feat(devops): Feature Flagging DRF Router wrapper

ref: #675 #575

app/centurion_feature_flag/urls/routers.py

@@ -0,0 +1,99 @@
+from rest_framework.routers import (
+    APIRootView as DRFAPIRootView,
+    BaseRouter as DRFBaseRouter,
+    DefaultRouter as DRFDefaultRouter,
+    SimpleRouter as DRFSimpleRouter,
+)
+
+from app import settings
+
+from centurion_feature_flag.lib.feature_flag import CenturionFeatureFlagging
+
+
+
+class BaseRouter(
+    DRFBaseRouter,
+):
+
+
+    _feature_flagging: CenturionFeatureFlagging = None
+
+
+    def register(self, prefix, viewset, feature_flag=None, basename=None):
+
+        enabled = True
+
+        if feature_flag is not None:
+
+            if not self._feature_flagging[feature_flag]:
+
+                enabled = False
+
+        if(
+            enabled
+            or feature_flag is None
+        ):
+
+            super().register(prefix, viewset, basename=basename)
+
+
+
+class APIRootView(
+    DRFAPIRootView,
+):
+
+    def __init__(self, **kwargs):
+
+        super().__init__(**kwargs)
+
+        if getattr(settings,'feature_flag', None):
+
+            self._feature_flagging = CenturionFeatureFlagging(
+                url = settings.feature_flag['url'],
+                user_agent = settings.feature_flag['user_agent'],
+                cache_dir = settings.feature_flag['cache_dir']
+            )
+
+
+
+class SimpleRouter(
+    BaseRouter,
+    DRFSimpleRouter,
+):
+
+    def __init__(self, trailing_slash=True, use_regex_path=True):
+
+        super().__init__(trailing_slash=trailing_slash, use_regex_path=use_regex_path)
+
+        if getattr(settings,'feature_flag', None):
+
+            self._feature_flagging = CenturionFeatureFlagging(
+                url = settings.feature_flag['url'],
+                user_agent = settings.feature_flag['user_agent'],
+                cache_dir = settings.feature_flag['cache_dir']
+            )
+
+            self._feature_flagging.get()
+
+
+
+class DefaultRouter(
+    BaseRouter,
+    DRFDefaultRouter,
+):
+
+
+
+    def __init__(self, *args, **kwargs):
+
+        super().__init__(*args, **kwargs)
+
+        if getattr(settings,'feature_flag', None):
+
+            self._feature_flagging = CenturionFeatureFlagging(
+                url = settings.feature_flag['url'],
+                user_agent = settings.feature_flag['user_agent'],
+                cache_dir = settings.feature_flag['cache_dir']
+            )
+
+            self._feature_flagging.get()