refactor(date): rename formatDate to dateFormat, subject first

Author: adaptive-shield-matrix

src/date/dateFormat.test.ts

@@ -0,0 +1,44 @@
+import { expect, test } from "bun:test"
+import { dateFormat } from "~utils/date/dateFormat"
+import { dateFormatStyle } from "~utils/date/dateFormatStyle"
+
+const string = "2024-08-31T12:00:00.000Z"
+const date = new Date(string)
+
+const en = "en"
+const de = "de"
+
+test("dateFormat.full.en", () => {
+  const f = dateFormat(date, dateFormatStyle.full, en)
+  expect(f).toEqual("August 31, 2024")
+})
+
+test("dateFormat.full.de", () => {
+  const f = dateFormat(date, dateFormatStyle.full, de)
+  expect(f).toEqual("31. August 2024")
+})
+
+test("dateFormat.numeric.en", () => {
+  const f = dateFormat(date, dateFormatStyle.numeric, en)
+  expect(f).toEqual("8/31/2024")
+})
+
+test("dateFormat.numeric.de", () => {
+  const f = dateFormat(date, dateFormatStyle.numeric, de)
+  expect(f).toEqual("31.8.2024")
+})
+
+test("dateFormat.short.en", () => {
+  const f = dateFormat(date, dateFormatStyle.short, en)
+  expect(f).toEqual("8/31/24")
+})
+
+test("dateFormat.short.de", () => {
+  const f = dateFormat(date, dateFormatStyle.short, de)
+  expect(f).toEqual("31.8.24")
+})
+
+test("dateFormat.iso8601", () => {
+  const f = dateFormat(date, dateFormatStyle.iso)
+  expect(f).toEqual("2024-08-31")
+})

src/date/dateFormat.ts

@@ -0,0 +1,23 @@
+import { dateFormatStyle, type DateFormatStyle } from "~utils/date/dateFormatStyle"
+import { dateFormatterGetCached } from "./dateFormatterGetCached"
+
+export function dateFormat(date: Date, format: DateFormatStyle, l?: string) {
+  const formatter = dateFormatterGetCached(format, l)
+  return formatter.format(date)
+}
+
+export function dateFormatFull(date: Date | string, l?: string) {
+  return dateFormat(typeof date === "string" ? new Date(date) : date, dateFormatStyle.full, l)
+}
+
+export function dateFormatNumeric(date: Date | string, l?: string) {
+  return dateFormat(typeof date === "string" ? new Date(date) : date, dateFormatStyle.numeric, l)
+}
+
+export function dateFormatShort(date: Date | string, l?: string) {
+  return dateFormat(typeof date === "string" ? new Date(date) : date, dateFormatStyle.short, l)
+}
+
+export function dateFormatIso(date: Date | string, l?: string) {
+  return dateFormat(typeof date === "string" ? new Date(date) : date, dateFormatStyle.iso, l)
+}

src/date/dateOnlyFormat.ts src/date/dateFormatStyle.tssrc/date/dateOnlyFormat.ts renamed to src/date/dateFormatStyle.ts

@@ -1,8 +1,8 @@
 import * as a from "valibot"
 
-export type DateOnlyFormat = keyof typeof dateOnlyFormat
+export type DateFormatStyle = keyof typeof dateFormatStyle
 
-export const dateOnlyFormat = {
+export const dateFormatStyle = {
   full: "full",
   numeric: "numeric",
   short: "short",
@@ -12,4 +12,4 @@ export const dateOnlyFormat = {
   iso: "iso",
 } as const
 
-export const dateOnlyFormatSchema = a.enum(dateOnlyFormat)
+export const dateFormatStyleSchema = a.enum(dateFormatStyle)

src/date/dateFormatterCreate.ts

@@ -0,0 +1,34 @@
+import { type DateFormatStyle, dateFormatStyle } from "~utils/date/dateFormatStyle"
+
+export function dateFormatterCreate(format: DateFormatStyle, l?: string): Intl.DateTimeFormat {
+  switch (format) {
+    case dateFormatStyle.full: {
+      return new Intl.DateTimeFormat(l ?? undefined, {
+        year: "numeric",
+        month: "long",
+        day: "numeric",
+      })
+    }
+    case dateFormatStyle.numeric: {
+      return new Intl.DateTimeFormat(l ?? undefined, {
+        month: "numeric",
+        day: "numeric",
+        year: "numeric",
+      })
+    }
+    case dateFormatStyle.short: {
+      return new Intl.DateTimeFormat(l ?? undefined, {
+        year: "2-digit",
+        month: "numeric",
+        day: "numeric",
+      })
+    }
+    case dateFormatStyle.iso: {
+      return new Intl.DateTimeFormat("sv-SE", {
+        year: "numeric",
+        month: "numeric",
+        day: "numeric",
+      })
+    }
+  }
+}

src/date/dateFormatterGetCached.ts

@@ -0,0 +1,15 @@
+import { dateFormatterCreate } from "~utils/date/dateFormatterCreate"
+import { type DateFormatStyle } from "./dateFormatStyle"
+
+let cachedLocale: string | undefined = undefined
+let cachedDateFormat: DateFormatStyle | undefined = undefined
+let cachedFormatter: Intl.DateTimeFormat | undefined = undefined
+
+export function dateFormatterGetCached(format: DateFormatStyle, l?: string): Intl.DateTimeFormat {
+  if (!cachedFormatter || cachedLocale !== l || cachedDateFormat !== format) {
+    cachedLocale = l
+    cachedDateFormat = format
+    cachedFormatter = dateFormatterCreate(format, l)
+  }
+  return cachedFormatter
+}