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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/. */
export function URLDecorationAnnotationsService() {}
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
RemoteSettings: "resource://services-settings/remote-settings.sys.mjs",
});
const COLLECTION_NAME = "anti-tracking-url-decoration";
const PREF_NAME = "privacy.restrict3rdpartystorage.url_decorations";
URLDecorationAnnotationsService.prototype = {
classID: Components.ID("{5874af6d-5719-4e1b-b155-ef4eae7fcb32}"),
QueryInterface: ChromeUtils.generateQI([
"nsIObserver",
"nsIURLDecorationAnnotationsService",
]),
_initialized: false,
_prefBranch: null,
onDataAvailable(entries) {
// Use this technique in order to ensure the pref cannot be changed by the
// user e.g. through about:config. This preferences is only intended as a
// mechanism for reflecting this data to content processes.
if (this._prefBranch === null) {
this._prefBranch = Services.prefs.getDefaultBranch("");
}
const branch = this._prefBranch;
branch.unlockPref(PREF_NAME);
branch.setStringPref(
PREF_NAME,
entries.map(x => x.token.replace(/ /, "%20")).join(" ")
);
branch.lockPref(PREF_NAME);
},
observe(aSubject, aTopic) {
if (aTopic == "profile-after-change") {
this.ensureUpdated();
}
},
ensureUpdated() {
if (this._initialized) {
return Promise.resolve();
}
this._initialized = true;
const client = lazy.RemoteSettings(COLLECTION_NAME);
client.on("sync", event => {
let {
data: { current },
} = event;
this.onDataAvailable(current);
});
// Now trigger an update from the server if necessary to get a fresh copy
// of the data
return client.get({}).then(entries => {
this.onDataAvailable(entries);
return undefined;
});
},
};
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