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fluxer_app/src/utils/giftUtils.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 type {I18n} from '@lingui/core';
+import {msg} from '@lingui/core/macro';
+import type {Gift} from '~/actions/GiftActionCreators';
+
+export type GiftDurationPluralization = (durationMonths: number) => string;
+
+export interface GiftDurationTextConfig {
+	lifetime: string;
+	oneYear: string;
+	plural: GiftDurationPluralization;
+}
+
+export interface GiftDurationPayload {
+	duration_months: number;
+}
+
+export const formatGiftDurationText = (durationMonths: number, config: GiftDurationTextConfig): string => {
+	if (durationMonths === 0) {
+		return config.lifetime;
+	}
+
+	if (durationMonths === 12) {
+		return config.oneYear;
+	}
+
+	return config.plural(durationMonths);
+};
+
+export const getPlutoniumDurationConfig = (i18n: I18n): GiftDurationTextConfig => ({
+	lifetime: i18n._(msg`Visionary (Lifetime Plutonium)`),
+	oneYear: i18n._(msg`1 Year of Plutonium`),
+	plural: (durationMonths: number) =>
+		i18n._(
+			durationMonths === 1 ? msg`${durationMonths} Month of Plutonium` : msg`${durationMonths} Months of Plutonium`,
+		),
+});
+
+export const getPremiumDurationConfig = (i18n: I18n): GiftDurationTextConfig => ({
+	lifetime: i18n._(msg`Lifetime Plutonium`),
+	oneYear: i18n._(msg`1 Year of Plutonium`),
+	plural: (durationMonths: number) =>
+		i18n._(
+			durationMonths === 1 ? msg`${durationMonths} Month of Plutonium` : msg`${durationMonths} Months of Plutonium`,
+		),
+});
+
+export const getGiftDurationText = (i18n: I18n, gift: Gift | GiftDurationPayload): string =>
+	formatGiftDurationText(gift.duration_months, getPlutoniumDurationConfig(i18n));
+
+export const getPremiumGiftDurationText = (i18n: I18n, gift: Gift | GiftDurationPayload): string =>
+	formatGiftDurationText(gift.duration_months, getPremiumDurationConfig(i18n));