Method registerUserEvents

helpers/scanner/file-api.ts:217–250

()

    }

    private registerUserEvents () {
        if ( this.registeredEvents.size > 0 ) {
            return
        }

        const userEvents: Array<[ FileReaderEventName, 'onloadstart' | 'onprogress' | 'onload' | 'onloadend' | 'onabort' ]> = [
            [ 'loadstart', 'onloadstart' ],
            [ 'progress', 'onprogress' ],
            [ 'load', 'onload' ],
            [ 'loadend', 'onloadend' ],
            [ 'abort', 'onabort' ]
        ]

        for ( const [ eventName, propertyName ] of userEvents ) {
            this.emitter.on( eventName, ( event?: FileReaderEventPayload ) => {
                invokeIfFunction( this[ propertyName ], [ event ], this )
            } )
            this.registeredEvents.add( eventName )
        }

        this.emitter.on( 'error', ( event?: FileReaderEventPayload ) => {
            if ( typeof this.onerror === 'function' ) {
                this.onerror( event )
                return
            }

            const error = ( event as FileReaderErrorEvent | undefined )?.target.error

            if ( error && this.emitter.listenerCount( 'error' ) <= 1 ) {
                throw error
            }
        } )
        this.registeredEvents.add( 'error' )
    }

    private mapStreamToEmitter () {
        const stream = this.fileStream