OpenAPI to/from Flow Schema

[norberttech]

One of the things that will help to consume/expose Http-based datasets would be to be able to infer/generate OpenAPI specification for a given dataset.

Here is an example scenario, let's say we want to expose a dataset through the API (instead of granting read-only access to our filesystem/db).

Let say this is our schema:

$schema = schema(
    int_schema('id', $nullable = false),
    str_schema('name', $nullable = true),
    bool_schema('active', $nullable = false, Metadata::empty()->add('key', 'value')),
);

Lets build a OpenAPI specification for that endpoint:

openapi: 3.0.0
info:
  title: User API
  version: 1.0.0
paths:
  /users:
    get:
      summary: Get list of users
      responses:
        '200':
          description: A list of users
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  properties:
                    id:
                      type: integer
                      nullable: false
                      example: 1
                    name:
                      type: string
                      nullable: true
                      example: "John Doe"
                    active:
                      type: boolean
                      nullable: false
                      example: true
components:
  schemas:
    User:
      type: object
      properties:
        id:
          type: integer
          nullable: false
        name:
          type: string
          nullable: true
        active:
          type: boolean
          nullable: false

If we take a closer look properties are 1:1 translatable to/from Flow Schema.

We can add it as a new Bridge src/bridge/openapi/flow/ that would provide two converters:

• Flow to OpenAPI
• OpenAPI to Flow

[norberttech]

It would be nice to find a way to integrate it also with the API Platform (but through a separate bridge).

Ideally, the openapi schema converter would be put under a flow-php/openapi-bridge and maybe we could create an independent one flow-php/api-platform bridge.