Live Mathletics Bot

bot.js

/* eslint-disable require-jsdoc */
(() => {
    function injectScript(src) {
        return new Promise((resolve, reject) => {
            const script = document.createElement("script")
            script.async = true
            script.src = src
            script.addEventListener("load", resolve)
            script.addEventListener("error", () => reject(new Error("Error loading script.")))
            script.addEventListener("abort", () => reject(new Error("Script loading aborted.")))
            document.head.appendChild(script)
        })
    }

    function start() {
        const question = $("body > div.stage > ui-view > div > div.gameQuestionSection > div.livemathLightBlueBG.gameQuestionBlock > div.question-input-div.ng-scope > aligned-question > div > form > div")
        const answer = $("body > div.stage > ui-view > div > div.gameQuestionSection > div.livemathLightBlueBG.gameQuestionBlock > div.question-input-div.ng-scope > aligned-question > div > form > div > input")
        setInterval(() => {
            let q = question.text()
            const blankMiddle = q.trim().match(/(.+) \+    = (.+)/)
            if (blankMiddle[1]) answer.val(math.eval(`${blankMiddle[2]} - ${blankMiddle[1]}`))
            else {
                q = q.replace("=", "")
                q = q.replace("÷", "/")
                q = q.replace("×", "*")
                q = q.replace(/Half of (\d+)/, "$1 / 2")
                answer.val(math.eval(q))
            }
            const event = document.createEvent("HTMLEvents")
            event.initEvent("change", true, false)
            answer.get(0).dispatchEvent(event)
            const e = jQuery.Event("keypress")
            e.which = 13
            e.keyCode = 13
            question.trigger(e)
        }, 100)
    }

    let numLoaded = 0

    function scriptLoaded() {
        numLoaded++
        if (numLoaded === 2) start()
    }

    try {
        math
        scriptLoaded()
    } catch (e) {
        injectScript("https://cdnjs.cloudflare.com/ajax/libs/mathjs/5.10.3/math.min.js").then(scriptLoaded)
    }

    if (!$.Event) injectScript("https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.slim.min.js").then(scriptLoaded)
    else scriptLoaded()
})()