgPermFlags oldperm_flags = 0;
272 gint fd, d, dif, errno = 0;
274 gchar *meta_charset = NULL;
275 gchar *baseurl = NULL;
276 gchar *template = NULL;
277 gchar *tmp = NULL, *tmpurl = NULL, *tmpid = NULL;
278 gchar *dirname = NULL;
280 gchar *heading = NULL;
282 FeedItemEnclosure *enc = NULL;
285 g_return_if_fail(ritem != NULL);
287 /* If item title is empty, try to fill it from source title (Atom only). */
288 tmp = feed_item_get_sourcetitle(feed_item);
289 if( feed_item_get_title(feed_item) == NULL ||
290 strlen(feed_item->title) == 0 ) {
291 if( tmp != NULL && strlen(tmp) > 0 )
292 feed_item_set_title(feed_item, tmp);
294 feed_item_set_title(feed_item, C_("Empty RSS feed title placeholder", "(empty)"));
298 if (feed_item_get_id(feed_item) == NULL) {
299 debug_print("RSSyl: item ID empty, using its URL as ID.\n");
300 feed_item_set_id(feed_item, feed_item_get_url(feed_item));
304 /* If neither item date is set, use date from source (Atom only). */
305 if( feed_item_get_date_modified(feed_item) == -1 &&
306 feed_item_get_date_published(feed_item) == -1 )
307 feed_item_set_date_published(feed_item,
308 feed_item_get_sourcedate(feed_item));
310 /* Fix up subject, url and ID (rssyl_format_string()) so that
311 * comparing doesn't break. */
312 debug_print("RSSyl: fixing up subject '%s'\n", feed_item_get_title(feed_item));
313 feed_item_set_title(feed_item, rssyl_format_string(feed_item_get_title(feed_item), TRUE, TRUE));
314 debug_print("RSSyl: fixing up URL\n");
315 feed_item_set_url(feed_item, rssyl_format_string(feed_item_get_url(feed_item),
317 if( feed_item_get_id(feed_item) != NULL ) {
318 debug_print("RSSyl: fixing up ID\n");
319 feed_item_set_id(feed_item, rssyl_format_string(feed_item_get_id(feed_item),
323 /* If there's a summary, but no text, use summary as text. */
324 if( feed_item_get_text(feed_item) == NULL &&
325 (tmp = feed_item_get_summary(feed_item)) != NULL ) {
326 feed_item_set_text(feed_item, tmp);
327 g_free(feed_item->summary); /* We do not need summary in rssyl now. */
328 feed_item->summary = NULL;
331 /* Do not add if the item already exists, update if it does exist, but
333 dif = rssyl_feed_item_exists(ritem, feed_item, &old_item);
334 debug_print("RSSyl: rssyl_feed_item_exists returned %d\n", dif);
336 if( dif == EXISTS_UNCHANGED ) {
337 debug_print("RSSyl: This item already exists, skipping...\n");
341 /* Item is already in the list, but has changed */
342 if( dif >= EXISTS_CHANGED && old_item != NULL ) {
343 debug_print("RSSyl: Item changed, removing old one and adding new.\n");
345 /* Store permflags of the old item. */
346 ctx = (RFeedCtx *)old_item->data;
347 msginfo = folder_item_get_msginfo((FolderItem *)ritem,
348 atoi(g_path_get_basename(ctx->path)));
349 oldperm_flags = msginfo->flags.perm_flags;
351 ritem->items = g_slist_remove(ritem->items, old_item);
352 if (g_unlink(ctx->path) != 0) {
353 debug_print("RSSyl: Error, could not delete file '%s': %s\n",
354 ctx->path, g_strerror(errno));
358 feed_item_free(old_item);
362 /* Check against list of deleted items. */
363 if (rssyl_deleted_check(ritem->deleted_items, feed_item)) {
364 debug_print("RSSyl: Item '%s' found among deleted items, NOT adding it.\n",
365 feed_item_get_title(feed_item));
369 /* Add a new item, formatting its title along the way */
370 debug_print("RSSyl: Adding item '%s'\n", feed_item_get_title(feed_item));
371 ritem->items = g_slist_prepend(ritem->items, feed_item_copy(feed_item));
373 dirname = folder_item_get_path(&ritem->item);
374 template = g_strconcat(dirname, G_DIR_SEPARATOR_S,
375 RSSYL_TMP_TEMPLATE, NULL);
376 if ((fd = mkstemp(template)) < 0) {
377 g_warning("Couldn't mkstemp('%s'), not adding message!\n", template);
384 g_warning("Couldn't open file '%s', not adding message!\n", template);
390 if( (tmp = feed_item_get_author(feed_item)) != NULL ) {
391 if( g_utf8_validate(tmp, -1, NULL)) {
392 conv_encode_header_full(hdr, 1023, tmp, strlen("From: "),
394 fprintf(f, "From: %s\n", hdr);
396 fprintf(f, "From: %s\n", tmp);
400 if( (tmpd = feed_item_get_date_modified(feed_item)) != -1 ) {
401 tmp = createRFC822Date(&tmpd);
402 debug_print("RSSyl: using date_modified: '%s'\n", tmp);
403 } else if( (tmpd = feed_item_get_date_published(feed_item)) != -1 ) {
404 tmp = createRFC822Date(&tmpd);
405 debug_print("RSSyl: using date_published: '%s'\n", tmp);
408 tmp = createRFC822Date(&tmpd);
412 fprintf(f, "Date: %s\n", tmp);
416 if( (tmp = feed_item_get_title(feed_item)) != NULL ) {
418 /* (Atom only) Strip HTML markup from title for the Subject line. */
419 if( feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_HTML
420 || feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_XHTML) {
421 debug_print("RSSyl: item title is HTML/XHTML, stripping tags for Subject line\n");
426 if( g_utf8_validate(tmp, -1, NULL) ) {
427 conv_encode_header_full(hdr, 1023, tmp, strlen("Subject: "),
429 debug_print("RSSyl: Subject: %s\n", hdr);
430 fprintf(f, "Subject: %s\n", hdr);
432 fprintf(f, "Subject: %s\n", tmp);
434 if( feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_HTML
435 || feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_XHTML) {
437 fprintf(f, "X-RSSyl-OrigTitle: %s\n", feed_item_get_title(feed_item));
440 debug_print("RSSyl: No feed title, it seems\n");
441 fprintf(f, "Subject: (empty)\n");
445 if( (tmpurl = feed_item_get_url(feed_item)) == NULL ) {
446 if( feed_item_get_id(feed_item) != NULL &&
447 feed_item_id_is_permalink(feed_item) ) {
448 tmpurl = feed_item_get_id(feed_item);
453 fprintf(f, "X-RSSyl-URL: %s\n", tmpurl);
455 if( ritem->last_update > 0) {
456 fprintf(f, "X-RSSyl-Last-Seen: %ld\n", ritem->last_update);
460 if( (tmpid = feed_item_get_id(feed_item)) == NULL )
461 tmpid = feed_item_get_url(feed_item);
463 fprintf(f, "Message-ID: <%s>\n", tmpid);
465 /* X-RSSyl-Comments */
466 if( (text = feed_item_get_comments_url(feed_item)) != NULL )
467 fprintf(f, "X-RSSyl-Comments: %s\n", text);
470 if( (text = feed_item_get_parent_id(feed_item)) != NULL )
471 fprintf(f, "References: <%s>\n", text);
474 text = feed_item_get_text(feed_item);
475 if( text && g_utf8_validate(text, -1, NULL) ) {
476 fprintf(f, "Content-Type: text/html; charset=UTF-8\n\n");
477 meta_charset = g_strdup("<meta http-equiv=\"Content-Type\" "
478 "content=\"text/html; charset=UTF-8\">");
480 fprintf(f, "Content-Type: text/html\n\n");
483 /* construct base href */
484 if( feed_item_get_url(feed_item) != NULL )
485 baseurl = g_strdup_printf("<base href=\"%s\">\n",
486 feed_item_get_url(feed_item) );
488 if( ritem->write_heading )
489 heading = g_strdup_printf("<h2>%s</h2>\n<br><br>\n",
490 feed_item_get_title(feed_item));
493 fprintf(f, "<html><head>"
498 "URL: <a href=\"%s\">%s</a>\n\n<br><br>\n"
501 RSSYL_TEXT_END"\n\n",
502 (meta_charset ? meta_charset : ""),
503 (baseurl ? baseurl : ""),
504 (heading ? heading : ""),
505 (tmpurl ? tmpurl : ""),
506 (tmpurl ? tmpurl : "n/a"),
507 (text ? text : ""), (text ? "\n" : "") );
509 g_free(meta_charset);
513 if( (enc = feed_item_get_enclosure(feed_item)) != NULL )
514 fprintf(f, "<p><a href=\"%s\">Attached media file</a> [%s] (%ld bytes)</p>\n",
515 feed_item_enclosure_get_url(enc),
516 feed_item_enclosure_get_type(enc),
517 feed_item_enclosure_get_size(enc) );
519 fprintf(f, "</body></html>\n");
522 g_return_if_fail(template != NULL);
524 flags = g_new(MsgFlags, 1);
525 flags->perm_flags = MSG_NEW | MSG_UNREAD;
526 flags->tmp_flags = 0;
528 d = folder_item_add_msg(&ritem->item, template, flags, TRUE);
531 ctx = g_new0(RFeedCtx, 1);
532 ctx->path = (gpointer)g_strdup_printf("%s%c%d", dirname,
534 ctx->last_seen = ritem->last_update;
535 ((FeedItem *)ritem->items->data)->data = (gpointer)ctx;
537 /* Unset unread+new if the changed item wasn't set unread and user
538 * doesn't want to see it unread because of the change. */
539 if (!(oldperm_flags & MSG_UNREAD) && (ritem->silent_update == 2
540 || (ritem->silent_update == 1 && dif == EXISTS_CHANGED_TEXTONLY)))
541 procmsg_msginfo_unset_flags(
542 folder_item_get_msginfo((FolderItem *)ritem, d), MSG_NEW | MSG_UNREAD, 0);
544 debug_print("RSSyl: folder_item_add_msg(): %d\n", d);