Added dummy flow to add appointments using the calendar

src/lib/utils/datetime.ts

@@ -1,15 +1,28 @@
+import { getLocale } from "$i18n/runtime";
+import type { TCalendarSlot } from "$lib/types/calendar";
 import { parseAbsoluteToLocal, toCalendarDateTime } from "@internationalized/date";
 
-export const toDisplayDateTime = (date: Date) => {
+export const toDisplayDateTime = (date: Date, opts?: Intl.DateTimeFormatOptions) => {
   const hours = date.getHours();
   const minutes = date.getMinutes();
-  const formatter = new Intl.DateTimeFormat(navigator.language, {
-    dateStyle: "short",
-    ...(hours !== 0 || minutes !== 0 ? { timeStyle: "short" } : {}),
-  });
+  const formatter = new Intl.DateTimeFormat(
+    getLocale(),
+    opts ?? {
+      dateStyle: "short",
+      ...(hours !== 0 || minutes !== 0 ? { timeStyle: "short" } : {}),
+    },
+  );
   return formatter.format(date);
 };
 
+export const calendarItemToDate = (item: TCalendarSlot) => {
+  const [year, month, day] = item.date.split("-").map(Number);
+  const [hours, minutes] = item.start.split(":").map((it) => parseInt(it));
+  const date = new Date(year, month - 1, day);
+  date.setHours(hours, minutes, 0, 0);
+  return date;
+};
+
 export const toInputDateTime = (dateStr: string) => {
   return toCalendarDateTime(parseAbsoluteToLocal(dateStr));
 };