From b8e27250426568bd2c41d8dd6251bc93e6732e82 Mon Sep 17 00:00:00 2001
From: Elmar Kresse <elmar.kresse@stud.htwk-leipzig.de>
Date: Tue, 10 Sep 2024 14:57:26 +0200
Subject: [PATCH] feat:#22 added static switch between semesters

---
 frontend/src/api/fetchRoomOccupancy.ts        | 26 +++++++++++----
 .../src/components/RoomOccupationOffline.vue  | 32 +++++++++++++++++--
 2 files changed, 49 insertions(+), 9 deletions(-)

diff --git a/frontend/src/api/fetchRoomOccupancy.ts b/frontend/src/api/fetchRoomOccupancy.ts
index f067e38..7c4f4db 100644
--- a/frontend/src/api/fetchRoomOccupancy.ts
+++ b/frontend/src/api/fetchRoomOccupancy.ts
@@ -22,6 +22,11 @@ import { formatYearMonthDay } from "@/helpers/dates";
 const END_OF_SUMMER_SEMESTER = "0930";
 const END_OF_WINTER_SEMESTER = "0331";
 
+export function isSummerSemester(date: Date): boolean {
+  const formattedDate = formatYearMonthDay(date).slice(4);
+  return formattedDate > END_OF_WINTER_SEMESTER && formattedDate <= END_OF_SUMMER_SEMESTER;
+}
+
 /**
  * check if date is in winter semester before summer semester
  * @param date - The date to check
@@ -68,15 +73,24 @@ export async function fetchRoomOccupancy(
   from_date?: string,
   to_date?: string,
 ): Promise<RoomOccupancyList> {
+  let new_from_date: Date | string
+  let new_to_date = to_date
+
+  console.debug("from_date: " + from_date);
+
   if (from_date == undefined) {
-    const new_from_date = getSemesterStart(new Date());
-    from_date = new_from_date.toISOString();
+    new_from_date = getSemesterStart(new Date());
+    new_from_date = new_from_date.toISOString();
+  } else {
+    new_from_date = getSemesterStart(new Date(from_date)).toISOString();
+    new_to_date = getSemesterStart(addMonths(new Date(from_date), 6)).toISOString();
   }
-  if (to_date == undefined) {
-    const new_to_date = getSemesterStart(addMonths(new Date(), 6));
-    to_date = new_to_date.toISOString();
+
+  if (to_date == undefined && new_to_date == undefined) {
+    new_to_date = getSemesterStart(addMonths(new Date(), 6)).toISOString();
   }
 
+
   let roomOccupancyList: RoomOccupancyList = new RoomOccupancyList(
     new Date(),
     0,
@@ -84,7 +98,7 @@ export async function fetchRoomOccupancy(
     [],
   );
 
-  await fetch("/api/schedule/rooms?from=" + from_date + "&to=" + to_date)
+  await fetch("/api/schedule/rooms?from=" + new_from_date + "&to=" + new_to_date)
     .then((response) => {
       return response.arrayBuffer();
     })
diff --git a/frontend/src/components/RoomOccupationOffline.vue b/frontend/src/components/RoomOccupationOffline.vue
index b436e62..261651c 100644
--- a/frontend/src/components/RoomOccupationOffline.vue
+++ b/frontend/src/components/RoomOccupationOffline.vue
@@ -28,7 +28,7 @@ import allLocales from "@fullcalendar/core/locales-all";
 import router from "@/router";
 import { formatYearMonthDay } from "@/helpers/dates";
 import { useQuery } from "@tanstack/vue-query";
-import { fetchRoomOccupancy } from "@/api/fetchRoomOccupancy";
+import { fetchRoomOccupancy, isSummerSemester } from "@/api/fetchRoomOccupancy";
 import { isValid } from "date-fns";
 import { RoomOccupancyList } from "@/model/roomOccupancyList";
 
@@ -89,9 +89,9 @@ function transformData(data: RoomOccupancyList) {
     }));
 }
 
-const { data: occupancy } = useQuery({
+const { data: occupancy, refetch } = useQuery({
   queryKey: ["roomOccupancy"], //, selectedRoom, currentDateFrom, currentDateTo],
-  queryFn: () => fetchRoomOccupancy(),
+  queryFn: () => fetchRoomOccupancy(date.value.toISOString()),
   staleTime: 12 * 3600000, // 12 hours
 });
 
@@ -102,6 +102,32 @@ const occupations = computed(() => {
 
 watch(occupations, () => fullCalendar.value?.getApi().refetchEvents());
 
+
+const fetchedSemesterSummer: Ref<boolean> = ref(isSummerSemester(date.value));
+// refetch occupancy data when date changes the month from march to april or september to october
+watch(currentDateTo, () => {
+  //if preselected date is not in range from april to september, update occupancy data
+
+  console.debug("currentDateTo", currentDateTo.value, isSummerSemester(new Date(currentDateTo.value)));
+  console.debug("currentDateFrom", currentDateFrom.value, isSummerSemester(new Date(currentDateFrom.value)));
+  console.debug("fetchedSemesterSummer", fetchedSemesterSummer.value);
+
+  if (isSummerSemester(new Date(currentDateTo.value)) != fetchedSemesterSummer.value) {
+    fetchedSemesterSummer.value = !fetchedSemesterSummer.value;
+    date.value = new Date(currentDateTo.value);
+    refetch();
+    return;
+  }
+
+  if (isSummerSemester(new Date(currentDateFrom.value)) != fetchedSemesterSummer.value) {
+    fetchedSemesterSummer.value = !fetchedSemesterSummer.value;
+    date.value = new Date(currentDateFrom.value);
+    refetch();
+    return;
+  }
+
+});
+
 const fullCalendar = ref<InstanceType<typeof FullCalendar>>();
 
 const calendarOptions: ComputedRef<CalendarOptions> = computed(() => ({