feat(web): 增加EL表达式转换

service-web/client/test.ts

@@ -0,0 +1,84 @@
+type Node = {
+  id: string
+  type: 'start' | 'end' | 'normal'
+}
+
+type Edge = {
+  source: string
+  target: string
+}
+
+// language=JSON
+let data = JSON.parse('{\n  "nodes": [\n    {\n      "id": "A",\n      "type": "start",\n      "position": {\n        "x": 8,\n        "y": 272\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    },\n    {\n      "id": "F",\n      "type": "end",\n      "position": {\n        "x": 1439.5556937134281,\n        "y": 282.2797340760818\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    },\n    {\n      "id": "C",\n      "type": "normal",\n      "position": {\n        "x": 902.6781018665707,\n        "y": 115.31234529524048\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    },\n    {\n      "id": "B",\n      "type": "normal",\n      "position": {\n        "x": 338,\n        "y": 287\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    },\n    {\n      "id": "E",\n      "type": "normal",\n      "position": {\n        "x": 1086.6322978498904,\n        "y": 371.3061114283591\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": true,\n      "dragging": false\n    },\n    {\n      "id": "D",\n      "type": "normal",\n      "position": {\n        "x": 700.0944461714178,\n        "y": 369.84258971430364\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    }\n  ],\n  "edges": [\n    {\n      "source": "A",\n      "target": "B",\n      "id": "xy-edge__A-B"\n    },\n    {\n      "source": "B",\n      "target": "C",\n      "id": "xy-edge__B-C"\n    },\n    {\n      "source": "C",\n      "target": "F",\n      "id": "xy-edge__C-F"\n    },\n    {\n      "source": "D",\n      "target": "E",\n      "id": "xy-edge__D-E"\n    },\n    {\n      "source": "B",\n      "target": "D",\n      "id": "xy-edge__B-D"\n    },\n    {\n      "source": "E",\n      "target": "F",\n      "id": "xy-edge__E-F"\n    }\n  ],\n  "data": {\n    "A": {\n      "inputs": {\n        "name": {\n          "type": "text"\n        },\n        "description": {\n          "type": "text",\n          "description": "文件描述"\n        }\n      }\n    },\n    "C": {\n      "model": "qwen3",\n      "outputs": {\n        "text": {\n          "type": "string"\n        }\n      },\n      "systemPrompt": "你是个沙雕"\n    },\n    "B": {\n      "count": 3,\n      "score": 0.75,\n      "knowledgeId": 3585368238960640,\n      "query": "hello world"\n    },\n    "E": {\n      "type": "python",\n      "content": "code=\'hello\'\\nprint(code)"\n    },\n    "D": {\n      "model": "qwen3",\n      "outputs": {\n        "text": {\n          "type": "string"\n        }\n      },\n      "systemPrompt": "你是个聪明人"\n    }\n  }\n}')
+
+// THEN(A, B, WHEN(C, THEN(D, E)), F)
+
+function buildEL(nodes: Node[], edges: Edge[]): string {
+  // Build adjacency list and in-degree map
+  const adjList = new Map<string, string[]>()
+  const inDegree = new Map<string, number>()
+  for (const node of nodes) {
+    adjList.set(node.id, [])
+    inDegree.set(node.id, 0)
+  }
+  for (const edge of edges) {
+    adjList.get(edge.source)!.push(edge.target)
+    inDegree.set(edge.target, inDegree.get(edge.target)! + 1)
+  }
+
+  // Compute levels (longest path from start)
+  const levelMap = new Map<string, number>()
+
+  function computeLevel(nodeId: string): number {
+    if (levelMap.has(nodeId)) return levelMap.get(nodeId)!
+    const preds = edges.filter(e => e.target === nodeId).map(e => e.source)
+    const level = preds.length === 0 ? 0 : Math.max(...preds.map(p => computeLevel(p))) + 1
+    levelMap.set(nodeId, level)
+    return level
+  }
+
+  for (const node of nodes) computeLevel(node.id)
+
+  // Group nodes by level
+  const maxLevel = Math.max(...Array.from(levelMap.values()))
+  const levels: string[][] = Array.from({length: maxLevel + 1}, () => [])
+  for (const node of nodes) levels[levelMap.get(node.id)!].push(node.id)
+
+  // Build EL expression
+  const expressions: string[] = []
+  for (let i = 0; i <= maxLevel; i++) {
+    const nodesAtLevel = levels[i]
+    if (nodesAtLevel.length === 0) continue
+
+    // Identify serial chains starting from this level
+    const serialChains: string[] = []
+    for (const nodeId of nodesAtLevel) {
+      let chain = [nodeId]
+      let current = nodeId
+      while (adjList.get(current)?.length === 1) {
+        const next = adjList.get(current)![0]
+        if (inDegree.get(next) === 1 && levelMap.get(next) === i + chain.length) {
+          chain.push(next)
+          current = next
+        } else break
+      }
+      if (chain.length > 1) {
+        serialChains.push(`THEN(${chain.join(', ')})`)
+        // Remove processed nodes from their levels
+        for (let j = 1; j < chain.length; j++) {
+          const level = levelMap.get(chain[j])!
+          levels[level] = levels[level].filter(n => n !== chain[j])
+        }
+      } else {
+        serialChains.push(nodeId)
+      }
+    }
+
+    // Combine chains or nodes at this level
+    expressions.push(serialChains.length > 1 ? `WHEN(${serialChains.join(', ')})` : serialChains[0])
+  }
+
+  return `THEN(${expressions.join(', ')})`
+}
+
+console.log(buildEL(data.nodes, data.edges))