<?php

class operation__analysis_formatter extends ChadoFieldFormatter {

  // The default lable for this field.
  public static $default_label = 'Analysis';

  // The list of field types for which this formatter is appropriate.
  public static $field_types = ['operation__analysis'];

  /**
   * @see TripalFieldFormatter::view()
   */
  public function view(&$element, $entity_type, $entity, $langcode, $items, $display) {
    if (count($items) > 0) {
      
      $name_term = chado_get_semweb_term('analysis', 'name');
      
      $content = $items[0]['value'][$name_term];
      if (array_key_exists('entity', $items[0]['value'])) {
        list($entity_type, $entity_id) = explode(':', $items[0]['value']['entity']);
        $content = l($content, 'bio_data/' . $entity_id);
      }

      // The cardinality of this field is 1 so we don't have to
      // iterate through the items array, as there will never be more than 1.
      $element[0] = [
        '#type' => 'markup',
        '#markup' => $content,
      ];
    }
  }
}