1<?php
2
3/*
4 * This file is part of the Assetic package, an OpenSky project.
5 *
6 * (c) 2010-2014 OpenSky Project Inc
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11
12namespace Assetic;
13
14use Assetic\Asset\AssetInterface;
15
16/**
17 * Manages assets.
18 *
19 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
20 */
21class AssetManager
22{
23    private $assets = array();
24
25    /**
26     * Gets an asset by name.
27     *
28     * @param string $name The asset name
29     *
30     * @return AssetInterface The asset
31     *
32     * @throws \InvalidArgumentException If there is no asset by that name
33     */
34    public function get($name)
35    {
36        if (!isset($this->assets[$name])) {
37            throw new \InvalidArgumentException(sprintf('There is no "%s" asset.', $name));
38        }
39
40        return $this->assets[$name];
41    }
42
43    /**
44     * Checks if the current asset manager has a certain asset.
45     *
46     * @param string $name an asset name
47     *
48     * @return Boolean True if the asset has been set, false if not
49     */
50    public function has($name)
51    {
52        return isset($this->assets[$name]);
53    }
54
55    /**
56     * Registers an asset to the current asset manager.
57     *
58     * @param string         $name  The asset name
59     * @param AssetInterface $asset The asset
60     *
61     * @throws \InvalidArgumentException If the asset name is invalid
62     */
63    public function set($name, AssetInterface $asset)
64    {
65        if (!ctype_alnum(str_replace('_', '', $name))) {
66            throw new \InvalidArgumentException(sprintf('The name "%s" is invalid.', $name));
67        }
68
69        $this->assets[$name] = $asset;
70    }
71
72    /**
73     * Returns an array of asset names.
74     *
75     * @return array An array of asset names
76     */
77    public function getNames()
78    {
79        return array_keys($this->assets);
80    }
81
82    /**
83     * Clears all assets.
84     */
85    public function clear()
86    {
87        $this->assets = array();
88    }
89}
90