1 files changed, 472 insertions, 0 deletions
diff --git a/src/PlaylistFile.cxx b/src/PlaylistFile.cxx
new file mode 100644
index 00000000..a879f70a
--- /dev/null
+++ b/src/PlaylistFile.cxx
@@ -0,0 +1,472 @@
+/*
+ * Copyright (C) 2003-2012 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 "PlaylistFile.hxx"
+#include "PlaylistSave.hxx"
+#include "PlaylistInfo.hxx"
+#include "PlaylistVector.hxx"
+#include "DatabasePlugin.hxx"
+#include "DatabaseGlue.hxx"
+#include "song.h"
+#include "io_error.h"
+#include "Mapper.hxx"
+#include "TextFile.hxx"
+#include "conf.h"
+#include "Idle.hxx"
+#include "fs/Path.hxx"
+#include "fs/FileSystem.hxx"
+
+extern "C" {
+#include "uri.h"
+}
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <string.h>
+#include <errno.h>
+
+static const char PLAYLIST_COMMENT = '#';
+
+static unsigned playlist_max_length;
+bool playlist_saveAbsolutePaths = DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS;
+
+void
+spl_global_init(void)
+{
+	playlist_max_length = config_get_positive(CONF_MAX_PLAYLIST_LENGTH,
+						  DEFAULT_PLAYLIST_MAX_LENGTH);
+
+	playlist_saveAbsolutePaths =
+		config_get_bool(CONF_SAVE_ABSOLUTE_PATHS,
+				DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS);
+}
+
+bool
+spl_valid_name(const char *name_utf8)
+{
+	/*
+	 * Not supporting '/' was done out of laziness, and we should
+	 * really strive to support it in the future.
+	 *
+	 * Not supporting '\r' and '\n' is done out of protocol
+	 * limitations (and arguably laziness), but bending over head
+	 * over heels to modify the protocol (and compatibility with
+	 * all clients) to support idiots who put '\r' and '\n' in
+	 * filenames isn't going to happen, either.
+	 */
+
+	return strchr(name_utf8, '/') == NULL &&
+		strchr(name_utf8, '\n') == NULL &&
+		strchr(name_utf8, '\r') == NULL;
+}
+
+static const char *
+spl_map(GError **error_r)
+{
+	const Path &path_fs = map_spl_path();
+	if (path_fs.IsNull())
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_DISABLED,
+				    "Stored playlists are disabled");
+
+	return path_fs.c_str();
+}
+
+static bool
+spl_check_name(const char *name_utf8, GError **error_r)
+{
+	if (!spl_valid_name(name_utf8)) {
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_BAD_NAME,
+				    "Bad playlist name");
+		return false;
+	}
+
+	return true;
+}
+
+static Path
+spl_map_to_fs(const char *name_utf8, GError **error_r)
+{
+	if (spl_map(error_r) == NULL ||
+	    !spl_check_name(name_utf8, error_r))
+		return Path::Null();
+
+	Path path_fs = map_spl_utf8_to_fs(name_utf8);
+	if (path_fs.IsNull())
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_BAD_NAME,
+				    "Bad playlist name");
+
+	return path_fs;
+}
+
+/**
+ * Create a GError for the current errno.
+ */
+static void
+playlist_errno(GError **error_r)
+{
+	switch (errno) {
+	case ENOENT:
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_NO_SUCH_LIST,
+				    "No such playlist");
+		break;
+
+	default:
+		set_error_errno(error_r);
+		break;
+	}
+}
+
+static bool
+LoadPlaylistFileInfo(PlaylistInfo &info,
+		     const char *parent_path_fs, const char *name_fs)
+{
+	size_t name_length = strlen(name_fs);
+
+	if (name_length < sizeof(PLAYLIST_FILE_SUFFIX) ||
+	    memchr(name_fs, '\n', name_length) != NULL)
+		return false;
+
+	if (!g_str_has_suffix(name_fs, PLAYLIST_FILE_SUFFIX))
+		return false;
+
+	char *path_fs = g_build_filename(parent_path_fs, name_fs, NULL);
+	struct stat st;
+	int ret = stat(path_fs, &st);
+	g_free(path_fs);
+	if (ret < 0 || !S_ISREG(st.st_mode))
+		return false;
+
+	char *name = g_strndup(name_fs,
+			       name_length + 1 - sizeof(PLAYLIST_FILE_SUFFIX));
+	std::string name_utf8 = Path::ToUTF8(name);
+	g_free(name);
+	if (name_utf8.empty())
+		return false;
+
+	info.name = std::move(name_utf8);
+	info.mtime = st.st_mtime;
+	return true;
+}
+
+PlaylistVector
+ListPlaylistFiles(GError **error_r)
+{
+	PlaylistVector list;
+
+	const char *parent_path_fs = spl_map(error_r);
+	if (parent_path_fs == NULL)
+		return list;
+
+	DIR *dir = opendir(parent_path_fs);
+	if (dir == NULL) {
+		set_error_errno(error_r);
+		return list;
+	}
+
+	PlaylistInfo info;
+	struct dirent *ent;
+	while ((ent = readdir(dir)) != NULL) {
+		if (LoadPlaylistFileInfo(info, parent_path_fs, ent->d_name))
+			list.push_back(std::move(info));
+	}
+
+	closedir(dir);
+	return list;
+}
+
+static bool
+SavePlaylistFile(const PlaylistFileContents &contents, const char *utf8path,
+		 GError **error_r)
+{
+	assert(utf8path != NULL);
+
+	if (spl_map(error_r) == NULL)
+		return false;
+
+	const Path path_fs = spl_map_to_fs(utf8path, error_r);
+	if (path_fs.IsNull())
+		return false;
+
+	FILE *file = FOpen(path_fs, FOpenMode::WriteText);
+	if (file == NULL) {
+		playlist_errno(error_r);
+		return false;
+	}
+
+	for (const auto &uri_utf8 : contents)
+		playlist_print_uri(file, uri_utf8.c_str());
+
+	fclose(file);
+	return true;
+}
+
+PlaylistFileContents
+LoadPlaylistFile(const char *utf8path, GError **error_r)
+{
+	PlaylistFileContents contents;
+
+	if (spl_map(error_r) == NULL)
+		return contents;
+
+	const Path path_fs = spl_map_to_fs(utf8path, error_r);
+	if (path_fs.IsNull())
+		return contents;
+
+	TextFile file(path_fs);
+	if (file.HasFailed()) {
+		playlist_errno(error_r);
+		return contents;
+	}
+
+	char *s;
+	while ((s = file.ReadLine()) != NULL) {
+		if (*s == 0 || *s == PLAYLIST_COMMENT)
+			continue;
+
+		if (!uri_has_scheme(s)) {
+			char *path_utf8;
+
+			path_utf8 = map_fs_to_utf8(s);
+			if (path_utf8 == NULL)
+				continue;
+
+			s = path_utf8;
+		} else
+			s = g_strdup(s);
+
+		contents.emplace_back(s);
+		if (contents.size() >= playlist_max_length)
+			break;
+	}
+
+	return contents;
+}
+
+bool
+spl_move_index(const char *utf8path, unsigned src, unsigned dest,
+	       GError **error_r)
+{
+	if (src == dest)
+		/* this doesn't check whether the playlist exists, but
+		   what the hell.. */
+		return true;
+
+	GError *error = nullptr;
+	auto contents = LoadPlaylistFile(utf8path, &error);
+	if (contents.empty() && error != nullptr) {
+		g_propagate_error(error_r, error);
+		return false;
+	}
+
+	if (src >= contents.size() || dest >= contents.size()) {
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_BAD_RANGE,
+				    "Bad range");
+		return false;
+	}
+
+	const auto src_i = std::next(contents.begin(), src);
+	auto value = std::move(*src_i);
+	contents.erase(src_i);
+
+	const auto dest_i = std::next(contents.begin(), dest);
+	contents.insert(dest_i, std::move(value));
+
+	bool result = SavePlaylistFile(contents, utf8path, error_r);
+
+	idle_add(IDLE_STORED_PLAYLIST);
+	return result;
+}
+
+bool
+spl_clear(const char *utf8path, GError **error_r)
+{
+	if (spl_map(error_r) == NULL)
+		return false;
+
+	const Path path_fs = spl_map_to_fs(utf8path, error_r);
+	if (path_fs.IsNull())
+		return false;
+
+	FILE *file = FOpen(path_fs, FOpenMode::WriteText);
+	if (file == NULL) {
+		playlist_errno(error_r);
+		return false;
+	}
+
+	fclose(file);
+
+	idle_add(IDLE_STORED_PLAYLIST);
+	return true;
+}
+
+bool
+spl_delete(const char *name_utf8, GError **error_r)
+{
+	const Path path_fs = spl_map_to_fs(name_utf8, error_r);
+	if (path_fs.IsNull())
+		return false;
+
+	if (!RemoveFile(path_fs)) {
+		playlist_errno(error_r);
+		return false;
+	}
+
+	idle_add(IDLE_STORED_PLAYLIST);
+	return true;
+}
+
+bool
+spl_remove_index(const char *utf8path, unsigned pos, GError **error_r)
+{
+	GError *error = nullptr;
+	auto contents = LoadPlaylistFile(utf8path, &error);
+	if (contents.empty() && error != nullptr) {
+		g_propagate_error(error_r, error);
+		return false;
+	}
+
+	if (pos >= contents.size()) {
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_BAD_RANGE,
+				    "Bad range");
+		return false;
+	}
+
+	contents.erase(std::next(contents.begin(), pos));
+
+	bool result = SavePlaylistFile(contents, utf8path, error_r);
+
+	idle_add(IDLE_STORED_PLAYLIST);
+	return result;
+}
+
+bool
+spl_append_song(const char *utf8path, struct song *song, GError **error_r)
+{
+	if (spl_map(error_r) == NULL)
+		return false;
+
+	const Path path_fs = spl_map_to_fs(utf8path, error_r);
+	if (path_fs.IsNull())
+		return false;
+
+	FILE *file = FOpen(path_fs, FOpenMode::AppendText);
+	if (file == NULL) {
+		playlist_errno(error_r);
+		return false;
+	}
+
+	struct stat st;
+	if (fstat(fileno(file), &st) < 0) {
+		playlist_errno(error_r);
+		fclose(file);
+		return false;
+	}
+
+	if (st.st_size / (MPD_PATH_MAX + 1) >= (off_t)playlist_max_length) {
+		fclose(file);
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_TOO_LARGE,
+				    "Stored playlist is too large");
+		return false;
+	}
+
+	playlist_print_song(file, song);
+
+	fclose(file);
+
+	idle_add(IDLE_STORED_PLAYLIST);
+	return true;
+}
+
+bool
+spl_append_uri(const char *url, const char *utf8file, GError **error_r)
+{
+	if (uri_has_scheme(url)) {
+		struct song *song = song_remote_new(url);
+		bool success = spl_append_song(utf8file, song, error_r);
+		song_free(song);
+		return success;
+	} else {
+		const Database *db = GetDatabase(error_r);
+		if (db == nullptr)
+			return false;
+
+		song *song = db->GetSong(url, error_r);
+		if (song == nullptr)
+			return false;
+
+		bool success = spl_append_song(utf8file, song, error_r);
+		db->ReturnSong(song);
+		return success;
+	}
+}
+
+static bool
+spl_rename_internal(const Path &from_path_fs, const Path &to_path_fs,
+		    GError **error_r)
+{
+	if (!FileExists(from_path_fs)) {
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_NO_SUCH_LIST,
+				    "No such playlist");
+		return false;
+	}
+
+	if (FileExists(to_path_fs)) {
+		g_set_error_literal(error_r, playlist_quark(),
+				    PLAYLIST_RESULT_LIST_EXISTS,
+				    "Playlist exists already");
+		return false;
+	}
+
+	if (!RenameFile(from_path_fs, to_path_fs)) {
+		playlist_errno(error_r);
+		return false;
+	}
+
+	idle_add(IDLE_STORED_PLAYLIST);
+	return true;
+}
+
+bool
+spl_rename(const char *utf8from, const char *utf8to, GError **error_r)
+{
+	if (spl_map(error_r) == NULL)
+		return false;
+
+	Path from_path_fs = spl_map_to_fs(utf8from, error_r);
+	if (from_path_fs.IsNull())
+		return false;
+
+	Path to_path_fs = spl_map_to_fs(utf8to, error_r);
+	if (to_path_fs.IsNull())
+		return false;
+
+	return spl_rename_internal(from_path_fs, to_path_fs, error_r);
+}