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/***
This file is part of snapcast
Copyright (C) 2014-2024 Johannes Pohl
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 3 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, see <http://www.gnu.org/licenses/>.
***/
// prototype/interface header file
#include "properties.hpp"
// local headers
#include "common/aixlog.hpp"
// standard headers
#include <set>
static constexpr auto LOG_TAG = "Properties";
namespace
{
template <typename T>
void readTag(const json& j, const std::string& tag, std::optional<T>& dest)
{
try
{
if (!j.contains(tag))
dest = std::nullopt;
else
dest = j[tag].get<T>();
}
catch (const std::exception& e)
{
LOG(ERROR, LOG_TAG) << "failed to read tag: '" << tag << "': " << e.what() << '\n';
}
}
template <typename T>
void readTag(const json& j, const std::string& tag, T& dest, const T& def)
{
std::optional<T> val;
readTag(j, tag, val);
if (val.has_value())
dest = val.value();
else
dest = def;
}
template <typename T>
void addTag(json& j, const std::string& tag, const T& source)
{
try
{
j[tag] = source;
}
catch (const std::exception& e)
{
LOG(ERROR, LOG_TAG) << "failed to add tag: '" << tag << "': " << e.what() << '\n';
}
}
template <typename T>
void addTag(json& j, const std::string& tag, const std::optional<T>& source)
{
if (!source.has_value())
{
if (j.contains(tag))
j.erase(tag);
}
else
addTag(j, tag, source.value());
}
} // namespace
Properties::Properties(const json& j)
{
fromJson(j);
}
json Properties::toJson() const
{
json j;
if (playback_status.has_value())
addTag(j, "playbackStatus", std::optional<std::string>(to_string(playback_status.value())));
if (loop_status.has_value())
addTag(j, "loopStatus", std::optional<std::string>(to_string(loop_status.value())));
addTag(j, "rate", rate);
addTag(j, "shuffle", shuffle);
addTag(j, "volume", volume);
addTag(j, "mute", mute);
addTag(j, "position", position);
addTag(j, "minimumRate", minimum_rate);
addTag(j, "maximumRate", maximum_rate);
addTag(j, "canGoNext", can_go_next);
addTag(j, "canGoPrevious", can_go_previous);
addTag(j, "canPlay", can_play);
addTag(j, "canPause", can_pause);
addTag(j, "canSeek", can_seek);
addTag(j, "canControl", can_control);
if (metadata.has_value())
addTag(j, "metadata", metadata->toJson());
return j;
}
void Properties::fromJson(const json& j)
{
static std::set<std::string> rw_props = {"loopStatus", "shuffle", "volume", "mute", "rate"};
static std::set<std::string> ro_props = {"playbackStatus", "loopStatus", "shuffle", "volume", "mute", "position", "minimumRate", "maximumRate",
"canGoNext", "canGoPrevious", "canPlay", "canPause", "canSeek", "canControl", "metadata"};
for (const auto& element : j.items())
{
bool is_rw = (rw_props.find(element.key()) != rw_props.end());
bool is_ro = (ro_props.find(element.key()) != ro_props.end());
if (!is_rw && !is_ro)
LOG(WARNING, LOG_TAG) << "Property not supoorted: " << element.key() << "\n";
}
std::optional<std::string> opt;
readTag(j, "playbackStatus", opt);
if (opt.has_value())
playback_status = playback_status_from_string(opt.value());
else
playback_status = std::nullopt;
readTag(j, "loopStatus", opt);
if (opt.has_value())
loop_status = loop_status_from_string(opt.value());
else
loop_status = std::nullopt;
readTag(j, "rate", rate);
readTag(j, "shuffle", shuffle);
readTag(j, "volume", volume);
readTag(j, "mute", mute);
readTag(j, "position", position);
readTag(j, "minimumRate", minimum_rate);
readTag(j, "maximumRate", maximum_rate);
readTag(j, "canGoNext", can_go_next, false);
readTag(j, "canGoPrevious", can_go_previous, false);
readTag(j, "canPlay", can_play, false);
readTag(j, "canPause", can_pause, false);
readTag(j, "canSeek", can_seek, false);
readTag(j, "canControl", can_control, false);
if (j.contains("metadata"))
{
Metadata m;
m.fromJson(j["metadata"]);
metadata = m;
}
else
metadata = std::nullopt;
}
bool Properties::operator==(const Properties& other) const
{
// expensive, but not called ofetn and less typing
return (toJson() == other.toJson());
// clang-format off
// return (playback_status == other.playback_status &&
// loop_status == other.loop_status &&
// rate == other.rate &&
// shuffle == other.shuffle &&
// volume == other.volume &&
// position == other.position &&
// minimum_rate == other.minimum_rate &&
// maximum_rate == other.maximum_rate &&
// can_go_next == other.can_go_next &&
// can_go_previous == other.can_go_previous &&
// can_play == other.can_play &&
// can_pause == other.can_pause &&
// can_seek == other.can_seek &&
// can_control == other.can_control);
// clang-format on
}
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