<?php
	/**
     * fruithost | OpenSource Hosting
     *
     * @author Adrian Preuß
     * @version 1.0.0
     * @license MIT
     */

	use fruithost\Accounting\Auth;
	use fruithost\Localization\I18N;
	use fruithost\Network\Response;
	use fruithost\Templating\TemplateFiles;
	
	if(isset($_POST['action']) && $_POST['action'] === 'command') {
		if(!Auth::hasPermission('SERVER::CONSOLE')) {
			$this->assign('error', I18N::get('You have no permissions for this action!'));
			exit();
		}

		Response::addHeader('Content-Type', 'text/plain; charset=UTF-8');
		$user      = trim(shell_exec('whoami'));
		$directory = trim(shell_exec('pwd'));
		$hostname  = $_SERVER['SERVER_NAME'];
		$prefix    = sprintf("\033[38;2;200;110;110m%s\033[34m@\033[1;32m%s\033[90m:\033[39m%s\033[90m#", $user, $hostname, $directory);
		$command   = escapeshellcmd($_POST['command']);

        if(defined('DEMO') && DEMO) {
			if($command === 'motd') {
				$output = 'Welcome to the Demoversion of fruithost!';
				printf("%s\n\033[39m%s", $prefix, $output);
				exit();
			}

			$output = "\033[31mERROR:\033[39m Your command is forbidden at the demo version.";
			printf("%s %s\n\033[39m%s", $prefix, $command, $output);
			exit();
		}

		if($command === 'ColorTest') {
			$tests = [
				'styles'     => [
					0 => 'reset',
					1 => 'bold',
					2 => 'faint',
					3 => 'italic',
					4 => 'underline',
					5 => 'blink'
				],
				'foreground' => [
					30 => 'black',
					31 => 'red',
					32 => 'green',
					33 => 'yellow',
					34 => 'blue',
					35 => 'magenta',
					36 => 'cyan',
					37 => 'white',
					38 => 'multicolor',
					90 => 'bright_black',
					91 => 'bright_red',
					92 => 'bright_green',
					93 => 'bright_yellow',
					94 => 'bright_blue',
					95 => 'bright_magenta',
					96 => 'bright_cyan',
					97 => 'bright_white'
				],
				'background' => [
					40  => 'black',
					41  => 'red',
					42  => 'green',
					43  => 'yellow',
					44  => 'blue',
					45  => 'magenta',
					46  => 'cyan',
					47  => 'white',
					48  => 'multicolor',
					100 => 'bright_black',
					101 => 'bright_red',
					102 => 'bright_green',
					103 => 'bright_yellow',
					104 => 'bright_blue',
					105 => 'bright_magenta',
					106 => 'bright_cyan',
					107 => 'bright_white',
				]
			];

			foreach($tests as $name => $values) {
				printf("--- %s\n", $name);
				foreach($values as $code => $color) {
					printf("\033[%sm%s\n", $code, $color);
				}
				print "\n";
			}
			exit();
		}

		setlocale(LC_ALL, I18N::set().'.UTF-8');
		putenv('LC_ALL='.I18N::set().'.UTF-8');
		
		if($command === 'motd' && !file_exists('/etc/motd')) {
			$command = '';
		}
		
		$build = [
			'export MAN_KEEP_FORMATTING=1;',
			'export SHELL=/bin/bash;',
			sprintf('export LANG=%s.UTF-8;', I18N::set()),
			'export TERM=xterm-256color;',
			'export _=/usr/bin/env;',
			'export USER=fruithost;',
			'export HOME="'.PATH.'";',
			#'/bin/bash -c "',
			($command === 'motd' ? 'cat /etc/motd' : $command),
			#'"',
			' 2>&1'
		];

		// @ToDo try to fork it to /dev/ttys000, /dev/pts/0 or other for coloring output?
		// Or using SSH? https://www.php.net/manual/en/function.ssh2-connect
		$process = proc_open(implode('', $build), [
			[
				'pipe',
				'r'
			],
			// stdin
			[
				'pipe',
				'w'
			],
			// stdout
			[
				'pipe',
				'w'
			]
			// stderr
		], $pipes);

		if($command === 'motd') {
			$command = '';
		}

		if(is_resource($process)) {
			$stdin  = $pipes[0];
			$stdout = $pipes[1];
			$stderr = $pipes[2];
			fclose($stdin);
			stream_set_blocking($stdout, false);
			stream_set_blocking($stderr, false);
			$outEof = false;
			$errEof = false;
			$result = '';
			$error  = '';

			if(!posix_isatty($stdout)) {
				#$result = "NOT TTY : " . posix_ttyname($stdout);
			}

			do {
				$read   = [
					$stdout,
					$stderr
				];
				$write  = null;
				$except = null;
				stream_select($read, $write, $except, 1, 0);
				$outEof = $outEof || feof($stdout);
				$errEof = $errEof || feof($stderr);
				if(!$outEof) {
					$result .= fgets($stdout);
				}
				if(!$errEof) {
					$error .= fgets($stderr);
				}
			} while(!$outEof || !$errEof);

			fclose($stdout);
			fclose($stderr);
			proc_close($process);

			if($result == "\x1B[H\x1B[2J\x1B[3J") {
				print $result;
			} else {
				if($result === null) {
					$result = '-bash: '.$command.': command not found';
				} else if($result === false) {
					$result = '-bash: piped error';
				}
				printf("%s \033[39m %s\n%s", $prefix, $command, $result);
			}
		}
		exit();
	}

	$template->getFiles()->addJavascript('terminal', $this->url('js/terminal.js'), '1.0.0', [ 'ajax' ], TemplateFiles::FOOTER);
	$template->getFiles()->addJavascript('console', $this->url('js/console.js'), '1.0.0', [ 'terminal' ], TemplateFiles::FOOTER);
?>