RocketChat/Rocket.Chat

const fs = require('fs');

const { parseString, Builder } = require('xml2js');
// const jp = require('@f5io/jsonpath').default;

// const path = '$..path';

const builder = new Builder({
    headless: true,
});

const parse = (str) => new Promise((resolve, reject) => parseString(str, (err, json) => (err ? reject(err) : resolve(json))));

const sort = function (a, b) {
    if (a.toLocaleLowerCase() < b.toLocaleLowerCase()) {
        return -1;
    }
    if (a.toLocaleLowerCase() > b.toLocaleLowerCase()) {
        return 1;
    }
    return 0;
};

const toSymbol = (id, viewBox, { id: _, ...args }) => ({
    symbol: {
        $: {
            id: `icon-${id}`,
            viewBox,
            fill: 'currentColor',
        },
        ...args,
    },
});

const xml = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="display: none">';
const start = async () => {
    const stream = fs.createWriteStream('icons.svg', { flags: 'w' });
    stream.write(`${xml}\n`);
    try {
        await new Promise((resolve) => {
            const path = './icons';
            fs.readdir(path, async (err, files) => {
                const promises = files
                    .sort(sort)
                    .filter((file) => {
                        if (!/\.svg/.test(file)) {
                            console.log(`invalid extension ${file}`);
                            return false;
                        }
                        return true;
                    })
                    .map(async (file) => {
                        const name = file.replace('.svg', '').toLocaleLowerCase();
                        try {
                            const content = fs.readFileSync(`${path}/${file}`, 'utf8');
                            const { svg } = await parse(content);

                            const { $, ...args } = svg;
                            const { viewBox } = $;
                            stream.write(`${builder.buildObject(toSymbol(name, viewBox, args))}\n`);
                        } catch (error) {
                            console.log(error);
                            return Promise.resolve(error);
                        }
                    });

                resolve(Promise.all(promises));
            });
        });
    } catch (error) {
        console.error(error);
    } finally {
        stream.write('</svg>');
        stream.end();
    }
};

try {
    start();
} catch (error) {
    console.error(error);
}