<?php

/*
 * Copyright 2005 - 2025 Centreon (https://www.centreon.com/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * For more information : contact@centreon.com
 *
 */

declare(strict_types=1);

use Pimple\Container;

/**
 * Trait
 *
 * @class SingletonTrait
 */
trait SingletonTrait
{
    /**
     * @param Container $dependencyInjector
     * @return static
     */
    public static function getInstance(Container $dependencyInjector): static
    {
        /**
         * @var array<string, static> $instances
         */
        static $instances = [];

        /**
         * @var class-string<static> $calledClass
         */
        $calledClass = static::class;

        if (! isset($instances[$calledClass])) {
            $instances[$calledClass] = new $calledClass($dependencyInjector);
        }

        return $instances[$calledClass];
    }
}
