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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/. */
import { MigrationUtils } from "resource:///modules/MigrationUtils.sys.mjs";
import { E10SUtils } from "resource://gre/modules/E10SUtils.sys.mjs";
/**
* This class is responsible for communicating with MigrationUtils to do the
* actual heavy-lifting of any kinds of migration work, based on messages from
* the associated MigrationWizardChild.
*/
export class MigrationWizardParent extends JSWindowActorParent {
/**
* General message handler function for messages received from the
* associated MigrationWizardChild JSWindowActor.
*
* @param {ReceiveMessageArgument} message
* The message received from the MigrationWizardChild.
* @returns {Promise}
*/
async receiveMessage(message) {
// Some belt-and-suspenders here, mainly because the migration-wizard
// component can be embedded in less privileged content pages, so let's
// make sure that any messages from content are coming from the privileged
// about content process type.
if (
!this.browsingContext.currentWindowGlobal.isInProcess &&
this.browsingContext.currentRemoteType !=
E10SUtils.PRIVILEGEDABOUT_REMOTE_TYPE
) {
throw new Error(
"MigrationWizardParent: received message from the wrong content process type."
);
}
if (message.name == "GetAvailableMigrators") {
let availableMigrators = new Map();
for (const key of MigrationUtils.availableMigratorKeys) {
try {
let migratorPromise = MigrationUtils.getMigrator(key).catch(
console.error
);
if (migratorPromise) {
availableMigrators.set(key, migratorPromise);
}
} catch (e) {
console.error(`Could not get migrator with key ${key}`);
}
}
// Wait for all getMigrator calls to resolve in parallel
await Promise.all(availableMigrators.values());
// ...and then filter out any that resolved to null.
return Array.from(availableMigrators.keys()).filter(key => {
return availableMigrators.get(key);
});
}
return null;
}
}
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