<?php

class PAS_Access_Tokens {

	private $baseDir;


	public function __construct( $baseDir ) {
		$this->baseDir = $baseDir;
	}


	public function create( $server, $identity, $objClass, $objId ) {
		do {
			$token = bin2hex( random_bytes(16) );
			$path = "{$this->baseDir}/tokens/access/{$token}";
		}
		while ( file_exists( $path ) );
		$content = yaml_emit([
			'server' => $server,
			'identity' => $identity,
			'object_class' => $objClass,
			'object_id' => $objId,
		]);
		$dir = dirname( $path );
		if ( ! is_dir( $dir ) ){
			mkdir( $dir, 0750, TRUE );
		}
		if ( ! file_put_contents( $path, $content ) ){
			return FALSE;
		}
		$path = "{$this->baseDir}/tokens/access/objects/{$server}/{$objClass}/{$objId}";
		$dir = dirname( $path );
		if ( ! is_dir( $dir ) ){
			mkdir( $dir, 0750, TRUE );
		}
		file_put_contents( $path, $token );
		return $token;
	}


	public function find( $server, $objClass, $objId ) {
		$path = "{$this->baseDir}/tokens/access/objects/{$server}/{$objClass}/{$objId}";
		if ( ! file_exists( $path ) ){
			return FALSE;
		}
		return trim( file_get_contents( $path ) );
	}


	public function get( $token ) {
		if ( ! $token ){
			return FALSE;
		}
		$path = "{$this->baseDir}/tokens/access/{$token}";
		if ( ! file_exists( $path ) ){
			return FALSE;
		}
		return yaml_parse( file_get_contents( $path ) );
	}

}


// end of file pas_access_tokens.class.php