High-level integration

[p1c2u]

Proposal:

OpenAPI class:

openapi = OpenAPI.from_file(
    'openapi.yaml',
    integration=flask.FlaskIntegration(
        xxx="test",
    ),
)

Interface:

openapi.validate_request(flask_request)

openapi.validate_response(flask_response)

@openapi.validate
def test_view(request):
   pass

result = openapi.unmarshal_request(request)

result = openapi.unmarshal_response(response)

@openapi.unmarshal
def test_view(request, result):
    pass