<?php

class data__sequence extends ChadoField {


  // --------------------------------------------------------------------------
  //                     EDITABLE STATIC CONSTANTS
  //
  // The following constants SHOULD be set for each descendent class.  They are
  // used by the static functions to provide information to Drupal about
  // the field and it's default widget and formatter.
  // --------------------------------------------------------------------------

  // The default label for this field.
  public static $default_label = 'Sequence';

  // The default description for this field.
  public static $description = 'A field for managing the primary sequence for a feature.';

  // Provide a list of instance specific settings. These can be accessed within
  // the instanceSettingsForm.  When the instanceSettingsForm is submitted
  // then Drupal will automatically change these settings for the instance.
  // It is recommended to put settings at the instance level whenever possible.
  // If you override this variable in a child class be sure to replicate the
  // term_name, term_vocab, term_accession and term_fixed keys as these are
  // required for all TripalFields.
  public static $default_instance_settings = [
    // The short name for the vocabulary (e.g. schema, SO, GO, PATO, etc.).
    'term_vocabulary' => 'data',
    // The name of the term.
    'term_name' => 'sequence',
    // The unique ID (i.e. accession) of the term.
    'term_accession' => '2044',
    // Set to TRUE if the site admin is allowed to change the term
    // type. This will create form elements when editing the field instance
    // to allow the site admin to change the term settings above.
    'term_fixed' => FALSE,
  ];

  // Indicates the download formats for this field.  The list must be the
  // name of a child class of the TripalFieldDownloader.
  public static $download_formatters = [
    'TripalTabDownloader',
    'TripalCSVDownloader',
    'TripalNucFASTADownloader',
  ];

  // The default widget for this field.
  public static $default_widget = 'data__sequence_widget';

  // The default formatter for this field.
  public static $default_formatter = 'data__sequence_formatter';


  /**
   * @see TripalField::elementInfo()
   */
  public function elementInfo() {
    $field_term = $this->getFieldTermID();
    return [
      $field_term => [
        'operations' => [],
        'sortable' => FALSE,
        'searchable' => FALSE,
        'type' => 'xs:string',
        'readonly' => FALSE,
      ],
    ];
  }

  /**
   * @see TripalField::load()
   */
  public function load($entity) {
    $field_name = $this->field['field_name'];
    $feature = $entity->chado_record;

    $feature = chado_expand_var($feature, 'field', 'feature.residues');
    $entity->{$field_name}['und'][0]['value'] = $feature->residues;
  }
}