<?php

class chado_feature__residues extends TripalField {

  /**
   * Implements hook_info() for fields.
   *
   * This is a hook provided by the tripal_chado module for offloading the
   * hook_field_info() hook for each field to specify.
   */
  function field_info() {
    return array(
      'label' => t('Residues'),
      'description' => t('A field for managing nucleotide and protein residues.'),
      'default_widget' => 'chado_feature__residues_widget',
      'default_formatter' => 'chado_feature__residues_formatter',
      'settings' => array(),
      'instance_settings' => array('text_processing' => 1, 'display_summary' => 0),
      'storage' => array(
        'type' => 'field_chado_storage',
        'module' => 'tripal_chado',
        'active' => TRUE
      ),
    );
  }
  /**
   * Implements hook_attach_info().
   *
   * This is a hook provided by the tripal_Chado module. It allows the field
   * to specify which bundles it will attach to and to specify thee settings.
   *
   * @param $entity_type
   * @param $entity
   * @param $term
   *
   * @return
   *   A field array
   */
  function attach_info($entity_type, $bundle, $settings) {
    $field_info = array();

    $table_name = $settings['data_table'];
    $type_table = $settings['type_table'];
    $type_field = $settings['field'];
    $cv_id      = $settings['cv_id'];
    $cvterm_id  = $settings['cvterm_id'];


    // If  this is not the feature table then we don't want to attach.
    if ($table_name != 'feature') {
      return $field_info;
    }

    $field_info = array(
      'field_name' => 'feature__residues',
      'field_type' => 'chado_feature__residues',
      'widget_type' => 'chado_feature__residues_widget',
      'description' => 'An IUPAC compatible residues for this feature.',
      'label' => 'Residues',
      'is_required' => 0,
      'storage' => 'field_chado_storage',
      'widget_settings' => array(
        'display_label' => 1
      ),
      'field_settings' => array(
        'chado_table' => $table_name,
        'chado_column' => 'residues',
        'semantic_web' => array(
          'name' => '',
          'accession' => '',
          'ns' => '',
          'nsurl' => '',
        ),
      ),
    );
    return $field_info;
  }
  /**
   * Implements hook_widget_info.
   *
   * This is a hook provided by the tripal_chado module for offloading
   * the hook_field_widget_info() hook for each field to specify.
   */
  function widget_info() {
    return array(
      'label' => t('Residues'),
      'field types' => array('chado_feature__residues'),
    );
  }
  /**
   * Implements hook_formatter_info.
   *
   * This is a hook provided by the tripal_chado module for
   * offloading the hook_field_formatter_info() for each field
   * to specify.
   *
   */
  function formatter_info() {
    return array(
      'label' => t('Residues'),
      'field types' => array('chado_feature__residues'),
    );
  }
  /**
   *
   * @param unknown $entity_type
   * @param unknown $entity
   * @param unknown $field
   * @param unknown $instance
   * @param unknown $langcode
   * @param unknown $items
   * @param unknown $display
   */
  function formatter_view(&$element, $entity_type, $entity, $field,
    $instance, $langcode, $items, $display) {

    foreach ($items as $delta => $item) {
      $residues = key_exists('value', $item) ? $item['value'] : '';
      $content = '<pre class="residues-formatter">' . $residues . '</pre>';
      $element[$delta] = array(
        // We create a render array to produce the desired markup,
        '#type' => 'markup',
        '#markup' => $content,
      );
    }
  }

  /**
   *
   * @param unknown $field_name
   * @param unknown $widget
   * @param unknown $form
   * @param unknown $form_state
   * @param unknown $field
   * @param unknown $instance
   * @param unknown $langcode
   * @param unknown $items
   * @param unknown $delta
   * @param unknown $element
   */
  function widget_form(&$widget, $form, $form_state, $field, $instance, $langcode, $items, $delta, $element) {

    $widget['value'] = array(
      '#type' => 'textarea',
      '#title' => $element['#title'],
      '#description' => $element['#description'],
      '#weight' => isset($element['#weight']) ? $element['#weight'] : 0,
      '#default_value' => count($items) > 0 ? $items[0]['value'] : '',
      '#delta' => $delta,
      '#element_validate' => array('chado_feature__residues_widget_validate'),
      '#cols' => 30,
    );
  }

}

/**
 * Callback function for validating the chado_feature__residues_widget.
 */
function chado_feature__residues_widget_validate($element, &$form_state) {
  $field_name = $element['#parents'][0];

  // Remove any white spaces.
  $residues = tripal_chado_get_field_form_values($field_name, $form_state);
  if ($residues) {
    $residues = preg_replace('/\s/', '', $residues);
    tripal_chado_set_field_form_values($field_name, $form_state, $residues);
  }
}