adding threadlocals and middleware abstracts

theming/middleware.py

@@ -0,0 +1,32 @@
+# -*- coding:utf-8 -*-
+'''
+@author: wTayyeb  https://github.com/wtayyeb
+@license: MIT
+'''
+
+from .models import ThemeManager
+from .threadlocals import set_thread_variable
+
+
+class ThemingMiddleware(object):
+    ''' Middleware that puts the request object in thread local storage.
+
+        add this middleware to MIDDLEWARE_CLASSES to make theming work.
+
+        MIDDLEWARE_CLASSES	 = (
+            ...
+            'theming.middleware.ThemingMiddleware',
+        )
+
+    '''
+
+    def process_request(self, request):
+        host = request.get_host()
+        mgr = ThemeManager()
+        mgr.set_host(host)
+
+        # why ?
+        set_thread_variable('theme_manager', mgr)
+
+        # why ?
+        set_thread_variable('request', request)

theming/threadlocals.py

@@ -0,0 +1,18 @@
+# -*- coding:utf-8 -*-
+'''
+@author: wTayyeb  https://github.com/wtayyeb
+@license: MIT
+'''
+
+from threading import local
+
+
+_threadlocals = local()
+
+
+def set_thread_variable(key, val):
+	setattr(_threadlocals, key, val)
+
+
+def get_thread_variable(key, default=None):
+	return getattr(_threadlocals, key, default)