Method getStats

src/db/queries.ts:1783–1826

* Get graph statistics

()

   * Get graph statistics
   */
  getStats(): GraphStats {
    // Single query for all three aggregate counts
    const counts = this.db.prepare(`
      SELECT
        (SELECT COUNT(*) FROM nodes) AS node_count,
        (SELECT COUNT(*) FROM edges) AS edge_count,
        (SELECT COUNT(*) FROM files) AS file_count
    `).get() as { node_count: number; edge_count: number; file_count: number };

    const nodesByKind = {} as Record<NodeKind, number>;
    const nodeKindRows = this.db
      .prepare('SELECT kind, COUNT(*) as count FROM nodes GROUP BY kind')
      .all() as Array<{ kind: string; count: number }>;
    for (const row of nodeKindRows) {
      nodesByKind[row.kind as NodeKind] = row.count;
    }

    const edgesByKind = {} as Record<EdgeKind, number>;
    const edgeKindRows = this.db
      .prepare('SELECT kind, COUNT(*) as count FROM edges GROUP BY kind')
      .all() as Array<{ kind: string; count: number }>;
    for (const row of edgeKindRows) {
      edgesByKind[row.kind as EdgeKind] = row.count;
    }

    const filesByLanguage = {} as Record<Language, number>;
    const languageRows = this.db
      .prepare('SELECT language, COUNT(*) as count FROM files GROUP BY language')
      .all() as Array<{ language: string; count: number }>;
    for (const row of languageRows) {
      filesByLanguage[row.language as Language] = row.count;
    }

    return {
      nodeCount: counts.node_count,
      edgeCount: counts.edge_count,
      fileCount: counts.file_count,
      nodesByKind,
      edgesByKind,
      filesByLanguage,
      dbSizeBytes: 0, // Set by caller using DatabaseConnection.getSize()
      lastUpdated: Date.now(),
    };
  }

  // ===========================================================================
  // Project Metadata