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-rw-r--r--services/fxaccounts/FxAccountsProfile.sys.mjs193
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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/. */
+
+/**
+ * Firefox Accounts Profile helper.
+ *
+ * This class abstracts interaction with the profile server for an account.
+ * It will handle things like fetching profile data, listening for updates to
+ * the user's profile in open browser tabs, and cacheing/invalidating profile data.
+ */
+
+import {
+ ON_PROFILE_CHANGE_NOTIFICATION,
+ log,
+} from "resource://gre/modules/FxAccountsCommon.sys.mjs";
+
+import { getFxAccountsSingleton } from "resource://gre/modules/FxAccounts.sys.mjs";
+
+const fxAccounts = getFxAccountsSingleton();
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+ FxAccountsProfileClient:
+ "resource://gre/modules/FxAccountsProfileClient.sys.mjs",
+});
+
+export var FxAccountsProfile = function (options = {}) {
+ this._currentFetchPromise = null;
+ this._cachedAt = 0; // when we saved the cached version.
+ this._isNotifying = false; // are we sending a notification?
+ this.fxai = options.fxai || fxAccounts._internal;
+ this.client =
+ options.profileClient ||
+ new lazy.FxAccountsProfileClient({
+ fxai: this.fxai,
+ serverURL: options.profileServerUrl,
+ });
+
+ // An observer to invalidate our _cachedAt optimization. We use a weak-ref
+ // just incase this.tearDown isn't called in some cases.
+ Services.obs.addObserver(this, ON_PROFILE_CHANGE_NOTIFICATION, true);
+ // for testing
+ if (options.channel) {
+ this.channel = options.channel;
+ }
+};
+
+FxAccountsProfile.prototype = {
+ // If we get subsequent requests for a profile within this period, don't bother
+ // making another request to determine if it is fresh or not.
+ PROFILE_FRESHNESS_THRESHOLD: 120000, // 2 minutes
+
+ observe(subject, topic, data) {
+ // If we get a profile change notification from our webchannel it means
+ // the user has just changed their profile via the web, so we want to
+ // ignore our "freshness threshold"
+ if (topic == ON_PROFILE_CHANGE_NOTIFICATION && !this._isNotifying) {
+ log.debug("FxAccountsProfile observed profile change");
+ this._cachedAt = 0;
+ }
+ },
+
+ tearDown() {
+ this.fxai = null;
+ this.client = null;
+ Services.obs.removeObserver(this, ON_PROFILE_CHANGE_NOTIFICATION);
+ },
+
+ _notifyProfileChange(uid) {
+ this._isNotifying = true;
+ Services.obs.notifyObservers(null, ON_PROFILE_CHANGE_NOTIFICATION, uid);
+ this._isNotifying = false;
+ },
+
+ // Cache fetched data and send out a notification so that UI can update.
+ _cacheProfile(response) {
+ return this.fxai.withCurrentAccountState(async state => {
+ const profile = response.body;
+ const userData = await state.getUserAccountData();
+ if (profile.uid != userData.uid) {
+ throw new Error(
+ "The fetched profile does not correspond with the current account."
+ );
+ }
+ let profileCache = {
+ profile,
+ etag: response.etag,
+ };
+ await state.updateUserAccountData({ profileCache });
+ if (profile.email != userData.email) {
+ await this.fxai._handleEmailUpdated(profile.email);
+ }
+ log.debug("notifying profile changed for user ${uid}", userData);
+ this._notifyProfileChange(userData.uid);
+ return profile;
+ });
+ },
+
+ async _getProfileCache() {
+ let data = await this.fxai.currentAccountState.getUserAccountData([
+ "profileCache",
+ ]);
+ return data ? data.profileCache : null;
+ },
+
+ async _fetchAndCacheProfileInternal() {
+ try {
+ const profileCache = await this._getProfileCache();
+ const etag = profileCache ? profileCache.etag : null;
+ let response;
+ try {
+ response = await this.client.fetchProfile(etag);
+ } catch (err) {
+ await this.fxai._handleTokenError(err);
+ // _handleTokenError always re-throws.
+ throw new Error("not reached!");
+ }
+
+ // response may be null if the profile was not modified (same ETag).
+ if (!response) {
+ return null;
+ }
+ return await this._cacheProfile(response);
+ } finally {
+ this._cachedAt = Date.now();
+ this._currentFetchPromise = null;
+ }
+ },
+
+ _fetchAndCacheProfile() {
+ if (!this._currentFetchPromise) {
+ this._currentFetchPromise = this._fetchAndCacheProfileInternal();
+ }
+ return this._currentFetchPromise;
+ },
+
+ // Returns cached data right away if available, otherwise returns null - if
+ // it returns null, or if the profile is possibly stale, it attempts to
+ // fetch the latest profile data in the background. After data is fetched a
+ // notification will be sent out if the profile has changed.
+ async getProfile() {
+ const profileCache = await this._getProfileCache();
+ if (!profileCache) {
+ // fetch and cache it in the background.
+ this._fetchAndCacheProfile().catch(err => {
+ log.error("Background refresh of initial profile failed", err);
+ });
+ return null;
+ }
+ if (Date.now() > this._cachedAt + this.PROFILE_FRESHNESS_THRESHOLD) {
+ // Note that _fetchAndCacheProfile isn't returned, so continues
+ // in the background.
+ this._fetchAndCacheProfile().catch(err => {
+ log.error("Background refresh of profile failed", err);
+ });
+ } else {
+ log.trace("not checking freshness of profile as it remains recent");
+ }
+ return profileCache.profile;
+ },
+
+ // Get the user's profile data, fetching from the network if necessary.
+ // Most callers should instead use `getProfile()`; this methods exists to support
+ // callers who need to await the underlying network request.
+ async ensureProfile({ staleOk = false, forceFresh = false } = {}) {
+ if (staleOk && forceFresh) {
+ throw new Error("contradictory options specified");
+ }
+ const profileCache = await this._getProfileCache();
+ if (
+ forceFresh ||
+ !profileCache ||
+ (Date.now() > this._cachedAt + this.PROFILE_FRESHNESS_THRESHOLD &&
+ !staleOk)
+ ) {
+ const profile = await this._fetchAndCacheProfile().catch(err => {
+ log.error("Background refresh of profile failed", err);
+ });
+ if (profile) {
+ return profile;
+ }
+ }
+ log.trace("not checking freshness of profile as it remains recent");
+ return profileCache ? profileCache.profile : null;
+ },
+
+ QueryInterface: ChromeUtils.generateQI([
+ "nsIObserver",
+ "nsISupportsWeakReference",
+ ]),
+};