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<?php declare(strict_types = 1); |
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/** |
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* Time string normalizer |
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* |
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* PHP version 7+ |
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* |
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* @category IntervalParser |
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* @author Ekin H. Bayar <[email protected]> |
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* @version 0.2.0 |
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*/ |
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namespace IntervalParser; |
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class Normalizer |
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{ |
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/** |
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* Used to turn a given non-strtotime-compatible time string into a compatible one |
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* Only modifies the non-strtotime-compatible time strings provided leaving the rest intact |
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* |
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* @var string $pattern |
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*/ |
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public static $pattern = <<<'REGEX' |
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~ |
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# grab the integer part of time string |
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\s? (?<int> \d{1,5}) \s? |
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# match only the shortest abbreviations that aren't supported by strtotime |
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(?<time> |
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(?: s (?=(?:ec(?:ond)?s?)?(?:\b|\d)) |
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| m (?=(?:in(?:ute)?s?)?(?:\b|\d)) |
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| h (?=(?:(?:ou)?rs?)?(?:\b|\d)) |
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| d (?=(?:ays?)?(?:\b|\d)) |
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| w (?=(?:eeks?)?(?:\b|\d)) |
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| mon (?=(?:(?:th)?s?)?(?:\b|\d)) |
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) |
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) |
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[^\d]*?(?=\b|\d) |
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# do only extract start of string |
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| (?<text> .+) |
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~uix |
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REGEX; |
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/** |
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* Turns any non-strtotime-compatible time string into a compatible one. |
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* If the passed input has trailing data, it won't be lost since within the callback the input is reassembled. |
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* However no leading data is accepted. |
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* |
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* @param string $input |
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* @return string |
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*/ |
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public function normalize(string $input): string |
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{ |
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$output = preg_replace_callback(self::$pattern, |
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function($matches) { |
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$int = $matches['int']; |
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switch ($matches['time']) { |
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case 's': |
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$t = ($int == 1) ? ' second ' : ' seconds '; |
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break; |
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case 'm': |
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$t = ($int == 1) ? ' minute ' : ' minutes '; |
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break; |
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case 'h': |
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$t = ($int == 1) ? ' hour ' : ' hours '; |
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break; |
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case 'd': |
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$t = ($int == 1) ? ' day ' : ' days '; |
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break; |
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case 'w': |
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$t = ($int == 1) ? ' week ' : ' weeks '; |
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break; |
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case 'mon': |
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$t = ($int == 1) ? ' month ' : ' months '; |
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break; |
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case 'y': |
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$t = ($int == 1) ? ' year ' : ' years '; |
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break; |
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} |
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$t = $t ?? ''; |
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# rebuild the interval string |
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$time = $int . $t; |
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if (isset($matches['text'])) { |
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$time .= trim($matches['text']); |
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} |
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return $time; |
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}, $input); |
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return trim($output); |
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} |
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} |
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