Create a routes constants file and a router for getting routes in app

src/constants/routes.py

@@ -0,0 +1,47 @@
+import abc
+from typing import Any, TypedDict
+from dataclasses import dataclass, asdict
+
+
+class ParamCodec[Params]:
+    @abc.abstractmethod
+    def parse(self, path) -> Params:
+        pass
+
+
+class EmptyParams(ParamCodec[None]):
+    def parse(self, path) -> None:
+        pass
+
+
+@dataclass
+class Route[Params: Any]:
+    path: str
+    codec: ParamCodec[Params]
+
+    def interpolate(self, params: Params) -> str:
+        interpolated = self.path
+        if params:
+            for k, v in asdict(params).items():
+                interpolated.replace(f':{k}', str(v))
+
+        return interpolated
+
+
+def static(path: str) -> Route[None]:
+    return Route(path, EmptyParams())
+
+
+class Routes(TypedDict):
+    index: Route[None]
+    confirm_email: Route[None]
+    signup: Route[None]
+    dashboard: Route[None]
+
+
+ROUTES: Routes = {
+    'index': static('/'),
+    'confirm_email': static('/confirm-email'),
+    'signup': static('/register'),
+    'dashboard': static('/dashboard'),
+}