More javascript refactoring.

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

diff --git a/apps/wiki/helpers.py b/apps/wiki/helpers.py
new file mode 100644 (file)
index 0000000..7ed97b4
--- /dev/null
+++ b/apps/wiki/helpers.py
@@ -0,0 +1,41 @@
+from django import http
+from django.utils import simplejson as 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)  
+            
+        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):
+        # get rid of mimetype
+        kwargs.pop('mimetype', None)
+                
+        super(JSONResponse, self).__init__(
+            json.dumps(data, cls=ExtendedEncoder), 
+            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, *args, **kwargs):
+        kwargs['status'] = 500
+        super(JSONServerError, self).__init__(*args, **kwargs)
+    
+    
+    
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