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Wanikani Forums: Roll 6d6

Adds a button to post @WaniMeKani roll 6d6

// ==UserScript==
// @name         Wanikani Forums: Roll 6d6
// @namespace    http://tampermonkey.net/
// @version      1.2.1
// @description  Adds a button to post @WaniMeKani roll 6d6
// @author       Kumirei
// @include      https://community.wanikani.com*
// @require      https://greasyfork.org/scripts/432418-wait-for-selector/code/Wait%20For%20Selector.js?version=981655
// @grant        none
// ==/UserScript==

;(function (wfs) {
    let last_roll = Date.now()
    wfs.wait('.topic-footer-main-buttons', (e) => {
        var btn = document.createElement('button')
        btn.className = 'btn widget-button no-text btn-icon'
        btn.title = 'Click to roll 6d6'
        btn.innerHTML = 'Roll 6d6'
        btn.onclick = roll
        e.prepend(btn)
    })

    function roll() {
        document.querySelector('button.create:not(.reply)').click()
        var interval = setInterval(async function () {
            let composer = document.querySelector('textarea.d-editor-input')
            if (composer) {
                composer.value = `@WaniMeKani roll 6d6`
                composer.dispatchEvent(new Event('change', { bubbles: true, cancelable: true }))
                clearInterval(interval)
                await new Promise((res, rej) => setTimeout(res, 6000 - (Date.now() - last_roll)))
                document.querySelector('.submit-panel button.create').click()
                last_roll = Date.now()
            }
        }, 100)
    }

    document.addEventListener('keydown', (e) => {
        if (e.altKey && (e.keyCode == 102 || e.keyCode == 54)) roll()
        if (e.altKey && e.shiftKey && e.keyCode == 68) roll()
        if (e.altKey && e.ctrlKey && e.keyCode == 68) roll()
    })
})(window.wfs)