<?php
/*
	* @files
	* Theme Template Funtions
*/

use Drupal\Core\Template\Attribute;


/* implements template_preprocess_views_view_unformatted() */

function popsu_preprocess_views_view_unformatted(&$variables) {

  $view = $variables['view'];  
  if($view->id() == "programmes"){
    $rows = $variables['rows'];
        foreach ($rows as $id => $row) {
            $variables['rows'][$id]['attributes'] = new Attribute();
            $c = $variables['rows'][$id]['content']["#row"]->nid;
            $variables['rows'][$id]['attributes']->addClass("programme-".$c);
        }
  }

};

/* implements template_preprocess_region() */

function popsu_preprocess_region(&$variables) {

  if (isset($variables['region'])) {
    $variables['attributes']['class'][] = $variables['region'].'_container'; 
  }

}


/**
 * Implements hook_preprocess_page().
 */

function popsu_preprocess_views_view(&$variables){
  $vars = $variables;
  if(isset($variables['css_class']) &&  $variables['css_class'] == 'last-news'){

    $rows =& $variables['rows'];
    foreach ($rows as $i => &$row ){
      foreach ($row['#rows'] as $j => &$elem) {
        $entity = $elem["#row"]->_entity;
        if ($entity->hasField('field_programme')) {
          $prog_id = $entity->get('field_programme')->getString();
          $class = "programme-".$prog_id;
          $attributes = array(
            "class" => $class
          );
        }

        // $elem['id'] = new Attribute("socks");
        //$elem['attributes']->addClass($class);
      }
    }
  }
  
}

function popsu_preprocess_views_view_grid(&$variables){
  // we pass all variables by reference
  // https://www.php.net/manual/en/language.references.php
  $items =& $variables['items'];

  // loop through grid items (row and cols) not through views\rows
  foreach ($items as $r => &$row) {
    foreach ($row['content'] as $c => &$col) {

      // get the entity
      $entity = $col['content']["#row"]->_entity;

      // build generique classe
      $classes = array(
        $entity->getEntityTypeId(),
        $entity->getEntityTypeId().'-'.$entity->bundle(),
        $entity->getEntityTypeId().'-'.$entity->bundle().'-'.$entity->id(),
      );

      // if field_programme exists, add a class
      if ($entity->hasField('field_programme')) {
        $prog_id = $entity->get('field_programme')->getString();
        $classes[] = "programme-".$prog_id;
      }

      // add the classes to the column
      // Drupal\Core\Template\Attribute 
      // https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Template%21Attribute.php/class/Attribute/8.2.x
      $col['attributes']->addClass($classes);
    }
  }
}

function popsu_preprocess_views_view_field(&$variables){
  // check if link to entoty option is true
  $settings = isset($variables['field']->options['settings']) ? $variables['field']->options['settings'] : false; 
  if ($settings && isset($settings['link_to_entity']) && $settings['link_to_entity']) {
    // get the entity and build the classes
    $entity = $variables['row']->_entity;

    // build new classes
    $new_classes = array(
      $entity->getEntityTypeId(),
      $entity->getEntityTypeId().'-'.$entity->bundle(),
      $entity->getEntityTypeId().'-'.$entity->bundle().'-'.$entity->id(),
    );
    

    // get the entity link and url
    $link = $entity->toLink(); 
    $url = $entity->toLink()->getUrl();

    // set the active_class option to the url
    $url->setOption('set_active_class', true);

    // add new classes to the url (without overwriting existing once)
    $options = $url->getOptions();
    if(isset($options['attributes']) && $attributes = $options['attributes']){
      if(isset($attributes['class']) && $classes = $attributes['class']){
        $attributes['class'] +=  $new_classes;
      }else{
        $attributes['class'] = $new_classes;
      }
    }else{
      $attributes = array(
        "class" => $new_classes
      );
    }
    $url->setOption('attributes', $attributes);

    // update the url of the link
    $link->setUrl($url);

    // overwrite the output
    $variables['output'] = $link->toRenderable();
  } 
}