Calender Sidebar Get Months from Semester

anwendung/src/components/CalendarSideBar.jsx

@@ -1,22 +1,28 @@
+import {useEffect} from "react";
+
 let startParts = []
 let endParts = []
 const months = [["Januar", 31], ["Februar", 28], ["März", 31], ["April", 30], ["Mai", 31], ["Juni", 30], ["Juli", 31], ["August", 31], ["September", 30], ["Oktober", 31], ["November", 30], ["Dezember", 31]]
 const days = months.map((month => month[1]))
 let result = []
-let check = true
 let startDate
 let calculatedDay = []
 const weekdays = ["Mo", "Di", "Mi", "Do", "Fr", "Sa", "So"]
 
 export default function BasicDateCalendar(p) {
-    if (check) {
+
+    useEffect(() => {
+        startParts = []
+        endParts = []
+        result = []
+        calculatedDay = []
+
         startDate = new Date(p.startyear,  0 ,p.startday)
         let endDate = new Date(p.endyear, 0 , p.endday)
         let startString = startDate.getDate() + "." + (startDate.getMonth() + 1) +  "." + p.startyear
         let endString = endDate.getDate() + "." + (endDate.getMonth() + 1) +  "." + p.endyear
         generateCalendar(startString, endString)
-        check = false
-    }
+    })
 
     return (
         <div className={"Allround"}>

anwendung/src/components/CalenderView.jsx

@@ -27,6 +27,11 @@ export default function CalenderView(p) {
     const [update, setUpdate] = useState(false)
     const scrollRef = useRef(null);
 
+    const[startDayCalenderSideBar, setStartDayCalenderSideBar] = useState(0)
+    const[startYearCalenderSideBar, setStartYearCalenderSideBar] = useState(2000)
+    const[endDayCalenderSideBar, setEndDayCalenderSideBar] = useState(0)
+    const[endYearCalenderSideBar, setEndYearCalenderSideBar] = useState(2000)
+
     function readEntries() {
         let url = baseURL + "/entries?semesterid=" + localStorage.getItem("currentsid") +
             "&daynumber=" + currentWeekStartDay + "&yearnumber=" + currentYear + "&sessionid=" + localStorage.getItem("sessionid");
@@ -311,7 +316,12 @@ export default function CalenderView(p) {
         fetch(url).then(r => r.json()).then(s => {
             currentWeekStartDay = s.startday - new Date(s.startyear, 0, s.startday).getUTCDay();
             currentYear = s.startyear;
+            setStartYearCalenderSideBar(currentYear)
+            setEndYearCalenderSideBar(s.endyear)
+
             semesterStart = s.startday;
+            setStartDayCalenderSideBar(semesterStart)
+            setEndDayCalenderSideBar(s.endday)
         }).then(readEntries)
 
         scrollRef.current.scrollTop = 600;
@@ -376,7 +386,7 @@ export default function CalenderView(p) {
             alignItems: "center"
         }}>
             <div>
-                <BasicDateCalendar startyear={2023} startday={34} endyear={2024} endday={100} onMonthClick={onMonthClick}/>
+                <BasicDateCalendar startyear={startYearCalenderSideBar} startday={startDayCalenderSideBar} endyear={endYearCalenderSideBar} endday={endDayCalenderSideBar} onMonthClick={onMonthClick}/>
             </div>
             <div style={{
                 display: "flex",