place frontend controller

backend/tracim_backend/views/frontend.py

@@ -0,0 +1,47 @@
+import os
+
+from pyramid.response import Response
+from pyramid.config import Configurator
+from tracim_backend.exceptions import PageNotFound
+from tracim_backend.views import BASE_API_V2
+from tracim_backend.lib.utils.request import TracimRequest
+from tracim_backend.views.controllers import Controller
+
+INDEX_PAGE_NAME = 'index.html'
+
+
+class FrontendController(Controller):
+
+    def __init__(self, dist_folder_path: str):
+        self.dist_folder_path = dist_folder_path
+
+    def not_found_view(self, context, request: TracimRequest):
+
+        if request.path.startswith(BASE_API_V2):
+            raise PageNotFound('{} is not a valid path'.format(request.path)) from context
+        return self.index(context, request)
+
+    def index(self, context, request: TracimRequest):
+        index_file_path = os.path.join(self.dist_folder_path, INDEX_PAGE_NAME)
+        if not os.path.exists(index_file_path):
+            raise FileNotFoundError()
+        with open(index_file_path) as file:
+            return Response(
+                content_type='text/html',
+                body=file.read()
+            )
+
+    def bind(self, configurator: Configurator) -> None:
+
+        configurator.add_notfound_view(self.not_found_view)
+        # index.html for /index.html and /
+        configurator.add_route('root', '/', request_method='GET')
+        configurator.add_view(self.index, route_name='root')
+        configurator.add_route('index', INDEX_PAGE_NAME, request_method='GET')
+        configurator.add_view(self.index, route_name='index')
+
+        for dirname in os.listdir(self.dist_folder_path):
+            configurator.add_static_view(
+                name=dirname,
+                path=os.path.join(self.dist_folder_path, dirname)
+            )