salix/print/templates/reports/buy-label-qr/buy-label-qr.js

const UserError = require('vn-loopback/util/user-error');
const moment = require('moment');
const qrcode = require('qrcode');

module.exports = {
    name: 'buy-label-qr',
    async serverPrefetch() {
        this.date = Date.vnNew();
        this.buys = await this.rawSqlFromDef('buy', [this.copies || 1, this.id]);
        if (!this.buys.length) throw new UserError(`Empty data source`);
        this.qr = await this.getQr(this.buys[0].buyFk);
        this.date = moment(this.date).format('WW/DD');
    },
    methods: {
        getQr(data) {
            data = {
                company: this.buys.company,
                user: this.userId,
                created: this.date,
                table: 'buy',
                id: data
            };
            return qrcode.toDataURL(JSON.stringify(data), {
                margin: 0,
                errorCorrectionLevel: 'L'
            });
        },
        formatNumber(number) {
            return new Intl.NumberFormat('es-ES', {maximumFractionDigits: 0}).format(number);
        }
    },
    props: {
        id: {
            type: Number,
            required: true,
            description: 'The item id'
        },
        warehouseId: {
            type: Number
        },
        packing: {
            type: Number
        },
        copies: {
            type: Number
        },
        userId: {
            type: Number
        },
        typeId: {
            type: String
        }
    }
};