299 lines
6.9 KiB
PHP
299 lines
6.9 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: lucas
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* Date: 15/03/18
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* Time: 15:50
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*/
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namespace api\module\department;
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use database\core\Repo;
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use error\core\Error;
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use error\core\Err;
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use database\repo\department;
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use Ifsnop\Mysqldump\Mysqldump;
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class versionController{
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/* Attributes
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---------------------------------------------------------*/
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private $backup_path;
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private $origin_dbname;
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/* (1) Initialize object
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*
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---------------------------------------------------------*/
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public function __construct(){
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$this->backup_path = null;
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$this->origin_dbname = null;
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}
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/* (2) Initializes a directory
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*
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* @db_name<String> The database name
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*
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* @return outName<outType> outDesc
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*
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--------------------------------------------------------*/
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private function initDir(string $db_name){
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/* (1) Manage 'BACKUP' root directory
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---------------------------------------------------------*/
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/* (1) If not exists -> try to create it */
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if( !is_dir(__BACKUP__) )
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mkdir(__BACKUP__);
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/* (2) Try to override permissions */
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chmod(__BACKUP__, 0775);
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/* (2) Manage sub-directory
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---------------------------------------------------------*/
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/* (1) If @db_name is 'preview_@database_hash' -> extract @database */
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if( preg_match('/^preview_(\w+)_[a-f0-9]+$/', $db_name, $m) )
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$db_name = $m[1];
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/* (2) Store @db_name as origin */
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$this->origin_dbname = $db_name;
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/* (3) Store backup path */
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$this->backup_path =__BACKUP__."/$db_name";
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/* (4) If dir. already exists -> do nothing more */
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if( is_dir($this->backup_path) )
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return;
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/* (4) Else -> try to create + set permissions */
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mkdir($this->backup_path);
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chmod($this->backup_path, 0775);
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}
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/* (3) Scan directory files
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*
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* @path<String> Directory path
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*
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* @return files<array> Array containing file names
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*
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---------------------------------------------------------*/
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private function scandir(string $path) : array {
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/* (1) Return [] if not a directory */
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if( !is_dir($path) )
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return [];
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/* (2) Scan the directory */
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$files = scandir($path);
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/* (3) Remove '.' and '..' (2 first elements) */
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$files = array_slice($files, 2);
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/* (4) Return file list */
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return $files;
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}
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/* (4) List available versions for this department
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*
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* @return versions<array> Version list
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*
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---------------------------------------------------------*/
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public function get($args){
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/* (1) Initialize directory for current database (department) */
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$this->initDir( $_SESSION['CurrentDatabase'] );
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/* (2) Strip extensions */
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$versions = array_map(
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function($e){ return pathinfo($e, PATHINFO_FILENAME); },
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$this->scandir($this->backup_path)
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);
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/* (3) Return versions */
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return ['versions' => $versions ];
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}
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/* (5) Remove an existing version for this department
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*
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* @version<String> Version name (typically snapshot date)
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*
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* @return deleted<bool> Whether the version has been deleted
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*
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---------------------------------------------------------*/
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public function delete($args){
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$version = null;
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extract($args);
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/* (1) Initialize directory for current database (department) */
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$this->initDir( $_SESSION['CurrentDatabase'] );
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/* (2) Dispatch 'unlink' result */
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return [ 'deleted' => unlink($this->backup_path."/$version.sql") ];
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}
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/* (6) Creates a new version (snapshot of database) from now
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*
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* @return created_id<String> The created version id (date)
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*
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---------------------------------------------------------*/
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public function post($args){
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/* (1) Initialize directory for current database (department) */
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$this->initDir( $_SESSION['CurrentDatabase'] );
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/* (2) Try to create the snapshot */
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try{
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/* (2.1) Get database configuration */
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$conf = Repo::getDBConfig();
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/* (2.2) Try to dump the database */
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$dump = new Mysqldump(
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'mysql:host='.$conf['host'].';dbname='.$conf['dbname'],
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$conf['username'],
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$conf['password'],
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[ "compress" => Mysqldump::GZIP ]
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);
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/* (2.3) Get current date (for naming the version) */
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$current_date = date('d-m-Y');
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/* (2.4) Store the version */
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$dump->start($this->backup_path."/$current_date.sql");
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/* (2.5) Return status */
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return ['created_id' => $current_date ];
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/* (3) On error -> dispatch error */
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}catch(\Exception $e){
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return ['error' => new Error(Err::RepoError)];
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}
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}
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/* (6) ( Switches to preview || Applies on prod ) for a version
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*
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* @apply<int> If 0 -> preview version
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* If 1 -> apply version into prod database
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* @version<String> [OPT] Version name to use (if ommited, switch back to prod database)
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*
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* @return created_id<String> The created version id (date)
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*
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---------------------------------------------------------*/
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public function put($args){
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$apply = null;
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$version = null;
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extract($args);
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/* (1) Initialisation
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---------------------------------------------------------*/
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/* (1) Initialize directory for current database (department) */
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$this->initDir( $_SESSION['CurrentDatabase'] );
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/* (2) Get department repository */
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/** @var department $dept_repo */
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$dept_repo = Repo::getRepo('department');
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/* (3) Check whether we have to [apply OR preview] */
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$apply = ( $apply === '1' );
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/* (2) If back to 'prod' database
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---------------------------------------------------------*/
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if( is_null($version) ){
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/* (1) Reset database to 'prod' */
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$_SESSION['CurrentDatabase'] = $this->origin_dbname;
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$_SESSION['VERSION'] = null;
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/* (2) Return success */
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return [ 'updated' => true ];
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}
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/* (3) Read the backup version
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---------------------------------------------------------*/
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/* (1) Start buffer */
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ob_start();
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/* (2) Read backup file */
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readgzfile($this->backup_path."/$version.sql");
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/* (3) Store & Flush buffer into variable */
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$snapshot = ob_get_clean();
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/* (4) Manage error */
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if( strlen($snapshot) === 0 )
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return ['error' => new Error(Err::RepoError)];
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/* (4) APPLY into 'prod' database
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---------------------------------------------------------*/
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if( $apply ){
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/* (1) Restore from this version */
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$restored = $dept_repo->restore($this->origin_dbname, $snapshot);
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$_SESSION['VERSION'] = null;
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/* (2) Dispatch repo execution status */
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return [ 'updated' => $restored ];
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}
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/* (5) PREVIEW version database
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---------------------------------------------------------*/
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/* (1) Try to get 'preview' database name */
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$preview_dbname = $dept_repo->previewExists($this->origin_dbname, $version);
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/* (2) If does not exist -> create it */
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if( is_null($preview_dbname) ){
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/* 1. Try to create preview */
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$preview_dbname = $dept_repo->createPreview($this->origin_dbname, $version);
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/* 2. Switch to preview */
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$dept_repo->restore($preview_dbname, $snapshot);
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}
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/* (3) Store 'preview' database in session */
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$_SESSION['CurrentDatabase'] = $preview_dbname;
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$_SESSION['VERSION'] = $version;
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/* (4) Return status */
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return [ 'updated' => true ];
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}
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} |