1 files changed, 139 insertions, 0 deletions
diff --git a/src/playlist_song.c b/src/playlist_song.c
new file mode 100644
index 000000000..fede0b3a1
--- /dev/null
+++ b/src/playlist_song.c
@@ -0,0 +1,139 @@
+/*
+ * 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_song.h"
+#include "database.h"
+#include "mapper.h"
+#include "song.h"
+#include "uri.h"
+#include "ls.h"
+#include "tag.h"
+
+#include <assert.h>
+#include <string.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;
+}
+
+struct song *
+playlist_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;
+}