SendGrid Send Transactional Mail

arazzo: 1.0.1
info:
  title: SendGrid Send Transactional Mail
  summary: Send a single transactional email and branch on whether it was accepted.
  description: >-
    The simplest and most common SendGrid flow. The workflow sends one
    transactional message through the Mail Send endpoint with an inline subject
    and HTML content body, and branches on the response: SendGrid accepts a
    valid send asynchronously and returns a 202, which ends the flow
    successfully. The request and bearer token are inlined so the message can be
    read and replayed without the OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: mailSendApi
  url: ../openapi/sendgrid-mail-send-api-openapi.yml
  type: openapi
workflows:
- workflowId: send-transactional-mail
  summary: Send one transactional email and confirm it was accepted.
  description: >-
    Sends a single message with subject and HTML content and branches on the
    202 acceptance status.
  inputs:
    type: object
    required:
    - apiKey
    - fromEmail
    - toEmail
    - subject
    - htmlContent
    properties:
      apiKey:
        type: string
        description: SendGrid API key sent as a bearer token.
      fromEmail:
        type: string
        description: The verified sender email address messages are sent from.
      toEmail:
        type: string
        description: The recipient email address.
      subject:
        type: string
        description: The subject line of the email.
      htmlContent:
        type: string
        description: The HTML body content of the email.
  steps:
  - stepId: sendMail
    description: >-
      Send the message. SendGrid accepts a valid send asynchronously and
      returns a 202 status, which ends the flow.
    operationId: SendMail
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.apiKey"
    requestBody:
      contentType: application/json
      payload:
        from:
          email: $inputs.fromEmail
        personalizations:
        - to:
          - email: $inputs.toEmail
        subject: $inputs.subject
        content:
        - type: text/html
          value: $inputs.htmlContent
    successCriteria:
    - condition: $statusCode == 202
    outputs:
      statusCode: $statusCode
    onSuccess:
    - name: accepted
      type: end
      criteria:
      - condition: $statusCode == 202
  outputs:
    sendStatus: $steps.sendMail.outputs.statusCode