feat: type improvements

src/helpers/time/calculateDayInterval.test.ts

@@ -10,7 +10,7 @@ const days = {
     friday:    5,
     saturday:  6,
     sunday:    0,
-}
+} as Record<string, number>
 
 for (const n in days) {
     test(`today on a ${n}`, () => {
@@ -32,7 +32,7 @@ const nextMonday = {
     friday:    3,
     saturday:  2,
     sunday:    1,
-}
+} as Record<string, number>
 
 for (const n in nextMonday) {
     test(`next monday on a ${n}`, () => {
@@ -48,7 +48,7 @@ const thisWeekend = {
     friday:    1,
     saturday:  0,
     sunday:    0,
-}
+} as Record<string, number>
 
 for (const n in thisWeekend) {
     test(`this weekend on a ${n}`, () => {
@@ -64,7 +64,7 @@ const laterThisWeek = {
     friday:    0,
     saturday:  0,
     sunday:    0,
-}
+} as Record<string, number>
 
 for (const n in laterThisWeek) {
     test(`later this week on a ${n}`, () => {
@@ -80,7 +80,7 @@ const laterNextWeek = {
     friday:    7 + 0,
     saturday:  7 + 0,
     sunday:    7 + 0,
-}
+} as Record<string, number>
 
 for (const n in laterNextWeek) {
     test(`later next week on a ${n} (this week)`, () => {

src/helpers/time/calculateDayInterval.ts

@@ -1,4 +1,6 @@
-export function calculateDayInterval(dateString: string, currentDay = (new Date().getDay())) {
+type Day<T extends number = number> = T
+
+export function calculateDayInterval(dateString: string, currentDay = (new Date().getDay())): Day {
 	switch (dateString) {
 		case 'today':
 			return 0

src/helpers/time/createDateFromString.ts

@@ -6,7 +6,7 @@
  * @param dateString
  * @returns {Date}
  */
-export const createDateFromString = dateString => {
+export function createDateFromString(dateString: string | Date) {
 	if (dateString instanceof Date) {
 		return dateString
 	}

src/helpers/time/formatDate.ts

@@ -8,7 +8,7 @@ import {i18n} from '@/i18n'
 
 const locales = {en: enGB, de, ch: de, fr, ru}
 
-export function dateIsValid(date) {
+export function dateIsValid(date: Date | null) {
 	if (date === null) {
 		return false
 	}