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/* notmuch - Not much of an email program, (just index and search)
*
* Copyright © 2009 Carl Worth
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/ .
*
* Author: Carl Worth <cworth@cworth.org>
*/
#include "notmuch-client.h"
static volatile sig_atomic_t interrupted;
static void
handle_sigint (unused (int sig))
{
static char msg[] = "Stopping... \n";
(void) write(2, msg, sizeof(msg)-1);
interrupted = 1;
}
static char *
_escape_tag (char *buf, const char *tag)
{
const char *in = tag;
char *out = buf;
/* Boolean terms surrounded by double quotes can contain any
* character. Double quotes are quoted by doubling them. */
*out++ = '"';
while (*in) {
if (*in == '"')
*out++ = '"';
*out++ = *in++;
}
*out++ = '"';
*out = 0;
return buf;
}
static char *
_optimize_tag_query (void *ctx, const char *orig_query_string, char *argv[],
int *add_tags, int add_tags_count,
int *remove_tags, int remove_tags_count)
{
/* This is subtler than it looks. Xapian ignores the '-' operator
* at the beginning both queries and parenthesized groups and,
* furthermore, the presence of a '-' operator at the beginning of
* a group can inhibit parsing of the previous operator. Hence,
* the user-provided query MUST appear first, but it is safe to
* parenthesize and the exclusion part of the query must not use
* the '-' operator (though the NOT operator is fine). */
char *escaped, *query_string;
const char *join = "";
int i;
unsigned int max_tag_len = 0;
/* Allocate a buffer for escaping tags. This is large enough to
* hold a fully escaped tag with every character doubled plus
* enclosing quotes and a NUL. */
for (i = 0; i < add_tags_count; i++)
if (strlen (argv[add_tags[i]] + 1) > max_tag_len)
max_tag_len = strlen (argv[add_tags[i]] + 1);
for (i = 0; i < remove_tags_count; i++)
if (strlen (argv[remove_tags[i]] + 1) > max_tag_len)
max_tag_len = strlen (argv[remove_tags[i]] + 1);
escaped = talloc_array(ctx, char, max_tag_len * 2 + 3);
if (!escaped)
return NULL;
/* Build the new query string */
if (strcmp (orig_query_string, "*") == 0)
query_string = talloc_strdup (ctx, "(");
else
query_string = talloc_asprintf (ctx, "( %s ) and (", orig_query_string);
for (i = 0; i < add_tags_count && query_string; i++) {
query_string = talloc_asprintf_append_buffer (
query_string, "%snot tag:%s", join,
_escape_tag (escaped, argv[add_tags[i]] + 1));
join = " or ";
}
for (i = 0; i < remove_tags_count && query_string; i++) {
query_string = talloc_asprintf_append_buffer (
query_string, "%stag:%s", join,
_escape_tag (escaped, argv[remove_tags[i]] + 1));
join = " or ";
}
if (query_string)
query_string = talloc_strdup_append_buffer (query_string, ")");
talloc_free (escaped);
return query_string;
}
int
notmuch_tag_command (void *ctx, unused (int argc), unused (char *argv[]))
{
int *add_tags, *remove_tags;
int add_tags_count = 0;
int remove_tags_count = 0;
char *query_string;
notmuch_config_t *config;
notmuch_database_t *notmuch;
notmuch_query_t *query;
notmuch_messages_t *messages;
notmuch_message_t *message;
struct sigaction action;
notmuch_bool_t synchronize_flags;
int i;
/* Setup our handler for SIGINT */
memset (&action, 0, sizeof (struct sigaction));
action.sa_handler = handle_sigint;
sigemptyset (&action.sa_mask);
action.sa_flags = SA_RESTART;
sigaction (SIGINT, &action, NULL);
add_tags = talloc_size (ctx, argc * sizeof (int));
if (add_tags == NULL) {
fprintf (stderr, "Out of memory.\n");
return 1;
}
remove_tags = talloc_size (ctx, argc * sizeof (int));
if (remove_tags == NULL) {
fprintf (stderr, "Out of memory.\n");
return 1;
}
argc--; argv++; /* skip subcommand argument */
for (i = 0; i < argc; i++) {
if (strcmp (argv[i], "--") == 0) {
i++;
break;
}
if (argv[i][0] == '+') {
add_tags[add_tags_count++] = i;
} else if (argv[i][0] == '-') {
remove_tags[remove_tags_count++] = i;
} else {
break;
}
}
if (add_tags_count == 0 && remove_tags_count == 0) {
fprintf (stderr, "Error: 'notmuch tag' requires at least one tag to add or remove.\n");
return 1;
}
query_string = query_string_from_args (ctx, argc - i, &argv[i]);
if (*query_string == '\0') {
fprintf (stderr, "Error: notmuch tag requires at least one search term.\n");
return 1;
}
/* Optimize the query so it excludes messages that already have
* the specified set of tags. */
query_string = _optimize_tag_query (ctx, query_string, argv,
add_tags, add_tags_count,
remove_tags, remove_tags_count);
if (query_string == NULL) {
fprintf (stderr, "Out of memory.\n");
return 1;
}
config = notmuch_config_open (ctx, NULL, NULL);
if (config == NULL)
return 1;
notmuch = notmuch_database_open (notmuch_config_get_database_path (config),
NOTMUCH_DATABASE_MODE_READ_WRITE);
if (notmuch == NULL)
return 1;
synchronize_flags = notmuch_config_get_maildir_synchronize_flags (config);
query = notmuch_query_create (notmuch, query_string);
if (query == NULL) {
fprintf (stderr, "Out of memory.\n");
return 1;
}
/* tagging is not interested in any special sort order */
notmuch_query_set_sort (query, NOTMUCH_SORT_UNSORTED);
for (messages = notmuch_query_search_messages (query);
notmuch_messages_valid (messages) && !interrupted;
notmuch_messages_move_to_next (messages))
{
message = notmuch_messages_get (messages);
notmuch_message_freeze (message);
for (i = 0; i < remove_tags_count; i++)
notmuch_message_remove_tag (message,
argv[remove_tags[i]] + 1);
for (i = 0; i < add_tags_count; i++)
notmuch_message_add_tag (message, argv[add_tags[i]] + 1);
notmuch_message_thaw (message);
if (synchronize_flags)
notmuch_message_tags_to_maildir_flags (message);
notmuch_message_destroy (message);
}
notmuch_query_destroy (query);
notmuch_database_close (notmuch);
return interrupted;
}
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