Part

export type Part =
  | TextPart
  | SubtaskPart
  | ReasoningPart
  | FilePart
  | ToolPart
  | StepStartPart
  | StepFinishPart
  | SnapshotPart
  | PatchPart
  | AgentPart
  | RetryPart
  | CompactionPart

;["part", messageID, partID]

// 初始创建
const textPart: MessageV2.TextPart = {
  id: Identifier.ascending("part"),
  sessionID: session.id,
  messageID: message.id,
  type: "text",
  text: "",
  time: { start: Date.now() },
}

await Session.updatePart(textPart)

// 流式追加
await Session.updatePart({
  part: { ...textPart, text: "Hello " },
  delta: "Hello ",
})

await Session.updatePart({
  part: { ...textPart, text: "Hello World" },
  delta: "World",
})

const filePart: MessageV2.FilePart = {
  id: Identifier.ascending("part"),
  sessionID: session.id,
  messageID: message.id,
  type: "file",
  mime: "image/png",
  filename: "screenshot.png",
  url: "https://cdn.example.com/screenshot.png",
  source: {
    type: "file",
    path: "/path/to/screenshot.png",
    text: {
      value: "![screenshot](https://cdn.example.com/screenshot.png)",
      start: 0,
      end: 100,
    },
  },
}

await Session.updatePart(filePart)

// 1. 创建 Pending 状态
const toolPart: MessageV2.ToolPart = {
  id: Identifier.ascending("part"),
  sessionID: session.id,
  messageID: message.id,
  type: "tool",
  callID: Identifier.ascending("tool"),
  tool: "bash",
  state: {
    status: "pending",
    input: { command: "npm test" },
    raw: '{"command": "npm test"}',
  },
}
await Session.updatePart(toolPart)

// 2. 更新为 Running 状态
toolPart.state = {
  status: "running",
  input: toolPart.state.input,
  title: "Running npm test",
  metadata: {},
  time: { start: Date.now() },
}
await Session.updatePart(toolPart)

// 3. 更新为 Completed 状态
toolPart.state = {
  status: "completed",
  input: toolPart.state.input,
  output: "✓ All tests passed",
  title: "npm test",
  metadata: {},
  time: {
    start: toolPart.state.time.start,
    end: Date.now(),
  },
  attachments: [],
}
await Session.updatePart(toolPart)

const parts = await MessageV2.parts(messageID)

for (const part of parts) {
  switch (part.type) {
    case "text":
      console.log(`Text: ${part.text}`)
      break
    case "tool":
      console.log(`Tool: ${part.tool} (${part.state.status})`)
      break
    case "file":
      console.log(`File: ${part.filename}`)
      break
  }
}

await Session.removePart({
  sessionID: session.id,
  messageID: message.id,
  partID: part.id,
})