143 lines
3.5 KiB
PHP
143 lines
3.5 KiB
PHP
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<?php
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namespace Grav\Plugin;
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class AnchorsTwigExtension extends \Twig_Extension
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{
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private $config;
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public function __construct($config)
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{
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$this->config = $config;
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}
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public function getName()
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{
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return 'AnchorsTwigExtension';
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}
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public function getFunctions()
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{
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return [
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new \Twig_SimpleFunction('anchors', [$this, 'anchorsFunction'])
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];
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}
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/**
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* Get a list of anchors link
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*
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* @param $content
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* @param $tag
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* @return string
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*/
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public function anchorsFunction($content, $tag = 'h2', $terms = null)
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{
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$configTags = array_map('trim', explode(',',$this->config));
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if (in_array($tag, $configTags)){
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$textMenu = [];
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$rx = '/<'.$tag.'>(.*)<\/'.$tag.'>/';
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preg_match_all($rx, $content, $group);
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if (!empty($group[1])){
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if (!empty($terms)){
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$termsArray = array_map('trim', explode(',',$terms));
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$elements = array_diff($group[1],$termsArray);
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}else{
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$elements = $group[1];
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}
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foreach($elements as $element){
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$textMenu[] = $element;
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}
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$html = $this->getHtmlTag($textMenu);
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}else{
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$html = '';
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}
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}else{
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$tag = current($configTags);
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$html = $this->anchorsFunction($tag, $content);
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}
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return $html;
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}
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/**
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* Mount the html of anchors link
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*
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* @param $itens
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* @return string
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*/
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private function getHtmlTag($itens)
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{
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$html = '';
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$html .= '<ul class="items-menus-page">';
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foreach($itens as $item){
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$html .= '<li><a href="#'.$this->getUrl($item).'">'.$this->textLimit($item, 50, false).'</a></li>';
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}
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$html .= '</ul>';
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return $html;
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}
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/**
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* Get url whithout special characters
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*
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* @param $text
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* @return string
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*/
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private function getUrl($text)
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{
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$rx1 = array('ä','ã','à','á','â','ê','ë','è','é','ï','ì','í','ö','õ','ò','ó','ô','ü','ù','ú','û','À','Á','Â','Ã','É','Ê','Ô','Í','Ó','Õ','Ú','ñ','Ñ','ç','Ç');
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$rx2 = '/\'/';
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$rx3 = '/[& \+\$,:;=\?@"#\{\}\|\^~\[`%!\'<>\]\.\/\(\)\*ºª]/';
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$rx4 = '/-{2,}/';
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$rx5 = '/\^-+|-+$/';
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$urlAnchor1 = str_replace('–', '-', str_replace($rx1, '', $text));
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$urlAnchor2 = preg_replace($rx2, '', $urlAnchor1);
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$urlAnchor3 = preg_replace($rx3, '-', $urlAnchor2);
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$urlAnchor4 = $this->textLimit(preg_replace($rx4, '-', $urlAnchor3), 64);
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$urlAnchor5 = preg_replace($rx5, '', $urlAnchor4);
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$urlAnchorFinal = strtolower($urlAnchor5);
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return $urlAnchorFinal;
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}
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/**
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* It limit characters total in exit
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*
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* @param $text
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* @param $limit
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* @param bool|true $url //verify if type content is url or title
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* @return string
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*/
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private function textLimit($text, $limit, $url = true)
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{
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$count = strlen($text);
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if ( $count >= $limit ) {
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if ($url){
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$text = substr($text, 0, $limit);
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return $text;
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}else {
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$text = substr($text, 0, strrpos(substr($text, 0, $limit), ' ')) . '...';
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return $text;
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}
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}
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else{
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return $text;
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}
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}
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}
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