Keycloak Assign a User to a Group

arazzo: 1.0.1
info:
  title: Keycloak Assign a User to a Group
  summary: Resolve a user and a group by name, add the membership, and verify it landed.
  description: >-
    Group membership is how access is granted at scale in Keycloak, but the
    membership endpoint speaks only UUIDs while operators and upstream systems
    speak usernames and group names. This workflow closes that gap: it resolves
    both identifiers, adds the membership, and reads the user's groups back to
    prove the assignment took. The add is a PUT and therefore idempotent, so
    re-running the flow on an existing membership is safe rather than an error.
    Every step spells out its request inline so the flow can be read and executed
    without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: keycloakAdminApi
  url: ../openapi/keycloak-admin-rest-api-openapi.yml
  type: openapi
workflows:
- workflowId: assign-user-to-group
  summary: Add a user to a group by username and group name, then verify the membership.
  description: >-
    Resolves a username to a user UUID and a group name to a group UUID, adds the
    user to the group, and reads back the user's group list to confirm.
  inputs:
    type: object
    required:
    - realm
    - username
    - groupName
    properties:
      realm:
        type: string
        description: The name of the realm the user and group live in.
      username:
        type: string
        description: The username of the account to add to the group.
      groupName:
        type: string
        description: The name of the top-level group to add the user to.
  steps:
  - stepId: resolveUser
    description: >-
      Resolve the account UUID from the username. The membership endpoint accepts
      only UUIDs, so this lookup is mandatory rather than convenience.
    operationId: getUsers
    parameters:
    - name: realm
      in: path
      value: $inputs.realm
    - name: username
      in: query
      value: $inputs.username
    - name: max
      in: query
      value: 1
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.length > 0
      type: jsonpath
    outputs:
      userId: $response.body#/0/id
      resolvedUsername: $response.body#/0/username
  - stepId: resolveGroup
    description: >-
      Resolve the group UUID by searching top-level groups by name. Note this
      searches root groups; a nested subgroup has to be addressed by the id from
      its parent's subGroups tree instead.
    operationId: getGroups
    parameters:
    - name: realm
      in: path
      value: $inputs.realm
    - name: search
      in: query
      value: $inputs.groupName
    - name: max
      in: query
      value: 1
    - name: briefRepresentation
      in: query
      value: false
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.length > 0
      type: jsonpath
    outputs:
      groupId: $response.body#/0/id
      groupPath: $response.body#/0/path
      groupRealmRoles: $response.body#/0/realmRoles
  - stepId: addMembership
    description: >-
      Add the user to the group. This is a PUT, so applying it to a user who is
      already a member succeeds quietly rather than conflicting.
    operationId: addUserToGroup
    parameters:
    - name: realm
      in: path
      value: $inputs.realm
    - name: userId
      in: path
      value: $steps.resolveUser.outputs.userId
    - name: groupId
      in: path
      value: $steps.resolveGroup.outputs.groupId
    successCriteria:
    - condition: $statusCode == 204
  - stepId: verifyMembership
    description: >-
      Read the user's group list back to prove the membership landed, and to show
      the caller every other group the account now inherits access from.
    operationId: getUserGroups
    parameters:
    - name: realm
      in: path
      value: $inputs.realm
    - name: userId
      in: path
      value: $steps.resolveUser.outputs.userId
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.length > 0
      type: jsonpath
    outputs:
      groups: $response.body
  outputs:
    userId: $steps.resolveUser.outputs.userId
    username: $steps.resolveUser.outputs.resolvedUsername
    groupId: $steps.resolveGroup.outputs.groupId
    groupPath: $steps.resolveGroup.outputs.groupPath
    groups: $steps.verifyMembership.outputs.groups