Add Louvain to business facade

Author: IoannisPanagiotas

algorithms-compute-business-facade/src/main/java/org/neo4j/gds/community/CommunityComputeBusinessFacade.java

@@ -51,6 +51,8 @@
 import org.neo4j.gds.labelpropagation.LabelPropagationResult;
 import org.neo4j.gds.leiden.LeidenParameters;
 import org.neo4j.gds.leiden.LeidenResult;
+import org.neo4j.gds.louvain.LouvainParameters;
+import org.neo4j.gds.louvain.LouvainResult;
 import org.neo4j.gds.result.TimedAlgorithmResult;
 import org.neo4j.gds.results.ResultTransformerBuilder;
 import org.neo4j.gds.triangle.LocalClusteringCoefficientParameters;
@@ -382,6 +384,35 @@ public <TR> CompletableFuture<TR> leiden(
         ).thenApply(resultTransformerBuilder.build(graphResources));
     }
 
+    public <TR> CompletableFuture<TR> louvain(
+        GraphName graphName,
+        GraphParameters graphParameters,
+        Optional<String> relationshipProperty,
+        LouvainParameters parameters,
+        JobId jobId,
+        boolean logProgress,
+        ResultTransformerBuilder<TimedAlgorithmResult<LouvainResult>, TR> resultTransformerBuilder
+    ) {
+        // Fetch the Graph the algorithm will operate on
+        var graphResources = graphStoreCatalogService.fetchGraphResources(
+            graphName,
+            graphParameters,
+            relationshipProperty,
+            SeedPropertyGraphStoreValidation.create(parameters.seedProperty()),
+            Optional.empty(),
+            user,
+            databaseId
+        );
+        var graph = graphResources.graph();
+
+        return computeFacade.louvain(
+            graph,
+            parameters,
+            jobId,
+            logProgress
+
+        ).thenApply(resultTransformerBuilder.build(graphResources));
+    }
 
 
 }