salix/print/lib/reportEngine.js

96 lines
2.6 KiB
JavaScript

const Vue = require('vue');
const VueI18n = require('vue-i18n');
const renderer = require('vue-server-renderer').createRenderer();
const fs = require('fs-extra');
const pdf = require('phantom-html2pdf');
const juice = require('juice');
Vue.use(VueI18n);
if (!process.env.OPENSSL_CONF)
process.env.OPENSSL_CONF = '/etc/ssl/';
module.exports = {
path: `${appPath}/reports`,
/**
* Renders a report component
*
* @param {String} name - Report name
* @param {Object} ctx - Request context
*/
async render(name, ctx) {
const component = require(`${this.path}/${name}`);
await this.preFetch(component, ctx);
const i18n = new VueI18n({
locale: 'es',
});
const app = new Vue({
i18n,
render: h => h(component),
});
return renderer.renderToString(app);
},
/**
* Prefetch all component data from asyncData method
*
* @param {Object} component - Component object
* @param {Object} ctx - Request context
*/
async preFetch(component, ctx) {
let data = {};
await this.attachAssets(component);
if (component.hasOwnProperty('data'))
data = component.data();
if (component.hasOwnProperty('asyncData')) {
const fetch = await component.asyncData(ctx, ctx.body);
const mergedData = {...data, ...fetch};
component.data = function data() {
return mergedData;
};
}
if (component.components) {
const components = component.components;
const promises = [];
Object.keys(components).forEach(component => {
promises.push(this.preFetch(components[component], ctx));
});
return Promise.all(promises);
}
},
async attachAssets(component) {
const localePath = `${this.path}/${component.name}/locale.js`;
const templatePath = `${this.path}/${component.name}/index.html`;
const stylePath = `${this.path}/${component.name}/assets/css/style.css`;
const template = await fs.readFile(templatePath, 'utf8');
const css = await fs.readFile(stylePath, 'utf8');
component.i18n = require(localePath);
component.template = juice.inlineContent(template, css);
},
async toPdf(name, ctx) {
const options = {
html: await this.render(name, ctx),
};
const result = await pdf.convert(options);
const stream = await result.toStream();
return stream;
},
};