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/*
* comment-reaction.js -- Simple emoji picker and glue for reaction endpoint
* 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/>.
*/
function encodeAsFormData(obj) {
// Turn the data object into an array of URL-encoded key/value pairs.
let urlEncodedDataPairs = [];
for (let key in obj) {
urlEncodedDataPairs.push(encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]));
}
return urlEncodedDataPairs.join('&');
}
function postReaction(reaction, callback) {
let xhr = new XMLHttpRequest();
xhr.open('POST', "/api/comment/react", true);
// Endpoint expects HTML form data.
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.onload = function(data) {
switch (xhr.status) {
case 200:
callback();
break;
case 429:
alert("Failed -- you can react at most once an hour.");
break;
default:
let resp = JSON.parse(xhr.response);
alert("Failed -- " + resp.error);
break;
}
}
xhr.onerror = function(error) {
throw new Error(`Request failed: ${error}`);
}
xhr.send(encodeAsFormData(reaction));
}
function selectorWidgetName(id) {
return `emoji-picker-${id}`;
}
// Simple Emoji picker widget.
function selectorWidget(id) {
function emojiButton(codepoint) {
let span = document.createElement("span");
span.innerHTML = String.fromCodePoint(codepoint);
return span;
}
let selector = document.createElement("div");
selector.setAttribute("id", selectorWidgetName(id));
selector.setAttribute("class", "emoji-picker");
for (let i = 0x1F600; i < 0x1F64F; i++) {
selector.appendChild(emojiButton(i));
}
selector.appendChild(emojiButton(0x1F37B));
selector.appendChild(emojiButton(0x1F440));
selector.appendChild(emojiButton(0x1F446));
selector.appendChild(emojiButton(0x1F447));
selector.appendChild(emojiButton(0x1F448));
selector.appendChild(emojiButton(0x1F449));
selector.appendChild(emojiButton(0x1F450));
selector.appendChild(emojiButton(0x270A));
selector.appendChild(emojiButton(0x270B));
selector.appendChild(emojiButton(0x270C));
selector.appendChild(emojiButton(0x270D));
for (let i = 0x1F90C; i < 0x1F9FF; i++) {
selector.appendChild(emojiButton(i));
}
return selector;
}
// Add a "react" button to every local comment.
window.addEventListener("load", () => {
// First pass to add a separator for the buttons.
let replyButtons = document.querySelectorAll(".comment-reply-button");
for (let button of replyButtons) {
let parent = button.parentNode;
parent.innerHTML += " - ";
}
// Second pass to add the actual "react" button.
replyButtons = document.querySelectorAll(".comment-reply-button");
for (let button of replyButtons) {
let id = button.getAttribute("data-reply-to-id");
let reactButton = document.createElement("a");
reactButton.setAttribute("class", "comment-react-button");
reactButton.setAttribute("href", "#");
reactButton.setAttribute("data-react-to-id", id);
reactButton.innerHTML = "react";
button.parentNode.appendChild(reactButton);
reactButton.addEventListener('click', (e) => {
// If we already made a selector widget for this comment, let's "hide" the
// one that exists.
let existingSelectorWidget = document.getElementById(selectorWidgetName(id));
if (existingSelectorWidget !== null) {
existingSelectorWidget.remove();
e.preventDefault();
return;
}
let emojiPicker = selectorWidget(id);
button.parentNode.parentNode.insertBefore(emojiPicker, button.parentNode);
for (let button of emojiPicker.children) {
button.addEventListener('click', (e) => {
postReaction({
"id": reactButton.getAttribute("data-react-to-id"),
"reaction": button.innerHTML
}, () => {
let reactAcknowledgement = document.createElement("span");
reactAcknowledgement.innerHTML = "successfully reacted!"
reactButton.replaceWith(reactAcknowledgement);
});
emojiPicker.remove();
});
}
e.preventDefault();
});
}
});
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