1 files changed, 131 insertions, 0 deletions
diff --git a/src/playlist/PlaylistSong.cxx b/src/playlist/PlaylistSong.cxx
new file mode 100644
index 000000000..69f8762ab
--- /dev/null
+++ b/src/playlist/PlaylistSong.cxx
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2003-2014 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 "PlaylistSong.hxx"
+#include "Mapper.hxx"
+#include "db/DatabaseSong.hxx"
+#include "ls.hxx"
+#include "tag/Tag.hxx"
+#include "tag/TagBuilder.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "fs/Traits.hxx"
+#include "util/UriUtil.hxx"
+#include "util/Error.hxx"
+#include "DetachedSong.hxx"
+
+#include <assert.h>
+#include <string.h>
+
+static void
+merge_song_metadata(DetachedSong &add, const DetachedSong &base)
+{
+	{
+		TagBuilder builder(add.GetTag());
+		builder.Complement(base.GetTag());
+		add.SetTag(builder.Commit());
+	}
+
+	add.SetLastModified(base.GetLastModified());
+}
+
+static void
+apply_song_metadata(DetachedSong &dest, const DetachedSong &src)
+{
+	if (!src.GetTag().IsDefined() &&
+	    src.GetStartMS() == 0 && src.GetEndMS() == 0)
+		return;
+
+	merge_song_metadata(dest, src);
+
+	if (dest.GetTag().IsDefined() && dest.GetTag().time > 0 &&
+	    src.GetStartMS() > 0 && src.GetEndMS() == 0 &&
+	    src.GetStartMS() / 1000 < (unsigned)dest.GetTag().time)
+		/* the range is open-ended, and the playlist plugin
+		   did not know the total length of the song file
+		   (e.g. last track on a CUE file); fix it up here */
+		dest.WritableTag().time =
+			dest.GetTag().time - src.GetStartMS() / 1000;
+}
+
+static bool
+playlist_check_load_song(DetachedSong &song)
+{
+	const char *const uri = song.GetURI();
+
+	if (uri_has_scheme(uri)) {
+		return true;
+	} else if (PathTraitsUTF8::IsAbsolute(uri)) {
+		DetachedSong tmp(uri);
+		if (!tmp.Update())
+			return false;
+
+		apply_song_metadata(song, tmp);
+		return true;
+	} else {
+		DetachedSong *tmp = DatabaseDetachSong(uri, IgnoreError());
+		if (tmp == nullptr)
+			return false;
+
+		apply_song_metadata(song, *tmp);
+		delete tmp;
+		return true;
+	}
+}
+
+bool
+playlist_check_translate_song(DetachedSong &song, const char *base_uri,
+			      bool secure)
+{
+	const char *const uri = song.GetURI();
+
+	if (uri_has_scheme(uri))
+		/* valid remote song? */
+		return uri_supported_scheme(uri);
+
+	if (base_uri != nullptr && strcmp(base_uri, ".") == 0)
+		/* PathTraitsUTF8::GetParent() returns "." when there
+		   is no directory name in the given path; clear that
+		   now, because it would break the database lookup
+		   functions */
+		base_uri = nullptr;
+
+	if (PathTraitsUTF8::IsAbsolute(uri)) {
+		/* XXX fs_charset vs utf8? */
+		const char *suffix = map_to_relative_path(uri);
+		assert(suffix != nullptr);
+
+		if (suffix != uri)
+			song.SetURI(std::string(suffix));
+		else if (!secure)
+			/* local files must be relative to the music
+			   directory when "secure" is enabled */
+			return false;
+
+		base_uri = nullptr;
+	}
+
+	if (base_uri != nullptr) {
+		song.SetURI(PathTraitsUTF8::Build(base_uri, uri));
+		/* repeat the above checks */
+		return playlist_check_translate_song(song, nullptr, secure);
+	}
+
+	return playlist_check_load_song(song);
+}