Instagram Time Gate

Hide Instagram except between 17:00 and 20:00

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Instagram Time Gate
// @namespace    https://example.com/instagram-time-gate
// @version      1.0
// @description  Hide Instagram except between 17:00 and 20:00
// @match        https://www.instagram.com/*
// @grant        none
// @license      MIT
// ==/UserScript==

(function () {
    'use strict';

    const START_HOUR = 17; // 17:00
    const END_HOUR = 20;   // 20:00
    const CHECK_INTERVAL = 60 * 1000; // 1 minute

    let blockerOverlay;

    function isAllowedTime() {
        const now = new Date();
        const hour = now.getHours();
        return hour >= START_HOUR && hour < END_HOUR;
    }

    function getInstagramMounts() {
        return Array.from(document.querySelectorAll('div[id^="mount_"]'));
    }

    function hideInstagram() {
        getInstagramMounts().forEach(el => {
            el.style.display = 'none';
        });

        if (!blockerOverlay) {
            blockerOverlay = document.createElement('div');
            blockerOverlay.style.position = 'fixed';
            blockerOverlay.style.top = '0';
            blockerOverlay.style.left = '0';
            blockerOverlay.style.width = '100vw';
            blockerOverlay.style.height = '100vh';
            blockerOverlay.style.background = '#fff';
            blockerOverlay.style.zIndex = '999999';
            blockerOverlay.style.display = 'flex';
            blockerOverlay.style.alignItems = 'center';
            blockerOverlay.style.justifyContent = 'center';
            blockerOverlay.style.fontFamily = 'sans-serif';
            blockerOverlay.style.fontSize = '24px';
            blockerOverlay.style.color = '#333';
            blockerOverlay.innerText = 'Instagram is blocked until 17:00 🕔';

            document.body.appendChild(blockerOverlay);
        }
    }

    function showInstagram() {
        getInstagramMounts().forEach(el => {
            el.style.display = '';
        });

        if (blockerOverlay) {
            blockerOverlay.remove();
            blockerOverlay = null;
        }
    }

    function enforceRule() {
        if (isAllowedTime()) {
            showInstagram();
        } else {
            hideInstagram();
        }
    }

    // Initial run (wait for DOM)
    const observer = new MutationObserver(() => {
        enforceRule();
    });

    observer.observe(document.documentElement, {
        childList: true,
        subtree: true
    });

    enforceRule();
    setInterval(enforceRule, CHECK_INTERVAL);
})();