Method messageToOutput

packages/runtime-core/src/kernel-client.ts:195–238

* Convert a Jupyter message to an IOutput object.

(msg: { header: { msg_type: string }; content: unknown })

   * Convert a Jupyter message to an IOutput object.
   */
  private messageToOutput(msg: { header: { msg_type: string }; content: unknown }): IOutput {
    const msgType = msg.header.msg_type
    const content = msg.content as Record<string, unknown>

    switch (msgType) {
      case 'stream':
        return {
          output_type: 'stream',
          name: content.name as 'stdout' | 'stderr',
          text: content.text as string,
        }

      case 'execute_result':
        return {
          output_type: 'execute_result',
          data: content.data as IExecuteResult['data'],
          metadata: (content.metadata ?? {}) as IExecuteResult['metadata'],
          execution_count: content.execution_count as number,
        }

      case 'display_data':
        return {
          output_type: 'display_data',
          data: content.data as IDisplayData['data'],
          metadata: (content.metadata ?? {}) as IDisplayData['metadata'],
        }

      case 'error':
        return {
          output_type: 'error',
          ename: content.ename as string,
          evalue: content.evalue as string,
          traceback: content.traceback as string[],
        }

      default:
        return {
          output_type: 'error',
          ename: 'UnknownMsgType',
          evalue: `Received unknown message type: ${msgType}`,
          traceback: [],
        }
    }
  }
}