Fixed issue when trying to retrieve non-existing user during e-mail confirmation and when the e-mail is confirmed it will show proper message on the frontend (ref #233)

dmp-backend/web/src/main/java/eu/eudat/controllers/EmailConfirmation.java

@@ -36,7 +36,11 @@ public class EmailConfirmation {
 			return ResponseEntity.status(HttpStatus.OK).body(new ResponseItem().status(ApiMessageCode.SUCCESS_MESSAGE));
 		} catch
 		(HasConfirmedEmailException | TokenExpiredException ex) {
+			if (ex instanceof  TokenExpiredException) {
 				return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(new ResponseItem().status(ApiMessageCode.NO_MESSAGE));
+			} else {
+				return ResponseEntity.status(HttpStatus.FOUND).body(new ResponseItem().status(ApiMessageCode.WARN_MESSAGE));
+			}
 		}
 	}
 
@@ -48,6 +52,9 @@ public class EmailConfirmation {
 			this.emailConfirmationManager.sendConfirmationEmail(email, principal);
 			return ResponseEntity.status(HttpStatus.OK).body(new ResponseItem().status(ApiMessageCode.SUCCESS_MESSAGE));
 		} catch (Exception ex) {
+			if (ex instanceof HasConfirmedEmailException) {
+				return ResponseEntity.status(HttpStatus.FOUND).body(new ResponseItem().status(ApiMessageCode.WARN_MESSAGE));
+			}
 			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(new ResponseItem().status(ApiMessageCode.NO_MESSAGE));
 		}
 	}

dmp-backend/web/src/main/java/eu/eudat/logic/managers/EmailConfirmationManager.java

@@ -34,20 +34,21 @@ public class EmailConfirmationManager {
 				.getDatabaseRepository().getLoginConfirmationEmailDao().asQueryable()
 				.where((builder, root) -> builder.equal(root.get("token"), UUID.fromString(token))).getSingle();
 
-		if (loginConfirmationEmail.getExpiresAt().compareTo(new Date()) < 0)
-			throw new TokenExpiredException("Token has expired.");
-
 		UserInfo user = databaseRepository.getUserInfoDao().asQueryable()
 				.where((builder, root) -> builder.equal(root.get("id"), loginConfirmationEmail.getUserId())).getSingle();
 
 		if (user.getEmail() != null)
 			throw new HasConfirmedEmailException("User already has confirmed his Email.");
 
+		if (loginConfirmationEmail.getExpiresAt().compareTo(new Date()) < 0)
+			throw new TokenExpiredException("Token has expired.");
+
 		loginConfirmationEmail.setIsConfirmed(true);
 
 		// Checks if mail is used by another user. If it is, merges the new the old.
+		Long existingUsers = databaseRepository.getUserInfoDao().asQueryable().where((builder, root) -> builder.equal(root.get("email"), loginConfirmationEmail.getEmail())).count();
+		if (existingUsers > 0) {
 			UserInfo oldUser = databaseRepository.getUserInfoDao().asQueryable().where((builder, root) -> builder.equal(root.get("email"), loginConfirmationEmail.getEmail())).getSingle();
-		if (oldUser != null) {
 			mergeNewUserToOld(user, oldUser);
 			expireUserToken(user);
 			databaseRepository.getLoginConfirmationEmailDao().createOrUpdate(loginConfirmationEmail);

dmp-frontend/src/app/ui/auth/login/email-confirmation/email-confirmation.component.ts

@@ -62,7 +62,12 @@ export class EmailConfirmation extends BaseComponent implements OnInit {
 	}
 
 	onCallbackError(error: any) {
+		if (error.status === 302) {
+			this.uiNotificationService.snackBarNotification(this.language.instant('EMAIL-CONFIRMATION.EMAIL-FOUND'), SnackBarNotificationLevel.Warning);
+			this.router.navigate(['home']);
+		} else {
 		this.uiNotificationService.snackBarNotification(this.language.instant('EMAIL-CONFIRMATION.EXPIRED-EMAIL'), SnackBarNotificationLevel.Error);
 		this.router.navigate(['login']);
 		}
+	}
 }

dmp-frontend/src/assets/i18n/en.json

@@ -146,7 +146,8 @@
 		"REQUEST-EMAIL-HEADER": "We are almost done! Please fill your e-mail.",
 		"REQUEST-EMAIL-TEXT": "You will need to confirm it to use the application.",
 		"SUBMIT": "Submit",
-		"SENT-EMAIL-HEADER": "Email was send!"
+		"SENT-EMAIL-HEADER": "Email was send!",
+		"EMAIL-FOUND": "Email is already confirmed"
 	},
 	"HOME": {
 		"DMPS": "DMPs",