Disable Messenger calls after making 3 in a single day

script.js

// ==UserScript==
// @name         Limit Messenger Calls
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Disable Messenger calls after making 3 in a single day
// @author       You
// @match        https://www.messenger.com/t/*
// @grant        none
// ==/UserScript==

(function() {
    const text = {
        voice: "Start a voice call",
        video: "Start a video chat"
    };

    const CALLS_THRESHOLD = 3;

    class CallButtons {
        constructor() {
            const array = Array.from(document.getElementsByTagName('div'));
            this.array = array.filter(elem => elem.title && elem.title.contains(text.voice) || elem.title.contains(text.video));
        }

        elements() {
            return this.array;
        }

        remove() {
            this.array.forEach(elem => elem.parentNode.remove());
        };
    }

    class CallsCounter {
        static dateIsToday(date) {
            const now = new Date();
            const isToday = now.getDate() === date.getDate() && now.getMonth() === date.getMonth() && now.getYear() === date.getYear();

            return isToday;
        }

        static reset() {
            localStorage.setItem('timesCalledToday', 0);
            localStorage.setItem('calledOnDay', new Date());
        }

        static get() {
            let lastSet = localStorage.getItem('calledOnDay');
            if(!lastSet || !CallsCounter.dateIsToday(new Date(lastSet)))
                CallsCounter.reset();

            let calledToday = localStorage.getItem('timesCalledToday');

            return calledToday ? parseInt(calledToday) : 0;
        }

        static increment() {
            const calls = CallsCounter.get() + 1;
            localStorage.setItem('timesCalledToday', calls);
            console.log('called ' + calls);
            return calls;
        }

    }

    const hideButtonsIfMatchingThreshold = (buttons) => {
        const timesCalled = CallsCounter.get();
        if(timesCalled === CALLS_THRESHOLD) {
            buttons = buttons || new CallButtons();
            buttons.remove();
        }
    }

    const handleClickCallButtons = () => {
        const calls = CallsCounter.increment();
        if(calls === CALLS_THRESHOLD)
            alert('This is your last call today!');
        hideButtonsIfMatchingThreshold();
    }

    const observer = new MutationObserver(() => {
        const buttons = new CallButtons();
        hideButtonsIfMatchingThreshold(buttons);
        buttons.elements().forEach(elem => {
            elem.onclick = handleClickCallButtons;
        })
     });

    const main = async () => {
        observer.observe(document, {attributes: false, childList: true, characterData: false, subtree:true});
    }

    main();
})();