Fixed bug in finding ExpenseLists

src/main/java/de/zendric/app/xpensely_server/XpenselyServerApplication.java

@@ -2,8 +2,10 @@ package de.zendric.app.xpensely_server;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
 @SpringBootApplication
+@EnableScheduling
 public class XpenselyServerApplication {
 
 	public static void main(String[] args) {

src/main/java/de/zendric/app/xpensely_server/controller/AppUserController.java

@@ -3,6 +3,7 @@ package de.zendric.app.xpensely_server.controller;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.Authentication;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -41,6 +42,14 @@ public class AppUserController {
         return ResponseEntity.status(HttpStatus.CREATED).body(appUser);
     }
 
+    @PostMapping("/createUser")
+    public ResponseEntity<?> createUsername(@RequestBody AppUser user, Authentication authentication) {
+        String googleUserId = authentication.getName();
+        // Validate and store the username with googleUserId
+
+        return ResponseEntity.ok("Username created successfully");
+    }
+
     @DeleteMapping
     public String deleteUser(@RequestParam Long id) {
         AppUser user = userService.deleteUserById(id);

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

@@ -1,5 +1,6 @@
 package de.zendric.app.xpensely_server.controller;
 
+import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
@@ -16,19 +17,24 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
+import de.zendric.app.xpensely_server.model.AppUser;
 import de.zendric.app.xpensely_server.model.Expense;
 import de.zendric.app.xpensely_server.model.ExpenseList;
+import de.zendric.app.xpensely_server.model.InviteRequest;
 import de.zendric.app.xpensely_server.services.ExpenseListService;
+import de.zendric.app.xpensely_server.services.UserService;
 
 @RestController
 @RequestMapping("/api/expenselist")
 class ExpenseListController {
 
     private ExpenseListService expenseListService;
+    private UserService userService;
 
     @Autowired
-    public ExpenseListController(ExpenseListService expenseListService) {
+    public ExpenseListController(ExpenseListService expenseListService, UserService userService) {
         this.expenseListService = expenseListService;
+        this.userService = userService;
     }
 
     @GetMapping("/all")
@@ -129,4 +135,36 @@ class ExpenseListController {
             return new ResponseEntity<>(null, HttpStatus.EXPECTATION_FAILED);
         }
     }
+
+    @PostMapping("/{listId}/invite")
+    public ResponseEntity<String> generateInvite(@PathVariable Long listId) {
+        String inviteCode = expenseListService.generateInviteCode(listId);
+        return ResponseEntity.ok(inviteCode);
+    }
+
+    @PostMapping("/accept-invite")
+    public ResponseEntity<?> acceptInvite(@RequestBody InviteRequest inviteRequest) {
+        ExpenseList list = expenseListService.findByInviteCode(inviteRequest.getInviteCode());
+
+        if (list == null || list.getInviteCodeExpiration() == null ||
+                list.getInviteCodeExpiration().isBefore(LocalDateTime.now())) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body("Invalid or expired invite code");
+        }
+        if (list.getSharedWith() != null) {
+            return ResponseEntity.status(HttpStatus.IM_USED).body("List has already been shared");
+        }
+        AppUser user = null;
+        try {
+            user = userService.getUser(inviteRequest.getUserId());
+        } catch (Exception e) {
+            throw new RuntimeException("User not found");
+        }
+        if (user != null) {
+            list.setSharedWith(user);
+            expenseListService.save(list);
+        } else {
+            throw new RuntimeException("User not found");
+        }
+        return ResponseEntity.ok("User added to the list");
+    }
 }

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

@@ -1,7 +1,9 @@
 package de.zendric.app.xpensely_server.model;
 
+import java.time.LocalDateTime;
 import java.util.List;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonManagedReference;
 
 import jakarta.persistence.CascadeType;
@@ -9,7 +11,6 @@ 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.AllArgsConstructor;
@@ -29,11 +30,15 @@ public class ExpenseList {
 
     private String name;
 
+    private String inviteCode;
+    @JsonIgnore
+    private LocalDateTime inviteCodeExpiration;
+
     @ManyToOne
     private AppUser owner;
 
-    @ManyToMany
+    @ManyToOne
-    private List<AppUser> sharedWith;
+    private AppUser sharedWith;
 
     @OneToMany(mappedBy = "expenseList", cascade = CascadeType.ALL, orphanRemoval = true)
     @JsonManagedReference

src/main/java/de/zendric/app/xpensely_server/model/InviteRequest.java

@@ -0,0 +1,13 @@
+package de.zendric.app.xpensely_server.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class InviteRequest {
+    private String inviteCode;
+    private Long userId;
+}

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

@@ -10,4 +10,6 @@ import de.zendric.app.xpensely_server.model.ExpenseList;
 @Repository
 public interface ExpenseListRepository extends JpaRepository<ExpenseList, Long> {
     List<ExpenseList> findByOwnerId(Long ownerId);
+
+    ExpenseList findByInviteCode(String inviteCode);
 }

src/main/java/de/zendric/app/xpensely_server/services/CleanupService.java

@@ -0,0 +1,34 @@
+package de.zendric.app.xpensely_server.services;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+
+import de.zendric.app.xpensely_server.model.ExpenseList;
+import de.zendric.app.xpensely_server.repo.ExpenseListRepository;
+
+@Service
+
+public class CleanupService {
+
+    @Autowired
+    private ExpenseListRepository expenseListRepository;
+
+    @Scheduled(cron = "0 0 0 * * ?") // Runs daily at midnight
+    public void cleanupExpiredInvites() {
+        List<ExpenseList> expiredLists = expenseListRepository.findAll().stream()
+                .filter(list -> list.getInviteCodeExpiration() != null &&
+                        list.getInviteCodeExpiration().isBefore(LocalDateTime.now()))
+                .collect(Collectors.toList());
+
+        for (ExpenseList list : expiredLists) {
+            list.setInviteCode(null);
+            list.setInviteCodeExpiration(null);
+            expenseListRepository.save(list);
+        }
+    }
+}

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

@@ -1,9 +1,11 @@
 package de.zendric.app.xpensely_server.services;
 
+import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Optional;
+import java.util.UUID;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -64,15 +66,13 @@ public class ExpenseListService {
         List<ExpenseList> allLists = repository.findAll();
         List<ExpenseList> userSpecificList = new ArrayList<>();
         for (ExpenseList expenseList : allLists) {
-            List<AppUser> sharedWith = expenseList.getSharedWith();
+            AppUser sharedWith = expenseList.getSharedWith();
 
             if (expenseList.getOwner().getId().equals(id)) {
                 userSpecificList.add(expenseList);
             } else {
-                for (AppUser user : sharedWith) {
+                if (sharedWith != null && sharedWith.getId().equals(id)) {
-                    if (user.getId().equals(id)) {
+                    userSpecificList.add(expenseList);
-                        userSpecificList.add(expenseList);
-                    }
                 }
             }
         }
@@ -83,19 +83,18 @@ public class ExpenseListService {
         List<ExpenseList> allLists = repository.findAll();
         List<ExpenseList> userSpecificList = new ArrayList<>();
         for (ExpenseList expenseList : allLists) {
-            List<AppUser> sharedWith = expenseList.getSharedWith();
+            AppUser sharedWith = expenseList.getSharedWith();
 
             if (expenseList.getOwner().getUsername().equals(username)) {
                 userSpecificList.add(expenseList);
             } else {
-                for (AppUser user : sharedWith) {
+                if (sharedWith != null && sharedWith.getUsername().equals(username)) {
-                    if (user.getUsername().equals(username)) {
+                    userSpecificList.add(expenseList);
-                        userSpecificList.add(expenseList);
-                    }
                 }
             }
         }
         return userSpecificList;
+
     }
 
     public Expense addExpenseToList(Long expenseListId, Expense expense) {
@@ -134,4 +133,22 @@ public class ExpenseListService {
         }
         repository.save(expenseList);
     }
+
+    public String generateInviteCode(Long listId) {
+        ExpenseList list = repository.findById(listId)
+                .orElseThrow(() -> new RuntimeException("List not found"));
+
+        String inviteCode = UUID.randomUUID().toString().substring(0, 6).toUpperCase();
+        LocalDateTime expirationTime = LocalDateTime.now().plusWeeks(1);
+
+        list.setInviteCode(inviteCode);
+        list.setInviteCodeExpiration(expirationTime);
+        repository.save(list);
+
+        return inviteCode;
+    }
+
+    public ExpenseList findByInviteCode(String inviteCode) {
+        return repository.findByInviteCode(inviteCode);
+    }
 }

src/main/java/de/zendric/app/xpensely_server/services/UserService.java

@@ -48,4 +48,5 @@ public class UserService {
         } else
             return null;
     }
+
 }