<?php

class PAS_Servers {

	private $baseDir;
	private $updateInterval;
	public $serverList;


	public function __construct( $baseDir, $updateInterval = 3600 ) {
		$this->baseDir = rtrim( $baseDir, DIRECTORY_SEPARATOR );
		$this->updateInterval = $updateInterval;
		$this->load_server_list();
	}


	public function get_by_name( $name ) {
		return $this->serverList[ $name ] ?? FALSE;
	}


	public function load_server_list( $forceUpdate = FALSE, $url = NULL ){
		$url = $url ?? 'https://info.partcp.org/serverlist';
		$localCacheFile = $this->baseDir . DIRECTORY_SEPARATOR . 'serverlist.yaml';
		if ( $forceUpdate || ! file_exists( $localCacheFile )
			|| time() - filemtime( $localCacheFile ) > $this->updateInterval
		){
			$data = file_get_contents( $url );
			if ( $data ){
				$data = yaml_parse( $data );
				if ( ! empty( $data['Server-List'] ) ){
					$keys = array_column( $data['Server-List'], 'name' );
					$this->serverList = array_combine( $keys, $data['Server-List'] );
					if ( ! is_dir( $this->baseDir ) ){
						mkdir( $this->baseDir, 0755, TRUE );
					}
					file_put_contents( $localCacheFile, yaml_emit( $this->serverList ) );
					return TRUE;
				}
			}
		}
		$data = file_get_contents( $localCacheFile );
		if ( ! $data ){
			return FALSE;
		}
		$this->serverList = yaml_parse( $data );
		return TRUE;
	}


	public function get_list() {
		$list = ParTCP_Key_Storage_Fs::list_pubkeys();
		$result = [];
		foreach ( $list as $name ){
			$shortCode = $this->serverList[ $name ]['short_code'] ?? '';
			$server = new ParTCP_Public_Identity( $name );
			$result[] = [ 'name' => $name, 'pubkey' => $server->pubKey,
				'short_code'=> $shortCode ];
		}
		return $result;
	}


	public function create( $name, $pubKey ) {
		return ParTCP_Key_Storage_Fs::store_pubkey( $name, $pubKey );
	}


	public function update( $name, $pubKey ) {
		return ParTCP_Key_Storage_Fs::store_pubkey( $name, $pubKey );
	}

}


// end of file pas_servers.class.php