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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/. */
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
IPProtectionService:
"resource:///modules/ipprotection/IPProtectionService.sys.mjs",
IPProtectionStates:
"resource:///modules/ipprotection/IPProtectionService.sys.mjs",
});
const STATE_CACHE_PREF = "browser.ipProtection.stateCache";
const ENTITLEMENT_CACHE_PREF = "browser.ipProtection.entitlementCache";
const LOCATIONLIST_CACHE_PREF = "browser.ipProtection.locationListCache";
/**
* This class implements a cache for the IPP state machine. The cache is used
* until we receive the `sessionstore-windows-restored` event
*/
class IPPStartupCacheSingleton {
#stateFromCache = null;
#startupCompleted = false;
constructor() {
// For XPCShell tests, the cache must be disabled.
if (
Services.prefs.getBoolPref("browser.ipProtection.cacheDisabled", false)
) {
this.#startupCompleted = true;
return;
}
this.handleEvent = this.#handleEvent.bind(this);
const stateFromCache = Services.prefs.getCharPref(
STATE_CACHE_PREF,
"unset"
);
if (stateFromCache !== "unset") {
this.#stateFromCache = stateFromCache;
}
Services.obs.addObserver(this, "sessionstore-windows-restored");
}
init() {
lazy.IPProtectionService.addEventListener(
"IPProtectionService:StateChanged",
this.handleEvent
);
}
async initOnStartupCompleted() {}
uninit() {
lazy.IPProtectionService.removeEventListener(
"IPProtectionService:StateChanged",
this.handleEvent
);
}
get isStartupCompleted() {
return this.#startupCompleted;
}
get state() {
if (this.#startupCompleted) {
throw new Error("IPPStartupCache should not be used after the startup");
}
if (Object.values(lazy.IPProtectionStates).includes(this.#stateFromCache)) {
return this.#stateFromCache;
}
// This should not happen.
return lazy.IPProtectionStates.UNINITIALIZED;
}
async observe(_subject, topic, _) {
if (topic !== "sessionstore-windows-restored") {
return;
}
// The browser is ready! Let's invalidate the cache and let's recompute the
// state.
Services.obs.removeObserver(this, "sessionstore-windows-restored");
this.#startupCompleted = true;
this.#stateFromCache = null;
await lazy.IPProtectionService.initOnStartupCompleted();
lazy.IPProtectionService.updateState();
}
storeEntitlement(entitlement) {
Services.prefs.setCharPref(
ENTITLEMENT_CACHE_PREF,
JSON.stringify(entitlement)
);
}
get entitlement() {
try {
const entitlement = Services.prefs.getCharPref(
ENTITLEMENT_CACHE_PREF,
""
);
return JSON.parse(entitlement);
} catch (e) {
return null;
}
}
storeLocationList(locationList) {
Services.prefs.setCharPref(
LOCATIONLIST_CACHE_PREF,
JSON.stringify(locationList)
);
}
get locationList() {
try {
const locationList = Services.prefs.getCharPref(
LOCATIONLIST_CACHE_PREF,
""
);
return JSON.parse(locationList);
} catch (e) {
return null;
}
}
#handleEvent(_event) {
const state = lazy.IPProtectionService.state;
if (this.#startupCompleted) {
Services.prefs.setCharPref(STATE_CACHE_PREF, state);
} else {
this.#stateFromCache = state;
}
}
}
const IPPStartupCache = new IPPStartupCacheSingleton();
export { IPPStartupCache, IPPStartupCacheSingleton };
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