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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/. */
"use strict";
const { BaseAction } = ChromeUtils.import(
"resource://normandy/actions/BaseAction.jsm"
);
ChromeUtils.defineModuleGetter(
this,
"TelemetryEnvironment",
"resource://gre/modules/TelemetryEnvironment.jsm"
);
ChromeUtils.defineModuleGetter(
this,
"PreferenceRollouts",
"resource://normandy/lib/PreferenceRollouts.jsm"
);
ChromeUtils.defineModuleGetter(
this,
"PrefUtils",
"resource://normandy/lib/PrefUtils.jsm"
);
ChromeUtils.defineModuleGetter(
this,
"ActionSchemas",
"resource://normandy/actions/schemas/index.js"
);
ChromeUtils.defineModuleGetter(
this,
"TelemetryEvents",
"resource://normandy/lib/TelemetryEvents.jsm"
);
var EXPORTED_SYMBOLS = ["PreferenceRollbackAction"];
class PreferenceRollbackAction extends BaseAction {
get schema() {
return ActionSchemas["preference-rollback"];
}
async _run(recipe) {
const { rolloutSlug } = recipe.arguments;
const rollout = await PreferenceRollouts.get(rolloutSlug);
if (!rollout) {
this.log.debug(`Rollback ${rolloutSlug} not applicable, skipping`);
return;
}
switch (rollout.state) {
case PreferenceRollouts.STATE_ACTIVE: {
this.log.info(`Rolling back ${rolloutSlug}`);
rollout.state = PreferenceRollouts.STATE_ROLLED_BACK;
for (const { preferenceName, previousValue } of rollout.preferences) {
PrefUtils.setPref("default", preferenceName, previousValue);
}
await PreferenceRollouts.update(rollout);
TelemetryEvents.sendEvent(
"unenroll",
"preference_rollback",
rolloutSlug,
{
reason: "rollback",
enrollmentId:
rollout.enrollmentId || TelemetryEvents.NO_ENROLLMENT_ID_MARKER,
}
);
TelemetryEnvironment.setExperimentInactive(rolloutSlug);
break;
}
case PreferenceRollouts.STATE_ROLLED_BACK: {
// The rollout has already been rolled back, so nothing to do here.
break;
}
case PreferenceRollouts.STATE_GRADUATED: {
// graduated rollouts can't be rolled back
TelemetryEvents.sendEvent(
"unenrollFailed",
"preference_rollback",
rolloutSlug,
{
reason: "graduated",
enrollmentId:
rollout.enrollmentId || TelemetryEvents.NO_ENROLLMENT_ID_MARKER,
}
);
throw new Error(
`Cannot rollback already graduated rollout ${rolloutSlug}`
);
}
default: {
throw new Error(
`Unexpected state when rolling back ${rolloutSlug}: ${rollout.state}`
);
}
}
}
async _finalize() {
await PreferenceRollouts.saveStartupPrefs();
}
}
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