nazar-pc /
CleverStyle-Framework
Complex classes like Language often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Language, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 33 | class Language implements JsonSerializable { |
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| 34 | use Singleton; |
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| 35 | /** |
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| 36 | * Callable for time processing |
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| 37 | * |
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| 38 | * @var callable |
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| 39 | */ |
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| 40 | public $time; |
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| 41 | /** |
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| 42 | * @var string |
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| 43 | */ |
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| 44 | protected $current_language; |
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| 45 | /** |
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| 46 | * For single initialization |
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| 47 | * |
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| 48 | * @var bool |
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| 49 | */ |
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| 50 | protected $init = false; |
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| 51 | /** |
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| 52 | * Local cache of translations |
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| 53 | * |
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| 54 | * @var array |
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| 55 | */ |
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| 56 | protected $translation = []; |
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| 57 | /** |
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| 58 | * Cache to optimize frequent calls |
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| 59 | * |
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| 60 | * @var array |
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| 61 | */ |
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| 62 | protected $localized_url = []; |
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| 63 | /** |
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| 64 | * Set basic language |
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| 65 | */ |
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| 66 | protected function construct () { |
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| 95 | /** |
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| 96 | * Initialization: set default language based on system configuration and request-specific parameters |
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| 97 | */ |
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| 98 | protected function init () { |
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| 99 | $Config = Config::instance(); |
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| 100 | if ($Config->core['multilingual']) { |
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| 101 | /** |
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| 102 | * Highest priority - `-Locale` header |
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| 103 | */ |
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| 104 | /** @noinspection PhpParamsInspection */ |
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| 105 | $language = $this->check_locale_header($Config->core['active_languages']); |
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| 106 | /** |
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| 107 | * Second priority - URL |
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| 108 | */ |
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| 109 | $language = $language ?: $this->url_language(Request::instance()->path); |
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| 110 | /** |
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| 111 | * Third - `Accept-Language` header |
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| 112 | */ |
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| 113 | /** @noinspection PhpParamsInspection */ |
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| 114 | $language = $language ?: $this->check_accept_header($Config->core['active_languages']); |
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| 115 | } else { |
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| 116 | $language = $Config->core['language']; |
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| 117 | } |
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| 118 | $this->current_language = $language ?: ''; |
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| 119 | } |
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| 120 | /** |
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| 121 | * Returns instance for simplified work with translations, when using common prefix |
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| 122 | * |
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| 123 | * @param string $prefix |
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| 124 | * |
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| 125 | * @return Prefix |
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| 126 | */ |
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| 127 | static function prefix ($prefix) { |
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| 130 | /** |
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| 131 | * Does URL have language prefix |
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| 132 | * |
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| 133 | * @param false|string $url Relative url, `Request::instance()->path` by default |
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| 134 | * |
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| 135 | * @return false|string If there is language prefix - language will be returned, `false` otherwise |
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| 136 | */ |
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| 137 | 32 | function url_language ($url = false) { |
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| 138 | /** |
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| 139 | * @var string $url |
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| 140 | */ |
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| 141 | 32 | $url = $url ?: Request::instance()->path; |
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| 142 | 32 | if (isset($this->localized_url[$url])) { |
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| 143 | return $this->localized_url[$url]; |
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| 144 | } |
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| 145 | 32 | $aliases = $this->get_aliases(); |
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| 146 | 32 | $clang = explode('?', $url, 2)[0]; |
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| 147 | 32 | $clang = explode('/', trim($clang, '/'), 2)[0]; |
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| 148 | 32 | if (isset($aliases[$clang])) { |
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| 149 | 4 | if (count($this->localized_url) > 100) { |
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| 150 | $this->localized_url = []; |
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| 151 | } |
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| 152 | 4 | return $this->localized_url[$url] = $aliases[$clang]; |
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| 153 | } |
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| 154 | 30 | return false; |
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| 155 | } |
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| 156 | /** |
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| 157 | * Checking Accept-Language header for languages that exists in configuration |
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| 158 | * |
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| 159 | * @param array $active_languages |
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| 160 | * |
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| 161 | * @return false|string |
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| 162 | */ |
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| 163 | protected function check_accept_header ($active_languages) { |
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| 181 | /** |
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| 182 | * Check `*-Locale` header (for instance, `X-Facebook-Locale`) that exists in configuration |
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| 183 | * |
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| 184 | * @param string[] $active_languages |
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| 185 | * |
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| 186 | * @return false|string |
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| 187 | */ |
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| 188 | protected function check_locale_header ($active_languages) { |
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| 204 | /** |
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| 205 | * Get languages aliases |
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| 206 | * |
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| 207 | * @return array|false |
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| 208 | */ |
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| 209 | protected function get_aliases () { |
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| 222 | /** |
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| 223 | * Get translation |
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| 224 | * |
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| 225 | * @param bool|string $item |
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| 226 | * @param false|string $language If specified - translation for specified language will be returned, otherwise for current |
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| 227 | * @param string $prefix Used by `\cs\Language\Prefix`, usually no need to use it directly |
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| 228 | * |
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| 229 | * @return string |
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| 230 | */ |
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| 231 | function get ($item, $language = false, $prefix = '') { |
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| 248 | /** |
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| 249 | * Set translation |
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| 250 | * |
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| 251 | * @param array|string $item Item string, or key-value array |
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| 252 | * @param null|string $value |
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| 253 | * |
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| 254 | * @return void |
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| 255 | */ |
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| 256 | function set ($item, $value = null) { |
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| 264 | /** |
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| 265 | * Get translation |
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| 266 | * |
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| 267 | * @param string $item |
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| 268 | * |
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| 269 | * @return string |
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| 270 | */ |
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| 271 | function __get ($item) { |
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| 274 | /** |
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| 275 | * Set translation |
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| 276 | * |
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| 277 | * @param array|string $item |
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| 278 | * @param null|string $value |
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| 279 | * |
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| 280 | * @return string |
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| 281 | */ |
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| 282 | function __set ($item, $value = null) { |
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| 285 | /** |
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| 286 | * Change language |
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| 287 | * |
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| 288 | * @param string $language |
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| 289 | * |
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| 290 | * @return bool |
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| 291 | */ |
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| 292 | function change ($language) { |
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| 293 | /** |
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| 294 | * Already set to specified language |
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| 295 | */ |
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| 296 | if ($language == $this->current_language && isset($this->translation[$language])) { |
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| 297 | return true; |
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| 298 | } |
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| 299 | $Config = Config::instance(true); |
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| 300 | /** |
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| 301 | * @var string $language |
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| 302 | */ |
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| 303 | $language = $language ?: $Config->core['language']; |
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| 304 | if (!$this->can_be_changed_to($Config, $language)) { |
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| 305 | return false; |
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| 306 | } |
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| 307 | if (!isset($this->translation[$language])) { |
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| 308 | $this->translation[$language] = $this->get_translation($language); |
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| 309 | } |
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| 310 | /** |
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| 311 | * Change current language to `$language` |
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| 312 | */ |
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| 313 | $this->current_language = $language; |
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| 314 | _include(LANGUAGES."/$language.php", false, false); |
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| 315 | if ($Config->core['multilingual']) { |
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| 316 | Response::instance()->header('content-language', $this->content_language); |
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| 317 | } |
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| 318 | return true; |
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| 319 | } |
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| 320 | /** |
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| 321 | * Check whether it is allowed to change to specified language according to configuration |
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| 322 | * |
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| 323 | * @param Config $Config |
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| 324 | * @param string $language |
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| 325 | * |
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| 326 | * @return bool |
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| 327 | */ |
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| 328 | protected function can_be_changed_to ($Config, $language) { |
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| 329 | if (!$language) { |
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| 330 | return false; |
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| 331 | } |
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| 332 | return |
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| 333 | // Config not loaded yet |
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| 334 | !$Config->core || |
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| 335 | // Set to language that is configured on system level |
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| 336 | $language == $Config->core['language'] || |
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| 337 | // Set to active language |
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| 338 | ( |
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| 339 | $Config->core['multilingual'] && |
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| 340 | in_array($language, $Config->core['active_languages']) |
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| 341 | ); |
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| 342 | } |
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| 343 | protected function get_translation ($language) { |
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| 344 | return Cache::instance()->get( |
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| 345 | "languages/$language", |
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| 346 | function () use ($language) { |
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| 347 | return $this->get_translation_internal($language); |
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| 348 | } |
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| 349 | ); |
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| 350 | } |
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| 351 | /** |
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| 352 | * Load translation from all over the system, set `$this->translation[$language]` and return it |
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| 353 | * |
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| 354 | * @param $language |
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| 355 | * |
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| 356 | * @return string[] |
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| 357 | */ |
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| 358 | protected function get_translation_internal ($language) { |
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| 359 | /** |
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| 360 | * Get current system translations |
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| 361 | */ |
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| 362 | $translation = $this->get_translation_from_json(LANGUAGES."/$language.json"); |
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| 363 | $translation = $this->fill_required_translation_keys($translation, $language); |
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| 364 | /** |
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| 365 | * Set modules' translations |
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| 366 | */ |
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| 367 | foreach (get_files_list(MODULES, false, 'd', true) as $module_dir) { |
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| 368 | if (file_exists("$module_dir/languages/$language.json")) { |
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| 369 | $translation = $this->get_translation_from_json("$module_dir/languages/$language.json") + $translation; |
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| 370 | } |
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| 371 | } |
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| 372 | Event::instance()->fire( |
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| 373 | 'System/general/languages/load', |
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| 374 | [ |
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| 375 | 'clanguage' => $language, |
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| 376 | 'clang' => $translation['clang'], |
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| 377 | 'cregion' => $translation['cregion'] |
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| 378 | ] |
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| 379 | ); |
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| 380 | /** |
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| 381 | * Append translations from core language to fill potentially missing keys |
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| 382 | */ |
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| 383 | $core_language = Core::instance()->language; |
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| 384 | if ($language != $core_language) { |
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| 385 | $translation += $this->get_translation($core_language); |
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| 386 | } |
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| 387 | return $translation; |
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| 388 | } |
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| 389 | /** |
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| 390 | * @param string $filename |
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| 391 | * |
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| 392 | * @return string[] |
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| 393 | */ |
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| 394 | protected function get_translation_from_json ($filename) { |
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| 395 | return $this->get_translation_from_json_internal( |
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| 396 | file_get_json_nocomments($filename) |
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| 397 | ); |
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| 398 | } |
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| 399 | /** |
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| 400 | * @param string[]|string[][] $translation |
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| 401 | * |
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| 402 | * @return string[] |
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| 403 | */ |
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| 404 | protected function get_translation_from_json_internal ($translation) { |
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| 417 | /** |
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| 418 | * Some required keys might be missing in translation, this functions tries to guess and fill them automatically |
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| 419 | * |
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| 420 | * @param string[] $translation |
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| 421 | * @param string $language |
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| 422 | * |
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| 423 | * @return string[] |
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| 424 | */ |
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| 425 | protected function fill_required_translation_keys ($translation, $language) { |
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| 437 | /** |
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| 438 | * Time formatting according to the current language (adding correct endings) |
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| 439 | * |
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| 440 | * @param int $in time (number) |
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| 441 | * @param string $type Type of formatting<br> |
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| 442 | * s - seconds<br>m - minutes<br>h - hours<br>d - days<br>M - months<br>y - years |
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| 443 | * |
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| 444 | * @return string |
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| 445 | */ |
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| 446 | function time ($in, $type) { |
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| 468 | /** |
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| 469 | * Allows to use formatted strings in translations |
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| 470 | * |
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| 471 | * @see format() |
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| 472 | * |
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| 473 | * @param string $item |
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| 474 | * @param array $arguments |
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| 475 | * |
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| 476 | * @return string |
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| 477 | */ |
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| 478 | function __call ($item, $arguments) { |
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| 481 | /** |
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| 482 | * Allows to use formatted strings in translations |
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| 483 | * |
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| 484 | * @param string $item |
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| 485 | * @param string[] $arguments |
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| 486 | * @param false|string $language If specified - translation for specified language will be returned, otherwise for current |
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| 487 | * @param string $prefix Used by `\cs\Language\Prefix`, usually no need to use it directly |
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| 488 | * |
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| 489 | * @return string |
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| 490 | */ |
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| 491 | function format ($item, $arguments, $language = false, $prefix = '') { |
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| 494 | /** |
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| 495 | * Formatting date according to language locale (translating months names, days of week, etc.) |
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| 496 | * |
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| 497 | * @param string|string[] $data |
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| 498 | * @param bool $short_may When in date() or similar functions "M" format option is used, third month "May" have the same short textual |
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| 499 | * representation as full, so, this option allows to specify, which exactly form of representation do you want |
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| 500 | * |
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| 501 | * @return string|string[] |
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| 502 | */ |
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| 503 | function to_locale ($data, $short_may = false) { |
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| 558 | /** |
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| 559 | * Implementation of JsonSerializable interface |
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| 560 | * |
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| 561 | * @return string[] |
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| 562 | */ |
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| 563 | function jsonSerialize () { |
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| 566 | } |
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| 567 |
