Add getSecret method to ProjectMetadata (elastic#125830)

* Add getSecret method to ProjectState

Author: jfreden

server/src/main/java/org/elasticsearch/cluster/metadata/ProjectMetadata.java

@@ -24,6 +24,8 @@
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.VersionedNamedWriteable;
 import org.elasticsearch.common.regex.Regex;
+import org.elasticsearch.common.settings.ProjectSecrets;
+import org.elasticsearch.common.settings.SecureString;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.ArrayUtils;
 import org.elasticsearch.common.util.Maps;
@@ -1103,6 +1105,10 @@ static boolean isStateEquals(ProjectMetadata project1, ProjectMetadata project2)
         return true;
     }
 
+    public Optional<SecureString> getSecret(String key) {
+        return Optional.ofNullable(this.<ProjectSecrets>custom(ProjectSecrets.TYPE)).map(secrets -> secrets.getSettings().getString(key));
+    }
+
     public static ProjectMetadata.Builder builder(ProjectId id) {
         return new ProjectMetadata.Builder().id(id);
     }

server/src/main/java/org/elasticsearch/cluster/project/ProjectResolver.java

@@ -39,6 +39,14 @@ default ProjectMetadata getProjectMetadata(ClusterState clusterState) {
         return getProjectMetadata(clusterState.metadata());
     }
 
+    default boolean hasProject(ClusterState clusterState) {
+        return hasProject(clusterState.metadata());
+    }
+
+    default boolean hasProject(Metadata metadata) {
+        return metadata.hasProject(getProjectId());
+    }
+
     // TODO: What happens if the context does not have a project? throw or return null?
     default ProjectState getProjectState(ClusterState clusterState) {
         final ProjectId id = getProjectId();