Discord - Custom Background Image

You can set custom background image of Discord

您需要先安裝使用者腳本管理器擴展,如 TampermonkeyGreasemonkeyViolentmonkey 之後才能安裝該腳本。

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

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyUserscripts 後才能安裝該腳本。

你需要先安裝一款使用者腳本管理器擴展,比如 Tampermonkey,才能安裝此腳本

您需要先安裝使用者腳本管理器擴充功能後才能安裝該腳本。

(我已經安裝了使用者腳本管理器,讓我安裝!)

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

(我已經安裝了使用者樣式管理器,讓我安裝!)

// ==UserScript==
// @name         Discord - Custom Background Image
// @namespace    http://tampermonkey.net/
// @version      0.9
// @description  You can set custom background image of Discord
// @author       You
// @match        https://discord.com/channels/*
// @match        https://discord.com/channels/*/*
// @icon         https://www.google.com/s2/favicons?domain=discord.com
// @grant        GM.xmlHttpRequest
// @grant        GM.registerMenuCommand
// @grant        GM.getValue
// @grant        GM.setValue
// @grant        GM.addElement
// @connect      i.imgur.com
// @license      MIT
// ==/UserScript==

(async window => {
    'use strict';

    let intervalTime = 30 * 1000;
    let urls = [
        'https://i.imgur.com/cHKbKQT.jpeg',
        'https://i.imgur.com/sqmqy20.png',
        'https://i.imgur.com/cCL6TPk.jpeg',
        'https://i.imgur.com/Z6GYpxh.jpeg',
        'https://i.imgur.com/FNJdY5h.jpeg',
        'https://i.imgur.com/uKVG1XM.jpeg'
    ];

    let g_elm = null;

    const del = () => {
        if (g_elm) {
            g_elm.remove();
            g_elm = null;
            return true;
        }
        return false;
    };

    const addInput = async (value) => {
        if (del()) return;

        g_elm = await GM.addElement(document.body, 'div', {});
        Object.assign(g_elm.style, {
            'position': 'fixed',
            'width': '100vw',
            'height': '100vh',
            'display': 'flex',
            'flex-wrap': 'wrap',
            'justify-content': 'center',
            'align-items': 'center',
            'z-index': Infinity
        });

        const input = await GM.addElement(g_elm, 'textarea', {
            textContent: value
        });

        Object.assign(input.style, {
            'width': '50vw',
            'height': '30vh',
            'font-size': '24px',
            'font-weight': 'bold'
        });

        const btnSave = await GM.addElement(g_elm, 'button', {
            textContent: 'save'
        });

        await GM.addElement(g_elm, 'div', {
            textContent: ' '
        });

        const btnCancel = await GM.addElement(g_elm, 'button', {
            textContent: 'cancel'
        });

        for (const v of [btnSave, btnCancel]) {
            Object.assign(v.style, {
                'color': 'white',
                'backgroundColor': 'red'
            });
        }

        return new Promise((resolve, reject) => {
            btnSave.addEventListener('click', () => del() && resolve(input.value));
            btnCancel.addEventListener('click', () => del() && reject());
        });
    };

    const key1 = 'intervalTime';
    GM.registerMenuCommand('config interval time', async () => {
        const res = await addInput(await GM.getValue(key1, intervalTime));
        if (!res) return;

        const m = res.match(/[0-9]+/);
        if (!m) return;

        const n = Number(m[0]);
        intervalTime = n;
        GM.setValue(key1, n);
    });

    intervalTime = await GM.getValue(key1, intervalTime);

    const key2 = 'URL';
    GM.registerMenuCommand('config URL', async () => {
        const res = await addInput(await GM.getValue(key2, urls.join('\n')));
        if (!res) return;

        const a = findURL(res);
        if (!a.length) return;

        urls = a;
        GM.setValue(key2, a.join('\n'));
    });

    urls = (await GM.getValue(key2, urls.join('\n'))).split('\n');

    const findURL = (str) => {
        const m = str.match(/(https?|ftp)(:\/\/[-_.!~*'()a-zA-Z0-9;\/?:@&=+$,%#]+)/g);
        return m || [];
    };

    const memo = new Map();
    const get = async (url) => {
        if (memo.has(url)) return memo.get(url);

        const res = await GM.xmlHttpRequest({
            method: 'GET',
            url: url,
            withCredentials: true,
            responseType: 'arraybuffer',
        });

        const blobUrl = URL.createObjectURL(new Blob([res.response], { type: 'application/octet-binary' }));
        memo.set(url, blobUrl);

        return blobUrl;
    };

    let g_url = await get(urls[0]);

    const wait = (resolve) => {
        if (document.querySelector('[class^="chatContent"]')) return resolve();
        setTimeout(() => wait(resolve), 500);
    };

    await new Promise(resolve => wait(resolve));

    const setURL = () => {
        Object.assign(document.body.children[0].style, {
            'background-image': 'url("' + g_url + '")',
            'background-attachment': 'fixed',
            'background-position': 'center center',
            'background-size': 'cover',
            'background-repeat': 'no-repeat',
            'transition-duration': '1.5s'
        });
    };

    setURL();

    const setOther = () => {
        for (const v of document.querySelectorAll('*')) {
            v.style.backgroundColor = 'rgba(0, 0, 0, 0)';
        }
        document.body.children[0].children[3].style.backgroundColor = 'rgba(0, 0, 0, 0.7)';

        const aplicarTransparencia = () => {
            const embeds = document.querySelectorAll('.embed');
            embeds.forEach(embed => {
                embed.style.backgroundColor = 'rgba(0, 0, 0, 0.5)';
                embed.style.backdropFilter = 'blur(10px)';
            });

            const embedContents = document.querySelectorAll('.embed .embed-content');
            embedContents.forEach(content => {
                content.style.backgroundColor = 'rgba(0, 0, 0, 0.3)';
            });

            const attachments = document.querySelectorAll('.attachment');
            attachments.forEach(attachment => {
                attachment.style.backgroundColor = 'rgba(0, 0, 0, 0.5)';
                attachment.style.backdropFilter = 'blur(10px)';
            });
        };

        const observeEmbeds = () => {
            const observer = new MutationObserver(mutations => {
                aplicarTransparencia();
            });

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

            setInterval(() => {
                aplicarTransparencia();
            }, 50); // Verificação a cada 50ms
        };

        observeEmbeds();

        aplicarTransparencia();
    };

    setOther();

    let _url = location.href;
    let _time = 0;
    let index = 0;

    const update = async () => {
        const time = performance.now();

        if (time - _time > intervalTime) {
            g_url = await get(urls[(++index) % urls.length]);
            _time = performance.now();
            setURL();
        } else {
            const url = location.href;
            if (url !== _url) {
                _url = url;
                setOther();
            }
        }

        requestAnimationFrame(update);
    };

    update();
})(window.unsafeWindow || window);