<?php
    define('DB_HOST','mysql1.mediaproject.de');
    define('DB_USER','c30_sds_api');
    define('DB_PASS','sBF77apxdcpfwJcAk28o');
    define('DB_DATABASE','c30_sds_api');

    $DB=new PDO('mysql:host='.DB_HOST.';dbname='.DB_DATABASE.';chatset=utf-8',DB_USER,DB_PASS);
    $DB->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
	$DB->query('SET NAMES \'utf8\'');
	
	function db_select($table, $data, $where=[], $order=[], $join=[], $debug=false)
	{
		global $DB;
		$STH = "";
		
		if(gettype($data)=='string') $data = array($data);
		$data = '`'.implode('`,`', $data).'`';
		$data = str_replace('`*`','*', $data);
		
		if(!empty($where) && is_array($where))
		{
			$cond = [];
			foreach($where as $key=>$value) { $cond[] = "`$key`='$value'"; }
			$where = implode(' AND ', $cond);
			$where = str_replace('=\'!', '!=\'',$where);
			$where = str_replace('AND `|', 'OR `', $where);
			$where = preg_replace('#=\s*[\'\"]([<>=]+)(.*?)[\'\"]#', '$1 \'$2\'', $where);
		}
		
		if(!empty($order) && is_array($order))
		{
			// format: ['field1'=>'direction','field2'=>'direction'...] OR ['field1', 'field2'...]
			$cond = [];
			foreach($order as $field=>$direction) {
				if(is_numeric($field)) {
					$field = $direction;
					$direction='ASC';
				}
				$cond[] = $field.' '.$direction;
			}
			$order = implode(',',$cond);
		}
		
		if(!empty($join) && is_array($join))
		{
			// format: ['table1'=>['field-of-source','field-of-table1'], 'table2'=>['field-of-source','field-of-table2']]
			$cond = [];
			foreach($join as $key=>$value)
			{
				if(is_array($value) && count($value)==2)
				{
					$cond[] = str_replace('~', $key, ' JOIN '.$key.' ON '.$table.'.'.implode(' = ~.',$value));
				}
			}
			$join = implode('',$cond);
		}
		
		$data = preg_replace('#`([^`]+?)\.([^`]+?)`#', '$1.`$2`', $data);
		$data = preg_replace('#`(.+?) as (.*?)`#i','`$1` AS `$2`', $data);
		$data = preg_replace('#`([a-z0-9]+\(.*?\))`#i', '$1', $data);
		$where = preg_replace('#`([^`]+?)\.([^`]+?)`#', '$1.`$2`', $where);
		$order = preg_replace('#`([^`]+?)\.([^`]+?)`#', '$1.`$2`', $order);
		$join = preg_replace('#`([^`]+?)\.([^`]+?)`#', '$1.`$2`', $join);

		if(empty($where)) $where = '';
		if(empty($order)) $order = '';
		if(empty($join)) $join = '';
		
		$sql = 'SELECT '.$data.' FROM '.$table.$join.(!empty($where) ? ' WHERE '.$where : '').(!empty($order) ? ' ORDER BY '.$order : '');
//exit($sql);

		try{
			$STH = $DB->prepare($sql);
			$STH->execute();
			$retVal = $STH->fetchAll(PDO::FETCH_ASSOC);
			
			if($debug===true)
			{
				$dump = print_r($STH, true).": ".print_r($retVal, true);
				print($dump.'<br>');
				file_put_contents("query_debug.txt", $dump."\r\n", FILE_APPEND);
			}
			
			return $retVal;
		}
		catch(PDOException $err)
		{
			print_r($STH); print('<br/>');
			print_r($err);
			die();
		}
	}
	
	function getOptions($data, $debug=false)
	{
		global $DB;
		$STH = "";
		$sql = 'SELECT * FROM options WHERE name IN (\''.implode('\',\'',$data).'\');';
		
		try {
			$STH = $DB->prepare($sql);
			$STH->execute($data);
			if($debug===true)
			{
				$dump = print_r($STH);
				print($dump); print('<br>');
				file_put_contents("query_debug.txt", $dump."\r\n", FILE_APPEND);
			}
			return $STH->fetchAll(PDO::FETCH_ASSOC);
		} catch(Exception $err) {
			print_r($STH); print('<br/>');
			print_r($err);
		}
	}