gh-pr-approvals.user.js

// ==UserScript==
// @name         GH-PR-Approvals
// @namespace    http://serokell.io
// @version      0.5
// @updateURL    https://gist.githubusercontent.com/yorickvP/e69775e5b8997054103b855aea4103aa/raw/
// @description  adds approval count to github PRs
// @author       You
// @match        https://github.com/*
// @run-at       document-start
// @grant unsafeWindow
// ==/UserScript==
/* jshint esnext: false, asi: true */
/* jshint esversion: 6 */

const matchers = []
function checkShouldRun(location=window.location.href) {
    matchers.forEach(({regex, on, off}) => {
        if(!!regex.exec(location))
            on(location)
        else off(location)
    })
}
matchers.push({
    regex: /^https:\/\/github.com\/serokell\/[a-zA-Z0-9-]+(\/pull.*|\/commit.*|)/,
    on: ()=> observer.observe(document, { subtree: true, childList: true, attributes: false }),
    off: ()=> observer.disconnect()
})

const oldPushState = unsafeWindow.history.pushState

unsafeWindow.history.pushState = function(state, name, url) {
    checkShouldRun(url)
    oldPushState.apply(this, arguments)
}

const issue_regex = /([\s\[\(]|^)((OPS|AD|SD)-\d+)([\s$\]\)])/gi

const selector = "a.muted-link.tooltipped[aria-label$=\"approval\"],a.muted-link.tooltipped[aria-label$=\"approvals\"]"
const observer = new MutationObserver(unbounce(visitall))
function visitall() {
    //const t0 = performance.now()
    visitall_selectorlist([".js-issue-row", selector], elem => {
        if (elem.textContent.trim() == "Approved") {
            elem.textContent = "Approved by " + elem.getAttribute("aria-label").match(/(\d+) review/)[1]
        }
    })
    visitall_selectorlist([".js-issue-row", "a.h4"], replace_issues)
    visitall_selectorlist([".js-issue-title"], replace_issues)
    visitall_selectorlist([".markdown-body", "p"], replace_issues)
    visitall_selectorlist(["a.message"], replace_issues)
    visitall_selectorlist(["p.commit-title"], replace_issues)
    visitall_selectorlist([".ghpr-stop-click"], elem => {
        // stop github's onclick handler
        elem.onclick = event => event.stopPropagation()
    })
    //const t1 = performance.now()
    //console.log("took", (t1-t0), "ms")
}
function replace_issues(elem) {
    if (elem.className == "message") console.log(elem)
    if (issue_regex.exec(elem.innerHTML) && elem.children.length == 0) {
        // onclick in html gets blocked by CSP, add a classname
        var nw = elem.innerHTML.replace(issue_regex, "$1<a href=https://issues.serokell.io/issue/$2 target=_blank class=ghpr-stop-click style=color:blue>$2</a>$4")
        elem.innerHTML = nw
    }
}
function unbounce(fun, delay=100) {
    // only call function every x milliseconds
    let timeout
    return function() {
        if (timeout) return
        timeout = setTimeout(x=> {
            timeout = null
            fun.apply(this, arguments)
        }, delay)
    }
}
function qsa_optim(n, x) {
    // queryselectorall is way slower than getElementsByClassName and getElementById in trivial cases
    if      (x.match(/^\.[a-zA-Z-]$/)) return n.getElementsByClassName(x.slice(1))
    else if (x.match(/^#[a-zA-Z-]$/))  return [n.getElementById(x.slice(1))]
    else return n.querySelectorAll(x)
}
function visitall_selectorlist([s, ...sels], fun, root=document) {
    // DFS on selector list
    if (!s) fun(root)
    else for (const node of qsa_optim(root, s)) {
        visitall_selectorlist(sels, fun, node)
    }
}

checkShouldRun()