mpd/src/dbUtils.c

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/*
* Copyright (C) 2003-2009 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "dbUtils.h"
#include "locate.h"
#include "directory.h"
#include "database.h"
#include "client.h"
#include "playlist.h"
#include "song.h"
#include "song_print.h"
#include "tag.h"
#include "strset.h"
#include "stored_playlist.h"
#include <glib.h>
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#include <stdlib.h>
typedef struct _ListCommandItem {
int8_t tagType;
const struct locate_item_list *criteria;
} ListCommandItem;
typedef struct _SearchStats {
const struct locate_item_list *criteria;
int numberOfSongs;
unsigned long playTime;
} SearchStats;
static int
printDirectoryInDirectory(struct directory *directory, void *data)
{
struct client *client = data;
if (!directory_is_root(directory))
client_printf(client, "directory: %s\n", directory_get_path(directory));
return 0;
}
static int
printSongInDirectory(struct song *song, G_GNUC_UNUSED void *data)
{
struct client *client = data;
song_print_url(client, song);
return 0;
}
struct search_data {
struct client *client;
const struct locate_item_list *criteria;
};
static int
searchInDirectory(struct song *song, void *_data)
{
struct search_data *data = _data;
if (locate_song_search(song, data->criteria))
return song_print_info(data->client, song);
return 0;
}
int
searchForSongsIn(struct client *client, const char *name,
const struct locate_item_list *criteria)
{
int ret;
struct locate_item_list *new_list
= locate_item_list_casefold(criteria);
struct search_data data;
data.client = client;
data.criteria = new_list;
ret = db_walk(name, searchInDirectory, NULL, &data);
locate_item_list_free(new_list);
return ret;
}
static int
findInDirectory(struct song *song, void *_data)
{
struct search_data *data = _data;
if (locate_song_match(song, data->criteria))
return song_print_info(data->client, song);
return 0;
}
int
findSongsIn(struct client *client, const char *name,
const struct locate_item_list *criteria)
{
struct search_data data;
data.client = client;
data.criteria = criteria;
return db_walk(name, findInDirectory, NULL, &data);
}
static void printSearchStats(struct client *client, SearchStats *stats)
{
client_printf(client, "songs: %i\n", stats->numberOfSongs);
client_printf(client, "playtime: %li\n", stats->playTime);
}
static int
searchStatsInDirectory(struct song *song, void *data)
{
SearchStats *stats = data;
if (locate_song_match(song, stats->criteria)) {
stats->numberOfSongs++;
if (song->tag->time > 0)
stats->playTime += song->tag->time;
}
return 0;
}
int
searchStatsForSongsIn(struct client *client, const char *name,
const struct locate_item_list *criteria)
{
SearchStats stats;
int ret;
stats.criteria = criteria;
stats.numberOfSongs = 0;
stats.playTime = 0;
ret = db_walk(name, searchStatsInDirectory, NULL, &stats);
if (ret == 0)
printSearchStats(client, &stats);
return ret;
}
int printAllIn(struct client *client, const char *name)
{
return db_walk(name, printSongInDirectory,
printDirectoryInDirectory, client);
}
static int
directoryAddSongToPlaylist(struct song *song, G_GNUC_UNUSED void *data)
{
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return playlist_append_song(&g_playlist, song, NULL);
}
struct add_data {
const char *path;
};
static int
directoryAddSongToStoredPlaylist(struct song *song, void *_data)
{
struct add_data *data = _data;
if (spl_append_song(data->path, song) != 0)
return -1;
return 0;
}
int addAllIn(const char *name)
{
return db_walk(name, directoryAddSongToPlaylist, NULL, NULL);
}
int addAllInToStoredPlaylist(const char *name, const char *utf8file)
{
struct add_data data = {
.path = utf8file,
};
return db_walk(name, directoryAddSongToStoredPlaylist, NULL, &data);
}
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static int
findAddInDirectory(struct song *song, void *_data)
{
struct search_data *data = _data;
if (locate_song_match(song, data->criteria))
return directoryAddSongToPlaylist(song, data);
return 0;
}
int findAddIn(struct client *client, const char *name,
const struct locate_item_list *criteria)
{
struct search_data data;
data.client = client;
data.criteria = criteria;
return db_walk(name, findAddInDirectory, NULL, &data);
}
static int
directoryPrintSongInfo(struct song *song, void *data)
{
struct client *client = data;
song_print_info(client, song);
return 0;
}
int printInfoForAllIn(struct client *client, const char *name)
{
return db_walk(name, directoryPrintSongInfo,
printDirectoryInDirectory, client);
}
static ListCommandItem *
newListCommandItem(int tagType, const struct locate_item_list *criteria)
{
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ListCommandItem *item = g_new(ListCommandItem, 1);
item->tagType = tagType;
item->criteria = criteria;
return item;
}
static void freeListCommandItem(ListCommandItem * item)
{
g_free(item);
}
static void
visitTag(struct client *client, struct strset *set,
struct song *song, enum tag_type tagType)
{
struct tag *tag = song->tag;
if (tagType == LOCATE_TAG_FILE_TYPE) {
song_print_url(client, song);
return;
}
if (!tag)
return;
for (unsigned i = 0; i < tag->num_items; i++) {
if (tag->items[i]->type == tagType) {
strset_add(set, tag->items[i]->value);
return;
}
}
strset_add(set, "");
}
struct list_tags_data {
struct client *client;
ListCommandItem *item;
struct strset *set;
};
static int
listUniqueTagsInDirectory(struct song *song, void *_data)
{
struct list_tags_data *data = _data;
ListCommandItem *item = data->item;
if (locate_song_match(song, item->criteria))
visitTag(data->client, data->set, song, item->tagType);
return 0;
}
int listAllUniqueTags(struct client *client, int type,
const struct locate_item_list *criteria)
{
int ret;
ListCommandItem *item = newListCommandItem(type, criteria);
struct list_tags_data data = {
.client = client,
.item = item,
};
if (type >= 0 && type <= TAG_NUM_OF_ITEM_TYPES) {
data.set = strset_new();
}
ret = db_walk(NULL, listUniqueTagsInDirectory, NULL, &data);
if (type >= 0 && type <= TAG_NUM_OF_ITEM_TYPES) {
const char *value;
strset_rewind(data.set);
while ((value = strset_next(data.set)) != NULL)
client_printf(client, "%s: %s\n",
tag_item_names[type],
value);
strset_free(data.set);
}
freeListCommandItem(item);
return ret;
}