salix/print/templates/reports/cmr/cmr.js

const config = require(`vn-print/core/config`);
const vnReport = require('../../../core/mixins/vn-report.js');
const md5 = require('md5');
const fs = require('fs-extra');
const qrcode = require('qrcode');

const prefixBase64 = 'data:image/png;base64,';

module.exports = {
    name: 'cmr',
    mixins: [vnReport],
    async serverPrefetch() {
        this.data = await this.findOneFromDef('data', [this.id]);
        if (this.data.ticketFk) {
            this.merchandises = await this.rawSqlFromDef('merchandise', [this.data.ticketFk]);
            this.signature = await this.findOneFromDef('signature', [this.data.ticketFk]);
        } else
            this.merchandises = null;

        this.senderStamp = (this.data.senderStamp)
            ? `${prefixBase64} ${this.data.senderStamp.toString('base64')}`
            : null;
        this.deliveryStamp = (this.data.deliveryStamp)
            ? `${prefixBase64} ${this.data.deliveryStamp.toString('base64')}`
            : null;
        this.truckPlateQr = await this.getQR(this.data.truckPlate);
    },
    props: {
        id: {
            type: Number,
            required: true,
            description: 'The cmr id'
        },
    },
    computed: {
        signPath() {
            if (!this.signature) return;

            const signatureName = this.signature.signature;
            const hash = md5(signatureName.toString()).substring(0, 3);
            const file = `${config.storage.root}/${hash}/${signatureName}.png`;
            if (!fs.existsSync(file)) return null;

            return `${prefixBase64} ${Buffer.from(fs.readFileSync(file), 'utf8').toString('base64')}`;
        },
    },
    methods: {
        getQR(id) {
            return qrcode.toDataURL(String(id), {margin: 0});
        },
    }
};