feat: convert to composable useDateTimeSalutation

src/composables/useDateTimeSalutation.test.ts

@@ -0,0 +1,31 @@
+import {describe, it, expect} from 'vitest'
+import {hourToSalutation} from './useDateTimeSalutation'
+
+const dateWithHour = (hours: number): Date => {
+	const date = new Date()
+	date.setHours(hours)
+	return date
+}
+
+describe('Salutation', () => {
+	it('shows the right salutation in the night', () => {
+		const salutation = hourToSalutation(dateWithHour(4))
+		expect(salutation).toBe('home.welcomeNight')
+	})
+	it('shows the right salutation in the morning', () => {
+		const salutation = hourToSalutation(dateWithHour(8))
+		expect(salutation).toBe('home.welcomeMorning')
+	})
+	it('shows the right salutation in the day', () => {
+		const salutation = hourToSalutation(dateWithHour(13))
+		expect(salutation).toBe('home.welcomeDay')
+	})
+	it('shows the right salutation in the night', () => {
+		const salutation = hourToSalutation(dateWithHour(20))
+		expect(salutation).toBe('home.welcomeEvening')
+	})
+	it('shows the right salutation in the night again', () => {
+		const salutation = hourToSalutation(dateWithHour(23))
+		expect(salutation).toBe('home.welcomeNight')
+	})
+})

src/composables/useDateTimeSalutation.ts

@@ -0,0 +1,31 @@
+import {computed} from 'vue'
+import {useNow} from '@vueuse/core'
+
+const TRANSLATION_KEY_PREFIX = 'home.welcome'
+
+export function hourToSalutation(now: Date) {
+	const hours = now.getHours()
+
+	if (hours < 5) {
+		return `${TRANSLATION_KEY_PREFIX}Night`
+	}
+
+	if (hours < 11) {
+		return `${TRANSLATION_KEY_PREFIX}Morning`
+	}
+
+	if (hours < 18) {
+		return `${TRANSLATION_KEY_PREFIX}Day`
+	}
+
+	if (hours < 23) {
+		return `${TRANSLATION_KEY_PREFIX}Evening`
+	}
+
+	return `${TRANSLATION_KEY_PREFIX}Night`
+}
+
+export function useDateTimeSalutation() {
+	const now = useNow()
+	return computed(() => hourToSalutation(now.value))
+}