backend: support external SPARQL and named-graph snapshots

backend_go/selection_queries/neighbors.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"fmt"
 	"strings"
+
+	"visualizador_instanciados/backend_go/queryscope"
 )
 
 func neighborsQuery(selectedNodes []NodeRef, includeBNodes bool) string {
@@ -26,6 +28,36 @@ func neighborsQuery(selectedNodes []NodeRef, includeBNodes bool) string {
 	}
 
 	values := strings.Join(valuesTerms, " ")
+	pattern := queryscope.NamedGraph(fmt.Sprintf(`
+{
+  VALUES ?sel { %s }
+  BIND(?sel AS ?s)
+  VALUES ?p { rdf:type }
+  ?s ?p ?o .
+}
+UNION
+{
+  VALUES ?sel { %s }
+  VALUES ?p { rdf:type }
+  ?s ?p ?sel .
+  BIND(?sel AS ?o)
+}
+UNION
+{
+  VALUES ?sel { %s }
+  BIND(?sel AS ?s)
+  VALUES ?p { rdfs:subClassOf }
+  ?s ?p ?o .
+}
+UNION
+{
+  VALUES ?sel { %s }
+  VALUES ?p { rdfs:subClassOf }
+  ?s ?p ?sel .
+  BIND(?sel AS ?o)
+}
+`, values, values, values, values))
+
 	return fmt.Sprintf(`
 PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
@@ -33,40 +65,12 @@ PREFIX owl: <http://www.w3.org/2002/07/owl#>
 
 SELECT DISTINCT ?s ?p ?o
 WHERE {
-  {
-    VALUES ?sel { %s }
-    BIND(?sel AS ?s)
-    VALUES ?p { rdf:type }
-    ?s ?p ?o .
-    ?o rdf:type owl:Class .
-  }
-  UNION
-  {
-    VALUES ?sel { %s }
-    VALUES ?p { rdf:type }
-    ?s ?p ?sel .
-    ?sel rdf:type owl:Class .
-    BIND(?sel AS ?o)
-  }
-  UNION
-  {
-    VALUES ?sel { %s }
-    BIND(?sel AS ?s)
-    VALUES ?p { rdfs:subClassOf }
-    ?s ?p ?o .
-  }
-  UNION
-  {
-    VALUES ?sel { %s }
-    VALUES ?p { rdfs:subClassOf }
-    ?s ?p ?sel .
-    BIND(?sel AS ?o)
-  }
+%s
   FILTER(!isLiteral(?o))
   FILTER(?s != ?o)
   %s
 }
-`, values, values, values, values, bnodeFilter)
+`, pattern, bnodeFilter)
 }
 
 func runNeighbors(ctx context.Context, q Querier, idx Index, selectedIDs []uint32, includeBNodes bool) (Result, error) {