Make it possible to set the instance admin

calsocial/__init__.py

@@ -19,8 +19,10 @@
 
 from datetime import datetime
 import os
+from warnings import warn
 
-from flask import Flask, abort, current_app, redirect, render_template, request, url_for
+from flask import Flask, abort, current_app, has_app_context, redirect, render_template, request, \
+    url_for
 from flask_babelex import Babel, get_locale as babel_get_locale
 from flask_security import SQLAlchemyUserDatastore, current_user, login_required
 from sqlalchemy.orm.exc import NoResultFound, MultipleResultsFound
@@ -127,9 +129,6 @@ class CalendarSocialApp(Flask, RoutedMixin):
         """The default time zone of the app
         """
 
-        from warnings import warn
-
-        from flask import has_app_context
         from pytz import timezone, utc
         from pytz.exceptions import UnknownTimeZoneError
 
@@ -148,6 +147,32 @@ class CalendarSocialApp(Flask, RoutedMixin):
 
         return self._timezone
 
+    @property
+    def instance_admin(self):
+        """The admin user of this instance
+        """
+
+        from calsocial.models import AppState, User
+
+        if not has_app_context():
+            return None
+
+        admin_id = AppState['instance_admin']
+
+        try:
+            admin_id = int(admin_id)
+        except (TypeError, ValueError):
+            warn(f'Instance admin is not set correctly (value is {admin_id})')
+
+            return None
+
+        try:
+            return User.query.filter(User.id == admin_id).one()
+        except NoResultFound:
+            warn(f'Instance admin is not set correctly (value is {admin_id})')
+
+        return None
+
     @staticmethod
     def _current_calendar():
         from .calendar_system.gregorian import GregorianCalendar