<?php
/**
 * @link http://craftcms.com/
 * @copyright Copyright (c) Pixel & Tonic, Inc.
 * @license http://craftcms.com/license
 */

namespace craft\behaviors;

use yii\base\Behavior;

/**
 * Custom field behavior
 *
 * This class provides attributes for all the unique custom field handles.
 *
{METHOD_DOCS}
 */
class CustomFieldBehavior extends Behavior
{
    /**
     * @var bool Whether the behavior should provide methods based on the field handles.
     */
    public $hasMethods = false;

    /**
     * @var bool Whether properties on the class should be settable directly.
     */
    public $canSetProperties = true;

    /**
     * @var string[] List of supported field handles.
     */
    public static $fieldHandles = [
/* HANDLES */
    ];

/* PROPERTIES */

    /**
     * @var array Additional custom field values we don’t know about yet.
     */
    private $_customFieldValues = [];

    /**
     * @inheritdoc
     */
    public function __call($name, $params)
    {
        if ($this->hasMethods && isset(self::$fieldHandles[$name]) && count($params) === 1) {
            $this->$name = $params[0];
            return $this->owner;
        }
        return parent::__call($name, $params);
    }

    /**
     * @inheritdoc
     */
    public function hasMethod($name)
    {
        if ($this->hasMethods && isset(self::$fieldHandles[$name])) {
            return true;
        }
        return parent::hasMethod($name);
    }

    /**
     * @inheritdoc
     */
    public function __isset($name)
    {
        if (isset(self::$fieldHandles[$name])) {
            return true;
        }
        return parent::__isset($name);
    }

    /**
     * @inheritdoc
     */
    public function __get($name)
    {
        if (isset(self::$fieldHandles[$name])) {
            return $this->_customFieldValues[$name] ?? null;
        }
        return parent::__get($name);
    }

    /**
     * @inheritdoc
     */
    public function __set($name, $value)
    {
        if (isset(self::$fieldHandles[$name])) {
            $this->_customFieldValues[$name] = $value;
            return;
        }
        parent::__set($name, $value);
    }

    /**
     * @inheritdoc
     */
    public function canGetProperty($name, $checkVars = true)
    {
        if ($checkVars && isset(self::$fieldHandles[$name])) {
            return true;
        }
        return parent::canGetProperty($name, $checkVars);
    }

    /**
     * @inheritdoc
     */
    public function canSetProperty($name, $checkVars = true)
    {
        if (!$this->canSetProperties) {
            return false;
        }
        if ($checkVars && isset(self::$fieldHandles[$name])) {
            return true;
        }
        return parent::canSetProperty($name, $checkVars);
    }
}