add markup metadata to sig; reparse sigs on init

app/routes/users.py

@@ -3,7 +3,7 @@ from flask import (
     )
 from functools import wraps
 from ..db import db
-from ..lib.babycode import babycode_to_html
+from ..lib.babycode import babycode_to_html, BABYCODE_VERSION
 from ..models import Users, Sessions, Subscriptions, Avatars, PasswordResetLinks, InviteKeys
 from ..constants import InfoboxKind, PermissionLevel
 from ..auth import digest, verify
@@ -307,14 +307,19 @@ def settings_form(username):
     if topic_sort_by == 'activity' or topic_sort_by == 'thread':
         sort_by = session['sort_by'] = topic_sort_by
     status = request.form.get('status', default="")[:100]
-    original_sig = request.form.get('signature', default='')
-    rendered_sig = babycode_to_html(original_sig)
+    original_sig = request.form.get('signature', default='').strip()
+    if original_sig:
+        rendered_sig = babycode_to_html(original_sig)
+    else:
+        rendered_sig = ''
     session['subscribe_by_default'] = request.form.get('subscribe_by_default', default='off') == 'on'
 
     user.update({
         'status': status,
         'signature_original_markup': original_sig,
         'signature_rendered': rendered_sig,
+        'signature_format_version': BABYCODE_VERSION,
+        'signature_markup_language': 'babycode',
     })
     flash('Settings updated.', InfoboxKind.INFO)
     return redirect(url_for('.settings', username=user.username))