1 files changed, 332 insertions, 0 deletions
diff --git a/src/playlist_list.c b/src/playlist_list.c
new file mode 100644
index 000000000..e0013b619
--- /dev/null
+++ b/src/playlist_list.c
@@ -0,0 +1,332 @@
+/*
+ * 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 "config.h"
+#include "playlist_list.h"
+#include "playlist_plugin.h"
+#include "playlist/extm3u_playlist_plugin.h"
+#include "playlist/m3u_playlist_plugin.h"
+#include "playlist/xspf_playlist_plugin.h"
+#include "playlist/lastfm_playlist_plugin.h"
+#include "playlist/pls_playlist_plugin.h"
+#include "playlist/asx_playlist_plugin.h"
+#include "playlist/cue_playlist_plugin.h"
+#include "input_stream.h"
+#include "uri.h"
+#include "utils.h"
+#include "conf.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+
+static const struct playlist_plugin *const playlist_plugins[] = {
+	&extm3u_playlist_plugin,
+	&m3u_playlist_plugin,
+	&xspf_playlist_plugin,
+	&pls_playlist_plugin,
+	&asx_playlist_plugin,
+#ifdef ENABLE_LASTFM
+	&lastfm_playlist_plugin,
+#endif
+#ifdef HAVE_CUE
+	&cue_playlist_plugin,
+#endif
+	NULL
+};
+
+/** which plugins have been initialized successfully? */
+static bool playlist_plugins_enabled[G_N_ELEMENTS(playlist_plugins)];
+
+/**
+ * Find the "playlist" configuration block for the specified plugin.
+ *
+ * @param plugin_name the name of the playlist plugin
+ * @return the configuration block, or NULL if none was configured
+ */
+static const struct config_param *
+playlist_plugin_config(const char *plugin_name)
+{
+	const struct config_param *param = NULL;
+
+	assert(plugin_name != NULL);
+
+	while ((param = config_get_next_param(CONF_PLAYLIST_PLUGIN, param)) != NULL) {
+		const char *name =
+			config_get_block_string(param, "name", NULL);
+		if (name == NULL)
+			g_error("playlist configuration without 'plugin' name in line %d",
+				param->line);
+
+		if (strcmp(name, plugin_name) == 0)
+			return param;
+	}
+
+	return NULL;
+}
+
+void
+playlist_list_global_init(void)
+{
+	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
+		const struct playlist_plugin *plugin = playlist_plugins[i];
+		const struct config_param *param =
+			playlist_plugin_config(plugin->name);
+
+		if (!config_get_block_bool(param, "enabled", true))
+			/* the plugin is disabled in mpd.conf */
+			continue;
+
+		playlist_plugins_enabled[i] =
+			playlist_plugin_init(playlist_plugins[i], param);
+	}
+}
+
+void
+playlist_list_global_finish(void)
+{
+	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i)
+		if (playlist_plugins_enabled[i])
+			playlist_plugin_finish(playlist_plugins[i]);
+}
+
+/* g_uri_parse_scheme() was introduced in GLib 2.16 */
+#if !GLIB_CHECK_VERSION(2,16,0)
+static char *
+g_uri_parse_scheme(const char *uri)
+{
+	const char *end = strstr(uri, "://");
+	if (end == NULL)
+		return NULL;
+	return g_strndup(uri, end - uri);
+}
+#endif
+
+static struct playlist_provider *
+playlist_list_open_uri_scheme(const char *uri, bool *tried)
+{
+	char *scheme;
+	struct playlist_provider *playlist = NULL;
+
+	assert(uri != NULL);
+
+	scheme = g_uri_parse_scheme(uri);
+	if (scheme == NULL)
+		return NULL;
+
+	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
+		const struct playlist_plugin *plugin = playlist_plugins[i];
+
+		assert(!tried[i]);
+
+		if (playlist_plugins_enabled[i] && plugin->open_uri != NULL &&
+		    plugin->schemes != NULL &&
+		    string_array_contains(plugin->schemes, scheme)) {
+			playlist = playlist_plugin_open_uri(plugin, uri);
+			if (playlist != NULL)
+				break;
+
+			tried[i] = true;
+		}
+	}
+
+	g_free(scheme);
+	return playlist;
+}
+
+static struct playlist_provider *
+playlist_list_open_uri_suffix(const char *uri, const bool *tried)
+{
+	const char *suffix;
+	struct playlist_provider *playlist = NULL;
+
+	assert(uri != NULL);
+
+	suffix = uri_get_suffix(uri);
+	if (suffix == NULL)
+		return NULL;
+
+	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
+		const struct playlist_plugin *plugin = playlist_plugins[i];
+
+		if (playlist_plugins_enabled[i] && !tried[i] &&
+		    plugin->open_uri != NULL && plugin->suffixes != NULL &&
+		    string_array_contains(plugin->suffixes, suffix)) {
+			playlist = playlist_plugin_open_uri(plugin, uri);
+			if (playlist != NULL)
+				break;
+		}
+	}
+
+	return playlist;
+}
+
+struct playlist_provider *
+playlist_list_open_uri(const char *uri)
+{
+	struct playlist_provider *playlist;
+	/** this array tracks which plugins have already been tried by
+	    playlist_list_open_uri_scheme() */
+	bool tried[G_N_ELEMENTS(playlist_plugins) - 1];
+
+	assert(uri != NULL);
+
+	memset(tried, false, sizeof(tried));
+
+	playlist = playlist_list_open_uri_scheme(uri, tried);
+	if (playlist == NULL)
+		playlist = playlist_list_open_uri_suffix(uri, tried);
+
+	return playlist;
+}
+
+static struct playlist_provider *
+playlist_list_open_stream_mime(struct input_stream *is)
+{
+	struct playlist_provider *playlist;
+
+	assert(is != NULL);
+	assert(is->mime != NULL);
+
+	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
+		const struct playlist_plugin *plugin = playlist_plugins[i];
+
+		if (playlist_plugins_enabled[i] &&
+		    plugin->open_stream != NULL &&
+		    plugin->mime_types != NULL &&
+		    string_array_contains(plugin->mime_types, is->mime)) {
+			/* rewind the stream, so each plugin gets a
+			   fresh start */
+			input_stream_seek(is, 0, SEEK_SET, NULL);
+
+			playlist = playlist_plugin_open_stream(plugin, is);
+			if (playlist != NULL)
+				return playlist;
+		}
+	}
+
+	return NULL;
+}
+
+static struct playlist_provider *
+playlist_list_open_stream_suffix(struct input_stream *is, const char *suffix)
+{
+	struct playlist_provider *playlist;
+
+	assert(is != NULL);
+	assert(suffix != NULL);
+
+	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
+		const struct playlist_plugin *plugin = playlist_plugins[i];
+
+		if (playlist_plugins_enabled[i] &&
+		    plugin->open_stream != NULL &&
+		    plugin->suffixes != NULL &&
+		    string_array_contains(plugin->suffixes, suffix)) {
+			/* rewind the stream, so each plugin gets a
+			   fresh start */
+			input_stream_seek(is, 0, SEEK_SET, NULL);
+
+			playlist = playlist_plugin_open_stream(plugin, is);
+			if (playlist != NULL)
+				return playlist;
+		}
+	}
+
+	return NULL;
+}
+
+struct playlist_provider *
+playlist_list_open_stream(struct input_stream *is, const char *uri)
+{
+	const char *suffix;
+	struct playlist_provider *playlist;
+
+	if (is->mime != NULL) {
+		playlist = playlist_list_open_stream_mime(is);
+		if (playlist != NULL)
+			return playlist;
+	}
+
+	suffix = uri != NULL ? uri_get_suffix(uri) : NULL;
+	if (suffix != NULL) {
+		playlist = playlist_list_open_stream_suffix(is, suffix);
+		if (playlist != NULL)
+			return playlist;
+	}
+
+	return NULL;
+}
+
+static bool
+playlist_suffix_supported(const char *suffix)
+{
+	assert(suffix != NULL);
+
+	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
+		const struct playlist_plugin *plugin = playlist_plugins[i];
+
+		if (playlist_plugins_enabled[i] && plugin->suffixes != NULL &&
+		    string_array_contains(plugin->suffixes, suffix))
+			return true;
+	}
+
+	return false;
+}
+
+struct playlist_provider *
+playlist_list_open_path(struct input_stream *is, const char *path_fs)
+{
+	GError *error = NULL;
+	const char *suffix;
+	struct playlist_provider *playlist;
+
+	assert(path_fs != NULL);
+
+	suffix = uri_get_suffix(path_fs);
+	if (suffix == NULL || !playlist_suffix_supported(suffix))
+		return NULL;
+
+	if (!input_stream_open(is, path_fs, &error)) {
+		if (error != NULL) {
+			g_warning("%s", error->message);
+			g_error_free(error);
+		}
+
+		return NULL;
+	}
+
+	while (!is->ready) {
+		int ret = input_stream_buffer(is, &error);
+		if (ret < 0) {
+			input_stream_close(is);
+			g_warning("%s", error->message);
+			g_error_free(error);
+			return NULL;
+		}
+	}
+
+	playlist = playlist_list_open_stream_suffix(is, suffix);
+	if (playlist == NULL)
+		input_stream_close(is);
+
+	return playlist;
+}