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<?php
/**
 * @link https://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license https://www.yiiframework.com/license/
 */

namespace yii\test;

use Yii;
use yii\base\InvalidConfigException;

/**
 * FileFixtureTrait provides functionalities for loading data fixture from file.
 *
 * @author Leandro Guindani Gehlen <leandrogehlen@gmail.com>
 * @since 2.0.14
 */
trait FileFixtureTrait
{
    /**
     * @var string the directory path or [path alias](guide:concept-aliases) that contains the fixture data
     */
    public $dataDirectory;
    /**
     * @var string|bool the file path or [path alias](guide:concept-aliases) of the data file that contains the fixture data
     * to be returned by [[getData()]]. You can set this property to be false to prevent loading any data.
     */
    public $dataFile;

/**
     * Returns the fixture data.
     *
     * The default implementation will try to return the fixture data by including the external file specified by [[dataFile]].
     * The file should return the data array that will be stored in [[data]] after inserting into the database.
     *
     * @param string $file the data file path
     * @param bool $throwException whether to throw exception if fixture data file does not exist.
     * @return array the data to be put into the database
     * @throws InvalidConfigException if the specified data file does not exist.
     */
    protected function loadData($file, $throwException = true)
    {
        if ($file === null || $file === false) {
            return [];
        }

if (basename($file) === $file && $this->dataDirectory !== null) {
            $file = $this->dataDirectory . '/' . $file;
        }

$file = Yii::getAlias($file);
        if (is_file($file)) {
            return require $file;
        }

if ($throwException) {
            throw new InvalidConfigException("Fixture data file does not exist: {$file}");
        }

return [];
    }

}