A client can identify a person and retrieve their flows

[tomtitherington]

Background & Context*

Once a client has a valid Websocket connection to the server, they should be able to retrieve details of a person and the state of their flows.

Goal*

• A client should be able to specify that they want to identify the specified person using the person key/email.
• A client should be able to provide person data that will update and override the Person.data field with the JSON data provided (if it is valid).

Implementation Details*

Calls to this endpoint should be idempotent. Calling this endpoint multiple times with the same parameters should always result in the same outcome.

// Example request
{
    "action": "identify",
    "request_id" : Date.now(),
    "data": {
        "person_key": "string",
        "properties": "object"
    }
}

// Example response from "identify" action
{
  "request_id": 1519211809934,
  "errors": [],
  "status": 200,
  "data": {
    "person_id": "string",
    "flows": [
      {
        "flow_instance_id": "string",
        "flow_schema_identifier": "string",
        "state": "string (active, inactive, completed, exited)"
      }
    ]
  }
}

Acceptance Criteria*

Test cases that

• Assert that given a valid Person.id the server will respond with a 200 / status OK.
• Assert that given a valid Person.id the server will provide a JSON response in the format and structure defined above.
• Assert that an invalid Person.id will indicate that the Person.id was invalid or general 404.
• Assert that JSON data that does not adhere to the structure defined in Person.schema will return an invalid error and unsuccessful response.

Dependencies

Blockers:

• Setup flow engine #22
• Setup Websocket consumers #62

Additional Details

Subscribing to flow / step state changes are not covered by this issue. A client will need to send another request type to subscribe to these changes.

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