First Prototype Frontend (Not Finished)

backend/src/main/java/com/example/backend/anwprj/DataBaseHandler.java

@@ -269,6 +269,26 @@ public class DataBaseHandler
         }
     }
 
+    public Semester[] getAllSemesters()
+    {
+        try
+        {
+            ResultSet rs = st.executeQuery("select * from semester");
+            List<Semester> semestersList = new ArrayList<>();
+            Semester s = null;
+            while((s = resultSetToSemester(rs)) != null)
+            {
+                semestersList.add(s);
+            }
+
+            return semestersList.toArray(new Semester[0]);
+        }
+        catch(Exception e)
+        {
+            return null;
+        }
+    }
+
     public Semester updateSemester(Semester semester)
     {
         try

backend/src/main/java/com/example/backend/anwprj/controller/SemesterController.java

@@ -9,6 +9,8 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.Arrays;
+
 @RestController
 public class SemesterController
 {
@@ -82,6 +84,23 @@ public class SemesterController
         return new ResponseEntity<>(HttpStatus.FORBIDDEN);
     }
 
+    @CrossOrigin
+    @GetMapping("/semester/all")
+    public ResponseEntity<Semester[]> getSemester(@RequestParam(name="sessionid") String sessionid)
+    {
+        User u = UserSessionIDHandler.getUserBySessionID(sessionid);
+
+        if(u != null)
+        {
+            if(u.getPermissions() == UserPermissions.admin.getValue())
+            {
+                return new ResponseEntity<>(db.getAllSemesters(), HttpStatus.OK);
+            }
+        }
+
+        return null;
+    }
+
     @CrossOrigin
     @PutMapping("/semester")
     public ResponseEntity<Semester> updateSemester(@RequestBody Semester semester, @RequestParam(name="sessionid") String sessionID)