<?php
/**
 * Created by PhpStorm.
 * User: lucas
 * Date: 15/03/18
 * Time: 15:50
 */

namespace api\module\department;


use database\core\Repo;
use database\repo\department;
use Ifsnop\Mysqldump\Mysqldump;

class saveController
{

	private $backupPath = "";
	private $originDBName = "";

	private function initDir(string $dbName){

		//match preview_DATABASENAME_sha1 in order to determine if we init the directory or not
		$matches = [];
		$reg = preg_match("/preview_(\w*)_\w*/",$dbName,$matches);

		//if the dbname match we store the original database name
		if($reg == 1){
			$dbName = $matches[1];
		}

		$this->originDBName = $dbName;

		if(!is_dir(__BACKUP__."/$dbName/")){
			mkdir(__BACKUP__."/$dbName/");
		}

		$this->backupPath =__BACKUP__."/$dbName/";
	}

	private function scandir(string $path) : array {
		//scan the directory
		$arr = scandir($path);

		//strip the useless "." and ".."
		unset($arr[0],$arr[1]);

		//make the arry start at 0 again
		$arr = array_values($arr);

		return $arr;
	}

	public function get($args){
		$this->initDir($_SESSION["CurrentDatabase"]);

		//strip extensions
		$backupNames = array_map(function($e){
			return pathinfo($e, PATHINFO_FILENAME);
		}, $this->scandir($this->backupPath));

		return ["data" => $backupNames];
	}

	public function delete($args){
		$this->initDir($_SESSION["CurrentDatabase"]);

		$backupName = "";

		extract($args);

		return ["success" => unlink($this->backupPath.$backupName.".sql")];
	}

	public function post($args){
		$this->initDir($_SESSION["CurrentDatabase"]);

		$backupName = "";
		$apply = false;
		extract($args);

		//if the backup name is empty we create it
		if($backupName == ""){
			try {
				$conf = Repo::getDBConfig();

				$dump = new Mysqldump("mysql:host={$conf["host"]};dbname={$conf["dbname"]}", $conf["username"], $conf["password"],
					[
						"compress" => Mysqldump::GZIP
					]);

				$date = date("Y-W-d");

				$dump->start($this->backupPath.$date.".sql");

				return ["success" => true,"backupName" => $date];

			} catch (\Exception $e) {
				return ["success" => false];
			}
		}else{
			//read the backup
			ob_start();
			readgzfile($this->backupPath.$backupName.".sql");
			$sql = ob_get_clean();

			/** @var department $depRepo */
			$depRepo = Repo::getRepo("department");

			if($sql == "") return ["success" => false];

			if($apply){

				$depRepo->restore($this->originDBName,$sql);

				return ["success" => true];
			}else{

				if($backupName == "origin"){
					$_SESSION['CurrentDatabase'] = $this->originDBName;
					return ["success" => true];
				}

				$previewDBName = $depRepo->previewExists($this->originDBName,$backupName);

				if($previewDBName == null){
					$previewDBName = $depRepo->createPreview($this->originDBName,$backupName);
					$depRepo->restore($previewDBName,$sql);
				}

				$_SESSION['CurrentDatabase'] = $previewDBName;
			}

			return ["success" => true, "currentDatabase" => $_SESSION['CurrentDatabase']];

		}
	}

}