@syncfusion/ej2-barcode-generator
Version:
Barcode generator component is a pure JavaScript library which will convert a string to Barcode and show it to the user. This supports major 1D and 2D barcodes including coda bar, code 128, QR Code.
103 lines (94 loc) • 3.29 kB
text/typescript
import { OneDimension } from '../one-dimension';
/**
* EAN8 class is used to calculate the barcode of type EAN8 barcode
*/
export class Ean8 extends OneDimension {
/**
* Validate the given input.
*
* @returns {string} Validate the given input.
* @param {string} value - provide the input values .
* @private
*/
public validateInput(value: string): string {
if (value.search(/^[0-9]{8}$/) !== -1 && Number(value[7]) === this.checkSumData(value)) {
return undefined;
} else {
return 'Accepts 8 numeric characters.';
}
}
// eslint-disable-next-line
private getCodeValueRight(right: boolean): object {
// eslint-disable-next-line
let codes: object;
if (right) {
codes = {
'0': '0001101',
'1': '0011001',
'2': '0010011',
'3': '0111101',
'4': '0100011',
'5': '0110001',
'6': '0101111',
'7': '0111011',
'8': '0110111',
'9': '0001011'
};
} else {
codes = {
'0': '1110010',
'1': '1100110',
'2': '1101100',
'3': '1000010',
'4': '1011100',
'5': '1001110',
'6': '1010000',
'7': '1000100',
'8': '1001000',
'9': '1110100'
};
}
return codes;
}
private checkSumData(value: string): number {
for (let i: number = 0; i < value.length; i++) {
const sum1: number = Number(value[1]) + Number(value[3]) + Number(value[5]);
const sum2: number = 3 * (Number(value[0]) + Number(value[2]) + Number(value[4]) + Number(value[6]));
const checkSumValue: number = sum1 + sum2;
let checkSumDigit: number = 10 - (checkSumValue % 10);
return checkSumDigit === 0 ? checkSumDigit = 0 : checkSumDigit;
}
return 0;
}
/**
* Draw the barcode SVG.\
*
* @returns {void} Draw the barcode SVG .
* @param {HTMLElement} canvas - Provide the canvas element .
* @private
*/
public draw(canvas: HTMLElement): void {
const endBars: string = '101';
const middleBar: string = '01010';
let codes: string[] = this.getCodeValueRight(true) as string[];
const code: string[] = [];
code.push(endBars);
code.push(this.leftValue(codes, true));
code.push(middleBar);
codes = this.getCodeValueRight(false) as string[];
code.push(this.leftValue(codes, false));
code.push(endBars);
this.calculateBarCodeAttributes(code, canvas);
}
private leftValue(codes: string[], isLeft: boolean): string {
let code: string;
for (let i: number = isLeft ? 0 : this.value.length - 4; i < (isLeft ? this.value.length - 4 : this.value.length); i++) {
if (i === 0 || i === 4) {
code = codes[this.value[parseInt(i.toString(), 10)]];
} else {
code += codes[this.value[parseInt(i.toString(), 10)]];
}
}
return code;
}
}