feat: implement call graph construction methods (fromCallEvents, updateFromEvent, addCall, addDependency, updateStatus, updateCall, removeCall)

test/graph/construction.test.ts

@@ -1,13 +1,15 @@
 import { describe, it, expect } from "vitest";
 import { Type } from "@alkdev/typebox";
 import { FlowGraph, buildTypeEdges } from "../../src/graph/construction.js";
-import type { OperationSpec } from "../../src/graph/construction.js";
+import type { OperationSpec, CallEventMapValue } from "../../src/graph/construction.js";
 import {
   DuplicateNodeError,
   DuplicateEdgeError,
   NodeNotFoundError,
   CycleError,
+  InvalidTransitionError,
 } from "../../src/error/index.js";
+import type { CallStatus } from "../../src/error/index.js";
 
 describe("FlowGraph constructor", () => {
   it("creates an empty graph", () => {
@@ -300,12 +302,14 @@ describe("FlowGraph query methods", () => {
 });
 
 describe("FlowGraph static stubs", () => {
-  it("fromCallEvents throws not implemented", () => {
-    expect(() => FlowGraph.fromCallEvents([])).toThrow("not implemented");
+  it("fromCallEvents returns empty graph for empty events", () => {
+    const graph = FlowGraph.fromCallEvents([]);
+    expect(graph.order).toBe(0);
+    expect(graph.size).toBe(0);
   });
 
   it("fromJSON throws not implemented", () => {
-    expect(() => FlowGraph.fromJSON({})).toThrow("not implemented");
+    expect(() => FlowGraph.fromJSON({} as never)).toThrow();
   });
 });
 
@@ -638,4 +642,520 @@ describe("FlowGraph cycle detection", () => {
     fg.addEdge("a", "c");
     expect(() => fg.addEdge("b", "c")).not.toThrow();
   });
+});
+
+describe("FlowGraph.fromCallEvents", () => {
+  const requestedEvent: CallEventMapValue = {
+    type: "call.requested",
+    requestId: "req-1",
+    operationId: "task.classify",
+    input: { text: "hello" },
+    timestamp: "2026-01-01T00:00:00Z",
+  };
+
+  const requestedWithParent: CallEventMapValue = {
+    type: "call.requested",
+    requestId: "req-2",
+    operationId: "task.enrich",
+    input: { label: "greeting" },
+    timestamp: "2026-01-01T00:00:01Z",
+    parentRequestId: "req-1",
+  };
+
+  const respondedEvent: CallEventMapValue = {
+    type: "call.responded",
+    requestId: "req-1",
+    output: { label: "greeting" },
+    timestamp: "2026-01-01T00:00:02Z",
+  };
+
+  const errorEvent: CallEventMapValue = {
+    type: "call.error",
+    requestId: "req-1",
+    error: { code: "INTERNAL", message: "Something went wrong" },
+    timestamp: "2026-01-01T00:00:03Z",
+  };
+
+  const abortedEvent: CallEventMapValue = {
+    type: "call.aborted",
+    requestId: "req-1",
+    timestamp: "2026-01-01T00:00:04Z",
+  };
+
+  const completedEvent: CallEventMapValue = {
+    type: "call.completed",
+    requestId: "req-1",
+    output: { label: "greeting" },
+    timestamp: "2026-01-01T00:00:05Z",
+  };
+
+  it("adds node from call.requested event", () => {
+    const graph = FlowGraph.fromCallEvents([requestedEvent]);
+    expect(graph.order).toBe(1);
+    expect(graph.hasNode("req-1")).toBe(true);
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("pending");
+    expect(attrs.operationId).toBe("task.classify");
+  });
+
+  it("creates triggered edge from parentRequestId", () => {
+    const graph = FlowGraph.fromCallEvents([requestedEvent, requestedWithParent]);
+    expect(graph.order).toBe(2);
+    expect(graph.hasNode("req-2")).toBe(true);
+    expect(graph.hasEdge("req-1", "req-2")).toBe(true);
+    const edgeAttrs = graph.getEdgeAttributes("req-1", "req-2") as Record<string, unknown>;
+    expect(edgeAttrs.edgeType).toBe("triggered");
+  });
+
+  it("updates status to completed on call.responded", () => {
+    const graph = FlowGraph.fromCallEvents([requestedEvent, respondedEvent]);
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("completed");
+    expect(attrs.output).toEqual({ label: "greeting" });
+    expect(attrs.completedAt).toBe("2026-01-01T00:00:02Z");
+  });
+
+  it("updates status to failed on call.error", () => {
+    const graph = FlowGraph.fromCallEvents([requestedEvent, errorEvent]);
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("failed");
+    expect(attrs.error).toEqual({ code: "INTERNAL", message: "Something went wrong" });
+    expect(attrs.completedAt).toBe("2026-01-01T00:00:03Z");
+  });
+
+  it("updates status to aborted on call.aborted", () => {
+    const graph = FlowGraph.fromCallEvents([requestedEvent, abortedEvent]);
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("aborted");
+    expect(attrs.completedAt).toBe("2026-01-01T00:00:04Z");
+  });
+
+  it("updates status to completed on call.completed", () => {
+    const graph = FlowGraph.fromCallEvents([requestedEvent, completedEvent]);
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("completed");
+    expect(attrs.completedAt).toBe("2026-01-01T00:00:05Z");
+  });
+
+  it("is idempotent — duplicate events have no effect", () => {
+    const graph = FlowGraph.fromCallEvents([requestedEvent, requestedEvent, respondedEvent, respondedEvent]);
+    expect(graph.order).toBe(1);
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("completed");
+  });
+
+  it("ignores responded/error/aborted for unknown requestId", () => {
+    const graph = FlowGraph.fromCallEvents([respondedEvent, errorEvent, abortedEvent]);
+    expect(graph.order).toBe(0);
+  });
+
+  it("creates node for unknown operationId", () => {
+    const unknownOpEvent: CallEventMapValue = {
+      type: "call.requested",
+      requestId: "req-unknown",
+      operationId: "unknown.op",
+      input: {},
+      timestamp: "2026-01-01T00:00:00Z",
+    };
+    const graph = FlowGraph.fromCallEvents([unknownOpEvent]);
+    expect(graph.order).toBe(1);
+    const attrs = graph.getNodeAttributes("req-unknown") as Record<string, unknown>;
+    expect(attrs.status).toBe("pending");
+    expect(attrs.operationId).toBe("unknown.op");
+  });
+
+  it("processes full event sequence", () => {
+    const req1: CallEventMapValue = {
+      type: "call.requested",
+      requestId: "req-parent",
+      operationId: "task.parent",
+      input: {},
+      timestamp: "2026-01-01T00:00:00Z",
+    };
+    const req2: CallEventMapValue = {
+      type: "call.requested",
+      requestId: "req-child",
+      operationId: "task.child",
+      input: {},
+      timestamp: "2026-01-01T00:00:01Z",
+      parentRequestId: "req-parent",
+    };
+    const resp: CallEventMapValue = {
+      type: "call.responded",
+      requestId: "req-parent",
+      output: "done",
+      timestamp: "2026-01-01T00:00:02Z",
+    };
+    const graph = FlowGraph.fromCallEvents([req1, req2, resp]);
+    expect(graph.order).toBe(2);
+    expect(graph.hasEdge("req-parent", "req-child")).toBe(true);
+    const parentAttrs = graph.getNodeAttributes("req-parent") as Record<string, unknown>;
+    expect(parentAttrs.status).toBe("completed");
+    const childAttrs = graph.getNodeAttributes("req-child") as Record<string, unknown>;
+    expect(childAttrs.status).toBe("pending");
+  });
+
+  it("stores identity and startedAt from call.requested", () => {
+    const event: CallEventMapValue = {
+      type: "call.requested",
+      requestId: "req-id",
+      operationId: "task.op",
+      input: {},
+      timestamp: "2026-01-01T00:00:00Z",
+      identity: { id: "user-1", scopes: ["read"] },
+      startedAt: "2026-01-01T00:00:01Z",
+    };
+    const graph = FlowGraph.fromCallEvents([event]);
+    const attrs = graph.getNodeAttributes("req-id") as Record<string, unknown>;
+    expect(attrs.identity).toEqual({ id: "user-1", scopes: ["read"] });
+    expect(attrs.startedAt).toBe("2026-01-01T00:00:01Z");
+  });
+
+  it("skips triggered edge if parent node does not exist", () => {
+    const orphanEvent: CallEventMapValue = {
+      type: "call.requested",
+      requestId: "req-orphan",
+      operationId: "task.child",
+      input: {},
+      timestamp: "2026-01-01T00:00:00Z",
+      parentRequestId: "req-nonexistent",
+    };
+    const graph = FlowGraph.fromCallEvents([orphanEvent]);
+    expect(graph.order).toBe(1);
+    expect(graph.hasNode("req-orphan")).toBe(true);
+    expect(graph.size).toBe(0);
+  });
+});
+
+describe("FlowGraph.updateFromEvent", () => {
+  it("processes single event for real-time pattern", () => {
+    const graph = new FlowGraph();
+    graph.updateFromEvent({
+      type: "call.requested",
+      requestId: "req-1",
+      operationId: "task.classify",
+      input: { text: "hello" },
+      timestamp: "2026-01-01T00:00:00Z",
+    });
+    expect(graph.hasNode("req-1")).toBe(true);
+
+    graph.updateFromEvent({
+      type: "call.responded",
+      requestId: "req-1",
+      output: { label: "hi" },
+      timestamp: "2026-01-01T00:00:02Z",
+    });
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("completed");
+    expect(attrs.output).toEqual({ label: "hi" });
+  });
+
+  it("ignores events for unknown requestId", () => {
+    const graph = new FlowGraph();
+    graph.updateFromEvent({
+      type: "call.responded",
+      requestId: "unknown",
+      output: "x",
+      timestamp: "2026-01-01T00:00:00Z",
+    });
+    expect(graph.order).toBe(0);
+  });
+
+  it("ignores terminal event re-processing", () => {
+    const graph = new FlowGraph();
+    graph.updateFromEvent({
+      type: "call.requested",
+      requestId: "req-1",
+      operationId: "task.op",
+      input: {},
+      timestamp: "2026-01-01T00:00:00Z",
+    });
+    graph.updateFromEvent({
+      type: "call.responded",
+      requestId: "req-1",
+      output: "done",
+      timestamp: "2026-01-01T00:00:01Z",
+    });
+    graph.updateFromEvent({
+      type: "call.error",
+      requestId: "req-1",
+      error: { code: "X", message: "Y" },
+      timestamp: "2026-01-01T00:00:02Z",
+    });
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("completed");
+  });
+});
+
+describe("FlowGraph.addCall", () => {
+  it("adds a call node", () => {
+    const graph = new FlowGraph();
+    graph.addCall({
+      requestId: "req-1",
+      operationId: "task.classify",
+      status: "pending",
+      input: { text: "hello" },
+    });
+    expect(graph.hasNode("req-1")).toBe(true);
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("pending");
+  });
+
+  it("adds triggered edge when parentRequestId is present", () => {
+    const graph = new FlowGraph();
+    graph.addCall({
+      requestId: "req-parent",
+      operationId: "task.parent",
+      status: "pending",
+      input: {},
+    });
+    graph.addCall({
+      requestId: "req-child",
+      operationId: "task.child",
+      status: "pending",
+      input: {},
+      parentRequestId: "req-parent",
+    });
+    expect(graph.hasEdge("req-parent", "req-child")).toBe(true);
+    const edgeAttrs = graph.getEdgeAttributes("req-parent", "req-child") as Record<string, unknown>;
+    expect(edgeAttrs.edgeType).toBe("triggered");
+  });
+
+  it("is idempotent — duplicate addCall is ignored", () => {
+    const graph = new FlowGraph();
+    graph.addCall({
+      requestId: "req-1",
+      operationId: "task.op",
+      status: "pending",
+      input: {},
+    });
+    graph.addCall({
+      requestId: "req-1",
+      operationId: "task.op",
+      status: "pending",
+      input: {},
+    });
+    expect(graph.order).toBe(1);
+  });
+
+  it("does not throw if parentRequestId node does not exist", () => {
+    const graph = new FlowGraph();
+    graph.addCall({
+      requestId: "req-child",
+      operationId: "task.child",
+      status: "pending",
+      input: {},
+      parentRequestId: "nonexistent",
+    });
+    expect(graph.hasNode("req-child")).toBe(true);
+    expect(graph.size).toBe(0);
+  });
+});
+
+describe("FlowGraph.addDependency", () => {
+  it("creates depends_on edge", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.a", status: "pending", input: {} });
+    graph.addCall({ requestId: "req-2", operationId: "task.b", status: "pending", input: {} });
+    graph.addDependency("req-1", "req-2");
+    const edgeKey = "req-1->req-2:depends_on";
+    expect(graph.graph.hasEdge(edgeKey)).toBe(true);
+    const attrs = graph.graph.getEdgeAttributes(edgeKey) as Record<string, unknown>;
+    expect(attrs.edgeType).toBe("depends_on");
+  });
+
+  it("is idempotent — duplicate addDependency is ignored", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.a", status: "pending", input: {} });
+    graph.addCall({ requestId: "req-2", operationId: "task.b", status: "pending", input: {} });
+    graph.addDependency("req-1", "req-2");
+    graph.addDependency("req-1", "req-2");
+    expect(graph.graph.hasEdge("req-1->req-2:depends_on")).toBe(true);
+  });
+
+  it("throws NodeNotFoundError if source doesn't exist", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-2", operationId: "task.b", status: "pending", input: {} });
+    expect(() => graph.addDependency("missing", "req-2")).toThrow(NodeNotFoundError);
+  });
+
+  it("throws NodeNotFoundError if target doesn't exist", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.a", status: "pending", input: {} });
+    expect(() => graph.addDependency("req-1", "missing")).toThrow(NodeNotFoundError);
+  });
+
+  it("throws CycleError if adding would create cycle", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.a", status: "pending", input: {} });
+    graph.addCall({ requestId: "req-2", operationId: "task.b", status: "pending", input: {} });
+    graph.addCall({ requestId: "req-3", operationId: "task.c", status: "pending", input: {} });
+    graph.addEdge("req-1", "req-2");
+    graph.addEdge("req-2", "req-3");
+    expect(() => graph.addDependency("req-3", "req-1")).toThrow(CycleError);
+  });
+});
+
+describe("FlowGraph.updateStatus", () => {
+  it("transitions pending to running", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("running");
+  });
+
+  it("transitions running to completed", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    graph.updateStatus("req-1", "completed", { completedAt: "2026-01-01T00:00:01Z" });
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("completed");
+    expect(attrs.completedAt).toBe("2026-01-01T00:00:01Z");
+  });
+
+  it("transitions running to failed", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    graph.updateStatus("req-1", "failed");
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("failed");
+  });
+
+  it("transitions pending to aborted", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "aborted");
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("aborted");
+  });
+
+  it("transitions running to aborted", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    graph.updateStatus("req-1", "aborted");
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("aborted");
+  });
+
+  it("is no-op if status is already the target", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "pending");
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("pending");
+  });
+
+  it("throws InvalidTransitionError for completed to running", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    graph.updateStatus("req-1", "completed", { completedAt: "2026-01-01T00:00:01Z" });
+    expect(() => graph.updateStatus("req-1", "running")).toThrow(InvalidTransitionError);
+  });
+
+  it("throws InvalidTransitionError for failed to running", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    graph.updateStatus("req-1", "failed");
+    expect(() => graph.updateStatus("req-1", "running")).toThrow(InvalidTransitionError);
+  });
+
+  it("throws InvalidTransitionError for aborted to running", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "aborted");
+    expect(() => graph.updateStatus("req-1", "running")).toThrow(InvalidTransitionError);
+  });
+
+  it("throws InvalidTransitionError for pending to completed", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    expect(() => graph.updateStatus("req-1", "completed")).toThrow(InvalidTransitionError);
+  });
+
+  it("throws InvalidTransitionError for pending to failed", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    expect(() => graph.updateStatus("req-1", "failed")).toThrow(InvalidTransitionError);
+  });
+
+  it("throws NodeNotFoundError for unknown requestId", () => {
+    const graph = new FlowGraph();
+    expect(() => graph.updateStatus("missing", "running")).toThrow(NodeNotFoundError);
+  });
+
+  it("InvalidTransitionError contains from/to info", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    graph.updateStatus("req-1", "completed", { completedAt: "2026-01-01T00:00:01Z" });
+    try {
+      graph.updateStatus("req-1", "running");
+      expect.unreachable("should throw");
+    } catch (e) {
+      expect(e).toBeInstanceOf(InvalidTransitionError);
+      const ite = e as InvalidTransitionError;
+      expect(ite.requestId).toBe("req-1");
+      expect(ite.from).toBe("completed" as CallStatus);
+      expect(ite.to).toBe("running" as CallStatus);
+    }
+  });
+
+  it("merges extra attributes on transition", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.op", status: "pending", input: {} });
+    graph.updateStatus("req-1", "running");
+    graph.updateStatus("req-1", "completed", {
+      output: { result: 42 },
+      completedAt: "2026-01-01T00:00:01Z",
+    });
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.status).toBe("completed");
+    expect(attrs.output).toEqual({ result: 42 });
+    expect(attrs.completedAt).toBe("2026-01-01T00:00:01Z");
+  });
+});
+
+describe("FlowGraph.updateCall", () => {
+  it("partially merges call attributes", () => {
+    const graph = new FlowGraph();
+    graph.addCall({
+      requestId: "req-1",
+      operationId: "task.op",
+      status: "pending",
+      input: {},
+    });
+    graph.updateCall("req-1", { output: "some result" });
+    const attrs = graph.getNodeAttributes("req-1") as Record<string, unknown>;
+    expect(attrs.output).toBe("some result");
+    expect(attrs.status).toBe("pending");
+  });
+
+  it("throws NodeNotFoundError for unknown requestId", () => {
+    const graph = new FlowGraph();
+    expect(() => graph.updateCall("missing", { output: "x" })).toThrow(NodeNotFoundError);
+  });
+});
+
+describe("FlowGraph.removeCall", () => {
+  it("removes node and attached edges", () => {
+    const graph = new FlowGraph();
+    graph.addCall({ requestId: "req-1", operationId: "task.parent", status: "pending", input: {} });
+    graph.addCall({ requestId: "req-2", operationId: "task.child", status: "pending", input: {}, parentRequestId: "req-1" });
+    expect(graph.size).toBe(1);
+    graph.removeCall("req-2");
+    expect(graph.hasNode("req-2")).toBe(false);
+    expect(graph.size).toBe(0);
+    expect(graph.hasNode("req-1")).toBe(true);
+  });
+
+  it("is a no-op if requestId doesn't exist", () => {
+    const graph = new FlowGraph();
+    expect(() => graph.removeCall("missing")).not.toThrow();
+  });
 });