Added Modules to DBHandler

Datenbankeinträge fehlen noch.

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

@@ -6,6 +6,7 @@ import com.example.backend.anwprj.Entries.Entry;
 import com.example.backend.anwprj.Semesters.Semester;
 import com.example.backend.anwprj.Users.User;
 import com.example.backend.anwprj.Week.Week;
+import com.example.backend.anwprj.Module.Module;
 
 import java.sql.*;
 import java.util.ArrayList;
@@ -339,6 +340,103 @@ public class DataBaseHandler
         }
     }
 
+    /**
+     MODULE
+     */
+
+    //get a semester object by its name
+    public Module getModule(String name) {
+        try {
+            ResultSet rs = st.executeQuery("SELECT * FROM SEMESTER WHERE name = '" + name + "'");
+            return resultSetToModule(rs);
+        }
+        catch (Exception ex){
+            return null;
+        }
+    }
+
+    //get a semester object by its id
+    public Module getModule(int id) {
+        try {
+            ResultSet rs = st.executeQuery("SELECT * FROM Module WHERE id=" + id);
+            return  resultSetToModule(rs);
+        }
+        catch (Exception ex) {
+            return null;
+        }
+    }
+
+    public Module addModule(Module m)
+    {
+        try {
+            st.executeUpdate("INSERT INTO Module (lecturerId, semesterId, name) " +
+                    "Values (" + m.getLecturerId() + m.getSemesterId() + m.getName() + ")");
+            return getModule(m.getId());
+
+        }
+        catch (Exception e) {
+            return null;
+        }
+    }
+
+    public Module[] getAllModules() {
+        try
+        {
+            ResultSet rs = st.executeQuery("SELECT * FROM semester");
+            List<Module> moduleList = new ArrayList<>();
+            Module m = null;
+            while((m = resultSetToModule(rs)) != null)
+            {
+                moduleList.add(m);
+            }
+
+            return moduleList.toArray(new Module[0]);
+        }
+        catch(Exception e)
+        {
+            return null;
+        }
+    }
+
+    public Module updateModule(Module m)
+    {
+        try {
+            st.executeUpdate("UPDATE module SET lecturerId=" + m.getLecturerId() + ", " +
+                    "semesterId=" + m.getSemesterId() + ", " +
+                    "name='" + m.getName() + "'");
+            return getModule(m.getId());
+        }
+        catch (SQLException ex) {
+            ex.printStackTrace();
+            return null;
+        }
+    }
+
+    public boolean deleteModule(int id)
+    {
+        try {
+            st.executeUpdate("DELETE FROM module WHERE id=" + id);
+            return true;
+        }
+        catch(Exception ex) {
+            return false;
+        }
+    }
+
+    public Module resultSetToModule(ResultSet rs) {
+        try {
+            rs.next();
+            return new Module(
+                    rs.getInt("id"),
+                    rs.getInt("lecturerId"),
+                    rs.getInt("semesterId"),
+                    rs.getString("name"));
+        }
+        catch (Exception ex) {
+            return null;
+        }
+    }
+
     /**
     USER
      */

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

@@ -7,9 +7,9 @@ public class Module {
     private final int semesterId;
     private final String name;
 
-    public Module(int id, int userId, int semesterId, String name){
+    public Module(int id, int lecturerId, int semesterId, String name){
         this.id = id;
-        this.lecturerId = userId;
+        this.lecturerId = lecturerId;
         this.semesterId = semesterId;
         this.name = name;
     }

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

@@ -2,61 +2,101 @@ package com.example.backend.anwprj.controller;
 
 import com.example.backend.anwprj.DataBaseHandler;
 import com.example.backend.anwprj.Module.Module;
+import com.example.backend.anwprj.Semesters.Semester;
 import com.example.backend.anwprj.Users.User;
+import com.example.backend.anwprj.Users.UserPermissions;
 import com.example.backend.anwprj.Users.UserSessionIDHandler;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.*;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 public class ModuleController {
-//    private final DataBaseHandler db;
+    private final DataBaseHandler db;
-//
+
-//    {
+    {
-//        db = DataBaseHandler.getInstance();
+        db = DataBaseHandler.getInstance();
-//    }
+    }
-//
+
-//    @CrossOrigin
+    @CrossOrigin
-//    @GetMapping("placeholder")
+    @GetMapping("/module")
-//    public ResponseEntity<Module> getModule(
+    public ResponseEntity<Module> getModule(
-//            @RequestParam(name="id") int id,
+            @RequestParam(name="id") int id,
-//            @RequestParam(name="sessionid") String sessionID) {
+            @RequestParam(name="sessionid") String sessionID) {
-//
+
-//        User user = UserSessionIDHandler.getUserBySessionID(sessionID);
+        User user = UserSessionIDHandler.getUserBySessionID(sessionID);
-//
+
-//        if (user != null){
+        if (user != null){
-//            Module module = db.getModule(id);
+            Module module = db.getModule(id);
-//            if(module != null) {
+            if(module != null) {
-//                return new ResponseEntity<>(module, HttpStatus.OK);
+                return new ResponseEntity<>(module, HttpStatus.OK);
-//            }
+            }
-//
+
-//            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
-//        }
+        }
-//
+
-//        return new ResponseEntity<>(HttpStatus.FORBIDDEN);
+        return new ResponseEntity<>(HttpStatus.FORBIDDEN);
-//    }
+    }
-//
+
-//    @CrossOrigin
+    @CrossOrigin
-//    @GetMapping("placeholder")
+    @GetMapping("/module/id")
-//    public ResponseEntity<Module> getModule(
+    public ResponseEntity<Module> getModule(
-//            @RequestParam(name="name") String name,
+            @RequestParam(name="name") String name,
-//            @RequestParam(name="sessionid") String sessionID) {
+            @RequestParam(name="sessionid") String sessionID) {
-//
+
-//        User user = UserSessionIDHandler.getUserBySessionID(sessionID);
+        User user = UserSessionIDHandler.getUserBySessionID(sessionID);
-//
+
-//        if(user != null)
+        if(user != null)
-//        {
+        {
-//            Module module = db.getModule(name);
+            Module module = db.getModule(name);
-//            if (module != null) {
+            if (module != null) {
-//                return new ResponseEntity<>(module, HttpStatus.OK);
+                return new ResponseEntity<>(module, HttpStatus.OK);
-//            }
+            }
-//
+
-//            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
-//        }
+        }
-//
+
-//        return new ResponseEntity<>(HttpStatus.FORBIDDEN);
+        return new ResponseEntity<>(HttpStatus.FORBIDDEN);
-//    }
+    }
+
+    @CrossOrigin
+    @GetMapping("/module/all")
+    public ResponseEntity<Module[]> getModule(@RequestParam(name="sessionid") String sessionid) {
+        User u = UserSessionIDHandler.getUserBySessionID(sessionid);
+
+        if(u != null) {
+            if(u.getPermissions() == UserPermissions.admin.getValue()) {
+                return new ResponseEntity<>(db.getAllModules(), HttpStatus.OK);
+            }
+        }
+
+        return null;
+    }
+
+    @CrossOrigin
+    @PutMapping("/module")
+    public ResponseEntity<Module> updateModule(@RequestBody Module module, @RequestParam(name="sessionid") String sessionID) {
+        User u = UserSessionIDHandler.getUserBySessionID(sessionID);
+        if(u != null && u.getPermissions() == UserPermissions.admin.getValue()) {
+            Module m = db.updateModule(module);
+
+            if(m != null) {
+                return new ResponseEntity<>(m, HttpStatus.OK);
+            }
+
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        return new ResponseEntity<>(HttpStatus.FORBIDDEN);
+    }
+
+    @CrossOrigin
+    @DeleteMapping("/module")
+    public void deleteModule(@RequestParam(name="sessionid") String sessionid, @RequestParam(name="id") int id) {
+        User u = UserSessionIDHandler.getUserBySessionID(sessionid);
+        if(u != null && u.getPermissions() == UserPermissions.admin.getValue()) {
+            db.deleteModule(id);
+        }
+
+    }
 }