<?php
/* Copyright (C) NAVER <http://www.navercorp.com> */

/**
 * File containing the QueryParser class
 */

/**
 * Parses an XML Object and returns a string used for generating the PHP cache file <br />
 * The XML Object structure must be the one defined in the XmlParser class
 *
 * @author Corina Udrescu (corina.udrescu@arnia.ro)
 * @package classes\xml\xmlquery
 * @version 0.1
 */
class QueryParser
{

	/**
	 * Property containing the associated QueryTag object
	 *
	 * @var QueryTag object
	 */
	var $queryTag;

	/**
	 * Constructor
	 *
	 * @param object $query XML object obtained after reading the XML Query file
	 * @param bool $isSubQuery
	 * @return void
	 */
	function QueryParser($query = NULL, $isSubQuery = FALSE)
	{
		if($query)
		{
			$this->queryTag = new QueryTag($query, $isSubQuery);
		}
	}

	/**
	 * Returns table information
	 *
	 * Used for finding column type info (string/numeric) <br />
	 * Obtains the table info from XE's XML schema files
	 *
	 * @param object $query_id
	 * @param bool $table_name
	 * @return array
	 */
	function getTableInfo($query_id, $table_name)
	{
		$column_type = array();
		$module = '';

		$id_args = explode('.', $query_id);
		if(count($id_args) == 2)
		{
			$target = 'modules';
			$module = $id_args[0];
			$id = $id_args[1];
		}
		else if(count($id_args) == 3)
		{
			$target = $id_args[0];
			$targetList = array('modules' => 1, 'addons' => 1, 'widgets' => 1);
			if(!isset($targetList[$target]))
			{
				return;
			}
			$module = $id_args[1];
			$id = $id_args[2];
		}

		// get column properties from the table
		$table_file = sprintf('%s%s/%s/schemas/%s.xml', _XE_PATH_, 'modules', $module, $table_name);
		if(!file_exists($table_file))
		{
			$searched_list = FileHandler::readDir(_XE_PATH_ . 'modules');
			$searched_count = count($searched_list);
			for($i = 0; $i < $searched_count; $i++)
			{
				$table_file = sprintf('%s%s/%s/schemas/%s.xml', _XE_PATH_, 'modules', $searched_list[$i], $table_name);
				if(file_exists($table_file))
				{
					break;
				}
			}
		}

		if(file_exists($table_file))
		{
			$table_xml = FileHandler::readFile($table_file);
			$xml_parser = new XmlParser();
			$table_obj = $xml_parser->parse($table_xml);
			if($table_obj->table)
			{
				if(isset($table_obj->table->column) && !is_array($table_obj->table->column))
				{
					$table_obj->table->column = array($table_obj->table->column);
				}

				foreach($table_obj->table->column as $k => $v)
				{
					$column_type[$v->attrs->name] = $v->attrs->type;
				}
			}
		}

		return $column_type;
	}

	/**
	 * Returns the contents for the query cache file
	 *
	 * @return string
	 */
	function toString()
	{
		return "<?php if(!defined('__XE__')) exit();\n"
				. $this->queryTag->toString()
				. 'return $query; ?>';
	}

}
/* End of file QueryParser.class.php */
/* Location: ./classes/xml/xmlquery/QueryParser.class.php */
