112 lines
2.8 KiB
JavaScript
112 lines
2.8 KiB
JavaScript
var _ = require("lodash");
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var QRCode = require("qrcode");
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const moment = require("moment");
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const config = require("../config");
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const { colourNameToHex } = require("./color.helper");
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const luma = (color) => { // color can be a hx string or an array of RGB values 0-255
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const rgb = (typeof color === 'string') ? hexToRGBArray(color) : color;
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return (0.2126 * rgb[0]) + (0.7152 * rgb[1]) + (0.0722 * rgb[2]); // SMPTE C, Rec. 709 weightings
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}
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const hexToRGBArray = (color) => {
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if (color.length === 3)
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color = color.charAt(0) + color.charAt(0) + color.charAt(1) + color.charAt(1) + color.charAt(2) + color.charAt(2);
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else if (color.length !== 6)
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console.debug('Invalid hex color: ' + color);
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const rgb = [];
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for (var i = 0; i <= 2; i++)
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rgb[i] = parseInt(color.substr(i * 2, 2), 16);
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return rgb;
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}
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const calculateContrastingColor = (color) => {
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var _color = '#000';
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if (typeof color !== 'string') {
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return _color;
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}
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if (color.charAt(0) !== '#') {
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_color = colourNameToHex(color);
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}
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_color = _color.replace('#', '');
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return (luma(_color) >= 165) ? '#000' : '#fff';
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}
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module.exports.getInscriptionQRCodeUrl = function (inscriptionId) {
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return encodeURI(`${config.server.public_url}/inscriptions/${inscriptionId}/qrimage`);
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};
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/* params = {
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code: 'xxxx',
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date: 'date-time',
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name: 'xxxx',
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surname: 'xxxx',
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color: '#ff',
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} */
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module.exports.getInscriptionQRCode = function (params) {
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return new Promise(function (resolve, reject) {
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/* var texto =
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_.padStart(params.code, 4, "0") +
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"\n" +
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moment(params.date).format("DD/MM/YY HH:mm ") +
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params.name +
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" " +
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params.surname;
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*/
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var texto =
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_.padStart(params.code, 4, "0");
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var options = {
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errorCorrectionLevel: "M",
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};
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if (params.color) {
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options = _.assign(options, {
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color: {
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light: params.color ? colourNameToHex(params.color) : "#000000",
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dark: calculateContrastingColor(params.color), //"#ffffff",
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},
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});
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}
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QRCode.toDataURL(texto, options, function (err, qrcode) {
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if (err) resolve("");
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// console.log('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' + qrcode);
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resolve(qrcode);
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});
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/*
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QRCode.toString(texto, options, function (err, qrcode) {
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if (err) resolve('');
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console.log('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' + qrcode);
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resolve(qrcode);
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});
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*/
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});
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};
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module.exports.generateQRConfig = function (params) {
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let qrConfig = null;
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if (params) {
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qrConfig = {
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name: params.name,
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surname: params.surname,
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date: params.date_inscription,
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code: params.code_ticket,
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color: params.color,
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};
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}
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console.log('generateQRConfig<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<', params, qrConfig);
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return qrConfig;
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};
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