EFT: Subreddit ban message editor

// ==UserScript==
// @name         Reddit Ban Editor - EFT Subreddit
// @namespace    https://reddit.com
// @version      2.0
// @description  Tampermonkey script to replace the Reddit ban icon and message on r/EscapefromTarkov
// @author       You
// @match        https://www.reddit.com/r/EscapefromTarkov/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// @run-at       document-start
// ==/UserScript==

// Turns my tarkov reddit permanent ban message (i said "autist cheaters", the moderator took it personally) into a countdown for WW3.

(function(){
    'use strict';

    function getDaysUntil(dateStr) {
        const now = new Date();
        const target = new Date(dateStr);
        const diffTime = target - now;
        const diffDays = Math.round(diffTime / (1000 * 60 * 60 * 24));
        return diffDays > 0
            ? `${diffDays} day${diffDays !== 1 ? 's' : ''} remaining.`
            : `Welcome to the Rice Fields! ☠`;
    }

    function generateMessage() {
        const trumpDeadline = '2025-09-01T12:00:00';
        const xiPutinSummit = '2025-09-02T00:00:00';
        const amphibiousWindow = '2025-09-15T00:00:00';
        const fullDeploymentDate = '2027-12-31T12:00:00'; // German brigade to Lithuania

        const message1 = `Trump issues Sept 1 deadline to Russia: ${getDaysUntil(trumpDeadline)}`;

        const message2 = `Xi–Putin Beijing summit Sept 2: ${getDaysUntil(xiPutinSummit)}`;

        // Why September 15–19 Is Ideal:
        //
        //     It falls just before the new moon (Sept 21) and between spring tide events (Sept 10 and Sept 24), meaning tidal conditions are in a low-to-rising phase, which is favorable for beach approaches.
        //
        //     Nighttime during this window offers minimal moonlight (darkest part of lunar cycle), and the seas are predictable with enhanced tidal height variations—a tactical advantage for stealth and beach access.
        //
        // | Date Range | Lunar Phase                                  | Tidal Status                      | Impact                                     |
        // | ---------- | -------------------------------------------- | --------------------------------- | ------------------------------------------ |
        // | Sept 15–19 | Waxing crescent approaching new moon Sept 21 | Between spring tides (Sept 10–24) | Low-to-rising tides, strong current window |
        // | Sept 21    | New Moon                                     | Maximum spring effect             | Darkest night for stealth                  |
        // | Sept 24    | Post new moon                                | Spring tide peak                  | Reaffirming tidal extremes                 |
        const message3 = `AI says optimal conditions for chinese invasion of Taiwan Sept 15-19: ${getDaysUntil(amphibiousWindow)}`;

        const message4 = `German brigade fully deployed by end of 2027: ${getDaysUntil(fullDeploymentDate)}`;

        return `► ${message1} ► ${message2} ► ${message3} ► ${message4}`;
    }

    function createEmojiIcon(emojiText = '🤠') {
        const emoji = document.createElement('span');
        emoji.textContent = emojiText;
        Object.assign(emoji.style, {
            fontSize: '28px',
            marginRight: '12px',
            lineHeight: '1em',
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'center',
            height: '100%',
        });
        return emoji;
    }

    function patchBanBanner() {
        const banner = document.querySelector('div[slot="post-banned-banner"]');
        if (!banner) return false;

        let patched = false;

        // Replace icon if not already replaced
        const icon = banner.querySelector('svg[icon-name^="ban"]');
        if (icon) {
            icon.replaceWith(createEmojiIcon());
            patched = true;
        }

        const msg = banner.querySelector('span.flex-auto');
        const newText = generateMessage();
        if (msg && msg.textContent.trim() !== newText) {
            msg.textContent = newText;
            patched = true;
        }

        return patched;
    }

    function observeOnceBannerExists() {
        const tryInterval = setInterval(() => {
            const banner = document.querySelector('div[slot="post-banned-banner"]');
            if (banner) {
                clearInterval(tryInterval);
                patchBanBanner();

                const observer = new MutationObserver(() => {
                    try {
                        patchBanBanner();
                    } catch (e) {
                        console.warn('Reddit Ban Editor error:', e);
                    }
                });
                observer.observe(document.body, { childList: true, subtree: true });
            }
        }, 250);
    }

    function setupSPAWatches() {
        const originalPushState = history.pushState;
        const originalReplaceState = history.replaceState;

        function triggerPatch() {
            setTimeout(() => {
                observeOnceBannerExists();
                patchBanBanner();
            }, 200);
        }

        history.pushState = function (...args) {
            originalPushState.apply(this, args);
            triggerPatch();
        };

        history.replaceState = function (...args) {
            originalReplaceState.apply(this, args);
            triggerPatch();
        };

        window.addEventListener('popstate', triggerPatch);
    }

    setupSPAWatches();
    observeOnceBannerExists();

    // Periodic update every hour to keep countdown fresh
    setInterval(patchBanBanner, 60 * 60 * 1000);
})();