adding a more complete image link kirbytext tag by extending the functionalities (requires the thumbs plugin to work)

kirbytext.extended.php

    function __construct($text, $markdown=true) {
      
      parent::__construct($text, $markdown);
      
      // define custom tags
      $this->addTags('imglink');
      $this->addAttributes('legend', 'crop', 'quality', 'rel', 'class', 'size');
                      
    }  
     
    // input tag shoule be :
    // (imglink: image.jpg size: big class: two columns rel: whatever legend: look at my image)
    //
      
    function imglink($params) {
      $img = $params['imglink'];
       
      // define default values for attributes
      $defaults = array(
        'size'    => '1',     // size ratio of the thumbnail, 1 = small, 2 = med, 3 = big, 4 = original
        'class'     => '',    // no class by default
        'rel'     => '',      // rel is used for the lightbox gallery linking or whatever
        'legend'     => '',   // I could use the image's own description…
        'text'     => $img,   // this is the image's name (with extension)
        'crop'     => false,  // for the thumbnail generation through $thumb
        'quality'  => 90      // see above
      );
        
      // is this the magic that'll allow me to conjure up the current page?
      global $site;  
      $page = ($this->obj) ? $this->obj : $site->pages()->active();
        
      // merge the given parameters with the default values
      $options = array_merge($defaults, $params);
    
      $currentImage =  $page->images()->find($img);
    
      // size options generate a pixel size
      switch ($options['size']) {
      case '1':
      case 'small':
        $pixel_size =  '240';
        break;
      case '2':
      case 'med':
        $pixel_size =  '480';
        break;
      case '3':
      case 'big':
        $pixel_size =  '720';
        break;
      case '4':
      case 'original':
      default:
        $pixel_size =  '960';
        break;
      }
    
      $line = '<a href="' . $currentImage->url() . '" class="lightbox_reactive '. $options['class'] . '" rel="'. $options['rel'] . '" title="'. $options['legend'] .'">';
      $line .= '<img src="';
      $line .= thumb($currentImage, array( 
                                          'width'   => $pixel_size, 
                                          'crop'   => $options['crop'], 
                                          'quality' => $options['quality']
                                       ), false);
      $line .= '" class="scale-with-grid" alt="'. $options['legend'] .'" />';
      if ($options['legend'] != '') {
        $line .= '<span class="legend">' . $options['legend'] . '</span>';
      }
      $line .= '</a>';
      // build the link tag  
      return $line;    
    }