From 9a40951aa31f225e39eb1036094b9c75c981bdd1 Mon Sep 17 00:00:00 2001
From: Slawomir Wieczorek <slawomir.wieczorek@bedag.ch>
Date: Tue, 3 Dec 2024 08:12:56 +0100
Subject: [PATCH] filter by an email

---
 .../hellodata/portal/user/service/UserService.java    | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/hello-data-portal/hello-data-portal-api/src/main/java/ch/bedag/dap/hellodata/portal/user/service/UserService.java b/hello-data-portal/hello-data-portal-api/src/main/java/ch/bedag/dap/hellodata/portal/user/service/UserService.java
index 67a3a79e..d476d04b 100644
--- a/hello-data-portal/hello-data-portal-api/src/main/java/ch/bedag/dap/hellodata/portal/user/service/UserService.java
+++ b/hello-data-portal/hello-data-portal-api/src/main/java/ch/bedag/dap/hellodata/portal/user/service/UserService.java
@@ -397,9 +397,16 @@ public void validateUserHasAccessToContext(String contextKey, String reason) {
 
     public List<AdUserDto> searchUser(String email) {
         if (email == null || email.length() < 3) {
-            return new ArrayList<>();
+            return Collections.emptyList();
         }
-        return new ArrayList<>(new LinkedHashSet<>(userLookupProviderManager.searchUserByEmail(email)));
+
+        List<AdUserDto> users = userLookupProviderManager.searchUserByEmail(email);
+        Set<String> uniqueEmails = new HashSet<>();
+
+        return users.stream()
+                .filter(Objects::nonNull)
+                .filter(user -> uniqueEmails.add(user.getEmail()))
+                .collect(Collectors.toList());
     }
 
     @Transactional(readOnly = true)