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.

Aby zainstalować ten skrypt, wymagana jest instalacje jednego z następujących rozszerzeń: Tampermonkey, Greasemonkey lub Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

Aby zainstalować ten skrypt, wymagana jest instalacje jednego z następujących rozszerzeń: Tampermonkey, Violentmonkey.

Aby zainstalować ten skrypt, wymagana będzie instalacja rozszerzenia Tampermonkey lub Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

Aby zainstalować ten skrypt, musisz zainstalować rozszerzenie menedżera skryptów użytkownika.

(Mam już menedżera skryptów użytkownika, pozwól mi to zainstalować!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

Będziesz musiał zainstalować rozszerzenie menedżera stylów użytkownika, aby zainstalować ten styl.

Będziesz musiał zainstalować rozszerzenie menedżera stylów użytkownika, aby zainstalować ten styl.

Musisz zainstalować rozszerzenie menedżera stylów użytkownika, aby zainstalować ten styl.

(Mam już menedżera stylów użytkownika, pozwól mi to zainstalować!)

// ==UserScript==
// @name         Add/Edit: add Last Service button to some dates
// @namespace    https://github.com/nate-kean/
// @version      2025.12.8
// @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
// @run-at       document-end
// @require      https://update.greasyfork.org/scripts/554804/1689525/Nate%27s%20Day%20Button.js
// ==/UserScript==

(async function() {
    document.head.insertAdjacentHTML("beforeend", `
        <style id="nates-last-service-button-css">
            .dates-panel .date-section {
                max-width: 750px !important;

                & .nates-day-button.last-service {
                    float: right;
                    margin-top: -2px;
                }

                & .date-holder {
                    width: 250px !important;

                    & label {
                        width: unset !important;
                    }

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

    // Overrides
    const specialDates = [
        new Date("12/6/2025"), // James River Christmas Saturday 2025
    ];

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

	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 isSameDate(a, b) {
        return (
            a.getDate() === b.getDate()
            && a.getMonth() === b.getMonth()
            && a.getFullYear() === b.getFullYear()
        );
    }

    function getLastServiceDate(today, lastSunday, lastWednesday) {
        for (const date of specialDates) {
            if (
                today.getFullYear() === date.getFullYear()
                && today.getMonth() === date.getMonth()
                && today.getDate() === date.getDate()
            ) {
                return date;
            }
        }
        return new Date(Math.max(lastSunday, lastWednesday));
    }

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


    const today = new Date();
    const lastSunday = getLastWeekday(today, Day.SUNDAY);
    const lastWednesday = getLastWeekday(today, Day.WEDNESDAY);
    const lastServiceDate = getLastServiceDate(today, lastSunday, lastWednesday);
    const buttonName = (isSameDate(today, lastServiceDate)) ? "Today" : "Last Service";
    const dateString = new Intl.DateTimeFormat("en-US", {
        month: "2-digit",
        day: "2-digit",
        year: "numeric",
    }).format(lastServiceDate);

    const yesterday = new Date();
    yesterday.setDate(yesterday.getDate() - 1);
    const dateStringYesterday = new Intl.DateTimeFormat("en-US", {
        month: "2-digit",
        day: "2-digit",
        year: "numeric",
    }).format(yesterday);

    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", "last-service");
        btn.textContent = buttonName;
        btn.type = "button";
        btn.addEventListener("click", () => {
            formGroup.querySelector("input").value = dateString;
        }, { passive: true });
        formGroup.prepend(btn);
    }

    // TODO: use MutationObserver
    while (true) {
        for (const row of document.querySelectorAll(".memberEditGroupName > :nth-child(2 of div)")) {
            if (row.classList.contains("has-last-service-button")) continue;
            row.classList.add("has-last-service-button");

            const btn = document.createElement("button");
            btn.classList.add("nates-day-button", "last-service");
            btn.textContent = buttonName;
            btn.type = "button";
            btn.addEventListener("click", () => {
                row.querySelector("input").value = dateString;
            }, { passive: true });
        }
        await delay(100);
    }
})();