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<?php |
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namespace CodeZero\BrowserLocale; |
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class BrowserLocale |
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{ |
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/** |
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* Array of \CodeZero\BrowserLocale\Locale instances. |
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* |
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* @var array |
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*/ |
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protected $locales = []; |
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/** |
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* Supported filters for getLocales(). |
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* |
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* @var array |
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*/ |
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protected $filters = ['locale', 'language', 'country', 'weight']; |
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/** |
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* Create a new BrowserLocale instance. |
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* |
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* @param string $httpAcceptLanguages |
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*/ |
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public function __construct($httpAcceptLanguages) |
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{ |
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$this->parseHttpAcceptLanguages($httpAcceptLanguages); |
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} |
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/** |
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* Get the most preferred locale. |
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* |
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* @return \CodeZero\BrowserLocale\Locale|null |
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*/ |
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public function getLocale() |
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{ |
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return $this->locales[0] ?? null; |
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} |
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/** |
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* Get an array of Locale objects in descending order of preference. |
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* Specify a Locale property to get a flattened array of values of that property. |
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* |
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* @param string $property |
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* |
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* @return array |
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*/ |
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public function getLocales($property = null) |
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{ |
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if ( ! in_array($property, $this->filters)) { |
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return $this->locales; |
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} |
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return $this->filterLocaleInfo($property); |
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} |
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/** |
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* Parse all HTTP Accept Languages. |
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* |
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* @param string $httpAcceptLanguages |
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* |
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* @return void |
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*/ |
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protected function parseHttpAcceptLanguages($httpAcceptLanguages) |
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{ |
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$locales = $this->split($httpAcceptLanguages, ','); |
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foreach ($locales as $httpAcceptLanguage) { |
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$this->makeLocale($httpAcceptLanguage); |
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} |
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$this->sortLocales(); |
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} |
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/** |
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* Convert the given HTTP Accept Language to a Locale object. |
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* |
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* @param string $httpAcceptLanguage |
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* |
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* @return void |
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*/ |
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protected function makeLocale($httpAcceptLanguage) |
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{ |
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$parts = $this->split($httpAcceptLanguage, ';'); |
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$locale = $parts[0]; |
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$weight = $parts[1] ?? null; |
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if (empty($locale)) { |
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return; |
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} |
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$this->locales[] = new Locale( |
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$locale, |
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$this->getLanguage($locale), |
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$this->getCountry($locale), |
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$this->getWeight($weight) |
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); |
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} |
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/** |
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* Split the given string by the delimiter. |
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* |
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* @param string $string |
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* @param string $delimiter |
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* |
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* @return array |
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*/ |
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protected function split($string, $delimiter) |
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{ |
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return explode($delimiter, trim($string)) ?: []; |
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} |
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/** |
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* Get the 2-letter language code from the locale. |
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* |
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* @param string $locale |
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* |
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* @return string |
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*/ |
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protected function getLanguage($locale) |
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{ |
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return substr($locale, 0, 2) ?: ''; |
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} |
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/** |
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* Get the 2-letter country code from the locale. |
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* |
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* @param string $locale |
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* |
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* @return string |
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*/ |
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protected function getCountry($locale) |
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{ |
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return substr($locale, 3, 2) ?: ''; |
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} |
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/** |
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* Parse the relative quality factor and return its value. |
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* |
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* @param string $q |
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* |
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* @return float |
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*/ |
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protected function getWeight($q) |
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{ |
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$parts = $this->split($q, '='); |
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$weight = $parts[1] ?? 1.0; |
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return (float) $weight; |
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} |
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/** |
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* Sort the array of locales in descending order of preference. |
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* |
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* @return void |
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*/ |
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protected function sortLocales() |
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{ |
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usort($this->locales, function ($a, $b) { |
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if ($a->weight === $b->weight) { |
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return 0; |
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} |
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return ($a->weight > $b->weight) ? -1 : 1; |
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}); |
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} |
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/** |
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* Get a flattened array of locale information, |
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* containing only the requested property values. |
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* |
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* @param string $property |
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* |
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* @return array |
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*/ |
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protected function filterLocaleInfo($property) |
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{ |
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$filtered = []; |
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foreach ($this->locales as $locale) { |
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if ($locale->$property && ! in_array($locale->$property, $filtered)) { |
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$filtered[] = $locale->$property; |
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} |
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} |
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return $filtered; |
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} |
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} |
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codezero-be /
browser-locale
