Introduce wrapt and monkeypatch django.views.View so we have a setup method to override. (#279)

src/bornhack/settings.py

@@ -1,12 +1,27 @@
 import os
+import wrapt
+import django.views
+
 from .environment_settings import *
 
+
 def local_dir(entry):
     return os.path.join(
         os.path.dirname(os.path.dirname(__file__)),
         entry
     )
 
+
+# We do this hacky monkeypatching to enable us to define a setup method
+# on class based views for setting up variables without touching the dispatch
+# method.
+@wrapt.patch_function_wrapper(django.views.View, 'dispatch')
+def monkey_patched_dispatch(wrapped, instance, args, kwargs):
+    if hasattr(instance, 'setup'):
+        instance.setup(*args, **kwargs)
+    return wrapped(*args, **kwargs)
+
+
 DJANGO_BASE_PATH = os.path.dirname(os.path.dirname(__file__))
 
 WSGI_APPLICATION = 'bornhack.wsgi.application'

src/requirements/production.txt

@@ -37,3 +37,5 @@ six==1.10.0
 sqlparse==0.2.2
 venusian==1.0
 webencodings==0.5
+
+wrapt==1.10.11