diff --git a/backend/src/main/java/hu/pazmany/Controller.java b/backend/src/main/java/hu/pazmany/Controller.java
index 35053d7231ed1ff7c82fe8f8d5be8235bb57a931..4c2c3fde35375317b6ce1d066f394d482be53134 100644
--- a/backend/src/main/java/hu/pazmany/Controller.java
+++ b/backend/src/main/java/hu/pazmany/Controller.java
@@ -9,31 +9,39 @@ import org.springframework.web.bind.annotation.*;
 @CrossOrigin(origins = "http://localhost:3000")
 @RestController
 public class Controller {
-    private final UserService userService;
-    private final DocumentService documentService;
+    private final NoteStoreService noteStoreService;
     private final ResourceLoader resourceLoader;
 
     @Autowired
-    public Controller(UserService userService, DocumentService documentService, ResourceLoader resourceLoader) {
-        this.userService = userService;
-        this.documentService = documentService;
+    public Controller(hu.pazmany.NoteStoreService noteStoreService, ResourceLoader resourceLoader) {
+        this.noteStoreService = noteStoreService;
         this.resourceLoader = resourceLoader;
     }
 
     @PostMapping("/api/login")
     public String login(@RequestBody UserLoginDto userLoginDto) {
         System.out.println(userLoginDto);
-        return userService.authenticate(userLoginDto.getUsername(), userLoginDto.getPassword());
+        return noteStoreService.authenticate(userLoginDto.getUsername(), userLoginDto.getPassword());
     }
 
     @PostMapping("/api/register")
     public void register(@RequestBody UserLoginDto userLoginDto) {
-        userService.register(userLoginDto.getFullName(), userLoginDto.getUsername(), userLoginDto.getPassword());
+        noteStoreService.register(userLoginDto.getFullName(), userLoginDto.getUsername(), userLoginDto.getPassword());
     }
 
     @PostMapping("/api/details")
     public DocumentDto getDetails(@RequestBody DocumentDto documentDto) {
-        return documentService.getDetails(documentDto.getID(), documentDto.getSubject());
+        return noteStoreService.getDetails(documentDto.getID(), documentDto.getSubject());
+    }
+
+    @PostMapping("/api/setdetails")
+    public void setDetails(@RequestBody DocumentDto documentDto) {
+        noteStoreService.setDetails(documentDto);
+    }
+
+    @PostMapping("/api/addsubject")
+    public void addSubject(@RequestBody SubjectDto subjectDto) {
+        noteStoreService.addSubject(subjectDto);
     }
 
     @GetMapping("/download/{filename:.+}")
@@ -47,9 +55,4 @@ public class Controller {
                 .header("Content-Disposition", "attachment; filename=\"" + resource.getFilename() + "\"")
                 .body(resource);
     }
-
-//    @PostMapping("/api/setdetails")
-//    public void setDetails(@RequestBody DocumentDto documentDto) {
-//        documentService.setDetails(documentDto);
-//    }
 }
\ No newline at end of file
diff --git a/backend/src/main/java/hu/pazmany/DocumentRepository.java b/backend/src/main/java/hu/pazmany/DocumentRepository.java
index 394bdd225936ed14879b7ba6d8dced02dd8678f2..7b97f475228efa0f374a561d1a93a13f1010421b 100644
--- a/backend/src/main/java/hu/pazmany/DocumentRepository.java
+++ b/backend/src/main/java/hu/pazmany/DocumentRepository.java
@@ -2,7 +2,6 @@ package hu.pazmany;
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import java.util.List;
-import java.util.Optional;
 
 public interface DocumentRepository extends JpaRepository<Document, Long>{
     List<Document> findAllByUser(User user);
diff --git a/backend/src/main/java/hu/pazmany/DocumentService.java b/backend/src/main/java/hu/pazmany/DocumentService.java
deleted file mode 100644
index 749639ed3b378cecfcb85c4f2ce3a2fe339fd238..0000000000000000000000000000000000000000
--- a/backend/src/main/java/hu/pazmany/DocumentService.java
+++ /dev/null
@@ -1,63 +0,0 @@
-package hu.pazmany;
-
-import org.springframework.stereotype.Service;
-
-import java.util.List;
-
-@Service
-public class DocumentService {
-    private final DocumentRepository documentRepository;
-    private final UserRepository userRepository;
-    private final SubjectRepository subjectRepository;
-
-    public DocumentService(DocumentRepository documentRepository, UserRepository userRepository, SubjectRepository subjectRepository) {
-        this.documentRepository = documentRepository;
-        this.userRepository = userRepository;
-        this.subjectRepository = subjectRepository;
-    }
-
-    public DocumentDto getDetails(long id, String subjectName) {
-        User user = new User();
-        user.setUsername("kazsa");
-        user.setPassword("keksz");
-        user.setFullName("Kada Zsolt");
-        userRepository.save(user);
-
-        Subject subject = new Subject();
-        subject.setSubjectId("PPKE-");
-        subject.setName("Szofttech");
-        subjectRepository.save(subject);
-
-        Document document = new Document();
-        document.setUser(user);
-        document.setSubject(subject);
-        document.setDescription("Előadás");
-        document.setTitle("1. előadás");
-        document.setFilepath("1.eloadas_szoftvertechnologia_2024_v1.0.pdf");
-        documentRepository.save(document);
-
-        Document result = documentRepository.findAllByUser(user).get(0);
-
-        DocumentDto doc = new DocumentDto();
-        doc.setID(result.getId());
-        doc.setUser(result.getUser().getFullName());
-        doc.setSubject(result.getSubject().getName());
-        doc.setTitle(result.getTitle());
-        doc.setDescription(result.getDescription());
-        doc.setFilepath(result.getFilepath());
-
-        return doc;
-    }
-
-//    public void setDetails(DocumentDto documentDto) {
-//        Document document = new Document();
-//        document.setId(documentDto.getID());
-//        document.setUser(userRepository.findByUsername(documentDto.getUser()));
-//        document.setSubject(subjectRepository.findBySubjectId(documentDto.getSubject()));
-//        document.setTitle(documentDto.getTitle());
-//        document.setDescription(documentDto.getDescription());
-////        document.setUploaded(documentDto.getUploaded());
-//        document.setFilepath(documentDto.getFilepath());
-//        documentRepository.save(document);
-//    }
-}
diff --git a/backend/src/main/java/hu/pazmany/NoteStoreService.java b/backend/src/main/java/hu/pazmany/NoteStoreService.java
new file mode 100644
index 0000000000000000000000000000000000000000..83f908ab039fd472e4cb88e34de44cadea05f6ca
--- /dev/null
+++ b/backend/src/main/java/hu/pazmany/NoteStoreService.java
@@ -0,0 +1,68 @@
+package hu.pazmany;
+
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDateTime;
+
+@Service
+public class NoteStoreService {
+    private final DocumentRepository documentRepository;
+    private final UserRepository userRepository;
+    private final SubjectRepository subjectRepository;
+
+    public NoteStoreService(DocumentRepository documentRepository, UserRepository userRepository, SubjectRepository subjectRepository) {
+        this.documentRepository = documentRepository;
+        this.userRepository = userRepository;
+        this.subjectRepository = subjectRepository;
+    }
+
+    public String authenticate(String username, String password) {
+        User user = userRepository.findByUsername(username);
+        if (user != null && user.getPassword().equals(password)) {
+            return user.getFullName();
+        }
+        return "Helytelen felhasználónév vagy jelszó!";
+    }
+
+    public void register(String fullName, String username, String password) {
+        User user = new User();
+        user.setFullName(fullName);
+        user.setUsername(username);
+        user.setPassword(password);
+        userRepository.save(user);
+    }
+
+    public DocumentDto getDetails(long id, String subjectName) {
+        Document result = documentRepository.findAllBySubject(subjectRepository.findBySubjectId(subjectName)).get((int) id);
+
+        DocumentDto doc = new DocumentDto();
+        doc.setID(result.getId());
+        doc.setUser(result.getUser().getFullName());
+        doc.setSubject(result.getSubject().getName());
+        doc.setTitle(result.getTitle());
+        doc.setUploaded(result.getUploaded().toString());
+        doc.setDescription(result.getDescription());
+        doc.setFilepath(result.getFilepath());
+
+        return doc;
+    }
+
+    public void setDetails(DocumentDto documentDto) {
+        Document document = new Document();
+        document.setId(documentDto.getID());
+        document.setUser(userRepository.findByUsername(documentDto.getUser()));
+        document.setSubject(subjectRepository.findBySubjectId(documentDto.getSubject()));
+        document.setTitle(documentDto.getTitle());
+        document.setDescription(documentDto.getDescription());
+        document.setUploaded(LocalDateTime.now());
+        document.setFilepath(documentDto.getFilepath());
+        documentRepository.save(document);
+    }
+
+    public void addSubject(SubjectDto subjectDto) {
+        Subject subject = new Subject();
+        subject.setSubjectId(subjectDto.getSubjectId());
+        subject.setName(subjectDto.getName());
+        subjectRepository.save(subject);
+    }
+}
diff --git a/backend/src/main/java/hu/pazmany/SubjectDto.java b/backend/src/main/java/hu/pazmany/SubjectDto.java
new file mode 100644
index 0000000000000000000000000000000000000000..9ed9464c8f59226cc470969381e53a64bb4a36f9
--- /dev/null
+++ b/backend/src/main/java/hu/pazmany/SubjectDto.java
@@ -0,0 +1,19 @@
+package hu.pazmany;
+
+public class SubjectDto {
+    private String subjectId;
+    private String name;
+
+    public String getSubjectId() {
+        return subjectId;
+    }
+    public void setSubjectId(String subjectId) {
+        this.subjectId = subjectId;
+    }
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+}
diff --git a/backend/src/main/java/hu/pazmany/UserService.java b/backend/src/main/java/hu/pazmany/UserService.java
deleted file mode 100644
index ea3b4a204400ad2591222c405dce469c4e6351d1..0000000000000000000000000000000000000000
--- a/backend/src/main/java/hu/pazmany/UserService.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package hu.pazmany;
-
-import org.springframework.stereotype.Service;
-
-@Service
-public class UserService {
-    private final UserRepository userRepository;
-
-    public UserService(UserRepository userRepository) {
-        this.userRepository = userRepository;
-    }
-
-    public String authenticate(String username, String password) {
-        User user = userRepository.findByUsername(username);
-        if (user != null && user.getPassword().equals(password)) {
-            return user.getFullName();
-        }
-        return "Helytelen felhasználónév vagy jelszó!";
-    }
-
-    public void register(String fullName, String username, String password) {
-        User user = new User();
-        user.setFullName(fullName);
-        user.setUsername(username);
-        user.setPassword(password);
-        userRepository.save(user);
-    }
-}
diff --git a/backend/src/main/resources/3.eloadas_szoftvertechnologia_2024_v1.0.pdf b/backend/src/main/resources/3.eloadas_szoftvertechnologia_2024_v1.0.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..db91337e6f21b510b058d1a659294b35092ab17b
Binary files /dev/null and b/backend/src/main/resources/3.eloadas_szoftvertechnologia_2024_v1.0.pdf differ
diff --git a/frontend/src/components/browse-komponens.vue b/frontend/src/components/browse-komponens.vue
index 92af67ab677eb7f7494f46e2d91aa67e8d5653b3..4f8cd7259bcb6e1df3a1472f82f26dc20d1f29c5 100644
--- a/frontend/src/components/browse-komponens.vue
+++ b/frontend/src/components/browse-komponens.vue
@@ -9,7 +9,7 @@ const description = ref("Jegyzet leírása")
 let fileName = ref("")
 
 function getDocumentDetails(id) {
-  axios.post('http://localhost:8080/api/details', {id: id, subject: "Szofttech"})
+  axios.post('http://localhost:8080/api/details', {id: id, subject: "szofttech"})
       .then(response => {
         console.log(response.data)
         title.value = response.data["title"]
@@ -22,19 +22,35 @@ function getDocumentDetails(id) {
       });
 }
 
-// axios.post('http://localhost:8080/api/setdetails', {
-//   id: 0,
-//   user: "kazso",
-//   subject: "szofttech",
-//   title: "1. előadás",
-//   description: "hehe",
-//   uploaded: "idk",
-//   filepath: "documents/1.eloadas_szoftvertechnologia_2024_v1.0.pdf"
-// }).then(response => {
-//   console.log(response.data)
-// }).catch(error => {
-//       console.log(error);
-//     });
+function registerUser(credentials) {
+  axios.post('http://localhost:8080/api/register', credentials)
+      .then(response => {
+        console.log("Sikeres regisztráció!")
+      })
+      .catch(error => {
+        console.error('Sikertelen regisztráció!', error);
+      });
+}
+
+// Prepopulating the database
+registerUser({fullName: 'Kada Zsolt', username: 'kazso', password: 'keksz'})
+axios.post('http://localhost:8080/api/addsubject', {subjectId: "szofttech", name: "Szoftver Technológia"})
+axios.post('http://localhost:8080/api/setdetails', {
+  id: 1,
+  user: "kazso",
+  subject: "szofttech",
+  title: "1. előadás",
+  description: "tehe",
+  filepath: "1.eloadas_szoftvertechnologia_2024_v1.0.pdf"
+})
+axios.post('http://localhost:8080/api/setdetails', {
+  id: 1,
+  user: "kazso",
+  subject: "szofttech",
+  title: "3. előadás",
+  description: "tehee",
+  filepath: "3.eloadas_szoftvertechnologia_2024_v1.0.pdf"
+})
 
 function downloadFile(filename) {
   console.log("Filename:", filename);
@@ -51,7 +67,7 @@ function downloadFile(filename) {
         document.body.appendChild(link);
         link.click();
         document.body.removeChild(link);
-        window.URL.revokeObjectURL(url);  // Clean up
+        window.URL.revokeObjectURL(url);
       })
       .catch(error => console.error('Download error:', error));
 }
@@ -63,10 +79,10 @@ function downloadFile(filename) {
     <main class="browse">
       <ul class="browse-list">
         <li class="module">Modul 1</li>
-        <li id="0" @click=getDocumentDetails(0)>Jegyzet</li>
-        <li>Jegyzet</li>
+        <li @click=getDocumentDetails(0)>Szofttech ead 1</li>
+        <li @click=getDocumentDetails(1)>Szofttech ead 3</li>
         <li class="module">Modul 2</li>
-        <li>Jegyzet</li>
+        <li>Másik jegyzet</li>
       </ul>
     </main>
     <main>