style and compatibility update

app/auth/routes.py

@@ -18,14 +18,18 @@ def before_request():
     Checks if a user is unconfirmed when visiting specific sites. Redirects to
     unconfirmed view if user is unconfirmed.
     """
-    if current_user.is_authenticated:
-        current_user.ping()
-        db.session.commit()
-        if (not current_user.confirmed
-                and request.endpoint
-                and request.blueprint != 'auth'
-                and request.endpoint != 'static'):
-            return redirect(url_for('auth.unconfirmed'))
+    if not current_user.is_authenticated:
+        return
+
+    current_user.ping()
+    db.session.commit()
+    if (not current_user.confirmed
+            and request.endpoint
+            and request.blueprint != 'auth'
+            and request.endpoint != 'static'):
+        return redirect(url_for('auth.unconfirmed'))
+    if not current_user.terms_of_use_accepted:
+        return redirect(url_for('main.terms_of_use'))
 
 
 @bp.route('/register', methods=['GET', 'POST'])