GeminiLabs\Castor\AliasLoader

Complexity

Total Complexity

8

Size/Duplication

Total Lines	74
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	__clone()	0	2	1
A	__construct()	0	3	1
A	register()	0	5	2
A	getInstance()	0	11	2
A	load()	0	4	2

<?php

namespace GeminiLabs\Castor;

class AliasLoader
{
    /**
     * The singleton instance of the loader.
     *
     * @var AliasLoader
     */
    protected static $instance;

    /**
     * The array of class aliases.
     *
     * @var array
     */
    protected $aliases;

    /**
     * Indicates if a loader has been registered.
     *
     * @var bool
     */
    protected $registered = false;

    private function __construct(array $aliases)
    {
        $this->aliases = $aliases;
    }

    private function __clone()
    {
    }

    /**
     * Get or create the singleton alias loader instance.
     *
     * @return AliasLoader
     */
    public static function getInstance(array $aliases = [])
    {
        if (is_null(static::$instance)) {
            return static::$instance = new static($aliases);
        }

        $aliases = array_merge(static::$instance->aliases, $aliases);

        static::$instance->aliases = $aliases;

        return static::$instance;
    }

    /**
     * Load a class alias if it is registered.
     *
     * @param string $alias
     *
     * @return bool|null
     */
    public function load($alias)
    {
        if (isset($this->aliases[$alias])) {
            return class_alias($this->aliases[$alias], $alias);
        }
    }

    /**
     * Register the loader on the auto-loader stack.
     *
     * @return void
     */
    public function register()
    {
        if (!$this->registered) {
            spl_autoload_register([$this, 'load'], true, true);
            $this->registered = true;
        }
    }
}