getresponse / includes / classes / Mustache / HelperCollection.php

HelperCollection.php in GetResponse Forms by Optin Cat 1.5.8, at includes/classes/Mustache/HelperCollection.php

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1	<?php
2
3	/*
4	* This file is part of Mustache.php.
5	*
6	* (c) 2010-2014 Justin Hileman
7	*
8	* For the full copyright and license information, please view the LICENSE
9	* file that was distributed with this source code.
10	*/
11
12	/**
13	* A collection of helpers for a Mustache instance.
14	*/
15	class Mustache_HelperCollection
16	{
17	private $helpers = array();
18
19	/**
20	* Helper Collection constructor.
21	*
22	* Optionally accepts an array (or Traversable) of `$name => $helper` pairs.
23	*
24	* @throws Mustache_Exception_InvalidArgumentException if the $helpers argument isn't an array or Traversable
25	*
26	* @param array\|Traversable $helpers (default: null)
27	*/
28	public function __construct($helpers = null)
29	{
30	if ($helpers === null) {
31	return;
32	}
33
34	if (!is_array($helpers) && !$helpers instanceof Traversable) {
35	throw new Mustache_Exception_InvalidArgumentException('HelperCollection constructor expects an array of helpers');
36	}
37
38	foreach ($helpers as $name => $helper) {
39	$this->add($name, $helper);
40	}
41	}
42
43	/**
44	* Magic mutator.
45	*
46	* @see Mustache_HelperCollection::add
47	*
48	* @param string $name
49	* @param mixed $helper
50	*/
51	public function __set($name, $helper)
52	{
53	$this->add($name, $helper);
54	}
55
56	/**
57	* Add a helper to this collection.
58	*
59	* @param string $name
60	* @param mixed $helper
61	*/
62	public function add($name, $helper)
63	{
64	$this->helpers[$name] = $helper;
65	}
66
67	/**
68	* Magic accessor.
69	*
70	* @see Mustache_HelperCollection::get
71	*
72	* @param string $name
73	*
74	* @return mixed Helper
75	*/
76	public function __get($name)
77	{
78	return $this->get($name);
79	}
80
81	/**
82	* Get a helper by name.
83	*
84	* @throws Mustache_Exception_UnknownHelperException If helper does not exist.
85	*
86	* @param string $name
87	*
88	* @return mixed Helper
89	*/
90	public function get($name)
91	{
92	if (!$this->has($name)) {
93	throw new Mustache_Exception_UnknownHelperException($name);
94	}
95
96	return $this->helpers[$name];
97	}
98
99	/**
100	* Magic isset().
101	*
102	* @see Mustache_HelperCollection::has
103	*
104	* @param string $name
105	*
106	* @return boolean True if helper is present
107	*/
108	public function __isset($name)
109	{
110	return $this->has($name);
111	}
112
113	/**
114	* Check whether a given helper is present in the collection.
115	*
116	* @param string $name
117	*
118	* @return boolean True if helper is present
119	*/
120	public function has($name)
121	{
122	return array_key_exists($name, $this->helpers);
123	}
124
125	/**
126	* Magic unset().
127	*
128	* @see Mustache_HelperCollection::remove
129	*
130	* @param string $name
131	*/
132	public function __unset($name)
133	{
134	$this->remove($name);
135	}
136
137	/**
138	* Check whether a given helper is present in the collection.
139	*
140	* @throws Mustache_Exception_UnknownHelperException if the requested helper is not present.
141	*
142	* @param string $name
143	*/
144	public function remove($name)
145	{
146	if (!$this->has($name)) {
147	throw new Mustache_Exception_UnknownHelperException($name);
148	}
149
150	unset($this->helpers[$name]);
151	}
152
153	/**
154	* Clear the helper collection.
155	*
156	* Removes all helpers from this collection
157	*/
158	public function clear()
159	{
160	$this->helpers = array();
161	}
162
163	/**
164	* Check whether the helper collection is empty.
165	*
166	* @return boolean True if the collection is empty
167	*/
168	public function isEmpty()
169	{
170	return empty($this->helpers);
171	}
172	}
173