<?php
/**
 * 2008 - 2017 (c) HDClic
 *
 * MODULE PrestaBlog
 *
 * @author    HDClic <prestashop@hdclic.com>
 * @copyright Copyright (c) permanent, HDClic
 * @license   Addons PrestaShop license limitation
 * @version    3.7.4
 * @link    http://www.hdclic.com
 *
 * NOTICE OF LICENSE
 *
 * Don't use this module on several shops. The license provided by PrestaShop Addons
 * for all its modules is valid only once for a single shop.
 */

class SqlParse
{
	/**
	 * @var Db
	 */
	protected $db;

	/**
	 * @var array List of keywords which will be replaced in queries
	 */
	protected $metadata = array();

	/**
	 * @var array List of errors during last parsing
	 */
	protected $errors = array();

	/**
	 * @param Db $db
	 */
	public function __construct(Db $db = null)
	{
		if (is_null($db))
			$db = Db::getInstance();
		$this->db = $db;
	}

	/**
	 * Set a list of keywords which will be replaced in queries
	 *
	 * @param array $data
	 */
	public function setMetaData(array $data)
	{
		foreach ($data as $k => $v)
			$this->metadata[$k] = $v;
	}

	/**
	 * Parse a SQL file and execute queries
	 *
	 * @param string $filename
	 * @param bool $stop_when_fail
	 */
	public function parseFile($filename, $stop_when_fail = true)
	{
		if (!file_exists($filename))
			throw new PrestashopInstallerException("File $filename not found");

		return $this->parse(Tools::file_get_contents($filename), $stop_when_fail);
	}

	/**
	 * Parse and execute a list of SQL queries
	 *
	 * @param string $content
	 * @param bool $stop_when_fail
	 */
	public function parse($content, $stop_when_fail = true)
	{
		$this->errors = array();

		$content = str_replace(array_keys($this->metadata), array_values($this->metadata), $content);
		$queries = preg_split('#;\s*[\r\n]+#', $content);
		foreach ($queries as $query)
		{
			$query = trim($query);
			if (!$query)
				continue;

			if (!$this->db->execute($query))
			{
				$this->errors[] = array(
					'errno' => $this->db->getNumberError(),
					'error' => $this->db->getMsgError(),
					'query' => $query,
				);

				if ($stop_when_fail)
					return false;
			}
		}

		return count($this->errors) ? false : true;
	}

	/**
	 * Get list of errors from last parsing
	 *
	 * @return array
	 */
	public function getErrors()
	{
		return $this->errors;
	}
}