| 1 | import { type UIMessage } from "ai"; |
| 2 | |
| 3 | export type UIToolPart = Extract< |
| 4 | UIMessage["parts"][number], |
| 5 | { type: "dynamic-tool" | `tool-${string}` } |
| 6 | >; |
| 7 | |
| 8 | export function getMessageText(message: UIMessage) { |
| 9 | return message.parts |
| 10 | .filter((part): part is Extract<typeof part, { type: "text" }> => { |
| 11 | return part.type === "text"; |
| 12 | }) |
| 13 | .map((part) => part.text) |
| 14 | .join(""); |
| 15 | } |
| 16 | |
| 17 | export function getLatestUserMessage(messages: UIMessage[]) { |
| 18 | return [...messages].reverse().find((message) => message.role === "user"); |
| 19 | } |
| 20 | |
| 21 | export function isToolPart(part: UIMessage["parts"][number]): part is UIToolPart { |
| 22 | return part.type === "dynamic-tool" || part.type.startsWith("tool-"); |
| 23 | } |
| 24 | |
| 25 | export function getToolName(part: UIToolPart) { |
| 26 | return part.type === "dynamic-tool" ? part.toolName : part.type.slice(5); |
| 27 | } |
| 28 | |
| 29 | export function getToolState(part: UIToolPart): "call" | "partial-call" | "result" { |
| 30 | if (part.state === "output-available") return "result"; |
| 31 | if (part.state === "input-streaming") return "partial-call"; |
| 32 | return "call"; |
| 33 | } |
| 34 | |
| 35 | export function getToolInputArgs(part: UIToolPart): Record<string, unknown> { |
| 36 | if ("input" in part && typeof part.input === "object" && part.input !== null) { |
| 37 | return part.input as Record<string, unknown>; |
| 38 | } |
| 39 | |
| 40 | return {}; |
| 41 | } |
| 42 | |
| 43 | export function getToolOutput(part: UIToolPart) { |
| 44 | return "output" in part ? part.output : undefined; |
| 45 | } |
| 46 |