bigly-chat/form/follow.js

import Route from "../route.js";
import initDb from "../db.js";
import auth from "../form/auth.js";

let db = await initDb();
function isValid(user) {
    return user.search(/[^A-Za-z0-9\-\_]/g) == -1;
}

let main = new Route([auth], async function (req, res, input) {
    let { username } = input;

    let { target } = req.body;
    if (!isValid(target) || username == '!nobody')
        return { 'success': false, 'message': 'Some fields are missing' };

    let isFollowing = await db.all('SELECT * FROM follow WHERE username = ? AND target = ?', [
        username,
        target
    ]);

    if (isFollowing.length > 0) {
        await db.run('DELETE FROM follow WHERE username = ? AND target = ?', [
            username,
            target
        ]);
        res.send({ 'success': true, 'message': 'User unfollowed' });
    } else {
        await db.run('INSERT INTO follow (username,target) VALUES (?,?)', [
            username,
            target
        ]);
        res.send({ 'success': true, 'message': 'User followed' });
    }
});

export default main;