aboutsummaryrefslogtreecommitdiffstats
path: root/src/database.c
blob: d93066389781a1f521b50366f919fc13dd2c43b0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
 * Copyright (C) 2003-2011 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 "config.h"
#include "database.h"
#include "db_error.h"
#include "db_save.h"
#include "db_visitor.h"
#include "db_plugin.h"
#include "db/simple_db_plugin.h"
#include "directory.h"
#include "stats.h"
#include "conf.h"

#include <glib.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <errno.h>

#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "database"

static struct db *db;
static bool db_is_open;

bool
db_init(const struct config_param *path, GError **error_r)
{
	assert(db == NULL);
	assert(!db_is_open);

	if (path == NULL)
		return true;

	struct config_param *param = config_new_param("database", path->line);
	config_add_block_param(param, "path", path->value, path->line);

	db = db_plugin_new(&simple_db_plugin, param, error_r);

	config_param_free(param);

	return db != NULL;
}

void
db_finish(void)
{
	if (db_is_open)
		db_plugin_close(db);

	if (db != NULL)
		db_plugin_free(db);
}

struct directory *
db_get_root(void)
{
	assert(db != NULL);

	return simple_db_get_root(db);
}

struct directory *
db_get_directory(const char *name)
{
	if (db == NULL)
		return NULL;

	struct directory *music_root = db_get_root();
	if (name == NULL)
		return music_root;

	return directory_lookup_directory(music_root, name);
}

struct song *
db_get_song(const char *file)
{
	assert(file != NULL);

	g_debug("get song: %s", file);

	if (db == NULL)
		return NULL;

	struct directory *music_root = db_get_root();
	return directory_lookup_song(music_root, file);
}

bool
db_walk(const char *uri,
	const struct db_visitor *visitor, void *ctx,
	GError **error_r)
{
	struct directory *directory;

	if (db == NULL)
		return -1;

	if ((directory = db_get_directory(uri)) == NULL) {
		struct song *song;
		if (visitor->song != NULL &&
		    (song = db_get_song(uri)) != NULL)
			return visitor->song(song, ctx, error_r);

		g_set_error(error_r, db_quark(), DB_NOT_FOUND,
			    "No such directory: %s", uri);
		return false;
	}

	if (visitor->directory != NULL &&
	    !visitor->directory(directory, ctx, error_r))
		return false;

	return directory_walk(directory, visitor, ctx, error_r);
}

bool
db_save(GError **error_r)
{
	assert(db != NULL);
	assert(db_is_open);

	return simple_db_save(db, error_r);
}

bool
db_load(GError **error)
{
	assert(db != NULL);
	assert(!db_is_open);

	if (!db_plugin_open(db, error))
		return false;

	db_is_open = true;

	stats_update();

	return true;
}

time_t
db_get_mtime(void)
{
	assert(db != NULL);
	assert(db_is_open);

	return simple_db_get_mtime(db);
}