47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* global MPShowMessage, MPIsEnabled, MPToggleLights */
|
|
|
|
"use strict";
|
|
|
|
// decode a 16-bit string in which only one byte of each
|
|
// 16-bit unit is occupied, to UTF-8. This is necessary to
|
|
// comply with `btoa` API constraints.
|
|
function fromBinary(encoded) {
|
|
const binary = atob(decodeURIComponent(encoded));
|
|
const bytes = new Uint8Array(binary.length);
|
|
for (let i = 0; i < bytes.length; i++) {
|
|
bytes[i] = binary.charCodeAt(i);
|
|
}
|
|
return String.fromCharCode(...new Uint16Array(bytes.buffer));
|
|
}
|
|
|
|
function decodeMessageFromUrl() {
|
|
const url = new URL(document.location.href);
|
|
|
|
if (url.searchParams.has("json")) {
|
|
const encodedMessage = url.searchParams.get("json");
|
|
|
|
return fromBinary(encodedMessage);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
// Light switch things
|
|
document.addEventListener("DOMContentLoaded", () => {
|
|
document
|
|
.querySelector("#light-switch")
|
|
.addEventListener("click", MPToggleLights);
|
|
});
|
|
|
|
const message = decodeMessageFromUrl();
|
|
|
|
if (message) {
|
|
// If message preview is enabled, show the message.
|
|
if (MPIsEnabled()) {
|
|
MPShowMessage(message);
|
|
}
|
|
}
|