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<?php |
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/* |
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* citeproc-php |
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* |
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* @link http://github.com/seboettg/citeproc-php for the source repository |
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* @copyright Copyright (c) 2016 Sebastian Böttger. |
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* @license https://opensource.org/licenses/MIT |
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*/ |
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namespace Seboettg\CiteProc\Constraint; |
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use NumberFormatter; |
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use Seboettg\CiteProc\CiteProc; |
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use Seboettg\CiteProc\Util\NumberHelper; |
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/** |
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* Class IsNumeric |
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* @package Seboettg\CiteProc\Choose\Constraint |
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* |
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* @author Sebastian Böttger <[email protected]> |
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*/ |
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class IsNumeric implements ConstraintInterface |
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{ |
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private $isNumeric; |
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public function __construct($value) |
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{ |
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$this->isNumeric = $value; |
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} |
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/** |
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* @param $value |
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* @param int|null $citationNumber |
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* @return bool |
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*/ |
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public function validate($value, $citationNumber = null) |
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{ |
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if (isset($value->{$this->isNumeric})) { |
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return $this->parseValue($value->{$this->isNumeric}); |
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} |
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return false; |
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} |
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/** |
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* Tests whether the given variables (Appendix IV - Variables) contain numeric content. Content is considered |
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* numeric if it solely consists of numbers. Numbers may have prefixes and suffixes (“D2”, “2b”, “L2d”), and may be |
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* separated by a comma, hyphen, or ampersand, with or without spaces (“2, 3”, “2-4”, “2 & 4”). For example, “2nd” |
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* tests “true” whereas “second” and “2nd edition” test “false”. |
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* |
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* @param $evalValue |
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* @return bool |
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*/ |
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private function parseValue($evalValue) |
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{ |
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if (is_numeric($evalValue)) { |
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return true; |
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} else if (preg_match(NumberHelper::PATTERN_ORDINAL, $evalValue)) { |
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$numberFormatter = new NumberFormatter(CiteProc::getContext()->getLocale()->getLanguage(), NumberFormatter::ORDINAL); |
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return $numberFormatter->parse($evalValue) !== false; |
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} else if (preg_match(NumberHelper::PATTERN_ROMAN, $evalValue)) { |
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return NumberHelper::roman2Dec($evalValue) !== false; |
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} else if (preg_match(NumberHelper::PATTERN_COMMA_AMPERSAND_RANGE, $evalValue)) { |
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return true; |
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} |
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return false; |
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} |
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} |
seboettg /
citeproc-php
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