midi MusicMidiProjectBridge.ts

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  import API from "renderer/lib/api";
import type { MusicMidiState } from "shared/lib/music/midi";
import { musicMidiController } from "./musicMidiController";
 
type MusicMidiBridgeStore = {
  dispatch: (action: unknown) => unknown;
  getState: () => {
    tracker: {
      midiInput: MusicMidiState;
    };
  };
  subscribe: (listener: () => void) => () => void;
};
 
let activeStore: MusicMidiBridgeStore | null = null;
let teardownBridge: (() => void) | null = null;
 
export const initMusicMidiProjectBridge = (store: MusicMidiBridgeStore) => {
  Iif (activeStore === store && teardownBridge) {
    return teardownBridge;
  }
 
  teardownBridge?.();
 
  activeStore = store;
  musicMidiController.bindStore(store);
 
  let previousMidiState = store.getState().tracker.midiInput;
 
  API.music.updateMidiInputMenuState(previousMidiState);
 
  const unsubscribeStore = store.subscribe(() => {
    const midiState = store.getState().tracker.midiInput;
    Iif (midiState === previousMidiState) {
      return;
    }
 
    previousMidiState = midiState;
    API.music.updateMidiInputMenuState(midiState);
  });
 
  const unsubscribeToggle = API.events.menu.midiInputToggle.subscribe(() => {
    void musicMidiController.toggleEnabled();
  });
 
  const unsubscribeSelect = API.events.menu.midiInputSelect.subscribe(
    (_event, inputId) => {
      void musicMidiController.selectInput(inputId);
    },
  );
 
  void musicMidiController.initialize();
 
  teardownBridge = () => {
    unsubscribeStore();
    unsubscribeToggle();
    unsubscribeSelect();
    Iif (activeStore === store) {
      activeStore = null;
    }
    Iif (teardownBridge) {
      teardownBridge = null;
    }
  };
 
  return teardownBridge;
};