ConsecutivePunctuationCharacterTrait.php

<?php
/*
 * citeproc-php
 *
 * @link        http://github.com/seboettg/citeproc-php for the source repository
 * @copyright   Copyright (c) 2017 Sebastian Böttger.
 * @license     https://opensource.org/licenses/MIT
 */
 
namespace Seboettg\CiteProc\Styles;
 
trait ConsecutivePunctuationCharacterTrait
{
 
    private $childrenPrefixes = [];
 
    private $childrenSuffixes = [];
 
    private $childrenDelimiter = [];
 
    public function removeConsecutivePunctuation($punctuationSign, $subject)
    {
        if (empty($punctuationSign) || preg_match("/^\s+$/", $punctuationSign)) {
            return $subject;
        }
        $pattern = '/'.preg_quote(trim($punctuationSign)).'{2,}/';
        if (preg_match($pattern, $subject)) {
            return preg_replace($pattern, $punctuationSign, $subject);
        }
        return $subject;
    }
 
    protected function getChildsAffixesAndDelimiter($child)
    {
        if (method_exists($child, "renderPrefix")) {
            if (!empty($child->renderPrefix()) && !in_array($child->renderPrefix(), $this->childrenPrefixes)) {
                $this->childrenPrefixes[] = $child->renderPrefix();
            }
        }
        if (method_exists($child, "renderSuffix")) {
            if (!empty($child->renderSuffix()) && !in_array($child->renderSuffix(), $this->childrenSuffixes)) {
                $this->childrenSuffixes[] = $child->renderSuffix();
            }
        }
        if (method_exists($child, "getDelimiter")) {
            if (!empty($child->getDelimiter()) && !in_array($child->getDelimiter(), $this->childrenDelimiter)) {
                $this->childrenDelimiter[] = $child->getDelimiter();
            }
        }
    }
 
    protected function removeConsecutiveChars($string)
    {
        foreach ($this->childrenPrefixes as $prefix) {
            $string = $this->removeConsecutivePunctuation($prefix, $string);
        }
        foreach ($this->childrenSuffixes as $suffix) {
            $string = $this->removeConsecutivePunctuation($suffix, $string);
        }
        foreach ($this->childrenDelimiter as $delimiter) {
            $string = $this->removeConsecutivePunctuation($delimiter, $string);
        }
 
        $string = preg_replace("/\s{2,}/", " ", $string);
 
        return $string;
    }
}