src/main/java/de/zendric/app/XpenselyServer/controller/ExpenseListController.java

@@ -0,0 +1,38 @@
+package de.zendric.app.XpenselyServer.controller;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import de.zendric.app.XpenselyServer.model.ExpenseList;
+import de.zendric.app.XpenselyServer.services.ExpenseListService;
+
+@RestController
+@RequestMapping("/api/lists")
+public class ExpenseListController {
+    
+    @Autowired
+    private ExpenseListService service;
+
+    @GetMapping
+    public List<ExpenseList> getAllLists() {
+        return service.getAllLists();
+    }
+
+    @PostMapping
+    public ExpenseList createList(@RequestBody ExpenseList list) {
+        return service.createList(list);
+    }
+
+    @DeleteMapping("/{id}")
+    public void deleteList(@PathVariable Long id) {
+        service.deleteList(id);
+    } 
+}

src/main/java/de/zendric/app/XpenselyServer/model/AppUser.java

@@ -0,0 +1,22 @@
+package de.zendric.app.XpenselyServer.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Getter
+@Setter
+public class AppUser {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String username;
+    private String password;
+
+  
+}

src/main/java/de/zendric/app/XpenselyServer/model/Expense.java

@@ -0,0 +1,26 @@
+package de.zendric.app.XpenselyServer.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+public class Expense {
+   
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String description;
+    private Double amount;
+    
+
+    @ManyToOne
+    private ExpenseList expenseList;
+}

src/main/java/de/zendric/app/XpenselyServer/model/ExpenseList.java

@@ -0,0 +1,34 @@
+package de.zendric.app.XpenselyServer.model;
+
+import java.util.List;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToMany;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Getter
+@Setter
+public class ExpenseList {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    
+    private String name;
+
+    @ManyToOne
+    private AppUser owner;
+
+    @ManyToMany
+    private List<AppUser> sharedWith;
+
+    @OneToMany(mappedBy = "expenseList", cascade = CascadeType.ALL)
+    private List<Expense> expenses;
+}

src/main/java/de/zendric/app/XpenselyServer/repo/ExpenseListRepository.java

@@ -0,0 +1,11 @@
+package de.zendric.app.XpenselyServer.repo;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import de.zendric.app.XpenselyServer.model.ExpenseList;
+
+import java.util.List;
+
+public interface ExpenseListRepository extends JpaRepository<ExpenseList, Long> {
+    List<ExpenseList> findByOwnerId(Long ownerId);
+}

src/main/java/de/zendric/app/XpenselyServer/services/ExpenseListService.java

@@ -0,0 +1,27 @@
+package de.zendric.app.XpenselyServer.services;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import de.zendric.app.XpenselyServer.model.ExpenseList;
+import de.zendric.app.XpenselyServer.repo.ExpenseListRepository;
+
+@Service
+public class ExpenseListService {
+    @Autowired
+    private ExpenseListRepository repository;
+
+    public List<ExpenseList> getAllLists() {
+        return repository.findAll();
+    }
+
+    public ExpenseList createList(ExpenseList list) {
+        return repository.save(list);
+    }
+
+    public void deleteList(Long id) {
+        repository.deleteById(id);
+    }
+}