Improve handling of returning patrons

lib/Db.php

@@ -19,4 +19,24 @@ class Db{
 
 		return $GLOBALS['DbConnection']->Query($query, $args, $class);
 	}
+
+	public static function QueryInt(string $query, array $args = []): int{
+		// Useful for queries that return a single integer as a result, like count(*) or sum(*).
+
+		if(!isset($GLOBALS['DbConnection'])){
+			$GLOBALS['DbConnection'] = new DbConnection(DATABASE_DEFAULT_DATABASE, DATABASE_DEFAULT_HOST);
+		}
+
+		if(!is_array($args)){
+			$args = [$args];
+		}
+
+		$result = $GLOBALS['DbConnection']->Query($query, $args);
+
+		if(sizeof($result) > 0){
+			return current((Array)$result[0]);
+		}
+
+		return 0;
+	}
 }