Intermediate commit: Fixed a bug with mapping definition during index

creation

Related to #469 (closed)

src/main/java/at/ac/uibk/gitsearch/service/GitlabService.java

@@ -375,6 +375,26 @@ public class GitlabService {
         return groupApi.getSubGroups(groupId);
     }
 
+    public boolean isMember(long gitProjectId, at.ac.uibk.gitsearch.domain.User user) throws GitLabApiException {
+        try {
+            org.gitlab4j.api.models.User gitUser = this.gitLabRepository.getAdminGitLabApi().getUserApi().getUserByEmail(user.getEmail());
+
+            if (gitUser == null) {
+                return false;
+            }
+
+            return gitLabRepository.getAdminGitLabApi().getProjectApi().getMember(gitProjectId, gitUser.getId(), true) != null;
+        } catch (final GitLabApiException e) {
+            if (e.getHttpStatus() == 404) {
+                return false;
+            }
+            throw e;
+        } catch (IllegalArgumentException e) {
+            // email of user invalid
+            return false;
+        }
+    }
+
     /**
      * Utility function used to set the default JGIT credentials to use the provided
      * OAuth2 token