<?php

namespace SilverStripe\Model\FieldType;

use DataList;
use DropdownField;
use DB;
use DataObject;

/**
 * A special type Int field used for primary keys.
 *
 * @todo Allow for custom limiting/filtering of scaffoldFormField dropdown
 *
 * @package framework
 * @subpackage model
 */
class DBPrimaryKey extends DBInt {
	/**
	 * @var DataObject
	 */
	protected $object;

	private static $default_search_filter_class = 'ExactMatchFilter';

	/**
	 * @var bool
	 */
	protected $autoIncrement = true;

	public function setAutoIncrement($autoIncrement) {
		$this->autoIncrement = $autoIncrement;
		return $this;
	}

	public function getAutoIncrement() {
		return $this->autoIncrement;
	}

	public function requireField() {
		$spec = DB::get_schema()->IdColumn(false, $this->getAutoIncrement());
		DB::require_field($this->getTable(), $this->getName(), $spec);
	}

	/**
	 * @param string $name
	 * @param DataOject $object The object that this is primary key for (should have a relation with $name)
	 */
	public function __construct($name, $object = null) {
		$this->object = $object;
		parent::__construct($name);
	}

	public function scaffoldFormField($title = null, $params = null) {
		return null;
	}

	public function scaffoldSearchField($title = null) {
		parent::scaffoldFormField($title);
	}

	public function setValue($value, $record = null, $markChanged = true) {
		parent::setValue($value, $record, $markChanged);

		if($record instanceof DataObject) {
			$this->object = $record;
		}
	}
}