refactor progress

packages/date_utils/src/DateTimestampStyle.tsx

@@ -0,0 +1,79 @@
+/*
+ * 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 {getDateFormatter} from '@fluxer/date_utils/src/DateFormatterCache';
+import {localeUses12Hour} from '@fluxer/date_utils/src/DateHourCycle';
+import {TimestampStyle} from '@fluxer/markdown_parser/src/types/Enums';
+
+const TIMESTAMP_STYLE_OPTIONS: Record<string, Intl.DateTimeFormatOptions> = {
+	[TimestampStyle.ShortTime]: {hour: 'numeric', minute: 'numeric'},
+	[TimestampStyle.LongTime]: {hour: 'numeric', minute: 'numeric', second: 'numeric'},
+	[TimestampStyle.ShortDate]: {year: 'numeric', month: 'numeric', day: 'numeric'},
+	[TimestampStyle.LongDate]: {month: 'long', day: 'numeric', year: 'numeric'},
+	[TimestampStyle.ShortDateTime]: {month: 'long', day: 'numeric', year: 'numeric', hour: 'numeric', minute: 'numeric'},
+	[TimestampStyle.LongDateTime]: {
+		weekday: 'long',
+		month: 'long',
+		day: 'numeric',
+		year: 'numeric',
+		hour: 'numeric',
+		minute: 'numeric',
+	},
+	[TimestampStyle.ShortDateShortTime]: {
+		month: 'numeric',
+		day: 'numeric',
+		year: 'numeric',
+		hour: 'numeric',
+		minute: 'numeric',
+	},
+	[TimestampStyle.ShortDateMediumTime]: {
+		month: 'numeric',
+		day: 'numeric',
+		year: 'numeric',
+		hour: 'numeric',
+		minute: 'numeric',
+		second: 'numeric',
+	},
+};
+
+const DEFAULT_STYLE_OPTIONS: Intl.DateTimeFormatOptions = {
+	month: 'long',
+	day: 'numeric',
+	year: 'numeric',
+	hour: 'numeric',
+	minute: 'numeric',
+};
+
+const STYLES_WITHOUT_HOUR_CYCLE: ReadonlySet<TimestampStyle> = new Set([
+	TimestampStyle.ShortDate,
+	TimestampStyle.LongDate,
+]);
+
+export function formatTimestampWithStyle(
+	timestamp: number,
+	style: TimestampStyle,
+	locale: string,
+	hour12?: boolean,
+): string {
+	const date = new Date(timestamp * 1000);
+	const baseOptions = TIMESTAMP_STYLE_OPTIONS[style] ?? DEFAULT_STYLE_OPTIONS;
+	const needsHourCycle = !STYLES_WITHOUT_HOUR_CYCLE.has(style);
+	const options = needsHourCycle ? {...baseOptions, hour12: hour12 ?? localeUses12Hour(locale)} : baseOptions;
+	return getDateFormatter(locale, options).format(date);
+}