import { getSettings } from '../SettingsHandler.ipc' ; type EventCallback = { 'waitProgress' : ( remainingSeconds : number , totalSeconds : number ) => void ; 'complete' : ( ) => void ; } ; type Callbacks = { [ E in keyof EventCallback ] ? : EventCallback [ E ] ; } ; class GoogleTimer { private rateLimitCounter = Infinity ; private callbacks : Callbacks = { } ; /**
     * Initializes the timer to call the callbacks if they are defined.
     */ constructor ( ) { setInterval ( ( ) => { this . rateLimitCounter ++ ; this . updateCallbacks ( ) ; } , 1000 ) ; } /**
     * Calls `callback` when `event` fires. (no events will be fired after `this.cancelTimer()` is called)
     */ on < E extends keyof EventCallback > ( event , callback ) { this . callbacks [ event ] = callback ; this . updateCallbacks ( ) ; } /**
     * Check the state of the callbacks and call them if necessary.
     */ private updateCallbacks ( ) { if ( this . hasTimerEnded ( ) && this . callbacks . complete != undefined ) { this . endTimer ( ) ; } else if ( this . callbacks . waitProgress != undefined ) { const delay = getSettings ( ) . rateLimitDelay ; this . callbacks . waitProgress ( delay - this . rateLimitCounter , delay ) ; } } /**
     * Prevents the callbacks from activating when the timer ends.
     */ cancelTimer ( ) { this . callbacks = { } ; } /**
     * Checks if enough time has elapsed since the last timer activation.
     */ private hasTimerEnded ( ) { return this . rateLimitCounter > getSettings ( ) . rateLimitDelay ; } /**
     * Activates the completion callback and resets the timer.
     */ private endTimer ( ) { this . rateLimitCounter = 0 ; const completeCallback = this . callbacks . complete ; this . callbacks = { } ; completeCallback ( ) ; } } /**
 * Important: this instance cannot be used by more than one file download at a time.
 */ export const googleTimer = new GoogleTimer ( ) ;