89 lines
2.8 KiB
JavaScript
89 lines
2.8 KiB
JavaScript
/**
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* ═══════════════════════════════════════════════════════════
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* MCP 工具 · 关系操作（linkNodes / unlinkNodes / getRelations）
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* ═══════════════════════════════════════════════════════════
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*
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* 签发: 铸渊 · ICE-GL-ZY001
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* 版权: 国作登字-2026-A-00037559
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*/
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'use strict';
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const { v4: uuidv4 } = require('uuid');
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const db = require('../db');
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/**
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* linkNodes — 建立节点关联
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*/
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async function linkNodes(input) {
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const { from_node_id, to_node_id, relation_type, description, created_by } = input;
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const id = uuidv4();
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const weight = input.weight || 50;
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await db.query(
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`INSERT INTO brain_relations (id, from_node_id, to_node_id, relation_type, description, weight, created_by)
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VALUES ($1, $2, $3, $4, $5, $6, $7)
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ON CONFLICT (from_node_id, to_node_id, relation_type) DO UPDATE
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SET description = EXCLUDED.description, weight = EXCLUDED.weight`,
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[id, from_node_id, to_node_id, relation_type, description || null, weight, created_by || 'system']
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);
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return { relation_id: id };
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}
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/**
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* unlinkNodes — 删除关联
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*/
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async function unlinkNodes(input) {
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const { relation_id } = input;
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const result = await db.query('DELETE FROM brain_relations WHERE id = $1', [relation_id]);
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return { success: result.rowCount > 0 };
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}
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/**
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* getRelations — 查询某节点的所有关联
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*/
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async function getRelations(input) {
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const { node_id, relation_type, direction } = input;
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const dir = direction || 'both';
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const conditions = [];
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const values = [];
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let paramIndex = 1;
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if (dir === 'outgoing' || dir === 'both') {
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conditions.push(`from_node_id = $${paramIndex}`);
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values.push(node_id);
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paramIndex++;
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}
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if (dir === 'incoming' || dir === 'both') {
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if (dir === 'both') {
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// 用 OR 合并
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conditions[0] = `(from_node_id = $1 OR to_node_id = $${paramIndex})`;
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values.push(node_id);
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paramIndex++;
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} else {
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conditions.push(`to_node_id = $${paramIndex}`);
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values.push(node_id);
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paramIndex++;
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}
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}
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if (relation_type) {
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conditions.push(`relation_type = $${paramIndex}`);
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values.push(relation_type);
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paramIndex++;
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}
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const sql = `SELECT r.*, fn.title as from_title, tn.title as to_title
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FROM brain_relations r
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LEFT JOIN brain_nodes fn ON r.from_node_id = fn.id
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LEFT JOIN brain_nodes tn ON r.to_node_id = tn.id
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WHERE ${conditions.join(' AND ')}
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ORDER BY r.weight DESC, r.created_at DESC`;
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const result = await db.query(sql, values);
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return { relations: result.rows };
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}
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module.exports = { linkNodes, unlinkNodes, getRelations };
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