<?php
include 'common.php';




function CheckIsMaster($dbhandle, $guild_uid, $character_uid)
{
	$stmt = $dbhandle->prepare("SELECT master_uid FROM guild_info WHERE guild_uid=?");
	$stmt->bind_param("i", $guild_uid);
	$stmt->execute();
	$result = $stmt->get_result();
	if ($result)
	{
		if($row = $result->fetch_assoc())
		{
			$master_uid = $row["master_uid"];
			mysqli_stmt_free_result($stmt);

			if ($character_uid == $master_uid)
			{
				return true;
			}
			else
			{
				$return = "NOT_HAVE_PERMISSION";
				$error = "";
				$response = array('result'=>$return,'error'=>$error);
				EchoResponse($response);

				mysqli_close($dbhandle);
				exit;
			}
		}
		else
		{
			$return = "NO_EXIST_GUILD";
			$error = "";
			$response = array('result'=>$return,'error'=>$error);
			EchoResponse($response);

			mysqli_close($dbhandle);
			exit;
		}
	}
	else
	{
		$return = "DB_ERROR";
		$error = mysqli_error($dbhandle);
		$response = array('result'=>$return,'error'=>$error);
		EchoResponse($response);

		mysqli_close($dbhandle);
		exit;
	}
}
function ChangeGuildInfo($dbhandle, $guild_uid, $master_uid)
{
	$stmt = $dbhandle->prepare("UPDATE guild_info SET master_uid=? WHERE guild_uid=?");
	$stmt->bind_param("ii", $master_uid, $guild_uid);
	$result = $stmt->execute();
	$stmt->close();
	
	if($result)
	{
		return true;
	}
	else
	{
		$return = "DB_ERROR";
		$error = mysqli_error($dbhandle);
		$response = array('result'=>$return,'error'=>$error);
		EchoResponse($response);
		mysqli_close($dbhandle);
		exit;
	}
}

function ChangeGrade($dbhandle, $guild_uid, $master_uid, $character_uid, $grade)
{
	if ($grade == 0 || $grade == 1 || $grade == 2)
	{
		//grade : 0 member, 1 vice, 2 master
		$stmt = $dbhandle->prepare("UPDATE guild_member SET grade=? WHERE guild_uid=? AND character_uid=?");
		$stmt->bind_param("iii", $grade, $guild_uid, $character_uid);
		$result = $stmt->execute();
		$stmt->close();
		
		if($result)
		{
			if ($grade == 2) //다른사람에게 길드 마스터를 넘기면 기존 마스터는 길드원으로 강등된다
			{
				if (ChangeGrade($dbhandle, $guild_uid, $character_uid, $master_uid, 0))
				{
					if (ChangeGuildInfo($dbhandle, $guild_uid, $master_uid))
					{
						return true;
					}
				}
				return false;
			}
			else
			{
				return true;
			}
		}
		else
		{
			$return = "DB_ERROR";
			$error = mysqli_error($dbhandle);
			$response = array('result'=>$return,'error'=>$error);
			EchoResponse($response);
			mysqli_close($dbhandle);
			exit;
		}
	}
	else
	{
		$return = "OUT_OF_RANGE_GUILD_GRADE";
		$error = "";
		$response = array('result'=>$return,'error'=>$error);
		EchoResponse($response);
		mysqli_close($dbhandle);
		exit;
	}
}

function GradeSetting($guild_uid, $account_id, $master_uid, $character_uid, $login_key, $grade)
{
	//Connect DB
	$dbhandle = DB_Connect();
	
	
	$db_selected = mysqli_select_db($dbhandle, DB_NAME)
	or die("Could not select db");

	if(!CheckLoginKey($dbhandle, $account_id, $login_key))
	{
		PrintLoginKeyError();
		mysqli_close($dbhandle);
		return;
	}

	if (CheckIsMaster($dbhandle, $guild_uid, $master_uid))
	{
		if (ChangeGrade($dbhandle, $guild_uid, $master_uid, $character_uid, $grade))
		{
			$return = "GUILD_GRADE_SETTING_OK";
			$error = "";
			$response = array('result'=>$return,'error'=>$error);
			EchoResponse($response);
		}
	}
		
	mysqli_close($dbhandle);
}
function EchoResponse($response)
{
	$isXmlHttpRequest = (isset($_SERVER['HTTP_X_REQUESTED_WITH'])) ?
	(strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') ? true : false: false;
	($isXmlHttpRequest) ? header('Content-type: application/json') : header('Content-type: text/plain');
 
	echo json_encode($response);
}

$guild_uid = $_GET['guild_uid'];
$account_id = $_GET['account_id'];
$master_uid = $_GET['master_uid'];
$character_uid = $_GET['character_uid'];
$login_key = $_GET['login_key'];
$grade = $_GET['grade'];

if(CheckValidatedServerIP())
{
	GradeSetting($guild_uid, $account_id, $master_uid, $character_uid, $login_key, $grade);
}
else
{
	$response = "INVALIDATED_SERVER";
	$error = "CheckValidatedServerIP ERROR";
	$isXmlHttpRequest = (isset($_SERVER['HTTP_X_REQUESTED_WITH'])) ?
	(strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') ? true : false: false;
	($isXmlHttpRequest) ? header('Content-type: application/json') : header('Content-type: text/plain'); 
 
	echo json_encode(array(	'result'=>$response,'error'=>$error	));
}


?>