Telereview/code/interface_borne/assets/js/state_manager.js

const STATE = {
    sleeping: 0,
    video: 1,
    audio: 2,
    thankYou: 3,
};

class StateManager {
    constructor(canvas) {
        this.canvas = canvas;
        this._state = STATE.sleeping;
        this._cameraPage = new CameraPage(this.canvas);
        this.wsClient = new WebsocketClient(
            (effects) => this._cameraPage.setEffects(effects),
            (state) => this.changeState(state)
        );
    }

    setState(newState) {
        if(this._state == STATE.sleeping && newState == STATE.video) {
            this._cameraPage.enabled = true;
        }
    }
}