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/*
 * rsvp-min.js -- UX improvements for static RSVP form page.
 * Copyright © 2023 Jakob L. Kreuze <zerodaysfordays@sdf.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 */

// Common nodes.
const guestView = document.getElementById("guest-view");
const guestList = document.getElementById("guest-list");
const addEntryButton = document.getElementById("add-entry");
const removeEntryButton = document.getElementById("remove-entry");

// Enable visual elements.
guestList.setAttribute("hidden", true);
addEntryButton.removeAttribute("hidden");
removeEntryButton.removeAttribute("hidden");

function updateGuestList() {
  guestList.value = guestView.childNodes.map((node) => node.value).join(",");
}

addEntry.addEventListener("click", () => {
  let i = guestView.childNodes.length;
  let elem = document.createElement("input");
  elem.type = "text";
  elem.name = `guest-${i}`;
  guestView.appendChild(elem);

  elem.addEventListener("input", updateGuestList);
});
removeEntry.addEventListener("click", () => {
  if (guestView.lastChild) {
    guestView.lastChild.remove();
  }
  updateGuestList();
});