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1<?php
2
3/*
4 * This file is part of the Symfony package.
5 *
6 * (c) Fabien Potencier <fabien@symfony.com>
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 Symfony\Component\Intl;
13
14use Symfony\Component\Icu\IcuCurrencyBundle;
15use Symfony\Component\Icu\IcuData;
16use Symfony\Component\Icu\IcuLanguageBundle;
17use Symfony\Component\Icu\IcuLocaleBundle;
18use Symfony\Component\Icu\IcuRegionBundle;
19use Symfony\Component\Intl\ResourceBundle\Reader\BufferedBundleReader;
20use Symfony\Component\Intl\ResourceBundle\Reader\StructuredBundleReader;
21
22/**
23 * Gives access to internationalization data.
24 *
25 * @author Bernhard Schussek <bschussek@gmail.com>
26 */
27class Intl
28{
29 /**
30 * The number of resource bundles to buffer. Loading the same resource
31 * bundle for n locales takes up n spots in the buffer.
32 */
33 const BUFFER_SIZE = 10;
34
35 /**
36 * @var ResourceBundle\CurrencyBundleInterface
37 */
38 private static $currencyBundle;
39
40 /**
41 * @var ResourceBundle\LanguageBundleInterface
42 */
43 private static $languageBundle;
44
45 /**
46 * @var ResourceBundle\LocaleBundleInterface
47 */
48 private static $localeBundle;
49
50 /**
51 * @var ResourceBundle\RegionBundleInterface
52 */
53 private static $regionBundle;
54
55 /**
56 * @var string|Boolean|null
57 */
58 private static $icuVersion = false;
59
60 /**
61 * @var string
62 */
63 private static $icuDataVersion = false;
64
65 /**
66 * @var ResourceBundle\Reader\StructuredBundleReaderInterface
67 */
68 private static $bundleReader;
69
70 /**
71 * Returns whether the intl extension is installed.
72 *
73 * @return Boolean Returns true if the intl extension is installed, false otherwise.
74 */
75 public static function isExtensionLoaded()
76 {
77 return class_exists('\ResourceBundle');
78 }
79
80 /**
81 * Returns the bundle containing currency information.
82 *
83 * @return ResourceBundle\CurrencyBundleInterface The currency resource bundle.
84 */
85 public static function getCurrencyBundle()
86 {
87 if (null === self::$currencyBundle) {
88 self::$currencyBundle = new IcuCurrencyBundle(self::getBundleReader());
89 }
90
91 return self::$currencyBundle;
92 }
93
94 /**
95 * Returns the bundle containing language information.
96 *
97 * @return ResourceBundle\LanguageBundleInterface The language resource bundle.
98 */
99 public static function getLanguageBundle()
100 {
101 if (null === self::$languageBundle) {
102 self::$languageBundle = new IcuLanguageBundle(self::getBundleReader());
103 }
104
105 return self::$languageBundle;
106 }
107
108 /**
109 * Returns the bundle containing locale information.
110 *
111 * @return ResourceBundle\LocaleBundleInterface The locale resource bundle.
112 */
113 public static function getLocaleBundle()
114 {
115 if (null === self::$localeBundle) {
116 self::$localeBundle = new IcuLocaleBundle(self::getBundleReader());
117 }
118
119 return self::$localeBundle;
120 }
121
122 /**
123 * Returns the bundle containing region information.
124 *
125 * @return ResourceBundle\RegionBundleInterface The region resource bundle.
126 */
127 public static function getRegionBundle()
128 {
129 if (null === self::$regionBundle) {
130 self::$regionBundle = new IcuRegionBundle(self::getBundleReader());
131 }
132
133 return self::$regionBundle;
134 }
135
136 /**
137 * Returns the version of the installed ICU library.
138 *
139 * @return null|string The ICU version or NULL if it could not be determined.
140 */
141 public static function getIcuVersion()
142 {
143 if (false === self::$icuVersion) {
144 if (!self::isExtensionLoaded()) {
145 self::$icuVersion = self::getIcuStubVersion();
146 } elseif (defined('INTL_ICU_VERSION')) {
147 self::$icuVersion = INTL_ICU_VERSION;
148 } else {
149 try {
150 $reflector = new \ReflectionExtension('intl');
151 ob_start();
152 $reflector->info();
153 $output = strip_tags(ob_get_clean());
154 preg_match('/^ICU version (?:=>)?(.*)$/m', $output, $matches);
155
156 self::$icuVersion = trim($matches[1]);
157 } catch (\ReflectionException $e) {
158 self::$icuVersion = null;
159 }
160 }
161 }
162
163 return self::$icuVersion;
164 }
165
166 /**
167 * Returns the version of the installed ICU data.
168 *
169 * @return string The version of the installed ICU data.
170 */
171 public static function getIcuDataVersion()
172 {
173 if (false === self::$icuDataVersion) {
174 self::$icuDataVersion = IcuData::getVersion();
175 }
176
177 return self::$icuDataVersion;
178 }
179
180 /**
181 * Returns the ICU version that the stub classes mimic.
182 *
183 * @return string The ICU version of the stub classes.
184 */
185 public static function getIcuStubVersion()
186 {
187 return '50.1.2';
188 }
189
190 /**
191 * Returns a resource bundle reader for .php resource bundle files.
192 *
193 * @return ResourceBundle\Reader\StructuredBundleReaderInterface The resource reader.
194 */
195 private static function getBundleReader()
196 {
197 if (null === self::$bundleReader) {
198 self::$bundleReader = new StructuredBundleReader(new BufferedBundleReader(
199 IcuData::getBundleReader(),
200 self::BUFFER_SIZE
201 ));
202 }
203
204 return self::$bundleReader;
205 }
206
207 /**
208 * This class must not be instantiated.
209 */
210 private function __construct() {}
211}