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fluxer_app/src/stores/FeatureFlagOverridesStore.ts

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+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {makeAutoObservable} from 'mobx';
+import type {FeatureFlag} from '~/Constants';
+import {makePersistent} from '~/lib/MobXPersistence';
+
+type FeatureFlagOverrides = Partial<Record<FeatureFlag, boolean>>;
+
+class FeatureFlagOverridesStore {
+	overrides: FeatureFlagOverrides = {};
+
+	constructor() {
+		makeAutoObservable(this, {}, {autoBind: true});
+		void this.initPersistence();
+	}
+
+	private async initPersistence(): Promise<void> {
+		await makePersistent(this, 'FeatureFlagOverridesStore', ['overrides']);
+	}
+
+	getOverride(flag: FeatureFlag): boolean | null {
+		if (Object.hasOwn(this.overrides, flag)) {
+			return this.overrides[flag] ?? null;
+		}
+		return null;
+	}
+
+	setOverride(flag: FeatureFlag, value: boolean | null): void {
+		const next = {...this.overrides};
+
+		if (value === null) {
+			delete next[flag];
+		} else {
+			next[flag] = value;
+		}
+
+		this.overrides = next;
+	}
+}
+
+export default new FeatureFlagOverridesStore();