ajax decorator

[redakcja.git] / apps / wiki / helpers.py

diff --git a/apps/wiki/helpers.py b/apps/wiki/helpers.py
index 7ed97b4..8983e40 100644 (file)
--- a/apps/wiki/helpers.py
+++ b/apps/wiki/helpers.py
@@ -1,41 +1,64 @@
+# -*- coding: utf-8 -*-
+from datetime import datetime
+from functools import wraps
+
 from django import http
-from django.utils import simplejson as json
+import json
 from django.utils.functional import Promise
-from django.template.loader import render_to_string
-from datetime import datetime
+
 
 class ExtendedEncoder(json.JSONEncoder):
 
     def default(self, obj):
         if isinstance(obj, Promise):
-            return unicode(obj)  
-            
+            return unicode(obj)
+
         if isinstance(obj, datetime):
             return datetime.ctime(obj) + " " + (datetime.tzname(obj) or 'GMT')
-        
+
         return json.JSONEncoder.default(self, obj)
 
+
 # shortcut for JSON reponses
 class JSONResponse(http.HttpResponse):
-    
-    def __init__(self, data = {}, **kwargs):
+
+    def __init__(self, data=None, **kwargs):
+        if data is None:
+            data = {}
         # get rid of mimetype
         kwargs.pop('mimetype', None)
-                
-        super(JSONResponse, self).__init__(
-            json.dumps(data, cls=ExtendedEncoder), 
-            mimetype = "application/json", **kwargs)
-        
+
+        data = json.dumps(data, cls=ExtendedEncoder)
+        super(JSONResponse, self).__init__(data, mimetype="application/json", **kwargs)
+
 
 # return errors
 class JSONFormInvalid(JSONResponse):
-    def __init__(self, form):                 
-        super(JSONFormInvalid, self).__init__(form.errors, status = 400)
-    
-class JSONServerError(JSONResponse):    
+    def __init__(self, form):
+        super(JSONFormInvalid, self).__init__(form.errors, status=400)
+
+
+class JSONServerError(JSONResponse):
     def __init__(self, *args, **kwargs):
         kwargs['status'] = 500
         super(JSONServerError, self).__init__(*args, **kwargs)
-    
-    
-    
\ No newline at end of file
+
+
+def ajax_login_required(view):
+    @wraps(view)
+    def authenticated_view(request, *args, **kwargs):
+        if not request.user.is_authenticated():
+            return http.HttpResponse("Login required.", status=401, mimetype="text/plain")
+        return view(request, *args, **kwargs)
+    return authenticated_view
+
+
+def ajax_require_permission(permission):
+    def decorator(view):
+        @wraps(view)
+        def authorized_view(request, *args, **kwargs):
+            if not request.user.has_perm(permission):
+                return http.HttpResponse("Access Forbidden.", status=403, mimetype="text/plain")
+            return view(request, *args, **kwargs)
+        return authorized_view
+    return decorator