twitter localize dates

convert mentions of dates/times in tweet to local
As of 2024-04-09. See the latest version.
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// ==UserScript==
// @name         twitter localize dates
// @namespace    http://tampermonkey.net/
// @version      2024-04-04-2
// @description  convert mentions of dates/times in tweet to local
// @author       You
// @match        https://twitter.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=twitter.com
// @grant        none
// @license MIT
// ==/UserScript==


// https://www.ge.com/digital/documentation/workflow/r_wf_time_zone_abbreviations_for_date_and_time_functions.html
        const timeZoneMap = {
            ET: "EST",
            PT: "PST"
        }


/**
         * @param {string} str
         */
        function parseTime(str) {
            const timeStrMatch = str.match(/(?<time>[0-9][0-9]?(:[0-9][0-9])?)(?<offset>(a|p|A|P)(m|M))? +(?<timezone>[a-zA-Z]*)/)
            let timeStr = timeStrMatch?.groups?.time
            let timeZone = timeStrMatch?.groups?.timezone
            if(timeStr && timeZone) {
                const today = new Date().toISOString().split("T")[0]
                if(!timeStr.includes(":")) {
                    timeStr += ":00"
                }

                timeZone = timeZoneMap[timeZone.toUpperCase()] ?? timeZone

                return new Date(`${today} ${timeStr} ${timeStrMatch?.groups.offset ?? ''} ${timeZone}`)
            }

            return null
        }





        window.addEventListener("mousemove", e => {
            if(e.target instanceof HTMLElement) {
                const tweet = e.target.closest('[data-testid="cellInnerDiv"]')
                if(tweet && tweet instanceof HTMLElement) {
                    const text = tweet.querySelector('[data-testid="tweetText"]')?.textContent.trim();
                    if(text) {
                        const parseddate = parseTime(text)
                        if(parseddate && !isNaN(+parseddate)) {
                            tweet.title = parseddate.toLocaleTimeString()
                        }
                    }
                }
            }
        })