polyplus/js/forum/forum-view.js

const ForumText = document.querySelectorAll('p:not(.text-muted):not(.mb-0)')

var Settings = []
chrome.storage.sync.get(['PolyPlus_Settings'], function(result) {
    Settings = result.PolyPlus_Settings || {
        ForumMentsOn: false,
        ForumUnixStampsOn: false
    }

    if (Settings.ForumMentsOn === true) {
        ForumMentions()
    }

    if (Settings.ForumUnixStampsOn === true) {
        ForumUnixTimestamps()
    }
});

function ForumMentions() {
    const Regex = /@([\w.]+)/g

    for (let text of ForumText) {
        let FormattedText = text.innerHTML
        let match;
        while ((match = Regex.exec(text.innerText)) !== null) {
            const Username = match[0].substring(1)
            FormattedText = FormattedText.replaceAll(match[0], `<a href="/users/@${Username}?ref=${encodeURIComponent(window.location.pathname)}" class="polyplus-mention">${match[0]}</a>`)
        }
        text.innerHTML = FormattedText
    }
}

function ForumUnixTimestamps() {
    const Regex = /&lt;t:[A-Za-z0-9]+&gt;/i

    for (let text of ForumText) {
        let FormattedText = text.innerHTML
        let match;

        while ((match = Regex.exec(FormattedText)) !== null) {
            const Timestamp = new Date(match[0].substring(6, match[0].length - 4) * 1000)
            const Months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

            const Distance = new Intl.RelativeTimeFormat({numeric: 'auto', style: 'short'}).format(Math.floor((Timestamp - new Date()) / (60 * 1000)), 'day')
            const Result = `<code style="color: orange;">${Months[Timestamp.getMonth()]} ${Timestamp.getDate()}, ${Timestamp.getFullYear()} (${["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"][Timestamp.getDay()-1]}) at ${Timestamp.getHours()-12}:${String(Timestamp.getMinutes()).padStart(2, "0")} (${Distance})</code>`
            FormattedText = FormattedText.replaceAll(match[0], Result)
            console.log(FormattedText)
        }
        text.innerHTML = FormattedText
    }
}