add aiohttp doc generation support

hapic/ext/aiohttp/context.py

 # coding: utf-8
-import asyncio
 import json
+import re
 import typing
 from http import HTTPStatus
-from json import JSONDecodeError
 
 from aiohttp.web_request import Request
 from aiohttp.web_response import Response
 from hapic.context import BaseContext
 from hapic.context import RouteRepresentation
 from hapic.decorator import DecoratedController
-from hapic.error import ErrorBuilderInterface, DefaultErrorBuilder
-from hapic.exception import WorkflowException, OutputValidationException
+from hapic.decorator import DECORATION_ATTRIBUTE_NAME
+from hapic.error import ErrorBuilderInterface
+from hapic.error import DefaultErrorBuilder
+from hapic.exception import WorkflowException
+from hapic.exception import OutputValidationException
+from hapic.exception import NoRoutesException
+from hapic.exception import RouteNotFound
 from hapic.processor import ProcessValidationError
 from hapic.processor import RequestParameters
 from aiohttp import web
 
 
+# Bottle regular expression to locate url parameters
+AIOHTTP_RE_PATH_URL = re.compile(r'{([^:<>]+)(?::[^<>]+)?}')
+
+
 class AiohttpRequestParameters(object):
     def __init__(
         self,
         self,
         decorated_controller: DecoratedController,
     ) -> RouteRepresentation:
-        # TODO BS 2018-07-15: to do
-        raise NotImplementedError('todo')
+        if not len(self.app.router.routes()):
+            raise NoRoutesException('There is no routes in your aiohttp app')
+
+        reference = decorated_controller.reference
+
+        for route in self.app.router.routes():
+            route_token = getattr(
+                route.handler,
+                DECORATION_ATTRIBUTE_NAME,
+                None,
+            )
+
+            match_with_wrapper = route.handler == reference.wrapper
+            match_with_wrapped = route.handler == reference.wrapped
+            match_with_token = route_token == reference.token
+
+            # TODO BS 2018-07-27: token is set in HEAD view to, must solve this
+            # case
+            if not match_with_wrapper \
+                    and not match_with_wrapped \
+                    and match_with_token \
+                    and route.method.lower() == 'head':
+                continue
+
+            if match_with_wrapper or match_with_wrapped or match_with_token:
+                return RouteRepresentation(
+                    rule=self.get_swagger_path(route.resource.canonical),
+                    method=route.method.lower(),
+                    original_route_object=route,
+                )
+        # TODO BS 20171010: Raise exception or print error ? see #10
+        raise RouteNotFound(
+            'Decorated route "{}" was not found in aiohttp routes'.format(
+                decorated_controller.name,
+            )
+        )
 
     def get_swagger_path(
         self,
         contextualised_rule: str,
     ) -> str:
-        # TODO BS 2018-07-15: to do
-        raise NotImplementedError('todo')
+        return AIOHTTP_RE_PATH_URL.sub(r'{\1}', contextualised_rule)
 
     def by_pass_output_wrapping(
         self,

tests/ext/unit/test_aiohttp.py

         assert b'{"name": "Hello, franck"}\n' == line
 
         # TODO BS 2018-07-26: How to ensure we are at end of response ?
+
+    def test_unit__generate_doc__ok__nominal_case(
+        self,
+        aiohttp_client,
+        loop,
+    ):
+        hapic = Hapic(async_=True)
+
+        class InputPathSchema(marshmallow.Schema):
+            username = marshmallow.fields.String(required=True)
+
+        class InputQuerySchema(marshmallow.Schema):
+            show_deleted = marshmallow.fields.Boolean(required=False)
+
+        class UserSchema(marshmallow.Schema):
+            name = marshmallow.fields.String(required=True)
+
+        @hapic.with_api_doc()
+        @hapic.input_path(InputPathSchema())
+        @hapic.input_query(InputQuerySchema())
+        @hapic.output_body(UserSchema())
+        async def get_user(request, hapic_data):
+            pass
+
+        @hapic.with_api_doc()
+        @hapic.input_path(InputPathSchema())
+        @hapic.output_body(UserSchema())
+        async def post_user(request, hapic_data):
+            pass
+
+        app = web.Application(debug=True)
+        app.router.add_get('/{username}', get_user)
+        app.router.add_post('/{username}', post_user)
+        hapic.set_context(AiohttpContext(app))
+
+        doc = hapic.generate_doc('aiohttp', 'testing')
+        assert 'UserSchema' in doc.get('definitions')
+        assert {
+                   'name': {'type': 'string'}
+               } == doc['definitions']['UserSchema'].get('properties')
+        assert '/{username}' in doc.get('paths')
+        assert 'get' in doc['paths']['/{username}']
+        assert 'post' in doc['paths']['/{username}']
+
+        assert [
+            {
+                'name': 'username',
+                'in': 'path',
+                'required': True,
+                'type': 'string',
+            },
+            {
+                'name': 'show_deleted',
+                'in': 'query',
+                'required': False,
+                'type': 'boolean',
+            }
+        ] == doc['paths']['/{username}']['get']['parameters']
+        assert {
+            200: {
+                'schema': {
+                    '$ref': '#/definitions/UserSchema',
+                },
+                'description': '200',
+            }
+        } == doc['paths']['/{username}']['get']['responses']
+
+        assert [
+                   {
+                       'name': 'username',
+                       'in': 'path',
+                       'required': True,
+                       'type': 'string',
+                   }
+               ] == doc['paths']['/{username}']['post']['parameters']
+        assert {
+                   200: {
+                       'schema': {
+                           '$ref': '#/definitions/UserSchema',
+                       },
+                       'description': '200',
+                   }
+               } == doc['paths']['/{username}']['get']['responses']