@stacksjs/qrx/dist/UPC.d.ts

QR & Bar Code generating & reading. Lightweight & powerful.

export declare class UPC extends Barcode {
  displayValue: boolean
  fontSize: number
  guardHeight: number

  constructor(data: string, options: any) {
    if (data.search(/^\d{11}$/) !== -1) {
      data += checksum(data)
    }

    super(data, options)

    this.displayValue = options.displayValue

    if (options.fontSize > options.width * 10) {
      this.fontSize = options.width * 10
    }
    else {
      this.fontSize = options.fontSize
    }

    this.guardHeight = options.height + this.fontSize / 2 + options.textMargin
  }

  valid(): boolean {
    return this.data.search(/^\d{12}$/) !== -1
      && Number(this.data[11]) === checksum(this.data)
  }

  encode(): any {
    if (this.options.flat) {
      return this.flatEncoding()
    }

    return this.guardedEncoding()
  }

  flatEncoding(): { data: string, text: string } {
    let result = ''

    result += '101'
    result += encode(this.data.substr(0, 6), 'LLLLLL')
    result += '01010'
    result += encode(this.data.substr(6, 6), 'RRRRRR')
    result += '101'

    return {
      data: result,
      text: this.text,
    }
  }

  guardedEncoding(): any {
    const result = []

    if (this.displayValue) {
      result.push({
        data: '00000000',
        text: this.text.substr(0, 1),
        options: { textAlign: 'left', fontSize: this.fontSize },
      })
    }

    result.push({
      data: `101${encode(this.data[0], 'L')}`,
      options: { height: this.guardHeight },
    })

    result.push({
      data: encode(this.data.substr(1, 5), 'LLLLL'),
      text: this.text.substr(1, 5),
      options: { fontSize: this.fontSize },
    })

    result.push({
      data: '01010',
      options: { height: this.guardHeight },
    })

    result.push({
      data: encode(this.data.substr(6, 5), 'RRRRR'),
      text: this.text.substr(6, 5),
      options: { fontSize: this.fontSize },
    })

    result.push({
      data: `${encode(this.data[11], 'R')}101`,
      options: { height: this.guardHeight },
    })

    if (this.displayValue) {
      result.push({
        data: '00000000',
        text: this.text.substr(11, 1),
        options: { textAlign: 'right', fontSize: this.fontSize },
      })
    }

    return result
  }
}
export declare function checksum(number: string): number;