| | |
| | | "fmt" |
| | | "os" |
| | | "path/filepath" |
| | | "sort" |
| | | "strings" |
| | | |
| | | _ "github.com/mattn/go-sqlite3" |
| | |
| | | affected, _ := result.RowsAffected() |
| | | return int(affected), nil |
| | | } |
| | | |
| | | // GetRelationStats 获取关系类型分布统计 |
| | | func (s *Store) GetRelationStats() (map[string]int, error) { |
| | | rows, err := s.db.Query(` |
| | | SELECT relation, COUNT(*) as count |
| | | FROM edges |
| | | GROUP BY relation |
| | | ORDER BY count DESC |
| | | `) |
| | | if err != nil { |
| | | return nil, fmt.Errorf("查询关系统计失败: %w", err) |
| | | } |
| | | defer rows.Close() |
| | | |
| | | stats := make(map[string]int) |
| | | for rows.Next() { |
| | | var relation string |
| | | var count int |
| | | if err := rows.Scan(&relation, &count); err != nil { |
| | | return nil, fmt.Errorf("扫描关系统计失败: %w", err) |
| | | } |
| | | stats[relation] = count |
| | | } |
| | | |
| | | if err := rows.Err(); err != nil { |
| | | return nil, fmt.Errorf("遍历关系统计失败: %w", err) |
| | | } |
| | | |
| | | return stats, nil |
| | | } |
| | | |
| | | // FindNodesByKeyword 根据关键词查找节点(模糊匹配标题、路径、标签、实体) |
| | | func (s *Store) FindNodesByKeyword(keyword string) ([]*graph.Node, error) { |
| | | keyword = "%" + keyword + "%" |
| | | query := ` |
| | | SELECT id, path, title, section, tags, entities, wikilinks, content_fts |
| | | FROM nodes |
| | | WHERE title LIKE ? OR path LIKE ? OR tags LIKE ? OR entities LIKE ? |
| | | LIMIT 20 |
| | | ` |
| | | rows, err := s.db.Query(query, keyword, keyword, keyword, keyword) |
| | | if err != nil { |
| | | return nil, fmt.Errorf("查询节点失败: %w", err) |
| | | } |
| | | defer rows.Close() |
| | | |
| | | var nodes []*graph.Node |
| | | for rows.Next() { |
| | | var n graph.Node |
| | | var tagsJSON, entitiesJSON, wikilinksJSON string |
| | | var content sql.NullString |
| | | |
| | | err := rows.Scan(&n.ID, &n.Path, &n.Title, &n.Section, |
| | | &tagsJSON, &entitiesJSON, &wikilinksJSON, &content) |
| | | if err != nil { |
| | | return nil, fmt.Errorf("扫描节点失败: %w", err) |
| | | } |
| | | |
| | | json.Unmarshal([]byte(tagsJSON), &n.Tags) |
| | | json.Unmarshal([]byte(entitiesJSON), &n.Entities) |
| | | json.Unmarshal([]byte(wikilinksJSON), &n.Wikilinks) |
| | | if content.Valid { |
| | | n.Content = content.String |
| | | } |
| | | |
| | | nodes = append(nodes, &n) |
| | | } |
| | | |
| | | if err := rows.Err(); err != nil { |
| | | return nil, fmt.Errorf("遍历节点失败: %w", err) |
| | | } |
| | | |
| | | return nodes, nil |
| | | } |
| | | |
| | | // GetNodeEdges 获取节点的关联边(支持关系类型过滤和深度查询) |
| | | func (s *Store) GetNodeEdges(nodeID int64, relation string, depth int) ([]*graph.Edge, error) { |
| | | if depth < 1 { |
| | | depth = 1 |
| | | } |
| | | if depth > 3 { |
| | | depth = 3 |
| | | } |
| | | |
| | | var edges []*graph.Edge |
| | | visited := make(map[int64]bool) |
| | | currentLevel := []int64{nodeID} |
| | | |
| | | for d := 0; d < depth; d++ { |
| | | var nextLevel []int64 |
| | | |
| | | for _, id := range currentLevel { |
| | | if visited[id] && d > 0 { |
| | | continue |
| | | } |
| | | visited[id] = true |
| | | |
| | | query := ` |
| | | SELECT id, from_node, to_node, relation, label |
| | | FROM edges |
| | | WHERE from_node = ? |
| | | ` |
| | | args := []interface{}{id} |
| | | |
| | | if relation != "" { |
| | | query += " AND relation = ?" |
| | | args = append(args, relation) |
| | | } |
| | | |
| | | rows, err := s.db.Query(query, args...) |
| | | if err != nil { |
| | | return nil, fmt.Errorf("查询边失败: %w", err) |
| | | } |
| | | |
| | | for rows.Next() { |
| | | var e graph.Edge |
| | | var edgeID int64 |
| | | if err := rows.Scan(&edgeID, &e.FromNode, &e.ToNode, &e.Relation, &e.Label); err != nil { |
| | | rows.Close() |
| | | return nil, fmt.Errorf("扫描边失败: %w", err) |
| | | } |
| | | edges = append(edges, &e) |
| | | nextLevel = append(nextLevel, e.ToNode) |
| | | } |
| | | rows.Close() |
| | | } |
| | | |
| | | currentLevel = nextLevel |
| | | } |
| | | |
| | | return edges, nil |
| | | } |
| | | |
| | | // FindRelatedNodes 查找与关键词相关的所有节点(通过共同标签、实体、wikilink) |
| | | func (s *Store) FindRelatedNodes(keyword string, topN int) ([]RelatedNode, error) { |
| | | // 先找到匹配关键词的节点 |
| | | keyword = "%" + keyword + "%" |
| | | query := ` |
| | | SELECT id, path, title, section, tags, entities |
| | | FROM nodes |
| | | WHERE title LIKE ? OR path LIKE ? OR tags LIKE ? OR entities LIKE ? |
| | | LIMIT 5 |
| | | ` |
| | | rows, err := s.db.Query(query, keyword, keyword, keyword, keyword) |
| | | if err != nil { |
| | | return nil, fmt.Errorf("查询节点失败: %w", err) |
| | | } |
| | | defer rows.Close() |
| | | |
| | | var seedNodes []*graph.Node |
| | | for rows.Next() { |
| | | var n graph.Node |
| | | var tagsJSON, entitiesJSON string |
| | | err := rows.Scan(&n.ID, &n.Path, &n.Title, &n.Section, &tagsJSON, &entitiesJSON) |
| | | if err != nil { |
| | | return nil, fmt.Errorf("扫描节点失败: %w", err) |
| | | } |
| | | json.Unmarshal([]byte(tagsJSON), &n.Tags) |
| | | json.Unmarshal([]byte(entitiesJSON), &n.Entities) |
| | | seedNodes = append(seedNodes, &n) |
| | | } |
| | | |
| | | if len(seedNodes) == 0 { |
| | | return []RelatedNode{}, nil |
| | | } |
| | | |
| | | // 收集种子节点的标签和实体 |
| | | tagSet := make(map[string]bool) |
| | | entitySet := make(map[string]bool) |
| | | for _, n := range seedNodes { |
| | | for _, tag := range n.Tags { |
| | | tagSet[tag] = true |
| | | } |
| | | for _, entity := range n.Entities { |
| | | entitySet[entity] = true |
| | | } |
| | | } |
| | | |
| | | // 查找共享标签或实体的节点 |
| | | relevanceMap := make(map[int64]int) |
| | | pathMap := make(map[int64]string) |
| | | titleMap := make(map[int64]string) |
| | | sectionMap := make(map[int64]string) |
| | | tagsMap := make(map[int64][]string) |
| | | |
| | | // 通过标签查找 |
| | | for tag := range tagSet { |
| | | tagPattern := "%" + tag + "%" |
| | | rows, err := s.db.Query(` |
| | | SELECT id, path, title, section, tags |
| | | FROM nodes |
| | | WHERE tags LIKE ? |
| | | `, tagPattern) |
| | | if err != nil { |
| | | continue |
| | | } |
| | | |
| | | for rows.Next() { |
| | | var id int64 |
| | | var path, title, section, tagsJSON string |
| | | if err := rows.Scan(&id, &path, &title, §ion, &tagsJSON); err != nil { |
| | | rows.Close() |
| | | continue |
| | | } |
| | | relevanceMap[id]++ |
| | | pathMap[id] = path |
| | | titleMap[id] = title |
| | | sectionMap[id] = section |
| | | var tags []string |
| | | json.Unmarshal([]byte(tagsJSON), &tags) |
| | | tagsMap[id] = tags |
| | | } |
| | | rows.Close() |
| | | } |
| | | |
| | | // 通过实体查找 |
| | | for entity := range entitySet { |
| | | entityPattern := "%" + entity + "%" |
| | | rows, err := s.db.Query(` |
| | | SELECT id, path, title, section, tags |
| | | FROM nodes |
| | | WHERE entities LIKE ? |
| | | `, entityPattern) |
| | | if err != nil { |
| | | continue |
| | | } |
| | | |
| | | for rows.Next() { |
| | | var id int64 |
| | | var path, title, section, tagsJSON string |
| | | if err := rows.Scan(&id, &path, &title, §ion, &tagsJSON); err != nil { |
| | | rows.Close() |
| | | continue |
| | | } |
| | | relevanceMap[id]++ |
| | | pathMap[id] = path |
| | | titleMap[id] = title |
| | | sectionMap[id] = section |
| | | var tags []string |
| | | json.Unmarshal([]byte(tagsJSON), &tags) |
| | | tagsMap[id] = tags |
| | | } |
| | | rows.Close() |
| | | } |
| | | |
| | | // 转换为结果列表 |
| | | var results []RelatedNode |
| | | for id, relevance := range relevanceMap { |
| | | results = append(results, RelatedNode{ |
| | | ID: id, |
| | | Path: pathMap[id], |
| | | Title: titleMap[id], |
| | | Section: sectionMap[id], |
| | | Tags: tagsMap[id], |
| | | Relevance: relevance, |
| | | }) |
| | | } |
| | | |
| | | // 按相关度排序 |
| | | sort.Slice(results, func(i, j int) bool { |
| | | return results[i].Relevance > results[j].Relevance |
| | | }) |
| | | |
| | | // 限制返回数量 |
| | | if topN > 0 && len(results) > topN { |
| | | results = results[:topN] |
| | | } |
| | | |
| | | return results, nil |
| | | } |
| | | |
| | | // RelatedNode 相关节点 |
| | | type RelatedNode struct { |
| | | ID int64 `json:"id"` |
| | | Path string `json:"path"` |
| | | Title string `json:"title"` |
| | | Section string `json:"section"` |
| | | Tags []string `json:"tags"` |
| | | Relevance int `json:"relevance"` |
| | | } |