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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* globals exportFunction */
"use strict";
/**
* Blogger powered blogs rely on storage access to https://blogger.com to enable
* oauth with Google. For dFPI, sites need to use the Storage Access API to gain
* first party storage access. This shim calls requestStorageAccess on behalf of
* the site when a user wants to log in via oauth.
*/
console.warn(
`When using oauth, Firefox calls the Storage Access API on behalf of the site. See https://bugzilla.mozilla.org/show_bug.cgi?id=1776869 for details.`
);
const GOOGLE_OAUTH_PATH_PREFIX = "https://accounts.google.com/ServiceLogin";
// After permission was granted request (use) storage access and reload
async function requestGrantedAccess() {
const storageAccessPermission = await navigator.permissions.query({
name: "storage-access",
});
const hasStorageAccess = await document.hasStorageAccess();
if (storageAccessPermission.state === "granted" && !hasStorageAccess) {
await document.requestStorageAccess();
location.reload();
}
}
requestGrantedAccess();
// Overwrite the window.open method so we can detect oauth related popups.
const origOpen = window.wrappedJSObject.open;
Object.defineProperty(window.wrappedJSObject, "open", {
value: exportFunction((url, ...args) => {
// Filter oauth popups.
if (!url.startsWith(GOOGLE_OAUTH_PATH_PREFIX)) {
return origOpen(url, ...args);
}
// Request storage access for the Blogger iframe.
document.requestStorageAccess().then(() => {
origOpen(url, ...args);
});
// We don't have the window object yet which window.open returns, since the
// sign-in flow is dependent on the async storage access request. This isn't
// a problem as long as the website does not consume it.
return null;
}, window),
});
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