1 files changed, 293 insertions, 0 deletions
diff --git a/src/playlist_queue.c b/src/playlist_queue.c
new file mode 100644
index 000000000..9940c3323
--- /dev/null
+++ b/src/playlist_queue.c
@@ -0,0 +1,293 @@
+/*
+ * Copyright (C) 2003-2010 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_queue.h"
+#include "playlist_list.h"
+#include "playlist_plugin.h"
+#include "stored_playlist.h"
+#include "database.h"
+#include "mapper.h"
+#include "song.h"
+#include "tag.h"
+#include "uri.h"
+#include "ls.h"
+#include "input_stream.h"
+
+static void
+merge_song_metadata(struct song *dest, const struct song *base,
+		    const struct song *add)
+{
+	dest->tag = base->tag != NULL
+		? (add->tag != NULL
+		   ? tag_merge(base->tag, add->tag)
+		   : tag_dup(base->tag))
+		: (add->tag != NULL
+		   ? tag_dup(add->tag)
+		   : NULL);
+
+	dest->mtime = base->mtime;
+	dest->start_ms = add->start_ms;
+	dest->end_ms = add->end_ms;
+}
+
+static struct song *
+apply_song_metadata(struct song *dest, const struct song *src)
+{
+	struct song *tmp;
+
+	assert(dest != NULL);
+	assert(src != NULL);
+
+	if (src->tag == NULL && src->start_ms == 0 && src->end_ms == 0)
+		return dest;
+
+	if (song_in_database(dest)) {
+		char *path_fs = map_song_fs(dest);
+		if (path_fs == NULL)
+			return dest;
+
+		tmp = song_file_new(path_fs, NULL);
+		merge_song_metadata(tmp, dest, src);
+	} else {
+		tmp = song_file_new(dest->uri, NULL);
+		merge_song_metadata(tmp, dest, src);
+		song_free(dest);
+	}
+
+	return tmp;
+}
+
+/**
+ * Verifies the song, returns NULL if it is unsafe.  Translate the
+ * song to a new song object within the database, if it is a local
+ * file.  The old song object is freed.
+ */
+static struct song *
+check_translate_song(struct song *song, const char *base_uri)
+{
+	struct song *dest;
+
+	if (song_in_database(song))
+		/* already ok */
+		return song;
+
+	char *uri = song->uri;
+
+	if (uri_has_scheme(uri)) {
+		if (uri_supported_scheme(uri))
+			/* valid remote song */
+			return song;
+		else {
+			/* unsupported remote song */
+			song_free(song);
+			return NULL;
+		}
+	}
+
+	if (g_path_is_absolute(uri)) {
+		/* XXX fs_charset vs utf8? */
+		char *prefix = base_uri != NULL
+			? map_uri_fs(base_uri)
+			: map_directory_fs(db_get_root());
+
+		if (prefix == NULL || !g_str_has_prefix(uri, prefix) ||
+		    uri[strlen(prefix)] != '/') {
+			/* local files must be relative to the music
+			   directory */
+			g_free(prefix);
+			song_free(song);
+			return NULL;
+		}
+
+		uri += strlen(prefix) + 1;
+		g_free(prefix);
+	}
+
+	if (base_uri != NULL)
+		uri = g_build_filename(base_uri, uri, NULL);
+	else
+		uri = g_strdup(uri);
+
+	if (uri_has_scheme(base_uri)) {
+		dest = song_remote_new(uri);
+		g_free(uri);
+	} else {
+		dest = db_get_song(uri);
+		g_free(uri);
+		if (dest == NULL) {
+			/* not found in database */
+			song_free(song);
+			return dest;
+		}
+	}
+
+	dest = apply_song_metadata(dest, song);
+	song_free(song);
+
+	return dest;
+}
+
+enum playlist_result
+playlist_load_into_queue(const char *uri, struct playlist_provider *source,
+			 struct playlist *dest)
+{
+	enum playlist_result result;
+	struct song *song;
+	char *base_uri = uri != NULL ? g_path_get_dirname(uri) : NULL;
+
+	while ((song = playlist_plugin_read(source)) != NULL) {
+		song = check_translate_song(song, base_uri);
+		if (song == NULL)
+			continue;
+
+		result = playlist_append_song(dest, song, NULL);
+		if (result != PLAYLIST_RESULT_SUCCESS) {
+			if (!song_in_database(song))
+				song_free(song);
+			g_free(base_uri);
+			return result;
+		}
+	}
+
+	g_free(base_uri);
+
+	return PLAYLIST_RESULT_SUCCESS;
+}
+
+static enum playlist_result
+playlist_open_remote_into_queue(const char *uri, struct playlist *dest)
+{
+	GError *error = NULL;
+	struct playlist_provider *playlist;
+	struct input_stream *is = NULL;
+	enum playlist_result result;
+
+	assert(uri_has_scheme(uri));
+
+	playlist = playlist_list_open_uri(uri);
+	if (playlist == NULL) {
+		is = input_stream_open(uri, &error);
+		if (is == NULL) {
+			if (error != NULL) {
+				g_warning("Failed to open %s: %s",
+					  uri, error->message);
+				g_error_free(error);
+			}
+
+			return PLAYLIST_RESULT_NO_SUCH_LIST;
+		}
+
+		playlist = playlist_list_open_stream(is, uri);
+		if (playlist == NULL) {
+			input_stream_close(is);
+			return PLAYLIST_RESULT_NO_SUCH_LIST;
+		}
+	}
+
+	result = playlist_load_into_queue(uri, playlist, dest);
+	playlist_plugin_close(playlist);
+
+	if (is != NULL)
+		input_stream_close(is);
+
+	return result;
+}
+
+static enum playlist_result
+playlist_open_path_into_queue(const char *path_fs, const char *uri,
+			      struct playlist *dest)
+{
+	struct playlist_provider *playlist;
+	enum playlist_result result;
+
+	if ((playlist = playlist_list_open_uri(path_fs)) != NULL)
+		result = playlist_load_into_queue(uri, playlist, dest);
+	else if ((playlist = playlist_list_open_path(path_fs)) != NULL)
+		result = playlist_load_into_queue(uri, playlist, dest);
+	else
+		return PLAYLIST_RESULT_NO_SUCH_LIST;
+
+	playlist_plugin_close(playlist);
+
+	return result;
+}
+
+/**
+ * Load a playlist from the configured playlist directory.
+ */
+static enum playlist_result
+playlist_open_local_into_queue(const char *uri, struct playlist *dest)
+{
+	const char *playlist_directory_fs;
+	char *path_fs;
+	enum playlist_result result;
+
+	assert(spl_valid_name(uri));
+
+	playlist_directory_fs = map_spl_path();
+	if (playlist_directory_fs == NULL)
+		return PLAYLIST_RESULT_DISABLED;
+
+	path_fs = g_build_filename(playlist_directory_fs, uri, NULL);
+	result = playlist_open_path_into_queue(path_fs, NULL, dest);
+	g_free(path_fs);
+
+	return result;
+}
+
+/**
+ * Load a playlist from the configured music directory.
+ */
+static enum playlist_result
+playlist_open_local_into_queue2(const char *uri, struct playlist *dest)
+{
+	char *path_fs;
+	enum playlist_result result;
+
+	assert(uri_safe_local(uri));
+
+	path_fs = map_uri_fs(uri);
+	if (path_fs == NULL)
+		return PLAYLIST_RESULT_NO_SUCH_LIST;
+
+	result = playlist_open_path_into_queue(path_fs, uri, dest);
+	g_free(path_fs);
+
+	return result;
+}
+
+enum playlist_result
+playlist_open_into_queue(const char *uri, struct playlist *dest)
+{
+	if (uri_has_scheme(uri))
+		return playlist_open_remote_into_queue(uri, dest);
+
+	if (spl_valid_name(uri)) {
+		enum playlist_result result =
+			playlist_open_local_into_queue(uri, dest);
+		if (result != PLAYLIST_RESULT_NO_SUCH_LIST)
+			return result;
+	}
+
+	if (uri_safe_local(uri))
+		return playlist_open_local_into_queue2(uri, dest);
+
+	return PLAYLIST_RESULT_NO_SUCH_LIST;
+}