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/*
* Copyright (C) 2008, Nokia <ivan.frade@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "config.h"
#include <string.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <libtracker-sparql/tracker-sparql.h>
/**
* SECTION:tracker-media-art
* @title: Media art management
* @short_description: Media art request and management.
* @include: libtracker-miner/tracker-media-art.h
*
* This is a convenience API using D-Bus to talk to the media management service.
**/
static gboolean had_any = FALSE;
static guint timer_id = 0;
static void
on_query_finished (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
GError *error = NULL;
TrackerSparqlCursor *cursor = NULL;
GDir *dir = NULL;
GHashTable *table = NULL;
const gchar *name;
gchar *dirname = NULL;
GList *to_remove = NULL;
cursor = tracker_sparql_connection_query_finish (TRACKER_SPARQL_CONNECTION (source_object),
res,
&error);
if (error) {
goto on_error;
}
dirname = g_build_filename (g_get_user_cache_dir (),
"media-art",
NULL);
if (!g_file_test (dirname, G_FILE_TEST_EXISTS)) {
/* Ignore this and just quit the function */
goto on_error;
}
dir = g_dir_open (dirname, 0, &error);
if (error) {
goto on_error;
}
table = g_hash_table_new_full (g_str_hash,
g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) NULL);
while (tracker_sparql_cursor_next (cursor, NULL, NULL)) {
gchar *target = NULL, *album_path = NULL;
const gchar *album, *artist;
album = tracker_sparql_cursor_get_string (cursor, 0, NULL);
artist = tracker_sparql_cursor_get_value_type (cursor, 1) != TRACKER_SPARQL_VALUE_TYPE_UNBOUND ? tracker_sparql_cursor_get_string (cursor, 1, NULL) : NULL;
/* The get_path API does stripping itself */
tracker_media_art_get_path (artist,
album,
"album", NULL,
&target, NULL);
g_hash_table_replace (table, target, target);
/* Also add the file to which the symlinks are made */
tracker_media_art_get_path (NULL,
album,
"album", NULL,
&album_path, NULL);
g_hash_table_replace (table, album_path, album_path);
}
/* Perhaps we should have an internal list of media art files that we made,
* instead of going over all the media art (which could also have been made
* by other softwares) */
for (name = g_dir_read_name (dir); name != NULL; name = g_dir_read_name (dir)) {
gpointer value;
gchar *full;
full = g_build_filename (dirname, name, NULL);
value = g_hash_table_lookup (table, full);
if (!value) {
g_message ("Removing media-art file %s: no album exists that has "
"any songs for this media-art cache", name);
to_remove = g_list_prepend (to_remove, (gpointer) full);
} else {
g_free (full);
}
}
g_list_foreach (to_remove, (GFunc) g_unlink, NULL);
g_list_foreach (to_remove, (GFunc) g_free, NULL);
g_list_free (to_remove);
on_error:
g_free (dirname);
if (table) {
g_hash_table_unref (table);
}
if (cursor) {
g_object_unref (cursor);
}
if (dir) {
g_dir_close (dir);
}
if (error) {
g_critical ("Error running cleanup of media-art: %s",
error->message ? error->message : "No error given");
g_error_free (error);
}
}
/**
* tracker_media_art_queue_remove:
* @uri: URI of the file
* @mime_type: mime-type of the file
*
* Adds a new request to tell the media art subsystem that @uri was removed.
* Stored requests can be processed with tracker_media_art_queue_empty().
*
* Returns: #TRUE if successfully stored to be reported, #FALSE otherwise.
*
* Since: 0.10.4
*/
gboolean
tracker_media_art_queue_remove (const gchar *uri,
const gchar *mime_type)
{
/* mime_type can be NULL */
g_return_val_if_fail (uri != NULL, FALSE);
if (mime_type && (g_str_has_prefix (mime_type, "video/") || g_str_has_prefix (mime_type, "audio/"))) {
had_any = TRUE;
}
return TRUE;
}
static gboolean
on_timer_callback (gpointer data)
{
TrackerSparqlConnection *connection = data;
tracker_sparql_connection_query_async (connection,
"SELECT ?title nmm:artistName (?artist) WHERE { "
" ?mpiece nmm:musicAlbum ?album . "
" ?album nmm:albumTitle ?title . "
" OPTIONAL { ?album nmm:albumArtist ?artist } "
"}",
NULL,
on_query_finished,
NULL);
return FALSE;
}
static void
on_timer_destroy (gpointer data)
{
TrackerSparqlConnection *connection = data;
g_object_unref (connection);
timer_id = 0;
}
/**
* tracker_media_art_queue_execute:
*
* Process all stored media art requests.
*
* Since: 0.10.4
*/
void
tracker_media_art_queue_empty (TrackerSparqlConnection *connection)
{
if (had_any && timer_id == 0) {
timer_id = g_timeout_add_seconds_full (G_PRIORITY_LOW,
1800 /* Half an hour worth of seconds*/,
on_timer_callback,
g_object_ref (connection),
on_timer_destroy);
had_any = FALSE;
}
}
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