package graph_queries

import "fmt"

func defaultEdgeQuery(edgeLimit int, includeBNodes bool) string {
	bnodeFilter := ""
	if !includeBNodes {
		bnodeFilter = "FILTER(!isBlank(?s) && !isBlank(?o))"
	}

	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#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>

SELECT ?s ?p ?o
WHERE {
  {
    VALUES ?p { rdf:type }
    ?s ?p ?o .
    ?o rdf:type owl:Class .
  }
  UNION
  {
    VALUES ?p { rdfs:subClassOf }
    ?s ?p ?o .
  }
  FILTER(!isLiteral(?o))
  %s
}
LIMIT %d
`, bnodeFilter, edgeLimit)
}