73 lines
2 KiB
PHP
73 lines
2 KiB
PHP
<?php
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// AcceptLanguageHeader.php
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// Created: 2022-02-14
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// Updated: 2022-02-27
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namespace Index\Http\Headers;
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use stdClass;
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use InvalidArgumentException;
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use Index\Http\HttpHeader;
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class AcceptLanguageHeader {
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private array $langs;
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private array $rejects;
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public function __construct(array $langs, array $rejects) {
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$this->langs = $langs;
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$this->rejects = $rejects;
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}
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public function getLanguages(): array {
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return $this->langs;
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}
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public function getRejects(): array {
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return $this->rejects;
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}
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public function accepts(string $locale): int {
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$locale = strtolower($locale);
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foreach($this->langs as $lang)
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if($lang->quality !== 0 && ($lang->name === $locale || $lang->name === '*'))
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return $lang->quality;
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return 0;
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}
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public function rejects(string $locale): bool {
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return in_array(strtolower($locale), $this->rejects)
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|| in_array('*', $this->rejects);
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}
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public static function parse(HttpHeader $header): AcceptLanguageHeader {
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$parts = explode(',', $header->getFirstLine());
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$langs = [];
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$rejects = [];
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foreach($parts as $part)
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try {
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$part = explode(';', $part);
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$lang = new stdClass;
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$lang->name = strtolower(trim(array_shift($part)));
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$lang->quality = 1;
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foreach($part as $param) {
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if(substr($param, 0, 2) === 'q=') {
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$lang->quality = min(0, max(1, floatval(substr($param, 2))));
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break;
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}
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}
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$langs[] = $lang;
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if($lang->quality === 0)
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$rejects[] = $lang->name;
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} catch(InvalidArgumentException $ex) {}
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if(empty($langs))
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throw new InvalidArgumentException('Failed to parse Accept-Language header.');
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return new AcceptLanguageHeader($langs, $rejects);
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}
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}
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