--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/comments/forms.py	Sat May 05 17:10:48 2012 -0500
@@ -0,0 +1,74 @@
+"""
+Forms for the comments application.
+"""
+import datetime
+from django import forms
+from django.conf import settings
+from django.contrib.contenttypes.models import ContentType
+
+from comments.models import Comment
+
+COMMENT_MAX_LENGTH = getattr(settings, 'COMMENT_MAX_LENGTH', 3000)
+
+class CommentForm(forms.Form):
+    comment = forms.CharField(label='',
+            min_length=1,
+            max_length=COMMENT_MAX_LENGTH,
+            widget=forms.Textarea(attrs={'class': 'markItUp smileyTarget'}))
+    content_type = forms.CharField(widget=forms.HiddenInput)
+    object_pk = forms.CharField(widget=forms.HiddenInput)
+
+    def __init__(self, target_object, data=None, initial=None):
+        self.target_object = target_object
+        if initial is None:
+            initial = {}
+        initial.update({
+            'content_type': str(self.target_object._meta),
+            'object_pk': str(self.target_object.pk),
+            })
+        super(CommentForm, self).__init__(data=data, initial=initial)
+
+    def get_comment_object(self, user, ip_address):
+        """
+        Return a new (unsaved) comment object based on the information in this
+        form. Assumes that the form is already validated and will throw a
+        ValueError if not.
+        """
+        if not self.is_valid():
+            raise ValueError("get_comment_object may only be called on valid forms")
+
+        new = Comment(
+            content_type = ContentType.objects.get_for_model(self.target_object),
+            object_id = self.target_object.pk,
+            user = user,
+            comment = self.cleaned_data["comment"],
+            ip_address = ip_address,
+            is_public = True,
+            is_removed = False,
+        )
+
+        # Check that this comment isn't duplicate. (Sometimes people post comments
+        # twice by mistake.) If it is, fail silently by returning the old comment.
+        today = datetime.date.today()
+        possible_duplicates = Comment.objects.filter(
+            content_type = new.content_type,
+            object_id = new.object_id,
+            user = new.user,
+            creation_date__year = today.year,
+            creation_date__month = today.month,
+            creation_date__day = today.day,
+        )
+        for old in possible_duplicates:
+            if old.comment == new.comment:
+                return old
+
+        return new
+
+    class Media:
+        css = {
+            'all': (settings.GPP_THIRD_PARTY_CSS['markitup'] +
+                settings.GPP_THIRD_PARTY_CSS['jquery-ui']),
+        }
+        js = (settings.GPP_THIRD_PARTY_JS['markitup'] +
+                settings.GPP_THIRD_PARTY_JS['jquery-ui'] +
+                ['js/comments.js'])