mpd/src/Instance.cxx

// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright The Music Player Daemon Project

#include "config.h"
#include "Instance.hxx"
#include "Partition.hxx"
#include "protocol/IdleFlags.hxx"
#include "StateFile.hxx"
#include "Stats.hxx"
#include "client/List.hxx"
#include "input/cache/Manager.hxx"

#ifdef ENABLE_CURL
#include "RemoteTagCache.hxx"
#include "util/UriExtract.hxx"
#endif

#ifdef ENABLE_DATABASE
#include "db/DatabaseError.hxx"
#include "db/Interface.hxx"
#include "db/update/Service.hxx"
#include "storage/StorageInterface.hxx"

#ifdef ENABLE_INOTIFY
#include "db/update/InotifyUpdate.hxx"
#endif

#ifdef ENABLE_NEIGHBOR_PLUGINS
#include "neighbor/Glue.hxx"
#endif

#ifdef ENABLE_SQLITE
#include "sticker/Database.hxx"
#include "sticker/SongSticker.hxx"
#include "sticker/TagSticker.hxx"
#include "sticker/CleanupService.hxx"
#endif

#endif

Instance::Instance() = default;

Instance::~Instance() noexcept
{
#ifdef ENABLE_SQLITE
	if (sticker_cleanup)
		sticker_cleanup.reset();
#endif

#ifdef ENABLE_DATABASE
	delete update;

	if (database != nullptr) {
		database->Close();
		database.reset();
	}

	delete storage;
#endif
}

void
Instance::OnStateModified() noexcept
{
	if (state_file)
		state_file->CheckModified();
}

Partition *
Instance::FindPartition(const char *name) noexcept
{
	for (auto &partition : partitions)
		if (partition.name == name)
			return &partition;

	return nullptr;
}

void
Instance::DeletePartition(Partition &partition) noexcept
{
	// TODO: use boost::intrusive::list to avoid this loop
	for (auto i = partitions.begin();; ++i) {
		assert(i != partitions.end());

		if (&*i == &partition) {
			partitions.erase(i);
			break;
		}
	}
}

AudioOutputControl *
Instance::FindOutput(std::string_view name,
		     Partition &excluding_partition) noexcept
{
	for (auto &partition : partitions) {
		if (&partition == &excluding_partition)
			continue;

		auto *output = partition.outputs.FindByName(name);
		if (output != nullptr && !output->IsDummy())
			return output;
	}

	return nullptr;
}

#ifdef ENABLE_DATABASE

const Database &
Instance::GetDatabaseOrThrow() const
{
	if (database == nullptr)
		throw DatabaseError(DatabaseErrorCode::DISABLED,
				    "No database");

	return *database;
}

void
Instance::OnDatabaseModified() noexcept
{
	assert(database != nullptr);

	/* propagate the change to all subsystems */

	stats_invalidate();

	for (auto &partition : partitions)
		partition.DatabaseModified(*database);

#ifdef ENABLE_SQLITE
	if (sticker_database)
		StartStickerCleanup();
#endif
}

void
Instance::OnDatabaseSongRemoved(const char *uri) noexcept
{
	assert(database != nullptr);

#ifdef ENABLE_SQLITE
	/* if the song has a sticker, remove it */
	if (HasStickerDatabase()) {
		try {
			sticker_song_delete(*sticker_database, uri);
		} catch (...) {
		}
	}
#endif

	for (auto &partition : partitions)
		partition.StaleSong(uri);
}

#endif

#ifdef ENABLE_NEIGHBOR_PLUGINS

void
Instance::FoundNeighbor([[maybe_unused]] const NeighborInfo &info) noexcept
{
	EmitIdle(IDLE_NEIGHBOR);
}

void
Instance::LostNeighbor([[maybe_unused]] const NeighborInfo &info) noexcept
{
	EmitIdle(IDLE_NEIGHBOR);
}

#endif

#ifdef ENABLE_CURL

void
Instance::LookupRemoteTag(const char *uri) noexcept
{
	if (!uri_has_scheme(uri))
		return;

	if (!remote_tag_cache)
		remote_tag_cache = std::make_unique<RemoteTagCache>(event_loop,
								    *this);

	remote_tag_cache->Lookup(uri);
}

void
Instance::OnRemoteTag(const char *uri, const Tag &tag) noexcept
{
	if (!tag.IsDefined())
		/* boring */
		return;

	for (auto &partition : partitions)
		partition.TagModified(uri, tag);
}

#endif

void
Instance::OnIdle(unsigned flags) noexcept
{
	/* broadcast to all partitions */
	for (auto &partition : partitions)
		partition.EmitIdle(flags);
}

void
Instance::FlushCaches() noexcept
{
	if (input_cache)
		input_cache->Flush();
}

void
Instance::OnPlaylistDeleted(const char *name) const noexcept
{
#ifdef ENABLE_SQLITE
	/* if the playlist has stickers, remove theme */
	if (HasStickerDatabase()) {
		try {
			sticker_database->Delete("playlist", name);
		} catch (...) {
		}
	}
#else
	(void)name;
#endif
}

#ifdef ENABLE_SQLITE

void
Instance::OnStickerCleanupDone(bool changed) noexcept
{
	assert(event_loop.IsInside());

	sticker_cleanup.reset();

	if (changed)
		EmitIdle(IDLE_STICKER);

	if (need_sticker_cleanup)
		StartStickerCleanup();
}

void
Instance::StartStickerCleanup()
{
	assert(sticker_database != nullptr);

	if (sticker_cleanup) {
		/* still runnning, start a new one when that one
		   finishes*/
		need_sticker_cleanup = true;
		return;
	}

	need_sticker_cleanup = false;

	sticker_cleanup =
		std::make_unique<StickerCleanupService>(*this,
							*sticker_database,
							*database);
	sticker_cleanup->Start();
}

#endif // ENABLE_SQLITE