嗶哩嗶哩直播烙賽封鎖彈幕標記小幫手

在B站直播發送彈幕時，被封鎖的彈幕會被標紅並劃線。
目前為 2022-10-21 提交的版本，檢視最新版本。
安裝腳本 ?
Wrap lines
// ==UserScript==
// @name                Bilibili Live Banned Danmaku Marker
// @name:zh-CN          哔哩哔哩直播 被吞敏感弹幕 标记提示
// @name:zh-TW          嗶哩嗶哩直播 烙賽封鎖彈幕 標記小幫手
// @description         When sending a danmaku, the banned danmaku will be marked red and add strikethrough line.
// @description:zh-CN   在B站直播发送弹幕时，被吞的弹幕会被标红并划线。
// @description:zh-TW   在B站直播發送彈幕時，被封鎖的彈幕會被標紅並劃線。
// @version             0.1
// @author              Yulon
// @namespace           https://github.com/yulon
// @icon                https://www.bilibili.com/favicon.ico
// @license             MIT
// @match               *://live.bilibili.com/*
// @grant               unsafeWindow
// @run-at              document-start
// ==/UserScript==

(function() {
    'use strict';

    var xhrPt = unsafeWindow.XMLHttpRequest.prototype
    const xhrPtOpen = xhrPt.open
    const xhrPtSend = xhrPt.send

    function parseJson(t) {
        if (!t || t.length === 0) {
            return null
        }
        try {
            return JSON.parse(t)
        } catch (e) {
            return null
        }
    }

    function getContent(r) {
        if (
            r &&
            (('msg' in r && r.msg === 'f') || ('message' in r && r.message === 'f')) &&
            'data' in r && 'mode_info' in r.data && 'extra' in r.data.mode_info
        ) {
            const extra = parseJson(r.data.mode_info.extra)
            if (extra && 'content' in extra) {
                return extra.content
            }
        }
        return null
    }

    function checkContent(r) {
        const cont = getContent(r)
        if (!cont) {
            return
        }
        ;(function lineThrough() {
            const danmakus = document.querySelectorAll('#chat-items .danmaku-item-right')
            for (let danmaku of danmakus) {
                if (danmaku.innerText === cont) {
                    const danmakuItem = danmaku.parentElement
                    danmakuItem.style.textDecoration = 'line-through'
                    danmakuItem.style.color = 'red'
                    const userName = danmakuItem.querySelector('.user-name')
                    if (userName) {
                        userName.style.color = 'red'
                    }
                    return
                }
            }
            setTimeout(lineThrough, 500)
        })()
    }

    xhrPt.open = function(method, url, async, user, password) {
        this._isSendDanmaku = url.endsWith('api.live.bilibili.com/msg/send')
        return xhrPtOpen.apply(this, arguments)
    }

    const onreadystatechangeHook = function() {
        if (this.readyState === 4 && this.status === 200) {
			checkContent(parseJson(this.responseText))
		}
        return this._original_onreadystatechange.apply(this, arguments)
    }

    xhrPt.send = function() {
        if ('_isSendDanmaku' in this && this._isSendDanmaku) {
            this._original_onreadystatechange = this.onreadystatechange
            this.onreadystatechange = onreadystatechangeHook
        }
        return xhrPtSend.apply(this, arguments)
    }

    const fetch = unsafeWindow.fetch

    unsafeWindow.fetch = function(url) {
        const prm = fetch.apply(this, arguments)
        if (!url.endsWith('api.live.bilibili.com/msg/send')) {
            return prm
        }
        return prm.then((resp) => {
            return resp.json().then((r) => {
                checkContent(r)
                resp.json = function() {
                    return Promise.resolve(r)
                }
                resp.text = function() {
                    return Promise.resolve(JSON.stringify(r))
                }
                return resp
            })
        })
    }
})();
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