Add/Edit: add Last Service button to some dates

Add a button that sets its to the closest past Sunday or Wednesday, in the fields that are usually set to last service.
נכון ליום 04-11-2025. ראה הגרסה האחרונה.
שאל שאלה, פרסם ביקורת, או דווח על הסקריפט.
Wrap lines
// ==UserScript==
// @name         Add/Edit: add Last Service button to some dates
// @namespace    https://github.com/nate-kean/
// @version      2025.11.4
// @description  Add a button that sets its to the closest past Sunday or Wednesday, in the fields that are usually set to last service.
// @author       Nate Kean
// @match        https://jamesriver.fellowshiponego.com/members/edit/*
// @match        https://jamesriver.fellowshiponego.com/members/add*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=fellowshiponego.com
// @grant        none
// @license      MIT
// ==/UserScript==

(async function() {
    document.head.insertAdjacentHTML("beforeend", `
        <style id="nates-day-button-css">
            .nates-day-button {
                float: right;
                font-weight: 600;
                border: none;
                font-size: 13px;
                margin-top: -2px;
                padding: 0;
            }

            .dates-panel .date-section {
                max-width: 700px !important;

                & .date-holder {
                    width: 225px !important;

                    & label {
                        width: unset !important;
                    }

                    & .input-holder {
                        width: 100%;
                    }
                }
            }
        </style>
    `);

    const fieldNames = [
        "First Visit Date",
        "Baptized",
        "Salvation Date",
        "Rededication Date",
    ];

    function delay(ms) {
        return new Promise((resolve) => setTimeout(resolve, ms));
    }

	const Day = Object.freeze({
		SUNDAY: 0,
		MONDAY: 1,
		TUESDAY: 2,
		WEDNESDAY: 3,
		THURSDAY: 4,
		FRIDAY: 5,
		SATURDAY: 6,
	});

	function getLastWeekday(targetDate, day) {
		const currentWeekday = targetDate.getDay();
		const daysToSubtract = (currentWeekday - day + 7) % 7;
		const lastWeekdayDate = new Date(targetDate);
		lastWeekdayDate.setDate(targetDate.getDate() - daysToSubtract);
		return lastWeekdayDate;
	}

    function getDateString() {
        const today = new Date();
        const lastSunday = getLastWeekday(today, Day.SUNDAY);
        const lastWednesday = getLastWeekday(today, Day.WEDNESDAY);
        const lastServiceDate = Math.max(lastSunday, lastWednesday)
        return new Intl.DateTimeFormat("en-US", {
            month: "2-digit",
            day: "2-digit",
            year: "numeric",
        }).format(lastServiceDate);
    }

    for (const formGroup of document.querySelectorAll(".form-group")) {
        if (!fieldNames.includes(formGroup.querySelector("label")?.textContent.trim())) {
            continue;
        }
        const btn = document.createElement("button");
        btn.classList.add("nates-day-button");
        btn.textContent = "Last Service";
        btn.type = "button";
        btn.addEventListener("click", () => {
            formGroup.querySelector("input").value = getDateString();
        }, { passive: true });
        formGroup.prepend(btn);
    }
})();