parameters:
  - name: id
    in: path
    required: true
    description: Invoice primary key.
    schema:
      type: string
      format: uuid
    example: 88888888-8888-4888-8888-888888888888
get:
  tags: [Approvals]
  summary: List invoice comments
  description: Returns comments on one invoice.
  operationId: get-api-invoices-id-comments
  responses:
    "200":
      description: Comment list.
      content:
        application/json:
          schema:
            type: object
            required: [items]
            properties:
              items:
                type: array
                items:
                  $ref: ../components/schemas.yaml#/InvoiceComment
    "400":
      description: Invalid id.
      content:
        application/json:
          schema:
            $ref: ../components/schemas.yaml#/Error
    "401":
      description: Missing session.
      content:
        application/json:
          schema:
            $ref: ../components/schemas.yaml#/Error
    "404":
      description: Invoice not found.
      content:
        application/json:
          schema:
            $ref: ../components/schemas.yaml#/Error
post:
  tags: [Approvals]
  summary: Add an invoice comment
  description: Appends a comment and an activity row.
  operationId: post-api-invoices-id-comments
  requestBody:
    required: true
    content:
      application/json:
        schema:
          type: object
          required: [body]
          properties:
            body:
              type: string
              example: Looks good.
  responses:
    "201":
      description: Created comment.
      content:
        application/json:
          schema:
            $ref: ../components/schemas.yaml#/InvoiceComment
    "400":
      description: Validation failed.
      content:
        application/json:
          schema:
            $ref: ../components/schemas.yaml#/Error
    "404":
      description: Invoice not found.
      content:
        application/json:
          schema:
            $ref: ../components/schemas.yaml#/Error