Ticket #215: before-comment-created.patch

zine/forms.py

@@ -10 +10 @@
 """
 from copy import copy
 from datetime import datetime
+from itertools import chain
 import os
 
 from zine.i18n import _, lazy_gettext, list_languages
@@ -155 +156 @@
         is not a post req or the form is invalid the return value is None,
         otherwise a redirect response to the new comment.
         """
-        if req.method != 'POST' or not self.validate(req.form):
+        if req.method != 'POST':
+            return
+
+        valid = self.validate(req.form)
+
+        errors = emit_event('before-comment-created', req)
+        errors = filter(lambda x: x is not None, errors)
+        errors = list(chain(*errors))
+
+        if len(errors) > 0:
+            # update the form-wide error list with those added by the
+            # event handlers
+            error_list = self.errors.get(None, forms.ErrorList())
+            error_list.extend(errors)
+            self.errors[None] = error_list
+            return
+
+        if not valid:
             return
 
         # if we don't have errors let's save it and emit an