<?php

/**
 * Part of the Support package.
 *
 * NOTICE OF LICENSE
 *
 * Licensed under the 3-clause BSD License.
 *
 * This source file is subject to the 3-clause BSD License that is
 * bundled with this package in the LICENSE file.
 *
 * @package    Support
 * @version    1.2.0
 * @author     Cartalyst LLC
 * @license    BSD License (3-clause)
 * @copyright  (c) 2011-2015, Cartalyst LLC
 * @link       http://cartalyst.com
 */

namespace Cartalyst\Support;

abstract class ServiceProvider extends \Illuminate\Support\ServiceProvider
{
    /**
     * The alias pattern.
     *
     * @var string
     */
    protected $aliasPattern = '{class}Interface';

    /**
     * Registers a binding if it hasn't already been registered.
     *
     * @param  string  $abstract
     * @param  \Closure|string|null  $concrete
     * @param  bool  $shared
     * @param  bool|string|null  $alias
     * @return void
     */
    protected function bindIf($abstract, $concrete = null, $shared = true, $alias = null)
    {
        if ( ! $this->app->bound($abstract)) {
            $concrete = $concrete ?: $abstract;

            $this->app->bind($abstract, $concrete, $shared);
        }

        $this->alias($abstract, $this->prepareAlias($alias, $concrete));
    }

    /**
     * Alias a type to a shorter name.
     *
     * @param  string  $abstract
     * @param  string  $alias
     * @return void
     */
    protected function alias($abstract, $alias)
    {
        if ($alias) {
            $this->app->alias($abstract, $alias);
        }
    }

    /**
     * Prepares the alias.
     *
     * @param  string  $alias
     * @param  mixed  $concrete
     * @return mixed
     */
    protected function prepareAlias($alias, $concrete)
    {
        if ( ! $alias && $alias !== false && ! $concrete instanceof \Closure) {
            $alias = str_replace('{class}', $concrete, $this->aliasPattern);
        }

        return $alias;
    }
}
