export class FileHelper {
  static toBase64 = async (file: File): Promise<string> => {
    return new Promise((resolve, reject) => {
      const reader = new FileReader()

      reader.readAsDataURL(file)
      reader.onload = () => resolve(reader.result as string)
      reader.onerror = (error) => reject(error)
    })
  }

  static printByURL = (link: string) => {
    try {
      const w: any = window.open(link, '_blank')

      w.focus()
    } catch (e) {
      window.console.error('print error', e)
    }
  }

  static readFileAsync = async (file: File): Promise<string> => {
    return new Promise((resolve, reject) => {
      const reader = new FileReader()

      reader.onload = (ev) => {
        resolve((ev.target ? ev.target.result : '') as any)
      }

      reader.onerror = reject

      reader.readAsText(file)
    })
  }

  static dataURLtoFile = async (dataUrl: string, filename: string): Promise<File> => {
    const res: Response = await fetch(dataUrl)
    const blob: Blob = await res.blob()

    return new File([blob], filename, { type: 'image/png' })
  }
}