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/* 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
/* globals browser */
if (!window.smartblockTestShimInitialized) {
// Guard against this script running multiple times
window.smartblockTestShimInitialized = true;
const SHIM_ID = "EmbedTestShim";
// Original URL of the test embed script.
const ORIGINAL_URL =
// Use instagram logo as a test logo
let originalEmbedContainers = document.querySelectorAll(
".broken-embed-content"
);
let embedPlaceholders = [];
function sendMessageToAddon(message) {
return browser.runtime.sendMessage({ message, shimId: SHIM_ID });
}
function addonMessageHandler(message) {
let { topic, shimId } = message;
// Only react to messages which are targeting this shim.
if (shimId != SHIM_ID) {
return;
}
if (topic === "smartblock:unblock-embed") {
// remove embed placeholders
embedPlaceholders.forEach((p, idx) => {
p.replaceWith(originalEmbedContainers[idx]);
});
// recreate scripts
let scriptElement = document.createElement("script");
// Set the script element's src with the website's principal instead of
// the content script principal to ensure the tracker script is not loaded
// via the content script's expanded principal.
scriptElement.wrappedJSObject.src = ORIGINAL_URL;
document.body.appendChild(scriptElement);
}
}
async function createShimPlaceholders() {
const [titleString, descriptionString, buttonString] =
await sendMessageToAddon("smartblockGetFluentString");
originalEmbedContainers.forEach(originalEmbedContainer => {
// this string has to be defined within this function to avoid linting errors
const SMARTBLOCK_PLACEHOLDER_HTML_STRING = `
<style>
#smartblock-placeholder-wrapper {
min-height: 225px;
width: 400px;
padding: 32px 24px;
display: block;
align-content: center;
text-align: center;
background-color: light-dark(rgb(255, 255, 255), rgb(28, 27, 34));
color: light-dark(rgb(43, 42, 51), rgb(251, 251, 254));
border-radius: 8px;
border: 2px dashed #0250bb;
font-size: 14px;
line-height: 1.2;
font-family: system-ui;
}
#smartblock-placeholder-button {
min-height: 32px;
padding: 8px 14px;
border-radius: 4px;
font-weight: 600;
border: 0;
/* Colours match light/dark theme from
background-color: light-dark(rgb(0, 97, 224), rgb(0, 221, 255));
color: light-dark(rgb(251, 251, 254), rgb(43, 42, 51));
}
#smartblock-placeholder-button:hover {
/* Colours match light/dark theme from
background-color: light-dark(rgb(2, 80, 187), rgb(128, 235, 255));
}
#smartblock-placeholder-button:hover:active {
/* Colours match light/dark theme from
background-color: light-dark(rgb(5, 62, 148), rgb(170, 242, 255));
}
#smartblock-placeholder-title {
margin-block: 14px;
font-size: 16px;
font-weight: bold;
}
#smartblock-placeholder-desc {
margin-block: 14px;
}
</style>
<div id="smartblock-placeholder-wrapper">
<img id="smartblock-placeholder-image" width="24" height="24" />
<p id="smartblock-placeholder-title"></p>
<p id="smartblock-placeholder-desc"></p>
<button id="smartblock-placeholder-button"></button>
</div>`;
// Create the placeholder inside a shadow dom
const placeholderDiv = document.createElement("div");
embedPlaceholders.push(placeholderDiv);
// Tag the div with a class to make it easily detectable FOR THE TEST SHIM ONLY
placeholderDiv.classList.add("shimmed-embedded-content");
const shadowRoot = placeholderDiv.attachShadow({ mode: "closed" });
shadowRoot.innerHTML = SMARTBLOCK_PLACEHOLDER_HTML_STRING;
shadowRoot.getElementById("smartblock-placeholder-image").src = LOGO_URL;
shadowRoot.getElementById("smartblock-placeholder-title").textContent =
titleString;
shadowRoot.getElementById("smartblock-placeholder-desc").textContent =
descriptionString;
shadowRoot.getElementById("smartblock-placeholder-button").textContent =
buttonString;
// Wait for user to opt-in.
shadowRoot
.getElementById("smartblock-placeholder-button")
.addEventListener("click", ({ isTrusted }) => {
if (!isTrusted) {
return;
}
// Send a message to the addon to allow loading TikTok tracking resources
// needed by the embed.
sendMessageToAddon("embedClicked");
});
// Replace the embed with the placeholder
originalEmbedContainer.replaceWith(placeholderDiv);
sendMessageToAddon("smartblockEmbedReplaced");
});
// Dispatch event to signal that the script is done replacing FOR TEST SHIM ONLY
const finishedEvent = new CustomEvent("smartblockEmbedScriptFinished", {
bubbles: true,
composed: true,
});
window.dispatchEvent(finishedEvent);
}
// Listen for messages from the background script.
browser.runtime.onMessage.addListener(request => {
addonMessageHandler(request);
});
createShimPlaceholders();
}