@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.
129 lines (119 loc) • 4.76 kB
text/typescript
import { OneDimension } from '../one-dimension';
/**
* EAN13 class is used to calculate the barcode of type EAN13 barcode
*/
export class Ean13 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 {
const checkSumValue: number = this.checksumValue(value);
if (value.search(/^[0-9]{13}$/) !== -1 && (Number(value[12]) === this.checkSumData(value) || Number(value[12]) === checkSumValue)) {
return undefined;
} else if (value.search(/^[0-9]{12}$/) !== -1) {
value += this.checkSumData(value);
this.value = value;
return undefined;
} else {
return 'Accepts 12 numeric characters.';
}
}
private checksumValue(number: string): number {
const res: number = number
.substr(0, 12)
.split('')
.map((n: string) => +n)
.reduce((sum: number, a: number, idx: number) => (idx % 2 ? sum + a * 3 : sum + a), 0);
return (10 - (res % 10)) % 10;
}
private checkSumData(value: string): number {
const sum1: number = 3 * (Number(value[11]) + Number(value[9]) + Number(value[7])
+ Number(value[5]) + Number(value[3]) + Number(value[1]));
const sum2: number = (Number(value[10]) + Number(value[8]) + Number(value[6])
+ Number(value[4])) + Number(value[2]) + Number(value[0]);
const checkSumValue: number = (sum1 + sum2);
const roundOffValue: number = Math.round(checkSumValue / 10) * 10;
return roundOffValue - checkSumValue;
}
// eslint-disable-next-line
private getStructure(): object {
return {
'0': 'LLLLLL',
'1': 'LLGLGG',
'2': 'LLGGLG',
'3': 'LLGGGL',
'4': 'LGLLGG',
'5': 'LGGLLG',
'6': 'LGGGLL',
'7': 'LGLGLG',
'8': 'LGLGGL',
'9': 'LGGLGL'
};
}
// eslint-disable-next-line
private getBinaries(): object {
return {
'L': [ // The L (left) type of encoding
'0001101', '0011001', '0010011', '0111101', '0100011',
'0110001', '0101111', '0111011', '0110111', '0001011'
], 'G': [ // The G type of encoding
'0100111', '0110011', '0011011', '0100001', '0011101',
'0111001', '0000101', '0010001', '0001001', '0010111'
],
'R': [ // The R (right) type of encoding
'1110010', '1100110', '1101100', '1000010', '1011100',
'1001110', '1010000', '1000100', '1001000', '1110100'
],
'O': [ // The O (odd) encoding for UPC-E
'0001101', '0011001', '0010011', '0111101', '0100011',
'0110001', '0101111', '0111011', '0110111', '0001011'
],
'E': [ // The E (even) encoding for UPC-E
'0100111', '0110011', '0011011', '0100001', '0011101',
'0111001', '0000101', '0010001', '0001001', '0010111'
]
};
}
/**
* 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';
const code: string[] = [];
// eslint-disable-next-line
const structureValue: object = this.getStructure();
const structure: string = structureValue[this.value[0]];
code.push(endBars);
let leftString: string = this.value.substr(1, 6);
code.push(this.leftValue(true, structure, leftString));
code.push(middleBar);
leftString = this.value.substr(7, 6);
code.push(this.leftValue(false, 'RRRRRR', leftString));
code.push(endBars);
this.calculateBarCodeAttributes(code, canvas);
}
private leftValue(isLeft: boolean, structure: string, leftString: string): string {
let code: string;
let tempCodes: string;
// eslint-disable-next-line
const codes: object = this.getBinaries();
for (let i: number = 0; i < leftString.length; i++) {
tempCodes = codes[structure[parseInt(i.toString(), 10)]];
if (i === 0) {
code = tempCodes[leftString[parseInt(i.toString(), 10)]];
} else {
code += tempCodes[leftString[parseInt(i.toString(), 10)]];
}
}
return code;
}
}