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/*
* rsvp.js -- Simple web-based RSVP tool.
* Copyright © 2022 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 addEntry = document.getElementById("add-entry");
const removeEntry = document.getElementById("remove-entry");
const submitButton = document.getElementById("submit-form");
const form = document.getElementById("rsvp-input");
// Parse out the HTML form into something we can send to the backend.
function submitForm() {
let data = new FormData(form);
if (data.get("name").trim().length == 0) {
alert("You have to provide something for \"Name\".");
return;
} else if (data.get("rsvp") === null) {
alert("You have to choose an option for \"RSVP Status\".");
return;
}
let res = { guests: [] };
if (urlParams.get("i")) {
res["id"] = urlParams.get("i");
} else if (urlParams.get("r")) {
res["update"] = urlParams.get("r");
}
for (let pair of data.entries()) {
if (pair[0].startsWith("guest-")) {
res.guests.push(pair[1]);
} else if (pair[0] === "rsvp") {
const radioButtons = document.querySelectorAll('input[name="rsvp"]');
for (const radioButton of radioButtons) {
if (radioButton.checked) {
res.rsvp = radioButton.id;
break;
}
}
} else {
res[pair[0]] = pair[1];
}
}
res.guests = res.guests.join(",");
let xhr = new XMLHttpRequest();
xhr.open("POST", `${location.protocol}//${location.host}/api/rsvp`);
xhr.send(JSON.stringify(res));
xhr.onload = function(data) {
if (xhr.status != 200) {
alert("Failed to submit form.");
} else {
document.getElementById("rsvp").innerHTML = "";
let resp = JSON.parse(xhr.response);
let elem = document.createElement("p");
elem.innerHTML = "Thanks for registering! Please bookmark or save the following link:";
document.getElementById("rsvp").appendChild(elem);
elem = document.createElement("a");
elem.href = [location.protocol, '//', location.host, location.pathname].join('') + `?r=${resp.receipt}`;
elem.textContent = elem.href;
document.getElementById("rsvp").appendChild(elem);
elem = document.createElement("p");
elem.innerHTML = "This will enable you to edit your RSVP later.";
document.getElementById("rsvp").appendChild(elem);
}
}
xhr.onerror = function(error) {
throw new Error(`Request failed: ${error}`);
}
}
// Immediately send off an XHR to load info from the backend.
const urlParams = new URLSearchParams(window.location.search);
if (!urlParams.get("i") && !urlParams.get("r")) {
document.getElementById("loading").remove();
let elem = document.createElement("p");
elem.innerHTML = "No invitation code provided.";
document.getElementById("rsvp").appendChild(elem);
} else {
let xhr = new XMLHttpRequest();
if (urlParams.get("i")) {
xhr.open("GET", `${location.protocol}//${location.host}/api/rsvp/event-info?i=${urlParams.get("i")}`);
} else {
xhr.open("GET", `${location.protocol}//${location.host}/api/rsvp/event-info?r=${urlParams.get("r")}`);
}
xhr.send();
xhr.onload = function(data) {
document.getElementById("loading").remove();
if (xhr.status != 200) {
let elem = document.createElement("p");
elem.innerHTML = "Invalid invitation code.";
document.getElementById("rsvp").appendChild(elem);
} else {
document.getElementById("rsvp-input").hidden = false;
let response = JSON.parse(xhr.response);
let elem = document.createElement("h1");
elem.innerHTML = response.title;
document.getElementById("event-info").appendChild(elem);
if (response.image !== "#f") {
elem = document.createElement("img");
elem.src = `data:image/png;base64,${response.image}`;
elem.style = "float: right; max-size: 200px; margin: 16px;";
document.getElementById("event-info").appendChild(elem);
}
elem = document.createElement("p");
elem.innerHTML = `Where: ${response.location}`;
document.getElementById("event-info").appendChild(elem);
elem = document.createElement("p");
elem.innerHTML = `When: ${response.date}`;
document.getElementById("event-info").appendChild(elem);
elem = document.createElement("p");
elem.innerHTML = response.description;
document.getElementById("event-info").appendChild(elem);
if (response.hasOwnProperty("rsvps")) {
elem = document.createElement("h2");
elem.innerHTML = "Current RSVPs";
document.getElementById("rsvp-global").appendChild(elem);
elem = document.createElement("table");
document.getElementById("rsvp-global").appendChild(elem);
for (let rsvp of response.rsvps) {
let container = document.createElement("tr");
let field = document.createElement("td");
field.textContent = rsvp.name;
container.append(field);
field = document.createElement("td");
field.textContent = rsvp.email;
container.append(field);
field = document.createElement("td");
field.textContent = rsvp.guests.replaceAll(',', ', ');
container.append(field);
field = document.createElement("td");
field.textContent = rsvp.attending;
container.append(field);
elem.appendChild(container);
}
}
// Pre-filled info if this is an edit.
if (response.hasOwnProperty("name")) {
document.getElementById("name").value = response.name;
}
if (response.hasOwnProperty("email")) {
document.getElementById("email").value = response.email;
}
if (response.hasOwnProperty("attending")) {
document.getElementById(response.attending).checked = true;
}
if (response.hasOwnProperty("guests") && response.guests.trim() != "") {
let i = 0;
for (let guest of response.guests.split(",")) {
let elem = document.createElement("input");
elem.type = "text";
elem.name = `guest-${i}`;
elem.value = guest;
guestView.appendChild(elem);
i++;
}
}
}
}
xhr.onerror = function(error) {
throw new Error(`Request failed: ${error}`);
}
}
// Attach event listeners to the UI.
submitButton.addEventListener("click", submitForm);
submitButton.addEventListener("submit", submitForm);
addEntry.addEventListener("click", () => {
let i = guestView.childNodes.length;
let elem = document.createElement("input");
elem.type = "text";
elem.name = `guest-${i}`;
guestView.appendChild(elem);
});
removeEntry.addEventListener("click", () => {
if (guestView.lastChild) {
guestView.lastChild.remove();
}
});
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