track_routing.h

// SPDX-FileCopyrightText: © 2025 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include "structure/tracks/track.h"
 
namespace zrythm::structure::tracks
{
class TrackRouting : public QObject
{
  Q_OBJECT
  QML_ELEMENT
  QML_UNCREATABLE ("")
public:
  TrackRouting (TrackRegistry &track_registry, QObject * parent = nullptr)
      : QObject (parent), track_registry_ (track_registry)
  {
  }
 
  // ========================================================================
  // QML Interface
  // ========================================================================
 
  Q_INVOKABLE QVariant getOutputTrack (const Track * source) const;
 
  Q_INVOKABLE void
  setOutputTrack (const Track * source, const Track * destination);

  Q_SIGNAL void routingChanged ();
 
  // ========================================================================
 
  void
  add_or_replace_route (const TrackUuid &source, const TrackUuid &destination)
  {
    track_routes_.insert_or_assign (source, destination);
    Q_EMIT routingChanged ();
  }
  void remove_route_for_source (const TrackUuid &source)
  {
    track_routes_.erase (source);
    Q_EMIT routingChanged ();
  }
  void remove_routes_for_destination (const TrackUuid &destination)
  {
    std::erase_if (track_routes_, [&destination] (const auto &kv) {
      return kv.second == destination;
    });
    Q_EMIT routingChanged ();
  }
 
  std::optional<TrackUuidReference>
  get_output_track (const TrackUuid &source) const;
 
private:
  static constexpr auto kTrackRoutesKey = "trackRoutes"sv;
  friend void           to_json (nlohmann::json &j, const TrackRouting &t)
  {
    j[kTrackRoutesKey] = t.track_routes_;
  }
  friend void from_json (const nlohmann::json &j, TrackRouting &t)
  {
    j.at (kTrackRoutesKey).get_to (t.track_routes_);
  }
 
private:
  TrackRegistry &track_registry_;

  std::unordered_map<TrackUuid, TrackUuid> track_routes_;
};
} // namespace zrythm::structure::tracks