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.
30 #include <glib/gi18n.h>
33 /* Claws Mail includes */
36 #include <common/utils.h>
39 #include "libfeed/date.h"
40 #include "libfeed/feeditem.h"
43 #include "rssyl_deleted.h"
44 #include "rssyl_feed.h"
45 #include "rssyl_parse_feed.h"
48 /* rssyl_cb_feed_compare()
50 * GCompareFunc function called by glib2's g_slist_find_custom().
53 static gint rssyl_cb_feed_compare(const FeedItem *a, const FeedItem *b)
55 gboolean date_eq = FALSE, url_eq = FALSE, title_eq = FALSE;
56 gboolean pubdate_eq = FALSE, moddate_eq = FALSE;
57 gboolean no_url = FALSE, no_date = FALSE, no_title = FALSE;
58 gboolean no_pubdate = FALSE, no_moddate = FALSE;
59 gchar *atit = NULL, *btit = NULL;
61 g_return_val_if_fail(a != NULL && b != NULL, 1);
63 /* ID should be unique. If it matches, we've found what we came for. */
64 if( (a->id != NULL) && (b->id != NULL) ) {
65 if( !strcmp(a->id, b->id) ) {
69 /* If both IDs are present, but they do not match, these are not the
70 * droids we're looking for. */
74 /* Ok, we have no ID to aid us. Let's have a look at item timestamps
75 * and item title & url. */
76 if( (a->url != NULL) && (b->url != NULL) ) {
77 if( !strcmp(a->url, b->url) )
82 /* Now we prepare some boolean flags to help us express comparing choices
86 if( (a->title != NULL) && (b->title != NULL) ) {
87 atit = conv_unmime_header(a->title, CS_UTF_8, FALSE);
88 btit = conv_unmime_header(b->title, CS_UTF_8, FALSE);
89 if( !strcmp(atit, btit) )
97 if (b->date_published <= 0) {
100 if (a->date_published == b->date_published)
105 if (b->date_modified <= 0) {
108 if (a->date_modified == b->date_modified)
112 if (no_pubdate && no_moddate)
115 if (pubdate_eq || (no_pubdate && moddate_eq))
118 /* If timestamp and url match, it is reasonable to assume
119 * we found our item. */
120 if (url_eq && date_eq)
123 /* Likewise if timestamp and title match. */
124 if (title_eq && date_eq)
127 /* There is no timestamp and the url matches (or there is none),
128 * we need to compare titles, ... */
129 if( (no_url || url_eq) && no_date ) {
136 /* ... and as a last resort, if there is no title, item texts. */
137 if( no_title && a->text && b->text ) {
138 if( !strcmp(a->text, b->text) )
144 /* We don't know this item. */
150 ITEM_CHANGED_TEXTONLY,
154 static gint rssyl_feed_item_changed(FeedItem *new_item, FeedItem *old_item )
156 debug_print("RSSyl: comparing '%s' and '%s'\n",
157 new_item->title, old_item->title);
159 /* if both have title ... */
160 if( old_item->title && new_item->title ) {
161 gchar *old = conv_unmime_header(old_item->title, CS_UTF_8, FALSE);
162 gchar *new = conv_unmime_header(new_item->title, CS_UTF_8, FALSE);
163 if( strcmp(old, new) != 0 ) { /* ... compare "unmimed" titles */
164 debug_print("RSSyl:\t\titem titles differ:\nOLD: '%s'\nNEW: '%s'\n",
173 /* if atleast one has a title, they differ */
174 if( old_item->title || new_item->title ) {
175 debug_print("RSSyl:\t\t+/- title\n");
180 if( old_item->author && new_item->author ) {
181 gchar *old = conv_unmime_header(old_item->author, CS_UTF_8, TRUE);
182 gchar *new = conv_unmime_header(new_item->author, CS_UTF_8, TRUE);
183 if( strcmp(old, new) ) { /* ... compare "unmimed" authors */
186 debug_print("RSSyl:\t\titem authors differ\n");
192 /* if atleast one has author, they differ */
193 if( old_item->author || new_item->author ) {
194 debug_print("RSSyl:\t\t+/- author\n");
199 /* if both have text ... */
200 if( old_item->text && new_item->text ) {
201 if( strcmp(old_item->text, new_item->text) ) { /* ... compare them */
202 debug_print("RSSyl:\t\titem texts differ\n");
203 debug_print("\nOLD: '%s'\n", old_item->text);
204 debug_print("\nNEW: '%s'\n", new_item->text);
206 return ITEM_CHANGED_TEXTONLY;
209 /* if at least one has some text, they differ */
210 if( old_item->text || new_item->text ) {
211 debug_print("RSSyl:\t\t+/- text\n");
212 return ITEM_CHANGED_TEXTONLY;
216 /* they don't seem to differ */
217 return ITEM_UNCHANGED;
224 EXISTS_CHANGED_TEXTONLY
227 /* rssyl_feed_item_exists()
229 * Returns 1 if a feed item already exists locally, 2 if there's a changed
230 * item with link that already belongs to existing item, 3 if only item's
231 * text has changed, 0 if item is new.
234 static guint rssyl_feed_item_exists(RFolderItem *ritem, FeedItem *fitem,
238 FeedItem *efitem = NULL;
241 g_return_val_if_fail(ritem != NULL, FALSE);
242 g_return_val_if_fail(fitem != NULL, FALSE);
244 if( ritem->items == NULL || g_slist_length(ritem->items) == 0 )
247 if( (item = g_slist_find_custom(ritem->items,
248 (gconstpointer)fitem, (GCompareFunc)rssyl_cb_feed_compare)) ) {
249 efitem = (FeedItem *)item->data;
250 if( (changed = rssyl_feed_item_changed(fitem, efitem)) > ITEM_UNCHANGED ) {
252 if (changed == ITEM_CHANGED_TEXTONLY)
253 return EXISTS_CHANGED_TEXTONLY;
255 return EXISTS_CHANGED;
258 return EXISTS_UNCHANGED;
264 /* =============================================================== */
266 void rssyl_add_item(RFolderItem *ritem, FeedItem *feed_item)
268 FeedItem *old_item = NULL;
270 MsgPermFlags oldperm_flags = 0;
275 gchar *meta_charset = NULL;
276 gchar *baseurl = NULL;
277 gchar *template = NULL;
278 gchar *tmp = NULL, *tmpurl = NULL, *tmpid = NULL;
279 gchar *dirname = NULL;
281 gchar *heading = NULL;
283 FeedItemEnclosure *enc = NULL;
286 g_return_if_fail(ritem != NULL);
288 /* If item title is empty, try to fill it from source title (Atom only). */
289 tmp = feed_item_get_sourcetitle(feed_item);
290 if( feed_item_get_title(feed_item) == NULL ||
291 strlen(feed_item->title) == 0 ) {
292 if( tmp != NULL && strlen(tmp) > 0 )
293 feed_item_set_title(feed_item, tmp);
295 feed_item_set_title(feed_item, C_("Empty RSS feed title placeholder", "(empty)"));
299 if (feed_item_get_id(feed_item) == NULL) {
300 debug_print("RSSyl: item ID empty, using its URL as ID.\n");
301 feed_item_set_id(feed_item, feed_item_get_url(feed_item));
305 /* If neither item date is set, use date from source (Atom only). */
306 if( feed_item_get_date_modified(feed_item) == -1 &&
307 feed_item_get_date_published(feed_item) == -1 )
308 feed_item_set_date_published(feed_item,
309 feed_item_get_sourcedate(feed_item));
311 /* Fix up subject, url and ID (rssyl_format_string()) so that
312 * comparing doesn't break. */
313 debug_print("RSSyl: fixing up subject '%s'\n", feed_item_get_title(feed_item));
314 feed_item_set_title(feed_item, rssyl_format_string(feed_item_get_title(feed_item), TRUE, TRUE));
315 debug_print("RSSyl: fixing up URL\n");
316 feed_item_set_url(feed_item, rssyl_format_string(feed_item_get_url(feed_item),
318 if( feed_item_get_id(feed_item) != NULL ) {
319 debug_print("RSSyl: fixing up ID\n");
320 feed_item_set_id(feed_item, rssyl_format_string(feed_item_get_id(feed_item),
324 /* If there's a summary, but no text, use summary as text. */
325 if( feed_item_get_text(feed_item) == NULL &&
326 (tmp = feed_item_get_summary(feed_item)) != NULL ) {
327 feed_item_set_text(feed_item, tmp);
328 g_free(feed_item->summary); /* We do not need summary in rssyl now. */
329 feed_item->summary = NULL;
332 /* Do not add if the item already exists, update if it does exist, but
334 dif = rssyl_feed_item_exists(ritem, feed_item, &old_item);
335 debug_print("RSSyl: rssyl_feed_item_exists returned %d\n", dif);
337 if( dif == EXISTS_UNCHANGED ) {
338 debug_print("RSSyl: This item already exists, skipping...\n");
342 /* Item is already in the list, but has changed */
343 if( dif >= EXISTS_CHANGED && old_item != NULL ) {
344 debug_print("RSSyl: Item changed, removing old one and adding new.\n");
346 /* Store permflags of the old item. */
347 ctx = (RFeedCtx *)old_item->data;
348 msginfo = folder_item_get_msginfo((FolderItem *)ritem,
349 atoi(g_path_get_basename(ctx->path)));
350 oldperm_flags = msginfo->flags.perm_flags;
352 ritem->items = g_slist_remove(ritem->items, old_item);
353 if (g_unlink(ctx->path) != 0) {
354 debug_print("RSSyl: Error, could not delete file '%s': %s\n",
355 ctx->path, g_strerror(errno));
359 feed_item_free(old_item);
363 /* Check against list of deleted items. */
364 if (rssyl_deleted_check(ritem->deleted_items, feed_item)) {
365 debug_print("RSSyl: Item '%s' found among deleted items, NOT adding it.\n",
366 feed_item_get_title(feed_item));
370 /* Add a new item, formatting its title along the way */
371 debug_print("RSSyl: Adding item '%s'\n", feed_item_get_title(feed_item));
372 ritem->items = g_slist_prepend(ritem->items, feed_item_copy(feed_item));
374 dirname = folder_item_get_path(&ritem->item);
375 template = g_strconcat(dirname, G_DIR_SEPARATOR_S,
376 RSSYL_TMP_TEMPLATE, NULL);
377 if ((fd = g_mkstemp(template)) < 0) {
378 g_warning("Couldn't g_mkstemp('%s'), not adding message!\n", template);
385 g_warning("Couldn't open file '%s', not adding message!\n", template);
391 if( (tmp = feed_item_get_author(feed_item)) != NULL ) {
392 if( g_utf8_validate(tmp, -1, NULL)) {
393 conv_encode_header_full(hdr, 1023, tmp, strlen("From: "),
395 fprintf(f, "From: %s\n", hdr);
397 fprintf(f, "From: %s\n", tmp);
401 if( (tmpd = feed_item_get_date_modified(feed_item)) != -1 ) {
402 tmp = createRFC822Date(&tmpd);
403 debug_print("RSSyl: using date_modified: '%s'\n", tmp);
404 } else if( (tmpd = feed_item_get_date_published(feed_item)) != -1 ) {
405 tmp = createRFC822Date(&tmpd);
406 debug_print("RSSyl: using date_published: '%s'\n", tmp);
409 tmp = createRFC822Date(&tmpd);
413 fprintf(f, "Date: %s\n", tmp);
417 if( (tmp = feed_item_get_title(feed_item)) != NULL ) {
419 /* (Atom only) Strip HTML markup from title for the Subject line. */
420 if( feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_HTML
421 || feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_XHTML) {
422 debug_print("RSSyl: item title is HTML/XHTML, stripping tags for Subject line\n");
427 if( g_utf8_validate(tmp, -1, NULL) ) {
428 conv_encode_header_full(hdr, 1023, tmp, strlen("Subject: "),
430 debug_print("RSSyl: Subject: %s\n", hdr);
431 fprintf(f, "Subject: %s\n", hdr);
433 fprintf(f, "Subject: %s\n", tmp);
435 if( feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_HTML
436 || feed_item_get_title_format(feed_item) == FEED_ITEM_TITLE_XHTML) {
438 fprintf(f, "X-RSSyl-OrigTitle: %s\n", feed_item_get_title(feed_item));
441 debug_print("RSSyl: No feed title, it seems\n");
442 fprintf(f, "Subject: (empty)\n");
446 if( (tmpurl = feed_item_get_url(feed_item)) == NULL ) {
447 if( feed_item_get_id(feed_item) != NULL &&
448 feed_item_id_is_permalink(feed_item) ) {
449 tmpurl = feed_item_get_id(feed_item);
454 fprintf(f, "X-RSSyl-URL: %s\n", tmpurl);
456 if( ritem->last_update > 0) {
457 fprintf(f, "X-RSSyl-Last-Seen: %ld\n", ritem->last_update);
461 if( (tmpid = feed_item_get_id(feed_item)) == NULL )
462 tmpid = feed_item_get_url(feed_item);
464 fprintf(f, "Message-ID: <%s>\n", tmpid);
466 /* X-RSSyl-Comments */
467 if( (text = feed_item_get_comments_url(feed_item)) != NULL )
468 fprintf(f, "X-RSSyl-Comments: %s\n", text);
471 if( (text = feed_item_get_parent_id(feed_item)) != NULL )
472 fprintf(f, "References: <%s>\n", text);
475 text = feed_item_get_text(feed_item);
476 if( text && g_utf8_validate(text, -1, NULL) ) {
477 fprintf(f, "Content-Type: text/html; charset=UTF-8\n\n");
478 meta_charset = g_strdup("<meta http-equiv=\"Content-Type\" "
479 "content=\"text/html; charset=UTF-8\">");
481 fprintf(f, "Content-Type: text/html\n\n");
484 /* construct base href */
485 if( feed_item_get_url(feed_item) != NULL )
486 baseurl = g_strdup_printf("<base href=\"%s\">\n",
487 feed_item_get_url(feed_item) );
489 if( ritem->write_heading )
490 heading = g_strdup_printf("<h2>%s</h2>\n<br><br>\n",
491 feed_item_get_title(feed_item));
494 fprintf(f, "<html><head>"
499 "URL: <a href=\"%s\">%s</a>\n\n<br><br>\n"
502 RSSYL_TEXT_END"\n\n",
503 (meta_charset ? meta_charset : ""),
504 (baseurl ? baseurl : ""),
505 (heading ? heading : ""),
506 (tmpurl ? tmpurl : ""),
507 (tmpurl ? tmpurl : "n/a"),
508 (text ? text : ""), (text ? "\n" : "") );
510 g_free(meta_charset);
514 if( (enc = feed_item_get_enclosure(feed_item)) != NULL )
515 fprintf(f, "<p><a href=\"%s\">Attached media file</a> [%s] (%ld bytes)</p>\n",
516 feed_item_enclosure_get_url(enc),
517 feed_item_enclosure_get_type(enc),
518 feed_item_enclosure_get_size(enc) );
520 fprintf(f, "</body></html>\n");
523 g_return_if_fail(template != NULL);
525 flags = g_new(MsgFlags, 1);
526 flags->perm_flags = MSG_NEW | MSG_UNREAD;
527 flags->tmp_flags = 0;
529 d = folder_item_add_msg(&ritem->item, template, flags, TRUE);
532 ctx = g_new0(RFeedCtx, 1);
533 ctx->path = (gpointer)g_strdup_printf("%s%c%d", dirname,
535 ctx->last_seen = ritem->last_update;
536 ((FeedItem *)ritem->items->data)->data = (gpointer)ctx;
538 /* Unset unread+new if the changed item wasn't set unread and user
539 * doesn't want to see it unread because of the change. */
540 if (dif != EXISTS_NEW) {
541 if (!(oldperm_flags & MSG_UNREAD) && (ritem->silent_update == 2
542 || (ritem->silent_update == 1 && dif == EXISTS_CHANGED_TEXTONLY)))
543 procmsg_msginfo_unset_flags(
544 folder_item_get_msginfo((FolderItem *)ritem, d), MSG_NEW | MSG_UNREAD, 0);
547 debug_print("RSSyl: folder_item_add_msg(): %d\n", d);