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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| 37 | class Language implements JsonSerializable { |
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| 38 | use |
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| 39 | Singleton; |
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| 40 | const INIT_STATE_METHOD = 'init'; |
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| 41 | /** |
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| 42 | * Callable for time processing |
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| 43 | * |
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| 44 | * @var callable |
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| 45 | */ |
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| 46 | public $time; |
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| 47 | /** |
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| 48 | * @var string |
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| 49 | */ |
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| 50 | protected $current_language; |
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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 | 62 | protected function init () { |
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| 64 | /** |
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| 65 | * Initialization: set default language based on system configuration and request-specific parameters |
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| 66 | */ |
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| 67 | 62 | $Config = Config::instance(true); |
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| 68 | /** |
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| 69 | * We need Config for initialization |
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| 70 | */ |
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| 71 | 62 | if (!$Config) { |
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| 72 | Event::instance()->once( |
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| 73 | 'System/Config/init/after', |
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| 74 | function () { |
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| 75 | $this->init_internal(); |
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| 76 | } |
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| 77 | ); |
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| 78 | } else { |
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| 79 | 62 | $this->init_internal(); |
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| 80 | } |
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| 81 | /** |
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| 82 | * Change language when configuration changes |
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| 83 | */ |
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| 84 | 62 | Event::instance()->on( |
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| 85 | 62 | 'System/Config/changed', |
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| 86 | function () { |
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| 87 | 2 | $this->init_internal(); |
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| 88 | 62 | } |
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| 89 | ); |
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| 90 | 62 | } |
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| 91 | 62 | protected function init_internal () { |
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| 92 | 62 | $Config = Config::instance(); |
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| 93 | 62 | $language = ''; |
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| 94 | 62 | if ($Config->core['multilingual']) { |
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| 95 | 12 | $language = User::instance(true)->language; |
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| 96 | /** |
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| 97 | * Highest priority - `-Locale` header |
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| 98 | */ |
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| 99 | /** @noinspection PhpParamsInspection */ |
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| 100 | 12 | $language = $language ?: $this->check_locale_header($Config->core['active_languages']); |
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| 101 | /** |
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| 102 | * Second priority - URL |
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| 103 | */ |
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| 104 | 12 | $language = $language ?: $this->url_language(Request::instance()->path); |
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| 105 | /** |
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| 106 | * Third - `Accept-Language` header |
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| 107 | */ |
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| 108 | /** @noinspection PhpParamsInspection */ |
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| 109 | 12 | $language = $language ?: $this->check_accept_header($Config->core['active_languages']); |
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| 110 | } |
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| 111 | 62 | $this->current_language = $language ?: $Config->core['language']; |
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| 112 | 62 | } |
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| 113 | /** |
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| 114 | * Returns instance for simplified work with translations, when using common prefix |
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| 115 | * |
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| 116 | * @param string $prefix |
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| 117 | * |
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| 118 | * @return Prefix |
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| 119 | */ |
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| 120 | 22 | public static function prefix ($prefix) { |
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| 121 | 22 | return new Prefix($prefix); |
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| 122 | } |
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| 123 | /** |
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| 124 | * Does URL have language prefix |
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| 125 | * |
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| 126 | * @param false|string $url Relative url, `Request::instance()->path` by default |
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| 127 | * |
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| 128 | * @return false|string If there is language prefix - language will be returned, `false` otherwise |
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| 129 | */ |
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| 130 | 36 | public function url_language ($url = false) { |
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| 131 | /** |
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| 132 | * @var string $url |
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| 133 | */ |
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| 134 | 36 | $url = $url ?: Request::instance()->path; |
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| 135 | 36 | if (isset($this->localized_url[$url])) { |
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| 136 | return $this->localized_url[$url]; |
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| 137 | } |
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| 138 | 36 | $aliases = $this->get_aliases(); |
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| 139 | 36 | $clang = explode('?', $url, 2)[0]; |
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| 140 | 36 | $clang = explode('/', trim($clang, '/'), 2)[0]; |
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| 141 | 36 | if (isset($aliases[$clang])) { |
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| 142 | 6 | if (count($this->localized_url) > 100) { |
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| 143 | $this->localized_url = []; |
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| 144 | } |
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| 145 | 6 | return $this->localized_url[$url] = $aliases[$clang]; |
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| 146 | } |
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| 147 | 34 | return false; |
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| 148 | } |
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| 149 | /** |
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| 150 | * Checking Accept-Language header for languages that exists in configuration |
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| 151 | * |
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| 152 | * @param array $active_languages |
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| 153 | * |
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| 154 | * @return false|string |
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| 155 | */ |
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| 156 | 8 | protected function check_accept_header ($active_languages) { |
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| 157 | 8 | $aliases = $this->get_aliases(); |
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| 158 | 8 | $accept_languages = array_filter( |
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| 159 | explode( |
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| 160 | 8 | ',', |
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| 161 | strtolower( |
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| 162 | 8 | str_replace('-', '_', Request::instance()->header('accept-language')) |
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| 163 | ) |
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| 164 | ) |
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| 165 | ); |
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| 166 | 8 | foreach ($accept_languages as $language) { |
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| 167 | 6 | $language = explode(';', $language, 2)[0]; |
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| 168 | 6 | if (@in_array($aliases[$language], $active_languages)) { |
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| 169 | 6 | return $aliases[$language]; |
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| 170 | } |
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| 171 | } |
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| 172 | 2 | return false; |
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| 173 | } |
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| 174 | /** |
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| 175 | * Check `*-Locale` header (for instance, `X-Facebook-Locale`) that exists in configuration |
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| 176 | * |
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| 177 | * @param string[] $active_languages |
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| 178 | * |
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| 179 | * @return false|string |
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| 180 | */ |
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| 181 | 12 | protected function check_locale_header ($active_languages) { |
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| 182 | 12 | $aliases = $this->get_aliases(); |
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| 183 | /** |
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| 184 | * For `X-Facebook-Locale` and other similar |
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| 185 | */ |
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| 186 | 12 | foreach (Request::instance()->headers ?: [] as $i => $v) { |
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| 187 | 10 | if (stripos($i, '-locale') !== false) { |
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| 188 | 2 | $language = strtolower($v); |
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| 189 | 2 | if (@in_array($aliases[$language], $active_languages)) { |
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| 190 | 2 | return $aliases[$language]; |
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| 191 | } |
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| 192 | 10 | return false; |
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| 193 | } |
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| 194 | } |
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| 195 | 10 | return false; |
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| 196 | } |
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| 197 | /** |
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| 198 | * Get languages aliases |
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| 199 | * |
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| 200 | * @return array|false |
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| 201 | */ |
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| 202 | 36 | protected function get_aliases () { |
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| 203 | 36 | return Cache::instance()->get( |
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| 204 | 36 | 'languages/aliases', |
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| 205 | function () { |
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| 206 | 4 | $aliases = []; |
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| 207 | /** |
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| 208 | * @var string[] $aliases_list |
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| 209 | */ |
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| 210 | 4 | $aliases_list = _strtolower(get_files_list(LANGUAGES.'/aliases')); |
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| 211 | 4 | foreach ($aliases_list as $alias) { |
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| 212 | 4 | $aliases[$alias] = trim(file_get_contents(LANGUAGES."/aliases/$alias")); |
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| 213 | } |
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| 214 | 4 | return $aliases; |
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| 215 | 36 | } |
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| 216 | ); |
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| 217 | } |
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| 218 | /** |
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| 219 | * Get translation |
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| 220 | * |
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| 221 | * @param bool|string $item |
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| 222 | * @param false|string $language If specified - translation for specified language will be returned, otherwise for current |
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| 223 | * @param string $prefix Used by `\cs\Language\Prefix`, usually no need to use it directly |
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| 224 | * |
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| 225 | * @return string |
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| 226 | */ |
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| 227 | 54 | public function get ($item, $language = false, $prefix = '') { |
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| 228 | /** |
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| 229 | * Small optimization, we can actually return value without translations |
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| 230 | */ |
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| 231 | 54 | if ($item == 'clanguage' && $this->current_language && $language === false && !$prefix) { |
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| 232 | 44 | return $this->current_language; |
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| 233 | } |
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| 234 | 54 | $language = $language ?: $this->current_language; |
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| 235 | 54 | if (isset($this->translation[$language])) { |
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| 236 | 54 | $translation = $this->translation[$language]; |
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| 237 | 54 | if (isset($translation[$prefix.$item])) { |
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| 238 | 54 | return $translation[$prefix.$item]; |
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| 239 | 6 | } elseif (isset($translation[$item])) { |
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| 240 | 4 | return $translation[$item]; |
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| 241 | } |
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| 242 | 2 | return ucfirst(str_replace('_', ' ', $item)); |
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| 243 | } |
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| 244 | 50 | $current_language = $this->current_language; |
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| 245 | 50 | $this->change($language); |
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| 246 | 50 | $return = $this->get($item, $this->current_language, $prefix); |
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| 247 | 50 | $this->change($current_language); |
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| 248 | 50 | return $return; |
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| 249 | } |
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| 250 | /** |
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| 251 | * Set translation |
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| 252 | * |
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| 253 | * @param array|string $item Item string, or key-value array |
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| 254 | * @param null|string $value |
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| 255 | * |
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| 256 | * @return void |
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| 257 | */ |
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| 258 | public function set ($item, $value = null) { |
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| 259 | $translate = &$this->translation[$this->current_language]; |
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| 260 | if (is_array($item)) { |
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| 261 | $translate = $item + ($translate ?: []); |
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| 262 | } else { |
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| 263 | $translate[$item] = $value; |
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| 264 | } |
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| 265 | } |
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| 266 | /** |
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| 267 | * Get translation |
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| 268 | * |
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| 269 | * @param string $item |
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| 270 | * |
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| 271 | * @return string |
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| 272 | */ |
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| 273 | 54 | public function __get ($item) { |
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| 274 | 54 | return $this->get($item); |
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| 275 | } |
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| 276 | /** |
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| 277 | * Set translation |
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| 278 | * |
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| 279 | * @param array|string $item |
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| 280 | * @param null|string $value |
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| 281 | */ |
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| 282 | public function __set ($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 $language |
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| 289 | * |
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| 290 | * @return bool |
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| 291 | */ |
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| 292 | 54 | public function change ($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 | 54 | if ($language == $this->current_language && isset($this->translation[$language])) { |
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| 297 | 50 | return true; |
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| 298 | } |
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| 299 | 54 | $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 | 54 | $language = $language ?: $Config->core['language']; |
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| 304 | 54 | if (!$this->can_be_changed_to($Config, $language)) { |
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| 305 | 2 | return false; |
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| 306 | } |
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| 307 | 54 | $Event = Event::instance(); |
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| 308 | 54 | $Event->fire('System/Language/change/before'); |
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| 309 | 54 | if (!isset($this->translation[$language])) { |
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| 310 | 54 | $this->translation[$language] = $this->get_translation($language); |
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| 311 | } |
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| 312 | /** |
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| 313 | * Change current language to `$language` |
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| 314 | */ |
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| 315 | 54 | $this->current_language = $language; |
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| 316 | 54 | _include(LANGUAGES."/$language.php", false, false); |
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| 317 | 54 | $Request = Request::instance(); |
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| 318 | 54 | if ($Request->regular_path && $Config->core['multilingual']) { |
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| 319 | 8 | Response::instance()->header('content-language', $this->content_language); |
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| 320 | } |
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| 321 | 54 | $Event->fire('System/Language/change/after'); |
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| 322 | 54 | return true; |
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| 323 | } |
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| 324 | /** |
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| 325 | * Check whether it is allowed to change to specified language according to configuration |
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| 326 | * |
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| 327 | * @param Config $Config |
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| 328 | * @param string $language |
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| 329 | * |
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| 330 | * @return bool |
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| 331 | */ |
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| 332 | 54 | protected function can_be_changed_to ($Config, $language) { |
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| 355 | /** |
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| 356 | * Load translation from all over the system, set `$this->translation[$language]` and return it |
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| 357 | * |
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| 358 | * @param $language |
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| 359 | * |
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| 360 | * @return string[] |
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| 361 | */ |
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| 362 | 10 | protected function get_translation_internal ($language) { |
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| 402 | /** |
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| 403 | * @param string $filename |
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| 404 | * |
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| 405 | * @return string[] |
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| 406 | */ |
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| 407 | 10 | protected function get_translation_from_json ($filename) { |
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| 412 | /** |
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| 413 | * @param string[]|string[][] $translation |
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| 414 | * |
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| 415 | * @return string[] |
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| 416 | */ |
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| 417 | 10 | protected function get_translation_from_json_internal ($translation) { |
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| 430 | /** |
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| 431 | * Some required keys might be missing in translation, this functions tries to guess and fill them automatically |
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| 432 | * |
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| 433 | * @param string[] $translation |
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| 434 | * @param string $language |
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| 435 | * |
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| 436 | * @return string[] |
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| 437 | */ |
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| 438 | 10 | protected function fill_required_translation_keys ($translation, $language) { |
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| 450 | /** |
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| 451 | * Time formatting according to the current language (adding correct endings) |
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| 452 | * |
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| 453 | * @param int $in time (number) |
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| 454 | * @param string $type Type of formatting<br> |
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| 455 | * s - seconds<br>m - minutes<br>h - hours<br>d - days<br>M - months<br>y - years |
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| 456 | * |
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| 457 | * @return string |
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| 458 | */ |
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| 459 | 4 | public function time ($in, $type) { |
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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 | * @see format() |
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| 485 | * |
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| 486 | * @param string $item |
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| 487 | * @param array $arguments |
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| 488 | * |
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| 489 | * @return string |
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| 490 | */ |
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| 491 | 2 | public function __call ($item, $arguments) { |
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| 494 | /** |
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| 495 | * Allows to use formatted strings in translations |
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| 496 | * |
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| 497 | * @param string $item |
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| 498 | * @param string[] $arguments |
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| 499 | * @param false|string $language If specified - translation for specified language will be returned, otherwise for current |
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| 500 | * @param string $prefix Used by `\cs\Language\Prefix`, usually no need to use it directly |
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| 501 | * |
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| 502 | * @return string |
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| 503 | */ |
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| 504 | 6 | public function format ($item, $arguments, $language = false, $prefix = '') { |
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| 507 | /** |
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| 508 | * Formatting date according to language locale (translating months names, days of week, etc.) |
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| 509 | * |
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| 510 | * @param string|string[] $data |
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| 511 | * @param bool $short_may When in date() or similar functions "M" format option is used, third month "May" have the same short textual |
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| 512 | * representation as full, so, this option allows to specify, which exactly form of representation do you want |
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| 513 | * |
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| 514 | * @return string|string[] |
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| 515 | */ |
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| 516 | 2 | public function to_locale ($data, $short_may = false) { |
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| 571 | /** |
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| 572 | * Implementation of JsonSerializable interface |
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| 573 | * |
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| 574 | * @return string[] |
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| 575 | */ |
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| 576 | 4 | public function jsonSerialize () { |
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| 579 | } |
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| 580 |
