router.py

from importlib import import_module


NEW = 'new'
EDIT = 'edit'
LIST = 'list'
DELETE = 'delete'
DEFAULT_ACTIONS = [NEW, EDIT, LIST, DELETE]


class Resource:
    def __init__(self, resource_name, actions, views_module):
        self.resource_name = resource_name
        self.actions = actions
        self.views_module = views_module

    @property
    def paths(self):
        return [
            path(
                self._create_url_path(action),
                self._get_view_func(action),
                name=self._create_route_name(action)
            )
            for action in self.actions
        ]

    def _create_url_path(self, action):
        patterns = {
            NEW: '{resource}/{action}',
            EDIT: '{resource}/{action}',
            DELETE: '{resource}/{action}',
            LIST: '{resource}/',
        }
        pattern = patterns.get(action, '{resource}/{action}')

        return pattern.format(resource=self.resource_name, action=action)

    def _get_view_func(self, action):
        return getattr(self.views_module, f'{self.resource_name}_{action}')

    def _create_route_name(self, action):
        return f'{self.resource_name}-{action}'


class Router:
    def __init__(self, views_module):
        self.views_module = import_module(views_module)
        self.resources = []

    def register(self, resource_name, actions=DEFAULT_ACTIONS):
        self.resources.append(Resource(resource_name, actions, self.views_module))

    @property
    def urlpatterns(self):
        paths = []
        for resource in self.resources:
            paths += resource.paths

        return paths