Fixed login with group functions

groups.py

@@ -0,0 +1,28 @@
+from flask import Blueprint, render_template, request
+from models import db
+from models import Group
+from flask_login import login_required, current_user
+
+groups_bp = Blueprint("groups", __name__)
+
+@groups_bp.route("/groups", methods=["GET", "POST"])
+@login_required
+def groups():
+    if not current_user.is_admin:
+        return "Forbidden", 403
+    error = ""
+
+    if request.method == "POST":
+        secret = request.form["secret"].strip()
+        if not secret:
+            error = "Group secret is required."
+        elif Group.query.filter_by(secret=secret).first():
+            error = "That group already exists."
+        else:
+            group = Group(secret=secret)
+            db.session.add(group)
+            db.session.commit()
+
+    return render_template("groups.html",
+                           groups=Group.query.order_by(Group.id).all(),
+                           error=error)