openapi: 3.0.3
info:
  title: Global System for Mobile Communications GSMA Camara Project Endpoint Discovery Application Call Forwarding Information Retrieval API
  version: 0.1.0-wip
  description: The Application Discovery API extends beyond the capabilities of the Simple Edge Discovery API by not only locating the nearest Edge Cloud Zone but also directly linking to the application endpoints within those Edge Cloud Zones.
  contact:
    email: sp-edc@lists.camaraproject.org
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.html
servers:
- url: '{apiRoot}/{basePath}'
  variables:
    apiRoot:
      default: https://localhost:443
      description: API root.
    basePath:
      default: application-endpoint-discovery/vwip
      description: Base path for the Application Endpoint Discovery.
tags:
- name: Call Forwarding Information Retrieval
  description: Provides information on Call Forwarding settings for the provided phone number (PhoneNumber).
paths:
  /call-forwardings:
    post:
      tags:
      - Call Forwarding Information Retrieval
      security:
      - openId:
        - call-forwarding-signal:call-forwardings:read
      summary: Global System for Mobile Communications Retrieve the information about the type of call forwarding service active on a phone number (PhoneNumber)
      description: This endpoint provides information about wich type of call forwarding service is active. More than one service can be active, e.g. conditional and unconditional. This endpoint exceeds the main scope of the CFS API, for this reason an error code 501 can be returned.
      operationId: retrieveCallForwarding
      parameters:
      - $ref: '#/components/parameters/x-correlator'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateCallForwardingSignal'
        required: true
      responses:
        '200':
          description: OK.
          headers:
            x-correlator:
              $ref: '#/components/headers/x-correlator'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CallForwardingSignal'
        '400':
          $ref: '#/components/responses/Generic400'
        '401':
          $ref: '#/components/responses/Generic401'
        '403':
          $ref: '#/components/responses/Generic403'
        '404':
          $ref: '#/components/responses/Generic404'
        '409':
          $ref: '#/components/responses/Generic409'
        '415':
          $ref: '#/components/responses/Generic415'
        '422':
          $ref: '#/components/responses/Generic422'
        '429':
          $ref: '#/components/responses/Generic429'
        '500':
          $ref: '#/components/responses/Generic500'
        '501':
          $ref: '#/components/responses/Generic501'
        '503':
          $ref: '#/components/responses/Generic503'
        '504':
          $ref: '#/components/responses/Generic504'
components:
  responses:
    Generic503:
      description: Service unavailable. Typically the server is down
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          example:
            status: 503
            code: UNAVAILABLE
            message: Service unavailable
    Generic422:
      description: Unprocessable Content
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          examples:
            GENERIC_422_DEVICE_IDENTIFIERS_MISMATCH:
              description: Inconsistency between device identifiers not pointing to the same device
              value:
                status: 422
                code: DEVICE_IDENTIFIERS_MISMATCH
                message: Provided device identifiers are not consistent.
            GENERIC_422_DEVICE_NOT_APPLICABLE:
              description: Service is not available for the provided device
              value:
                status: 422
                code: DEVICE_NOT_APPLICABLE
                message: The service is not available for the provided device.
            GENERIC_422_UNIDENTIFIABLE_DEVICE:
              description: phone number not available neither from "phoneNumber" or from the access token.
              value:
                status: 422
                code: UNIDENTIFIABLE_DEVICE
                message: phone number not defined
    Generic415:
      description: Unsupported Media Type
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          examples:
            GENERIC_415_UNSUPPORTED_MEDIA_TYPE:
              description: Payload format of the request is in an unsupported format by the Server.
              value:
                status: 415
                code: UNSUPPORTED_MEDIA_TYPE
                message: The server refuses to accept the request because the payload format is in an unsupported format.
    Generic409:
      description: Conflict
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          examples:
            GENERIC_409_ABORTED:
              description: Concurrency of processes of the same nature/scope
              value:
                status: 409
                code: ABORTED
                message: Concurrency conflict.
            GENERIC_409_ALREADY_EXISTS:
              description: Trying to create an existing resource
              value:
                status: 409
                code: ALREADY_EXISTS
                message: The resource that a client tried to create already exists.
            GENERIC_409_CONFLICT:
              description: Duplication of an existing resource
              value:
                status: 409
                code: CONFLICT
                message: A specified resource duplicate entry found.
    Generic500:
      description: Server error
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          example:
            status: 500
            code: INTERNAL
            message: Server error
    Generic401:
      description: Authentication problem with the client request
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          example:
            status: 401
            code: UNAUTHENTICATED
            message: Request not authenticated due to missing, invalid, or expired credentials
    Generic403:
      description: Client does not have sufficient permission
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          examples:
            PermissionDenied:
              value:
                status: 403
                code: PERMISSION_DENIED
                message: Client does not have sufficient permissions to perform this action
            InvalidTokenContext:
              value:
                status: 403
                code: INVALID_TOKEN_CONTEXT
                message: PhoneNumber parameter doesn't match the value from the access token context
    Generic429:
      description: Too Many Requests
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          examples:
            GENERIC_429_QUOTA_EXCEEDED:
              description: Request is rejected due to exceeding a business quota limit.
              value:
                status: 429
                code: QUOTA_EXCEEDED
                message: Either out of resource quota or reaching rate limiting.
            GENERIC_429_TOO_MANY_REQUESTS:
              description: API Server request limit is overpassed
              value:
                status: 429
                code: TOO_MANY_REQUESTS
                message: Either out of resource quota or reaching rate limiting.
    Generic400:
      description: Problem with the client request
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          example:
            status: 400
            code: INVALID_ARGUMENT
            message: Client specified an invalid argument, request body or query param
    Generic504:
      description: Request time exceeded. If it happens repeatedly, consider reducing the request complexity
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          example:
            status: 504
            code: TIMEOUT
            message: Request timeout exceeded. Try later
    Generic501:
      description: Not Implemented
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          examples:
            GENERIC_501_NOT_IMPLEMENTED:
              description: Service not implemented. The use of this code should be avoided as far as possible to get the objective to reach aligned implementations
              value:
                status: 501
                code: NOT_IMPLEMENTED
                message: This functionality is not implemented yet.
    Generic404:
      description: The specified resource was not found
      headers:
        x-correlator:
          $ref: '#/components/headers/x-correlator'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorInfo'
          example:
            status: 404
            code: CALL_FORWARDING.UNKNOWN_PHONE_NUMBER
            message: Call forwarding check can't be done because the phone number is unknown
  schemas:
    CallForwardingSignal:
      description: resource containing the list of the Call Forwarding Services active for the given phone number (PhoneNumber). The possible states are, 'inactive' (no call forwarding service activated), 'unconditional' (call forwarded independently from the device status), 'conditional_busy' (call forwarded if the device is on an active call), 'conditional_unavailable' (call forwarded if the device is not available on the network), 'conditional_no_reply' (call forwarded if the device doesn't answer the incoming call).
      type: array
      items:
        type: string
        enum:
        - inactive
        - unconditional
        - conditional_busy
        - conditional_unavailable
        - conditional_no_reply
      example:
      - unconditional
      - conditional_busy
      - conditional_no_reply
      minItems: 1
    CreateCallForwardingSignal:
      description: resource containing the phone number (PhoneNumber) regarding which the Call Forwarding Service must be checked
      type: object
      properties:
        phoneNumber:
          $ref: '#/components/schemas/PhoneNumber'
    ErrorInfo:
      description: error information
      type: object
      required:
      - status
      - code
      - message
      properties:
        status:
          type: integer
          description: HTTP status code returned along with this error response
        code:
          type: string
          description: Code given to this error
        message:
          type: string
          description: Detailed error description
    PhoneNumber:
      description: A public identifier addressing a telephone subscription. In mobile networks it corresponds to the MSISDN (Mobile Station International Subscriber Directory Number). In order to be globally unique it has to be formatted in international format, according to E.164 standard, prefixed with '+'.
      type: string
      pattern: ^\+[1-9][0-9]{4,14}$
      example: '+123456789'
  headers:
    x-correlator:
      description: Correlation id for the different services
      schema:
        type: string
  parameters:
    x-correlator:
      name: x-correlator
      in: header
      description: Correlation id for the different services
      schema:
        type: string
  securitySchemes:
    openId:
      description: OpenID Provider Configuration Information.
      type: openIdConnect
      openIdConnectUrl: .well-known/openid-configuration
externalDocs:
  description: Product documentation at CAMARA.
  url: https://github.com/camaraproject/EdgeCloud