Zaimki/server/banner.js

import { buildTemplate } from "../src/buildTemplate";
import { createCanvas, registerFont, loadImage } from 'canvas';

export default async function (req, res, next) {
    if (req.url.substr(req.url.length - 4) !== '.png') {
        res.statusCode = 404;
        res.write('Not found');
        res.end();
        return;
    }
    const template = buildTemplate(decodeURIComponent(req.url.substr(1, req.url.length - 5)));

    const width = 1200
    const height = 600
    const mime = 'image/png';
    const imageSize = 200;
    const leftRatio = template ? 4 : 5;

    registerFont('static/fonts/quicksand-v21-latin-ext_latin-regular.ttf', { family: 'Quicksand', weight: 'regular'});
    registerFont('static/fonts/quicksand-v21-latin-ext_latin-700.ttf', { family: 'Quicksand', weight: 'bold'});

    const canvas = createCanvas(width, height)
    const context = canvas.getContext('2d')

    context.fillStyle = '#fff'
    context.fillRect(0, 0, width, height)
    context.fillStyle = '#000'

    const image = await loadImage('node_modules/@fortawesome/fontawesome-pro/svgs/light/tags.svg');
    context.drawImage(image, width / leftRatio - imageSize / 2, height / 2 - imageSize / 1.25 / 2, imageSize, imageSize / 1.25)

    if (template) {
        context.font = 'regular 48pt Quicksand'
        context.fillText('Moje zaimki to:', width / leftRatio + imageSize / 1.5, height / 2 - 36)

        context.font = 'bold 70pt Quicksand'
        context.fillText(template.name(), width / leftRatio + imageSize / 1.5, height / 2 + 72)
    } else {
        context.font = 'regular 120pt Quicksand'
        context.fillText('Zaimki.pl', width / leftRatio + imageSize / 1.5, height / 2 + 48)
    }

    res.setHeader('content-type', mime);
    res.write(canvas.toBuffer(mime));
    res.end()
}