myopenhab.org status grabber

myopenhab_conf.php

<?php 
return [
    "username"  => "MYUSERNAME",
    "password"  => "MYPASSWORD",
];

myopenhab_onlinestate.php

#!/bin/env php
<?php

/**
 * @global array  $options array with script options
 * needed struck like 
 * <?php
 * [
 * 	'username' => 'USERNAME', 
 * 	'password' => 'PASSWORD',
 * 	'cookie' => 'COOKIE.TXT'
 * ]
 */
$options = getopt(null, ['username:', 'password:', 'cookie::', 'conf::', 'h', 'help', 'ignore-ssl']);

if(count(array_intersect(['h', 'help'], array_keys($options))) > 0) {
	printf('Usage: %2$s %3$s --username "MyUsername" --password "MyPassword" (--cookie "/file/to/cookie") %1$sOptions:%1$22s--username The username of myopenhab account%1$s--password The password of myopenhab account%1$s--cookie (optional) The path to cookie file', PHP_EOL, PHP_BINARY, __FILE__);	
	exit(0);
}
//convert php default behavior given parameter is explicitly false, to true if specified
$options['ignore-ssl'] = (bool) (array_key_exists('ignore-ssl', $options) ? !$options['ignore-ssl'] : false);

if( array_key_exists('conf', $options) ) {
	if(!file_exists($options['conf']) ){
		printf('Conf file "%2$s" not found!%1$s', PHP_EOL, $options['conf'] );	
		exit(1);
	}
	$conf_file_content = @include($options['conf']);
	if(!is_array($conf_file_content)){
		printf("Conf file has wrong format!%1\$sWrite as follow:%1\$s%1\$s<?php%1\$sreturn ['username' => 'MyUsername',  'password' => 'MyPassword'];%1\$s%1\$s", PHP_EOL);	
		exit(1);
	}
	$options = array_merge($conf_file_content, $options);
}

//is not set on comandline or config file use default value
$options['cookie'] = array_key_exists('cookie', $options) ? $options['cookie'] : "COOKIE.TXT";

//only for debuging
//print_r($options);

if( !array_key_exists('username', $options ) || !array_key_exists('password', $options ) ) {
	printf('Username and password neded using: %s %s --username "MyUsername" --password "MyPassword"' .PHP_EOL, PHP_BINARY, __FILE__);	
	exit(1);
}

$timezone = (new DateTime())->getTimezone()->getName();

const headers = [
	'Connection: keep-alive',
	'Cache-Control: max-age=0',
	'sec-ch-ua: "Chromium";v="92", " Not A;Brand";v="99", "Microsoft Edge";v="92"',
	'sec-ch-ua-mobile: ?0',
	'Upgrade-Insecure-Requests: 1',
	'Origin: https://myopenhab.org',
	'User-Agent: Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36',
	'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
	'Sec-Fetch-Site: same-origin',
	'Sec-Fetch-Mode: navigate',
	'Sec-Fetch-User: ?1',
	'Sec-Fetch-Dest: document',
	'Accept-Language: en;q=0.9,en-GB;q=0.8,en-US;q=0.7'
];

//check for runtime
if(extension_loaded('curl') === false) 
	die("extention curl is needed ");
if(extension_loaded('dom') === false) 
	die("extention dom is needed ");

function bakingCurl($url, array $headers = null) {
	global $options;
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_COOKIEFILE, $options['cookie']);
	curl_setopt($ch, CURLOPT_COOKIEJAR, $options['cookie']);
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers ?: headers);
	if($options['ignore-ssl'] === true) {
		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
	}
	
	return $ch;
}

function execCurl($ch) {
	$result = curl_exec($ch);
	$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

	if ($result === false || $http_code != 200) {
		$error = curl_error($ch);
		curl_close($ch);
		throw new Exception($error ?: 'HTTP Error: '. $http_code );
	}

	return $result;
}
	
function startpage() {
	$result = execCurl(bakingCurl("https://myopenhab.org/"));
	return $result;
}
/**
 * Login into myopenhab.org 
 * @param string 	$csrf 	the from page extracted csrf
 * @global string	$options options like username, password or cookie
 */
function login($csrf) {
	global $options;
	//send the form
	$ch = bakingCurl('https://myopenhab.org/login', headers + [
		'Origin: https://myopenhab.org',
		'Content-Type: application/x-www-form-urlencoded',
		'Referer: https://myopenhab.org/',
	]);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLINFO_HEADER_OUT, true);
	curl_setopt($ch, CURLOPT_POST, true);
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
	$qu = http_build_query( [
		'username'=>$options['username'],
		'password'=>$options['password'],
		'_csrf' => $csrf,
		'submit'=>'',
	]);
	curl_setopt($ch, CURLOPT_POSTFIELDS, $qu);
	
	return execCurl($ch);
}

function getCsrf(\DomXPath $domxpath){
	/* xpath of csrf input element in login form*/
	$csrf_nodes = $domxpath->query("//form[@action='/login']/input[@name='_csrf']/@value");

	if($csrf_nodes->count() == 1){
		return $csrf_nodes[0]->value;
	}
	return false;

	/*
	$csrf_nodes = $domxpath->query('/html/body/div/section/div/div/div[2]/div[2]/form/input[1]');
	// Traverse the DOMNodeList object to output each DomNode's nodeValue 
	foreach ($csrf_nodes as  $node) {
		if ($node->hasAttributes()) {
			foreach ($node->attributes as $attr) {
			  if('value' == $attr->nodeName){
				  return $attr->nodeValue;
			  }
			}
		  }
	}
	*/
}

function getStateFromPage($document) {
	global $timezone;
	if(preg_match('/(Unknown user)|(incorrect password)/i', $document)) {
		throw new Exception("Wrong username or incorrect password");
	}
	$dom = new DomDocument();
	/* Load the HTML */
	@$dom->loadHTML($document);
	/* Create a new XPath object */
	$xpath = new DomXPath($dom);

	$csrf = getCsrf($xpath);

	//no csrf allredy logged in :-)
	if($csrf == false) {
		//using  li[3] becaus class change on online/offline :-/
		$status_nodes = $xpath->query('//*[@id="mainMenu"]/ul/li[3]/a');
		if(count($status_nodes) == 0){
			throw new Exception("Document structure not valid. Status not found!");
		}
		foreach ($status_nodes as $i => $node) {
			$output['status'] = strtolower($node->textContent) ;
			if ($node->hasAttributes()) {
				foreach ($node->attributes as $attr) {
					if('title' == $attr->nodeName){ //@todo not working correkt :-(
						$output['since_hint'] = $attr->nodeValue;
						$sinceDateTime =  new DateTimeImmutable(str_replace('Since ', '', $output['since_hint']),  new DateTimeZone($timezone));
						$output['state_since_seconds'] = (int) (new DateTime())->getTimestamp() - $sinceDateTime->getTimestamp();
						$output['state_since_datetime'] = $sinceDateTime->format('Y-m-d H:i:s');
					}
				}
			  }
		}
		$output['timezone'] = $timezone;
		return $output;
	} else {
		
		execCurl( //set timezone for "since... " Value
			bakingCurl( 'https://myopenhab.org/setTimezone?' . http_build_query(['tz' => $timezone]) )
		);
		
		//rerunn from login
		return getStateFromPage(login($csrf));
	}
	throw new Exception("Document structure not valid");
}

try {
	$document=startpage();
	$state = getStateFromPage($document);
	echo json_encode($state);
} catch (\Throwable $th) { 
	die( json_encode( ['error' => $th->getMessage()] ) );
}