type: object
properties:
  id:
    type: integer
    description: The ID of the message
  content:
    type:
      - string
      - 'null'
    description: The content of the message
  content_type:
    type: string
    description: The type of the message content
  content_attributes:
    type:
      - object
      - 'null'
    description: Additional attributes for the message content
  internal_chat_channel_id:
    type: integer
    description: The ID of the channel this message belongs to
  sender:
    type:
      - object
      - 'null'
    description: The sender of the message
  parent_id:
    type:
      - integer
      - 'null'
    description: The ID of the parent message (for threaded replies)
  echo_id:
    type:
      - string
      - 'null'
    description: Client-generated ID for optimistic updates
  replies_count:
    type: integer
    description: The number of replies to this message
  created_at:
    type: string
    format: date-time
    description: The time at which the message was created
  updated_at:
    type: string
    format: date-time
    description: The time at which the message was last updated
  reactions:
    type: array
    description: Array of reactions on this message
    items:
      $ref: ./reaction.yml
  attachments:
    type: array
    description: Array of file attachments on this message
    items:
      type: object
      properties:
        id:
          type: integer
          description: The ID of the attachment
        file_type:
          type: string
          enum:
            - image
            - audio
            - video
            - file
          description: The type of the attached file
        external_url:
          type:
            - string
            - 'null'
          description: External URL for the attachment
        extension:
          type:
            - string
            - 'null'
          description: File extension of the attachment
        file_url:
          type:
            - string
            - 'null'
          description: URL to download the attached file
  poll:
    type:
      - object
      - 'null'
    description: Poll data, present when the message carries a poll
    $ref: ./poll.yml