feat(backend): add CrossOrigin and modify validation

- Add CrossOrigin to allow requests from the frontend
- Modify validation logic (work in progress)

backend/src/main/java/hu/pazmany/controller/Controller.java

@@ -17,7 +17,6 @@ import java.util.Optional;
 
 @RestController
 @RequestMapping("/api")
-@CrossOrigin(origins = "https://vau-vau.web.app/")
 public class Controller {
 	private final DogService dogService;
 	private final UserService userService;
@@ -48,7 +47,7 @@ public class Controller {
 
 	@PostMapping("/newdog")
 	public ResponseEntity<?> addNewDog(@RequestBody DetailedDogDTO dto, @RequestHeader("Authorization") String token) {
-		if(isValidToken(token)) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
+		if(!isValidToken(token)) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
 
 		dogService.addNewDog(dto);
 		return ResponseEntity.status(HttpStatus.CREATED).build();
@@ -57,7 +56,7 @@ public class Controller {
 
 	@PostMapping("/dogs/{id}/edit")
 	public ResponseEntity<?> editDog(@PathVariable Integer id, @RequestBody DetailedDogDTO dto, @RequestHeader("Authorization") String token) {
-		if (isValidToken(token)) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
+		if (!isValidToken(token)) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
 		// Retrieve the dog entity from the database
 		Optional<DetailedDogDTO> optionalDog = dogService.get(id);
 		if (optionalDog.isPresent()) {
@@ -73,7 +72,7 @@ public class Controller {
 
 	@DeleteMapping("/dogs/{id}")
 	public ResponseEntity<?> deleteDog(@PathVariable Integer id, @RequestHeader("Authorization") String token) {
-		if (isValidToken(token)) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
+		if (!isValidToken(token)) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
 
 		dogService.deleteDog(id);
 		return ResponseEntity.ok().build();

backend/src/main/java/hu/pazmany/dto/UserDTO.java

 package hu.pazmany.dto;
 
-import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.Size;
 
 public class UserDTO {
-    @Min(value = 5, message = "Username must be at least 5 characters long")
+    @Size(min = 5, message = "Username must be at least 5 characters long")
     private String username;
-    @Min(value = 5, message = "Password must be at least 5 characters long")
+    @Size(min = 5, message = "Password must be at least 5 characters long")
     private String password;
     private String token;
 

backend/src/main/java/hu/pazmany/security/CorsConfig.java

+package hu.pazmany.security;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class CorsConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedOrigins("https://vau-vau.web.app/", "http://localhost:3000", "http://localhost:3001", "http://localhost:3002", "http://localhost:8080")
+                .allowedMethods("*");
+    }
+}
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