1 /* thread.cc - Results of thread-based searches from a notmuch database
3 * Copyright © 2009 Carl Worth
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see https://www.gnu.org/licenses/ .
18 * Author: Carl Worth <cworth@cworth.org>
21 #include "notmuch-private.h"
22 #include "database-private.h"
24 #include <gmime/gmime.h>
25 #include <glib.h> /* GHashTable */
27 #define EMPTY_STRING(s) ((s)[0] == '\0')
29 struct _notmuch_thread {
30 notmuch_database_t *notmuch;
33 GHashTable *authors_hash;
34 GPtrArray *authors_array;
35 GHashTable *matched_authors_hash;
36 GPtrArray *matched_authors_array;
40 /* All messages, oldest first. */
41 notmuch_message_list_t *message_list;
42 /* Top-level messages, oldest first. */
43 notmuch_message_list_t *toplevel_list;
45 GHashTable *message_hash;
54 _notmuch_thread_destructor (notmuch_thread_t *thread)
56 g_hash_table_unref (thread->authors_hash);
57 g_hash_table_unref (thread->matched_authors_hash);
58 g_hash_table_unref (thread->tags);
59 g_hash_table_unref (thread->message_hash);
61 if (thread->authors_array) {
62 g_ptr_array_free (thread->authors_array, true);
63 thread->authors_array = NULL;
66 if (thread->matched_authors_array) {
67 g_ptr_array_free (thread->matched_authors_array, true);
68 thread->matched_authors_array = NULL;
74 /* Add each author of the thread to the thread's authors_hash and to
75 * the thread's authors_array. */
77 _thread_add_author (notmuch_thread_t *thread,
85 if (g_hash_table_lookup_extended (thread->authors_hash,
89 author_copy = talloc_strdup (thread, author);
91 g_hash_table_insert (thread->authors_hash, author_copy, NULL);
93 g_ptr_array_add (thread->authors_array, author_copy);
96 /* Add each matched author of the thread to the thread's
97 * matched_authors_hash and to the thread's matched_authors_array. */
99 _thread_add_matched_author (notmuch_thread_t *thread,
107 if (g_hash_table_lookup_extended (thread->matched_authors_hash,
111 author_copy = talloc_strdup (thread, author);
113 g_hash_table_insert (thread->matched_authors_hash, author_copy, NULL);
115 g_ptr_array_add (thread->matched_authors_array, author_copy);
118 /* Construct an authors string from matched_authors_array and
119 * authors_array. The string contains matched authors first, then
120 * non-matched authors (with the two groups separated by '|'). Within
121 * each group, authors are listed in date order. */
123 _resolve_thread_authors_string (notmuch_thread_t *thread)
127 int first_non_matched_author = 1;
129 /* First, list all matched authors in date order. */
130 for (i = 0; i < thread->matched_authors_array->len; i++) {
131 author = (char *) g_ptr_array_index (thread->matched_authors_array, i);
133 thread->authors = talloc_asprintf (thread, "%s, %s",
137 thread->authors = author;
140 /* Next, append any non-matched authors that haven't already appeared. */
141 for (i = 0; i < thread->authors_array->len; i++) {
142 author = (char *) g_ptr_array_index (thread->authors_array, i);
143 if (g_hash_table_lookup_extended (thread->matched_authors_hash,
146 if (first_non_matched_author) {
147 thread->authors = talloc_asprintf (thread, "%s| %s",
151 thread->authors = talloc_asprintf (thread, "%s, %s",
156 first_non_matched_author = 0;
159 g_ptr_array_free (thread->authors_array, true);
160 thread->authors_array = NULL;
161 g_ptr_array_free (thread->matched_authors_array, true);
162 thread->matched_authors_array = NULL;
164 if (!thread->authors)
165 thread->authors = talloc_strdup(thread, "");
168 /* clean up the ugly "Lastname, Firstname" format that some mail systems
169 * (most notably, Exchange) are creating to be "Firstname Lastname"
170 * To make sure that we don't change other potential situations where a
171 * comma is in the name, we check that we match one of these patterns
172 * "Last, First" <first.last@company.com>
173 * "Last, First MI" <first.mi.last@company.com>
176 _thread_cleanup_author (notmuch_thread_t *thread,
177 const char *author, const char *from)
179 char *clean_author,*test_author;
186 clean_author = talloc_strdup(thread, author);
187 if (clean_author == NULL)
189 /* check if there's a comma in the name and that there's a
190 * component of the name behind it (so the name doesn't end with
191 * the comma - in which case the string that strchr finds is just
192 * one character long ",\0").
193 * Otherwise just return the copy of the original author name that
195 comma = strchr(author,',');
196 if (comma && strlen(comma) > 1) {
197 /* let's assemble what we think is the correct name */
198 lname = comma - author;
200 /* Skip all the spaces after the comma */
201 fname = strlen(author) - lname - 1;
203 while (*comma == ' ') {
207 strncpy(clean_author, comma, fname);
209 *(clean_author+fname) = ' ';
210 strncpy(clean_author + fname + 1, author, lname);
211 *(clean_author+fname+1+lname) = '\0';
212 /* make a temporary copy and see if it matches the email */
213 test_author = talloc_strdup(thread,clean_author);
215 blank=strchr(test_author,' ');
216 while (blank != NULL) {
218 blank=strchr(test_author,' ');
220 if (strcasestr(from, test_author) == NULL)
221 /* we didn't identify this as part of the email address
222 * so let's punt and return the original author */
223 strcpy (clean_author, author);
228 /* Add 'message' as a message that belongs to 'thread'.
230 * The 'thread' will talloc_steal the 'message' and hold onto a
234 _thread_add_message (notmuch_thread_t *thread,
235 notmuch_message_t *message,
236 notmuch_string_list_t *exclude_terms,
237 notmuch_exclude_t omit_exclude)
239 notmuch_tags_t *tags;
241 InternetAddressList *list = NULL;
242 InternetAddress *address;
243 const char *from, *author;
245 bool message_excluded = false;
247 if (omit_exclude != NOTMUCH_EXCLUDE_FALSE) {
248 for (tags = notmuch_message_get_tags (message);
249 notmuch_tags_valid (tags);
250 notmuch_tags_move_to_next (tags))
252 tag = notmuch_tags_get (tags);
253 /* Is message excluded? */
254 for (notmuch_string_node_t *term = exclude_terms->head;
258 /* Check for an empty string, and then ignore initial 'K'. */
259 if (*(term->string) && strcmp(tag, (term->string + 1)) == 0) {
260 message_excluded = true;
267 if (message_excluded && omit_exclude == NOTMUCH_EXCLUDE_ALL)
270 _notmuch_message_list_add_message (thread->message_list,
271 talloc_steal (thread, message));
272 thread->total_messages++;
273 thread->total_files += notmuch_message_count_files (message);
275 g_hash_table_insert (thread->message_hash,
276 xstrdup (notmuch_message_get_message_id (message)),
279 from = notmuch_message_get_header (message, "from");
281 list = internet_address_list_parse_string (from);
284 address = internet_address_list_get_address (list, 0);
286 author = internet_address_get_name (address);
287 /* We treat quoted empty names as if they were empty. */
288 if (author == NULL || author[0] == '\0') {
289 InternetAddressMailbox *mailbox;
290 mailbox = INTERNET_ADDRESS_MAILBOX (address);
291 author = internet_address_mailbox_get_addr (mailbox);
293 clean_author = _thread_cleanup_author (thread, author, from);
294 _thread_add_author (thread, clean_author);
295 _notmuch_message_set_author (message, clean_author);
297 g_object_unref (G_OBJECT (list));
300 if (! thread->subject) {
302 subject = notmuch_message_get_header (message, "subject");
303 thread->subject = talloc_strdup (thread, subject ? subject : "");
306 for (tags = notmuch_message_get_tags (message);
307 notmuch_tags_valid (tags);
308 notmuch_tags_move_to_next (tags))
310 tag = notmuch_tags_get (tags);
311 g_hash_table_insert (thread->tags, xstrdup (tag), NULL);
314 /* Mark excluded messages. */
315 if (message_excluded)
316 notmuch_message_set_flag (message, NOTMUCH_MESSAGE_FLAG_EXCLUDED, true);
320 _thread_set_subject_from_message (notmuch_thread_t *thread,
321 notmuch_message_t *message)
324 const char *cleaned_subject;
326 subject = notmuch_message_get_header (message, "subject");
330 if ((strncasecmp (subject, "Re: ", 4) == 0) ||
331 (strncasecmp (subject, "Aw: ", 4) == 0) ||
332 (strncasecmp (subject, "Vs: ", 4) == 0) ||
333 (strncasecmp (subject, "Sv: ", 4) == 0)) {
335 cleaned_subject = talloc_strndup (thread,
337 strlen(subject) - 4);
339 cleaned_subject = talloc_strdup (thread, subject);
342 if (! EMPTY_STRING(cleaned_subject)) {
344 talloc_free (thread->subject);
346 thread->subject = talloc_strdup (thread, cleaned_subject);
350 /* Add a message to this thread which is known to match the original
351 * search specification. The 'sort' parameter controls whether the
352 * oldest or newest matching subject is applied to the thread as a
355 _thread_add_matched_message (notmuch_thread_t *thread,
356 notmuch_message_t *message,
360 notmuch_message_t *hashed_message;
362 date = notmuch_message_get_date (message);
364 if (date < thread->oldest || ! thread->matched_messages) {
365 thread->oldest = date;
366 if (sort == NOTMUCH_SORT_OLDEST_FIRST)
367 _thread_set_subject_from_message (thread, message);
370 if (date > thread->newest || ! thread->matched_messages) {
371 thread->newest = date;
372 const char *cur_subject = notmuch_thread_get_subject(thread);
373 if (sort != NOTMUCH_SORT_OLDEST_FIRST || EMPTY_STRING(cur_subject))
374 _thread_set_subject_from_message (thread, message);
377 if (!notmuch_message_get_flag (message, NOTMUCH_MESSAGE_FLAG_EXCLUDED))
378 thread->matched_messages++;
380 if (g_hash_table_lookup_extended (thread->message_hash,
381 notmuch_message_get_message_id (message), NULL,
382 (void **) &hashed_message)) {
383 notmuch_message_set_flag (hashed_message,
384 NOTMUCH_MESSAGE_FLAG_MATCH, 1);
387 _thread_add_matched_author (thread, _notmuch_message_get_author (hashed_message));
391 _resolve_thread_relationships (notmuch_thread_t *thread)
393 notmuch_message_node_t *node, *first_node;
394 notmuch_message_t *message, *parent;
395 const char *in_reply_to;
397 first_node = thread->message_list->head;
401 for (node = first_node->next; node; node = node->next) {
402 message = node->message;
403 in_reply_to = _notmuch_message_get_in_reply_to (message);
404 if (in_reply_to && strlen (in_reply_to) &&
405 g_hash_table_lookup_extended (thread->message_hash,
408 _notmuch_message_add_reply (parent, message);
410 _notmuch_message_list_add_message (thread->toplevel_list, message);
414 * if we reach the end of the list without finding a top-level
415 * message, that means the thread is a cycle (or set of cycles)
416 * and any message can be considered top-level. Choose the oldest
417 * message, which happens to be first in our list.
420 message = first_node->message;
421 in_reply_to = _notmuch_message_get_in_reply_to (message);
422 if (thread->toplevel_list->head &&
423 in_reply_to && strlen (in_reply_to) &&
424 g_hash_table_lookup_extended (thread->message_hash,
427 _notmuch_message_add_reply (parent, message);
429 _notmuch_message_list_add_message (thread->toplevel_list, message);
432 /* XXX: After scanning through the entire list looking for parents
433 * via "In-Reply-To", we should do a second pass that looks at the
434 * list of messages IDs in the "References" header instead. (And
435 * for this the parent would be the "deepest" message of all the
436 * messages found in the "References" list.)
438 * Doing this will allow messages and sub-threads to be positioned
439 * correctly in the thread even when an intermediate message is
440 * missing from the thread.
444 /* Create a new notmuch_thread_t object by finding the thread
445 * containing the message with the given doc ID, treating any messages
446 * contained in match_set as "matched". Remove all messages in the
447 * thread from match_set.
449 * Creating the thread will perform a database search to get all
450 * messages belonging to the thread and will get the first subject
451 * line, the total count of messages, and all authors in the thread.
452 * Each message in the thread is checked against match_set to allow
453 * for a separate count of matched messages, and to allow a viewer to
454 * display these messages differently.
456 * Here, 'ctx' is talloc context for the resulting thread object.
458 * This function returns NULL in the case of any error.
461 _notmuch_thread_create (void *ctx,
462 notmuch_database_t *notmuch,
463 unsigned int seed_doc_id,
464 notmuch_doc_id_set_t *match_set,
465 notmuch_string_list_t *exclude_terms,
466 notmuch_exclude_t omit_excluded,
469 void *local = talloc_new (ctx);
470 notmuch_thread_t *thread = NULL;
471 notmuch_message_t *seed_message;
472 const char *thread_id;
473 char *thread_id_query_string;
474 notmuch_query_t *thread_id_query;
476 notmuch_messages_t *messages;
477 notmuch_message_t *message;
478 notmuch_status_t status;
480 seed_message = _notmuch_message_create (local, notmuch, seed_doc_id, NULL);
482 INTERNAL_ERROR ("Thread seed message %u does not exist", seed_doc_id);
484 thread_id = notmuch_message_get_thread_id (seed_message);
485 thread_id_query_string = talloc_asprintf (local, "thread:%s", thread_id);
486 if (unlikely (thread_id_query_string == NULL))
489 thread_id_query = talloc_steal (
490 local, notmuch_query_create (notmuch, thread_id_query_string));
491 if (unlikely (thread_id_query == NULL))
494 thread = talloc (local, notmuch_thread_t);
495 if (unlikely (thread == NULL))
498 talloc_set_destructor (thread, _notmuch_thread_destructor);
500 thread->notmuch = notmuch;
501 thread->thread_id = talloc_strdup (thread, thread_id);
502 thread->subject = NULL;
503 thread->authors_hash = g_hash_table_new_full (g_str_hash, g_str_equal,
505 thread->authors_array = g_ptr_array_new ();
506 thread->matched_authors_hash = g_hash_table_new_full (g_str_hash,
509 thread->matched_authors_array = g_ptr_array_new ();
510 thread->authors = NULL;
511 thread->tags = g_hash_table_new_full (g_str_hash, g_str_equal,
514 thread->message_list = _notmuch_message_list_create (thread);
515 thread->toplevel_list = _notmuch_message_list_create (thread);
516 if (unlikely (thread->message_list == NULL ||
517 thread->toplevel_list == NULL)) {
522 thread->message_hash = g_hash_table_new_full (g_str_hash, g_str_equal,
525 thread->total_messages = 0;
526 thread->total_files = 0;
527 thread->matched_messages = 0;
531 /* We use oldest-first order unconditionally here to obtain the
532 * proper author ordering for the thread. The 'sort' parameter
533 * passed to this function is used only to indicate whether the
534 * oldest or newest subject is desired. */
535 notmuch_query_set_sort (thread_id_query, NOTMUCH_SORT_OLDEST_FIRST);
537 status = notmuch_query_search_messages (thread_id_query, &messages);
542 notmuch_messages_valid (messages);
543 notmuch_messages_move_to_next (messages))
547 message = notmuch_messages_get (messages);
548 doc_id = _notmuch_message_get_doc_id (message);
549 if (doc_id == seed_doc_id)
550 message = seed_message;
552 _thread_add_message (thread, message, exclude_terms, omit_excluded);
554 if ( _notmuch_doc_id_set_contains (match_set, doc_id)) {
555 _notmuch_doc_id_set_remove (match_set, doc_id);
556 _thread_add_matched_message (thread, message, sort);
559 _notmuch_message_close (message);
562 _resolve_thread_authors_string (thread);
564 _resolve_thread_relationships (thread);
566 /* Commit to returning thread. */
567 (void) talloc_steal (ctx, thread);
575 notmuch_thread_get_toplevel_messages (notmuch_thread_t *thread)
577 return _notmuch_messages_create (thread->toplevel_list);
581 notmuch_thread_get_messages (notmuch_thread_t *thread)
583 return _notmuch_messages_create (thread->message_list);
587 notmuch_thread_get_thread_id (notmuch_thread_t *thread)
589 return thread->thread_id;
593 notmuch_thread_get_total_messages (notmuch_thread_t *thread)
595 return thread->total_messages;
599 notmuch_thread_get_total_files (notmuch_thread_t *thread)
601 return thread->total_files;
605 notmuch_thread_get_matched_messages (notmuch_thread_t *thread)
607 return thread->matched_messages;
611 notmuch_thread_get_authors (notmuch_thread_t *thread)
613 return thread->authors;
617 notmuch_thread_get_subject (notmuch_thread_t *thread)
619 return thread->subject;
623 notmuch_thread_get_oldest_date (notmuch_thread_t *thread)
625 return thread->oldest;
629 notmuch_thread_get_newest_date (notmuch_thread_t *thread)
631 return thread->newest;
635 notmuch_thread_get_tags (notmuch_thread_t *thread)
637 notmuch_string_list_t *tags;
640 tags = _notmuch_string_list_create (thread);
641 if (unlikely (tags == NULL))
644 keys = g_hash_table_get_keys (thread->tags);
646 for (l = keys; l; l = l->next)
647 _notmuch_string_list_append (tags, (char *) l->data);
651 _notmuch_string_list_sort (tags);
653 return _notmuch_tags_create (thread, tags);
657 notmuch_thread_destroy (notmuch_thread_t *thread)
659 talloc_free (thread);