Function buildFunctionNodeDef

ts/workflow-core/src/node/FunctionNode.ts:43–79

(
  fn: FunctionInfo,
  t: (key: string, params?: Record<string, unknown>) => string = (key) => key,
)

 * translator is supplied; validation logic ignores description strings.
 */
export function buildFunctionNodeDef(
  fn: FunctionInfo,
  t: (key: string, params?: Record<string, unknown>) => string = (key) => key,
): FunctionNodeDefinition {
  return {
    type: "FunctionCall",
    functionInfo: fn,
    label: fn.name,
    category: NodeCategory.Function,
    description: t("builder.functionCallDesc", { name: fn.name }),
    parameters: [
      ...fn.arguments.map((param) => ({
        id: paramKey(param),
        label: param.name,
        description: t("builder.functionParamDesc", { name: param.name }),
        type: "expression" as const,
        expressionType: param.dataType as DataType,
        default: { expression: "", references: [], dataType: param.dataType as DataType },
        activationRules: [{ type: "isControlFlow" as const }],
      })),
      {
        id: "toolDescription",
        label: "Tool Description",
        description: "Description shown to the agent when this function is wired as a tool",
        type: "string" as const,
        multiline: true,
        activationRules: [{ type: "isToolInput" as const }],
      },
    ],
    outputs: fn.returns.map((ret) => ({
      id: paramKey(ret),
      label: ret.name,
      type: "static" as const,
      dataType: ret.dataType as DataType,
    })),
  };
}