Add user tripcodes

Users can separate their name and a password with ## to create the
illusion of consistent posting.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/forms.py

@@ -8,9 +8,11 @@ from django.forms.models import fields_for_model
 from django.utils import timezone
 from django.utils.translation import gettext as _
 from guardian.shortcuts import get_objects_for_user
-from board.models import Ban, Post, Report, ReportReason, ReportRecord
 from hcaptcha.fields import hCaptchaField
 
+from board.models import Ban, Post, Report, ReportReason, ReportRecord
+from board.utils import generate_tripcode
+
 
 class PostForm(ModelForm):
     """
@@ -42,6 +44,13 @@ class PostForm(ModelForm):
             if not self.user or not self.user.has_perm("board.use_capcode", capcode):
                 raise ValidationError(_("Could not create post"))
 
+    def clean_name(self):
+        name = self.cleaned_data["name"]
+        if "##" in name:
+            name, password = [v.strip() for v in name.split("##", 1)]
+            self.instance.tripcode = generate_tripcode(password)
+        return name
+
 
 class ReplyForm(PostForm):
     """