<?php 
/*CAUTION .... any move could break the whole thing, no exception handeling provided, dbad*/
/*This whole file was inspired by eligant dump by phpmyadmin */
/*Here is how the whole thing implemented*/
/*followed export interface with its input to export.php in phpmyadmin */
/*next, tried to imitate only the conserned stuff*/
/* added the needed functions in the process from libraries to the class */

/**
* PhpMyAdmin stuff
*/

/*DO NOT MODIFY ORDER MATTERS*/

class PMA_stuff 
{
	function __construct($tables=array(),$db='test',$username = 'root',$password = '')
	{
		$_POST['table_select'] = $_POST['table_structure'] = $_POST['table_data'] = $tables;
		$_POST['db']=$db;
		$_POST['username'] = $username;
		$_POST['password'] = $password;
		$this->init_input();
	}

	private function init_input()
	{
		$pma_post = ["export_type" => "database", "export_method"=> "quick", "quick_or_custom"=> "quick", "what"=> "sql", "structure_or_data_forced"=> "0", "output_format"=> "sendit", "filename_template" =>"@DATABASE@", "charset"=> "utf-8","compression"=> "none", "codegen_structure_or_data"=> "data", "codegen_format"=> "0", "sql_include_comments"=> "something", "sql_compatibility"=> "NONE", "sql_structure_or_data"=> "structure_and_data", "sql_create_table"=> "something", "sql_auto_increment"=> "something", "sql_create_view"=> "something", "sql_procedure_function"=> "something", "sql_create_trigger"=> "something", "sql_backquotes"=> "something", "sql_type"=> "INSERT", "sql_insert_syntax"=> "both", "sql_max_query_size"=> "50000", "sql_hex_for_binary"=> "something", "sql_utc_time"=> "something"];

		$_POST = array_merge($_POST,$pma_post);

	}

	public function export()
	{
		//revise phpmyadmin/export.php, this mha_export is a revised version of it.
		include 'mha_export.php';
		global $dump_buffer;
		return $dump_buffer;
	}
}

class PhpMAExport {
	var $PMA = null;
	public function __construct($tables,$db,$username ,$password )
	{
		$this->PMA = new PMA_stuff($tables,$db,$username ,$password);
	}

	private function optimize($dump_string){
		/*\-\-.*\n  ''*/
		/*\n\n  \n*/
		///**/ ''
		//$dump_string = preg_replace("~\n--.*\n~", "", $dump_string);
		$statements = explode(";\n", $dump_string);
		$res['create'] = [];
		$res['data'] =[];
		$res['alter'] = [];
		foreach ($statements as  $sql ) {
			//$sql = preg_replace("~\n~", "", $sql);
// 			if( strpos($sql,'\n') ===0 || strpos($sql,'--') ===0 ){
// 			    continue;
// 			}
// 			else
			if(strpos($sql,'INSERT') !== FALSE){
				$res['data'][] = $sql;
			}elseif(strpos($sql,'CREATE') !== FALSE ){
				/*CREATE TABLE */
				//extract table name
				$pos1 = strpos($sql, '`');
                $pos2 = strpos($sql, '`', $pos1 + 1);
                if(strpos($sql,'Database:')){
                    $pos1 = strpos($sql, '`',$pos2 + 1);
                    $pos2 = strpos($sql, '`', $pos1+1);
                }
				//$res['create'][] = 'DROP TABLE IF EXISTS ' . substr($sql, 13,strpos($sql,'(')-13).'; ' ;
				$res['create'][] = 'DROP TABLE IF EXISTS ' . substr($sql, $pos1,$pos2-$pos1).'`; ' ;
				$res['create'][] = $sql;
			}elseif(strpos($sql, 'ALTER') !== FALSE){
				$res['alter'][] = $sql;
			}
		}
		return $res;
	}
	function export(){

		$dump_buffer = $this->PMA->export();
		return $this->optimize($dump_buffer);
	}
}