feat: 增加简化版json数据

backend/services/neo4j_service.go

@@ -215,6 +215,69 @@ func (s *Neo4jService) GetStats() map[string]int {
 	}
 }
 
+// GetSimpleGraphData 获取简化的图数据，仅保留核心信息，适合 LLM 处理
+func (s *Neo4jService) GetSimpleGraphData() models.SimpleGraphData {
+	ctx := context.Background()
+	var nodes []models.SimpleNode
+	var edges []models.SimpleEdge
+
+	nodeResult, err := neo4j.ExecuteQuery(ctx, s.driver,
+		"MATCH (n) RETURN n",
+		map[string]any{},
+		neo4j.EagerResultTransformer,
+	)
+	if err != nil {
+		fmt.Printf("Error querying nodes: %v\n", err)
+		return models.SimpleGraphData{}
+	}
+	for _, record := range nodeResult.Records {
+		if v, ok := record.Get("n"); ok {
+			if n, ok := v.(neo4j.Node); ok {
+				props := n.Props
+				node := models.SimpleNode{
+					ID:    getStr(props, "id"),
+					Label: getStr(props, "label"),
+					Type:  getStr(props, "type"),
+				}
+				nodes = append(nodes, node)
+			}
+		}
+	}
+
+	edgeResult, err := neo4j.ExecuteQuery(ctx, s.driver,
+		"MATCH (a)-[r]->(b) RETURN a.id AS source, b.id AS target, r",
+		map[string]any{},
+		neo4j.EagerResultTransformer,
+	)
+	if err != nil {
+		fmt.Printf("Error querying edges: %v\n", err)
+		return models.SimpleGraphData{Nodes: nodes}
+	}
+	for _, record := range edgeResult.Records {
+		source, _ := record.Get("source")
+		target, _ := record.Get("target")
+		v, _ := record.Get("r")
+		if rel, ok := v.(neo4j.Relationship); ok {
+			props := rel.Props
+			edge := models.SimpleEdge{
+				Source: getStr(props, "source"),
+				Target: getStr(props, "target"),
+				Type:   rel.Type,
+				Label:  getStr(props, "label"),
+			}
+			if s, ok := source.(string); ok {
+				edge.Source = s
+			}
+			if t, ok := target.(string); ok {
+				edge.Target = t
+			}
+			edges = append(edges, edge)
+		}
+	}
+
+	return models.SimpleGraphData{Nodes: nodes, Edges: edges}
+}
+
 func neo4jNodeToModel(n neo4j.Node) models.Node {
 	props := n.Props
 	node := models.Node{