Add Label Propagation to business facade

Author: IoannisPanagiotas

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

@@ -36,6 +36,7 @@
 import org.neo4j.gds.core.loading.validation.NoAlgorithmValidation;
 import org.neo4j.gds.core.loading.validation.NodePropertyAnyExistsGraphStoreValidation;
 import org.neo4j.gds.core.loading.validation.NodePropertyTypeGraphStoreValidation;
+import org.neo4j.gds.core.loading.validation.SeedPropertyGraphStoreValidation;
 import org.neo4j.gds.core.loading.validation.UndirectedOnlyGraphStoreValidation;
 import org.neo4j.gds.hdbscan.HDBScanParameters;
 import org.neo4j.gds.hdbscan.Labels;
@@ -45,6 +46,8 @@
 import org.neo4j.gds.kcore.KCoreDecompositionResult;
 import org.neo4j.gds.kmeans.KmeansParameters;
 import org.neo4j.gds.kmeans.KmeansResult;
+import org.neo4j.gds.labelpropagation.LabelPropagationParameters;
+import org.neo4j.gds.labelpropagation.LabelPropagationResult;
 import org.neo4j.gds.result.TimedAlgorithmResult;
 import org.neo4j.gds.results.ResultTransformerBuilder;
 
@@ -284,4 +287,35 @@ public <TR> CompletableFuture<TR> kMeans(
         ).thenApply(resultTransformerBuilder.build(graphResources));
     }
 
+    public <TR> CompletableFuture<TR> labelPropagation(
+        GraphName graphName,
+        GraphParameters graphParameters,
+        Optional<String> relationshipProperty,
+        LabelPropagationParameters parameters,
+        JobId jobId,
+        boolean logProgress,
+        ResultTransformerBuilder<TimedAlgorithmResult<LabelPropagationResult>, 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.labelPropagation(
+            graph,
+            parameters,
+            jobId,
+            logProgress
+
+        ).thenApply(resultTransformerBuilder.build(graphResources));
+    }
+
+
 }

core/src/main/java/org/neo4j/gds/core/loading/validation/SeedPropertyGraphStoreValidation.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) "Neo4j"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Neo4j is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.neo4j.gds.core.loading.validation;
+
+import org.neo4j.gds.NodeLabel;
+import org.neo4j.gds.RelationshipType;
+import org.neo4j.gds.api.GraphStore;
+
+import java.util.Collection;
+
+public class SeedPropertyGraphStoreValidation extends  GraphStoreValidation {
+
+    private GraphStoreValidation validation;
+
+    public SeedPropertyGraphStoreValidation(GraphStoreValidation validation) {this.validation = validation;}
+
+    public static SeedPropertyGraphStoreValidation create(String seedProperty){
+        if (seedProperty == null){
+            return  new SeedPropertyGraphStoreValidation(new NoAlgorithmValidation());
+        }else {
+            return  new SeedPropertyGraphStoreValidation(new NodePropertyAllExistsGraphStoreValidation("seedProperty"));
+        }
+    }
+    @Override
+    protected void validateAlgorithmRequirements(
+        GraphStore graphStore,
+        Collection<NodeLabel> selectedLabels,
+        Collection<RelationshipType> selectedRelationshipTypes
+    ) {
+        validation.validateAlgorithmRequirements(graphStore,selectedLabels,selectedRelationshipTypes);
+    }
+}