queue/PlaylistEdit: throw PlaylistError on error

src/command/PlaylistCommands.cxx

@@ -66,7 +66,7 @@ handle_save(Client &client, Request args, gcc_unused Response &r)
 }
 
 CommandResult
-handle_load(Client &client, Request args, Response &r)
+handle_load(Client &client, Request args, gcc_unused Response &r)
 {
 	RangeArg range = args.ParseOptional(1, RangeArg::All());
 
@@ -74,12 +74,10 @@ handle_load(Client &client, Request args, Response &r)
 
 	Error error;
 	const SongLoader loader(client);
-	if (!playlist_open_into_queue(args.front(),
-				      range.start, range.end,
-				      client.playlist,
-				      client.player_control, loader, error))
-		return print_error(r, error);
-
+	playlist_open_into_queue(args.front(),
+				 range.start, range.end,
+				 client.playlist,
+				 client.player_control, loader);
 	return CommandResult::OK;
 }
 

src/command/QueueCommands.cxx

@@ -54,11 +54,7 @@ AddUri(Client &client, const LocatedUri &uri, Response &r)
 		return print_error(r, error);
 
 	auto &partition = client.partition;
-	unsigned id = partition.playlist.AppendSong(partition.pc,
-						    std::move(*song), error);
-	if (id == 0)
-		return print_error(r, error);
-
+	partition.playlist.AppendSong(partition.pc, std::move(*song));
 	return CommandResult::OK;
 }
 
@@ -186,12 +182,8 @@ handle_rangeid(Client &client, Request args, Response &r)
 		return CommandResult::ERROR;
 	}
 
-	Error error;
-	if (!client.partition.playlist.SetSongIdRange(client.partition.pc,
-						      id, start, end,
-						      error))
-		return print_error(r, error);
-
+	client.partition.playlist.SetSongIdRange(client.partition.pc,
+						 id, start, end);
 	return CommandResult::OK;
 }
 

src/db/DatabaseQueue.cxx

@@ -28,15 +28,13 @@
 #include <functional>
 
 static bool
-AddToQueue(Partition &partition, const LightSong &song, Error &error)
+AddToQueue(Partition &partition, const LightSong &song)
 {
 	const Storage &storage = *partition.instance.storage;
-	unsigned id =
-		partition.playlist.AppendSong(partition.pc,
-					      DatabaseDetachSong(storage,
-								 song),
-					      error);
-	return id != 0;
+	partition.playlist.AppendSong(partition.pc,
+				      DatabaseDetachSong(storage,
+							 song));
+	return true;
 }
 
 bool
@@ -48,6 +46,6 @@ AddFromDatabase(Partition &partition, const DatabaseSelection &selection,
 		return false;
 
 	using namespace std::placeholders;
-	const auto f = std::bind(AddToQueue, std::ref(partition), _1, _2);
+	const auto f = std::bind(AddToQueue, std::ref(partition), _1);
 	return db->Visit(selection, f, error);
 }

src/playlist/PlaylistQueue.cxx

@@ -35,12 +35,11 @@
 
 #include <memory>
 
-bool
+void
 playlist_load_into_queue(const char *uri, SongEnumerator &e,
 			 unsigned start_index, unsigned end_index,
 			 playlist &dest, PlayerControl &pc,
-			 const SongLoader &loader,
-			 Error &error)
+			 const SongLoader &loader)
 {
 	const std::string base_uri = uri != nullptr
 		? PathTraitsUTF8::GetParent(uri)
@@ -60,20 +59,15 @@ playlist_load_into_queue(const char *uri, SongEnumerator &e,
 			continue;
 		}
 
-		unsigned id = dest.AppendSong(pc, std::move(*song), error);
-		if (id == 0)
-			return false;
+		dest.AppendSong(pc, std::move(*song));
 	}
-
-	return true;
 }
 
-bool
+void
 playlist_open_into_queue(const char *uri,
 			 unsigned start_index, unsigned end_index,
 			 playlist &dest, PlayerControl &pc,
-			 const SongLoader &loader,
-			 Error &error)
+			 const SongLoader &loader)
 {
 	Mutex mutex;
 	Cond cond;
@@ -83,13 +77,10 @@ playlist_open_into_queue(const char *uri,
 								   loader.GetStorage(),
 #endif
 								   mutex, cond));
-	if (playlist == nullptr) {
-		error.Set(playlist_domain, int(PlaylistResult::NO_SUCH_LIST),
-			  "No such playlist");
-		return false;
-	}
+	if (playlist == nullptr)
+		throw PlaylistError::NoSuchList();
 
-	return playlist_load_into_queue(uri, *playlist,
-					start_index, end_index,
-					dest, pc, loader, error);
+	playlist_load_into_queue(uri, *playlist,
+				 start_index, end_index,
+				 dest, pc, loader);
 }

src/playlist/PlaylistQueue.hxx

@@ -41,22 +41,21 @@ struct PlayerControl;
  * @param start_index the index of the first song
  * @param end_index the index of the last song (excluding)
  */
-bool
+void
 playlist_load_into_queue(const char *uri, SongEnumerator &e,
 			 unsigned start_index, unsigned end_index,
 			 playlist &dest, PlayerControl &pc,
-			 const SongLoader &loader,
-			 Error &error);
+			 const SongLoader &loader);
 
 /**
  * Opens a playlist with a playlist plugin and append to the specified
  * play queue.
  */
-bool
+void
 playlist_open_into_queue(const char *uri,
 			 unsigned start_index, unsigned end_index,
 			 playlist &dest, PlayerControl &pc,
-			 const SongLoader &loader, Error &error);
+			 const SongLoader &loader);
 
 #endif
 

src/queue/Playlist.hxx

@@ -195,11 +195,11 @@ public:
 #endif
 
 	/**
-	 * @return the new song id or 0 on error
+	 * Throws PlaylistError if the queue would be too large.
+	 *
+	 * @return the new song id
 	 */
-	unsigned AppendSong(PlayerControl &pc,
-			    DetachedSong &&song,
-			    Error &error);
+	unsigned AppendSong(PlayerControl &pc, DetachedSong &&song);
 
 	/**
 	 * @return the new song id or 0 on error
@@ -254,9 +254,8 @@ public:
 	 * Sets the start_time and end_time attributes on the song
 	 * with the specified id.
 	 */
-	bool SetSongIdRange(PlayerControl &pc, unsigned id,
-			    SongTime start, SongTime end,
-			    Error &error);
+	void SetSongIdRange(PlayerControl &pc, unsigned id,
+			    SongTime start, SongTime end);
 
 	void AddSongIdTag(unsigned id, TagType tag_type, const char *value);
 	void ClearSongIdTag(unsigned id, TagType tag_type);

src/queue/PlaylistEdit.cxx

@@ -92,15 +92,13 @@ playlist::CommitBulk(PlayerControl &pc)
 }
 
 unsigned
-playlist::AppendSong(PlayerControl &pc, DetachedSong &&song, Error &error)
+playlist::AppendSong(PlayerControl &pc, DetachedSong &&song)
 {
 	unsigned id;
 
-	if (queue.IsFull()) {
-		error.Set(playlist_domain, int(PlaylistResult::TOO_LARGE),
-			  "Playlist is too large");
-		return 0;
-	}
+	if (queue.IsFull())
+		throw PlaylistError(PlaylistResult::TOO_LARGE,
+				    "Playlist is too large");
 
 	const DetachedSong *const queued_song = GetQueuedSong();
 
@@ -134,7 +132,7 @@ playlist::AppendURI(PlayerControl &pc, const SongLoader &loader,
 	if (song == nullptr)
 		return 0;
 
-	return AppendSong(pc, std::move(*song), error);
+	return AppendSong(pc, std::move(*song));
 }
 
 void
@@ -419,26 +417,20 @@ playlist::Shuffle(PlayerControl &pc, unsigned start, unsigned end)
 	OnModified();
 }
 
-bool
+void
 playlist::SetSongIdRange(PlayerControl &pc, unsigned id,
-			 SongTime start, SongTime end,
-			 Error &error)
+			 SongTime start, SongTime end)
 {
 	assert(end.IsZero() || start < end);
 
 	int position = queue.IdToPosition(id);
-	if (position < 0) {
-		error.Set(playlist_domain, int(PlaylistResult::NO_SUCH_SONG),
-			  "No such song");
-		return false;
-	}
+	if (position < 0)
+		throw PlaylistError::NoSuchSong();
 
 	if (playing) {
-		if (position == current) {
-			error.Set(playlist_domain, int(PlaylistResult::DENIED),
-				  "Cannot edit the current song");
-			return false;
-		}
+		if (position == current)
+			throw PlaylistError(PlaylistResult::DENIED,
+					    "Cannot edit the current song");
 
 		if (position == queued) {
 			/* if we're manipulating the "queued" song,
@@ -455,12 +447,9 @@ playlist::SetSongIdRange(PlayerControl &pc, unsigned id,
 	if (!duration.IsNegative()) {
 		/* validate the offsets */
 
-		if (start > duration) {
-			error.Set(playlist_domain,
-				  int(PlaylistResult::BAD_RANGE),
-				  "Invalid start offset");
-			return false;
-		}
+		if (start > duration)
+			throw PlaylistError(PlaylistResult::BAD_RANGE,
+					    "Invalid start offset");
 
 		if (end >= duration)
 			end = SongTime::zero();
@@ -474,5 +463,4 @@ playlist::SetSongIdRange(PlayerControl &pc, unsigned id,
 	UpdateQueuedSong(pc, nullptr);
 	queue.ModifyAtPosition(position);
 	OnModified();
-	return true;
 }