fix most type errors

still have a few things outstanding

helpers/array.test.ts

@@ -1,17 +1,13 @@
 import { getNextSmaller, getNextBigger } from './array'
 
-// @ts-expect-error ts-migrate(2582) FIXME: Cannot find name 'test'. Do you need to install ty... Remove this comment to see the full error message
 test('getPreviousInOrder', () => {
   const result = getNextSmaller([3, 1, 2, 0, 8, 9, 10], 5)
 
-  // @ts-expect-error ts-migrate(2304) FIXME: Cannot find name 'expect'.
   expect(result).toEqual(3)
 })
 
-// @ts-expect-error ts-migrate(2582) FIXME: Cannot find name 'test'. Do you need to install ty... Remove this comment to see the full error message
 test('getNextInOrder', () => {
   const result = getNextBigger([7, 8, 9, 3, 1, 2], 4)
 
-  // @ts-expect-error ts-migrate(2304) FIXME: Cannot find name 'expect'.
   expect(result).toEqual(7)
 })

helpers/array.ts

@@ -1,4 +1,4 @@
-export function getNextSmaller(array, pivot) {
+export function getNextSmaller<T>(array: T[], pivot: T) {
   if (!array || !Array.isArray(array) || !array.length) {
     return null
   }
@@ -9,7 +9,7 @@ export function getNextSmaller(array, pivot) {
     .find((item) => item < pivot)
 }
 
-export function getNextBigger(array, pivot) {
+export function getNextBigger<T>(array: T[], pivot: T) {
   if (!array || !Array.isArray(array) || !array.length) {
     return null
   }

helpers/date.ts

@@ -3,7 +3,13 @@ import moment from 'moment'
 const FRONTEND_FORMAT = 'DD.MM.YYYY'
 const BACKEND_FORMAT = 'YYYY-MM-DD'
 
-export function getDays({ startDate, endDate }) {
+export function getDays({
+  startDate,
+  endDate,
+}: {
+  startDate: moment.MomentInput
+  endDate: moment.MomentInput
+}) {
   let currentDay = moment(startDate)
   const days = [dateFormatBackend(currentDay)]
 
@@ -20,31 +26,30 @@ export function getDays({ startDate, endDate }) {
   return days
 }
 
-function dateFormat(date, format) {
+function dateFormat(date: moment.MomentInput, format: string) {
   if (!date) {
     return null
   }
   return moment(date).format(format)
 }
 
-export function dateFormatBackend(date) {
+export function dateFormatBackend(date: moment.MomentInput) {
   return dateFormat(date, BACKEND_FORMAT)
 }
 
-export function dateFormatFrontend(date) {
+export function dateFormatFrontend(date: moment.MomentInput) {
   return dateFormat(date, FRONTEND_FORMAT)
 }
 
-function dateParse(string, format) {
-  const date = moment(string, format)
+function dateParse(input: string, format: string) {
+  const date = moment(input, format)
   if (date.isValid()) {
-    // @ts-expect-error ts-migrate(2339) FIXME: Property 'getDate' does not exist on type 'Moment'... Remove this comment to see the full error message
-    return date.getDate()
+    return date.toDate()
   }
 
   return null
 }
 
-export function dateParseFrontend(string) {
-  return dateParse(string, FRONTEND_FORMAT)
+export function dateParseFrontend(input: string) {
+  return dateParse(input, FRONTEND_FORMAT)
 }

helpers/mail.ts

@@ -12,7 +12,7 @@ if (!SENDGRID_API_KEY) {
   throw new Error('NO SENDGRID_API_KEY set!')
 }
 
-async function sendMail(data) {
+async function sendMail(data: object) {
   const fetchOptions = {
     method: 'POST',
     headers: {
@@ -24,13 +24,11 @@ async function sendMail(data) {
   const response = await fetch(SENDGRID_URL, fetchOptions)
 
   if (!response.ok) {
-    throw new Error(
-      `Failed to send booking ${data._id} to booking admin with status ${response.status}: ${response.statusText}`
-    )
+    throw new Error(`Unable to send mail`)
   }
 }
 
-function getReceivedBookingText(booking) {
+function getReceivedBookingText(booking: { uuid: string }) {
   return `Hallo lieber Admin,
 
   es ging folgende Buchung ein: https://${process.env.VERCEL_URL}/booking/${booking.uuid}
@@ -38,7 +36,7 @@ function getReceivedBookingText(booking) {
   MfG`
 }
 
-export async function sendReceivedBookingMail(booking) {
+export async function sendReceivedBookingMail(booking: { uuid: string }) {
   const data = {
     personalizations: [
       {
@@ -46,9 +44,13 @@ export async function sendReceivedBookingMail(booking) {
       },
     ],
     from: { email: FROM_EMAIL },
-    subject: 'Pfadi Bussle - Buchung eingegangen!',
+    subject: `Pfadi Bussle - Buchung ${booking.uuid} eingegangen!`,
     content: [{ type: 'text/plain', value: getReceivedBookingText(booking) }],
   }
 
-  await sendMail(data)
+  try {
+    await sendMail(data)
+  } catch (error) {
+    console.error(`Failed in sendReceivedBookingMail for ${booking.uuid}`)
+  }
 }