[Plugin] auth_plain: Create admin user if installed and no users exist.

flaschengeist/plugins/auth_plain/__init__.py

@@ -9,10 +9,25 @@ import binascii
 from werkzeug.exceptions import BadRequest, NotFound
 
 from flaschengeist.plugins import AuthPlugin
-from flaschengeist.models.user import User
+from flaschengeist.models.user import User, Role, Permission
+from flaschengeist.database import db
+from flaschengeist import logger
 
 
 class AuthPlain(AuthPlugin):
+    def post_install(self):
+        if User.query.first() is None:
+            logger.info("Installing admin user")
+            role = Role(name="Superuser", permissions=Permission.query.all())
+            admin = User(userid="admin", firstname="Admin", lastname="Admin", mail="", roles_=[role])
+            self.modify_user(admin, None, "admin")
+            db.session.add(admin)
+            db.session.commit()
+            logger.warning("New administrator user was added, please change the password or remove it before going into"
+                           "production mode. Initial credentials:\n"
+                           "name: admin\n"
+                           "password: admin")
+
     def login(self, user: User, password: str):
         if user.has_attribute("password"):
             return AuthPlain._verify_password(user.get_attribute("password"), password)