Class FileReader

helpers/scanner/file-api.ts:129–337

}

export class FileReader {
    readonly EMPTY = 0
    readonly LOADING = 1
    readonly DONE = 2

    error?: Error
    onabort?: FileReaderListener
    onerror?: FileReaderListener
    onload?: FileReaderListener
    onloadend?: FileReaderListener
    onloadstart?: FileReaderListener
    onprogress?: FileReaderListener
    readyState = this.EMPTY
    result?: NodeBuffer | string

    private readonly emitter = new EventEmitter()
    private file?: NodeFile
    private fileStream?: NodeFileStream
    private format?: ReadFormat
    private encoding?: BufferEncoding
    private readonly registeredEvents = new Set<FileReaderEventName>()

    nodeChunkedEncoding = false

    addEventListener ( eventName: FileReaderEventName, callback: FileReaderListener ) {
        this.emitter.on( eventName, callback )
    }

    removeEventListener ( eventName: FileReaderEventName, callback: FileReaderListener ) {
        this.emitter.removeListener( eventName, callback )
    }

    dispatchEvent ( eventName: FileReaderEventName, payload?: FileReaderEventPayload ) {
        this.emitter.emit( eventName, payload )
    }

    on ( eventName: string | symbol, listener: ( ...args: any[] ) => void ) {
        this.emitter.on( eventName, listener )
    }

    setNodeChunkedEncoding ( value: boolean ) {
        this.nodeChunkedEncoding = value
    }

    abort () {
        if ( this.readyState === this.DONE ) {
            return
        }

        this.readyState = this.DONE
        this.dispatchEvent( 'abort' )
    }

    readAsArrayBuffer ( file: NodeFile ) {
        this.readFile( file, 'buffer' )
    }

    readAsBinaryString ( file: NodeFile ) {