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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
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
});
export class PreferenceRollbackAction extends BaseAction {
get schema() {
return lazy.ActionSchemas["preference-rollback"];
}
async _run(recipe) {
const { rolloutSlug } = recipe.arguments;
const rollout = await lazy.PreferenceRollouts.get(rolloutSlug);
if (lazy.PreferenceRollouts.GRADUATION_SET.has(rolloutSlug)) {
// graduated rollouts can't be rolled back
lazy.TelemetryEvents.sendEvent(
"unenrollFailed",
"preference_rollback",
rolloutSlug,
{
reason: "in-graduation-set",
}
);
throw new Error(
`Cannot rollback rollout in graduation set "${rolloutSlug}".`
);
}
if (!rollout) {
this.log.debug(`Rollback ${rolloutSlug} not applicable, skipping`);
return;
}
switch (rollout.state) {
case lazy.PreferenceRollouts.STATE_ACTIVE: {
this.log.info(`Rolling back ${rolloutSlug}`);
rollout.state = lazy.PreferenceRollouts.STATE_ROLLED_BACK;
for (const { preferenceName, previousValue } of rollout.preferences) {
lazy.PrefUtils.setPref(preferenceName, previousValue, {
branch: "default",
});
}
await lazy.PreferenceRollouts.update(rollout);
lazy.TelemetryEvents.sendEvent(
"unenroll",
"preference_rollback",
rolloutSlug,
{
reason: "rollback",
}
);
lazy.TelemetryEnvironment.setExperimentInactive(rolloutSlug);
break;
}
case lazy.PreferenceRollouts.STATE_ROLLED_BACK: {
// The rollout has already been rolled back, so nothing to do here.
break;
}
case lazy.PreferenceRollouts.STATE_GRADUATED: {
// graduated rollouts can't be rolled back
lazy.TelemetryEvents.sendEvent(
"unenrollFailed",
"preference_rollback",
rolloutSlug,
{
reason: "graduated",
}
);
throw new Error(
`Cannot rollback already graduated rollout ${rolloutSlug}`
);
}
default: {
throw new Error(
`Unexpected state when rolling back ${rolloutSlug}: ${rollout.state}`
);
}
}
}
async _finalize() {
await lazy.PreferenceRollouts.saveStartupPrefs();
}
}