rework prof data using dataclass, change database code, fix bugs

src/backend/semester.py

@@ -1,10 +1,15 @@
 import datetime
 
 
-def generateSemesterByDate():
+def generateSemesterByDate(next:bool = False):
     currentYear = datetime.datetime.now().year
     currentYear = int(str(currentYear)[-2:])
     month = datetime.datetime.now().month
+    if next:
+        month += 1
+        if month > 12:
+            month = 1
+            currentYear += 1
     if month >= 4 and month <= 9:
         return "SoSe " + str(currentYear)
     else:
@@ -12,3 +17,25 @@ def generateSemesterByDate():
             return f"WiSe {currentYear}/{currentYear+1}"
         else:
             return f"WiSe {currentYear-1}/{currentYear}"
+        
+        
+def generateSemesterByOffset(offset):
+    currentYear = datetime.datetime.now().year
+    currentYear = int(str(currentYear)[-2:])
+    month = datetime.datetime.now().month
+    #offset represents a single semester
+    semester = generateSemesterByDate()
+    if offset == 1:
+        if semester.startswith("SoSe"):
+            return f"WiSe {currentYear}/{currentYear+1}"
+        else:
+            return f"SoSe {currentYear+1}"
+    else:
+        #if offset is even, increase the currentyear by offset
+        if offset % 2 == 0:
+            if semester.startswith("SoSe"):
+                return f"SoSe {currentYear+offset//2}"
+            else:
+                return f"WiSe {currentYear+1}/{currentYear+2}"
+        else:
+            return f"WiSe {currentYear+offset//2}/{currentYear+1+offset//2}"