soselo/base.php

<?php
require 'config/application.php';

$session = null;
if (isset($_SERVER['REQUEST_URI'])) {
	if (!isset($_COOKIE['_session']) || !file_exists('/tmp/apcontrol-sessions')) {
		if (substr($_SERVER['REQUEST_URI'],0,5) === '/api/') {
			http_response_code(403); die('<h3>403, API Forbidden</h3>');
		}
		header('Location: login.php'); die;
	}
	$session = trim($_COOKIE['_session']);
	$ps_sess = explode('.', $session);
	$sessions = explode("\n", trim(file_get_contents('/tmp/apcontrol-sessions')));
	if (!in_array($session, $sessions) || !isset($GLOBALS['appconf']['users'][$ps_sess[0]])) {
		if (substr($_SERVER['REQUEST_URI'],0,5) === '/api/') {
			http_response_code(403); die('<h3>403, API Forbidden</h3>');
		}
		header('Location: login.php'); die;
	}
	unset($sessions);
	unset($ps_sess);
}

function __session_delete($user) {
	if (!file_exists('/tmp/apcontrol-sessions'))
		return false;
	$newsessions = [];
	$sessions = explode("\n", trim(file_get_contents('/tmp/apcontrol-sessions')));
	foreach ($sessions as $session) {
		$ps = explode('.', $session);
		if ($ps[0] !== $user)
			$newsessions []= $session;
	}
	file_put_contents('/tmp/apcontrol-sessions', implode("\n", $newsessions));
	return true;
}

if (!file_exists($GLOBALS['appconf']['data_dir']))
	mkdir($GLOBALS['appconf']['data_dir']);


// global variables
$GLOBALS['_cache'] = [];
$GLOBALS['supported_ap_software'] = [
	'mastodon',
];

// functions
function apiresult($data, $code=200) {
	if (isset($GLOBALS['IS_PHP']) && $GLOBALS['IS_PHP']) {
		$GLOBALS['api_data'] = $data;
		return false;
	}
	if (isset($_SERVER['REQUEST_URI'])) {
		if ($code !== 200) http_response_code($code);
		header('Content-Type: application/json');
	}

	if (isset($GLOBALS['http_cache_config'])
		&& gettype($data) !== 'string'
		&& !isset($data['error'])
		&& !isset($data['ok']))
		content_cache__put($GLOBALS['http_cache_config']['key'],
			'ondemand,'.$GLOBALS['http_cache_config']['seconds'], $data);

	if (gettype($data) !== 'string')
		echo json_encode($data);
	else echo $data;
	die;
}

function no_http() {
	if (isset($_SERVER['REQUEST_URI']))
		die('<h3>Forbidden, this method can only be called from shell</h3>');
}

function mod_php($module_name=null) {
	$null_mod = false;
	if ($module_name === null) {
		$null_mod = true;
		$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3);
		$fl = preg_replace('#^'.__DIR__.'#', '', $trace[0]['file']);
		$fl = trim($fl, '/');
		$module_name = substr($fl, 0, strrpos($fl,'/'));
	}

	$is_php_set = isset($GLOBALS['IS_PHP']) && $GLOBALS['IS_PHP'];
	if (!$null_mod) {
		$GLOBALS['IS_PHP'] = true;
		unset($GLOBALS['api_data']);
	}
	if (!file_exists($module_name.'/mod.php'))
		return 'does_not_exist';
	require $module_name.'/mod.php';
	if (!$null_mod) {
		if (!$is_php_set)
			unset($GLOBALS['IS_PHP']);
		return $GLOBALS['api_data'];
	}
}

function filedb_exists($ns, $file=''){ return file_exists(filedb_getdir($ns,$file)); }
function filedb_getdir($ns, $file='') {
	$dir = $GLOBALS['appconf']['data_dir'];
	$ns = trim($ns, '/');
	$dir = realpath($dir.'/'.$ns);
	if (strpos($dir, $GLOBALS['appconf']['data_dir']) === false)
		return false;
	return $dir.'/'.$file;
}

function filedb_put($ns, $file='', $content=null) {
	$dir = $GLOBALS['appconf']['data_dir'];
	$ns = trim($ns, '/');
	foreach (explode('/', $ns) as $d) {
		$dir .= '/'.$d;
		if (!file_exists($dir))
			mkdir($dir);
	}
	$dir = realpath($dir);
	if (strpos($dir, $GLOBALS['appconf']['data_dir']) === false)
		return false;
	if ($file === '')
		return true;
	$content_file = $dir.'/'.$file;
	if ($content === null)
		return touch($content_file);
	return file_put_contents($content_file, $content);
}

function filedb_del($ns, $file='') {
	$file = filedb_getdir($ns, $file);
	if ($file === false || !file_exists($file))
		return false;
	if (is_dir($file))
		return rmdir($file);
	return unlink($file);
}

function filedb_delall($ns) {
	if (!filedb_exists($ns))
		return false;
	foreach (scandir(filedb_getdir($ns)) as $fil) {
		if (in_array($fil, ['.','..']))
			continue;
		filedb_del($ns, $fil);
	}
	return true;
}

function filedb_get($ns, $file) {
	$file = filedb_getdir($ns, $file);
	if ($file === false)
		return false;
	if (!file_exists($file))
		return null;
	return file_get_contents($file);
}

function instance_config($software=null, $instance=null) {
	if ($software === null) {
		foreach ($GLOBALS['supported_ap_software'] as $sf) {
			$result = instance_config($sf);
			if ($result !== null)
				return $result;
		}
		return null;
	}
	if (!in_array($software, $GLOBALS['supported_ap_software']))
		return null;

	if ($instance === null && isset($_GET['instance']))
		$instance = trim($_GET['instance']);

	if ($instance === null)
		return apiresult(['error' => '<instance> GET argument must be provided'], 400);

	$GLOBALS['ap_instance'] = $instance;
	$GLOBALS['ap_software'] = $software;
	if (isset($GLOBALS['_cache'][$software.$instance]))
		return $GLOBALS['_cache'][$software.$instance];

	mod_php('api/v1/config/get');
	if (!isset($GLOBALS['api_data']))
		return null;


	$found = false;
	foreach ($GLOBALS['api_data']['hosts'][$software] as $ins_cfg) {
		if ($ins_cfg['instance'] === $instance) {
			$found = $ins_cfg;
		}
	}
	if ($found === false)
		return null;

	$config = [];
	$config_raw = explode("\n", trim($found['config']));
	foreach ($config_raw as $ln) {
		$k = substr($ln, 0, strpos($ln,'='));
		$v = substr($ln, strpos($ln,'=')+1);
		$config[$k] = $v;
	}

	$GLOBALS['_cache'][$software.$instance] = $config;
	return $config;
}

function instance_config_require($software, $instance=null) {
	$config = instance_config($software, $instance);
	if ($config === null)
		apiresult(['error' => 'instance parameter is incorrect. Does not exist'], 400);
	return $config;
}

function instance_http_get($url) { return instance_http_request($url, 'GET'); }
function instance_http_post($url, $data=null) { return instance_http_request($url, 'POST', $data); }
function instance_http_delete($url) { return instance_http_request($url, 'DELETE'); }
function instance_http_request($url, $method, $data=null) {
	$software = null;
	if (isset($_SERVER['REQUEST_URI'])) {
		$huri = substr(trim($_SERVER['REQUEST_URI']), 7);
		$ps = explode('/', trim($huri, '/'));
		if ($ps[0] !== 'http' || !in_array($ps[1], $GLOBALS['supported_ap_software']))
			return apiresult(['error' => 'this method can only be called from api/v1/http/<software> URIs'], 500);
		$software = $ps[1];
	}

	if ($software === null && isset($GLOBALS['ap_software']))
		$software = $GLOBALS['ap_software'];

	$config = instance_config($software);
	$url = $config['instance_url'].$url;

	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	if ($method === 'POST' || $method === 'DELETE') {
		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
		if ($data !== null)
			curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
	}
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

	if (isset($config['api_authkey'])) {
		curl_setopt($ch, CURLOPT_HTTPHEADER, [
			'Authorization: Bearer '.$config['api_authkey'],
		]);
	}

	$output = curl_exec($ch);
	curl_close($ch);
	return $output;
}

function valid_mastodon_account_id($id) {
	return preg_match('/^\d+$/', strval($id));
}

function valid_for_path($str) {
	return strpos($str, '/') === false;
}

function valid_uuid($str) {
	return preg_match('/^[a-z0-9\-]+$/', trim($str));
}

// source: https://stackoverflow.com/questions/1755144/how-to-validate-domain-name-in-php
function valid_domain_name($domain_name)
{
	return (preg_match("/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i", $domain_name)
		&& preg_match("/^.{1,253}$/", $domain_name)
		&& preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $domain_name));
}

function remove_accents($string) {
	if ( !preg_match('/[\x80-\xff]/', $string) )
		return $string;

	$chars = array(
	// Decompositions for Latin-1 Supplement
	chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',
	chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',
	chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',
	chr(195).chr(135) => 'C', chr(195).chr(136) => 'E',
	chr(195).chr(137) => 'E', chr(195).chr(138) => 'E',
	chr(195).chr(139) => 'E', chr(195).chr(140) => 'I',
	chr(195).chr(141) => 'I', chr(195).chr(142) => 'I',
	chr(195).chr(143) => 'I', chr(195).chr(145) => 'N',
	chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',
	chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',
	chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',
	chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',
	chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',
	chr(195).chr(159) => 's', chr(195).chr(160) => 'a',
	chr(195).chr(161) => 'a', chr(195).chr(162) => 'a',
	chr(195).chr(163) => 'a', chr(195).chr(164) => 'a',
	chr(195).chr(165) => 'a', chr(195).chr(167) => 'c',
	chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',
	chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',
	chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',
	chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',
	chr(195).chr(177) => 'n', chr(195).chr(178) => 'o',
	chr(195).chr(179) => 'o', chr(195).chr(180) => 'o',
	chr(195).chr(181) => 'o', chr(195).chr(182) => 'o',
	chr(195).chr(182) => 'o', chr(195).chr(185) => 'u',
	chr(195).chr(186) => 'u', chr(195).chr(187) => 'u',
	chr(195).chr(188) => 'u', chr(195).chr(189) => 'y',
	chr(195).chr(191) => 'y',
	// Decompositions for Latin Extended-A
	chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',
	chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',
	chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',
	chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',
	chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',
	chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',
	chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',
	chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',
	chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',
	chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',
	chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',
	chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',
	chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',
	chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',
	chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',
	chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',
	chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',
	chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',
	chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',
	chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',
	chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',
	chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',
	chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',
	chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',
	chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',
	chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',
	chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',
	chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',
	chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',
	chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',
	chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',
	chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',
	chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',
	chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',
	chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',
	chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',
	chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',
	chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',
	chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',
	chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',
	chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',
	chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',
	chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',
	chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',
	chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',
	chr(197).chr(154) => 'S',chr(197).chr(155) => 's',
	chr(197).chr(156) => 'S',chr(197).chr(157) => 's',
	chr(197).chr(158) => 'S',chr(197).chr(159) => 's',
	chr(197).chr(160) => 'S', chr(197).chr(161) => 's',
	chr(197).chr(162) => 'T', chr(197).chr(163) => 't',
	chr(197).chr(164) => 'T', chr(197).chr(165) => 't',
	chr(197).chr(166) => 'T', chr(197).chr(167) => 't',
	chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',
	chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',
	chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',
	chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',
	chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',
	chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',
	chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',
	chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',
	chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',
	chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',
	chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',
	chr(197).chr(190) => 'z', chr(197).chr(191) => 's'
	);

	$string = strtr($string, $chars);

	return $string;
}

if (!function_exists('str_starts_with')) {
	function str_starts_with($haystack, $needle) {
		return (string)$needle !== '' && strncmp($haystack, $needle, strlen($needle)) === 0;
	}
}

function set_chat_at($str, $i, $c) {
	return substr($str, 0, $i).$c.substr($str, $i+1);
}

function normalize_word_sound($word, $cback=null) {
	$hashes = [
		'4:a', '3:e', '1:i', '0:o',
		'5:s', 'b:v', '8:b', 'k:c',
		'y:i', 'que:kee', 'q:k',
	];
	foreach ($hashes as $hash) {
		$hash = explode(':', $hash);
		if ($cback !== null)
			$word = $cback($word, $hash);
		else $word = str_replace($hash[0], $hash[1], $word);
	}
	return $word;
}

function normalize_for_search($str) {
	if (trim($str) === '') return '';
	$str = trim(strip_tags(str_replace('>', '> ', $str)));
	$str = strtolower(remove_accents($str));
	$str = preg_replace('/[^a-z0-9]+/', ' ', $str);
	$str = preg_replace('/\s+/', ' ', $str);
	$words = explode(' ', trim($str));
	$newwords = [];
	foreach ($words as $word) {
		if (trim($word) === '')
			continue;
		$word = normalize_word_sound($word);
		$nword = '';
		if (strlen($word) <= 3) {
			$newwords [] = $word;
			continue;
		}
		for ($i = 0; $i < strlen($word); $i++) {
			if ($i === 0) {
				$nword .= $word[0];
				continue;
			}
			if ($word[$i] !== $word[$i-1]) {
				$nword .= $word[$i];
			}
		}
		$newwords [] = $nword;
	}
	return trim(implode(' ', $newwords));
}

function parse_comparing_expression($expr) {
	$expr = preg_replace('/\n/', ' ', $expr);
	$expr = preg_replace('/\s+/', ' ', $expr);
	$p_expr = $expr;
	$quot = false;
	for ($i = 0; $i < strlen($p_expr); $i++) {
		if ($p_expr[$i] === '"') {
			$quot = !$quot;
			continue;
		}
		if ($quot) {
			if ($p_expr[$i] === '(')
				$p_expr = set_chat_at($p_expr, $i, 'º');
			else if ($p_expr[$i] === ')')
				$p_expr = set_chat_at($p_expr, $i, 'ª');
		}
	}
	$p_expr = preg_replace('/\(|\)/', ' ', $p_expr);
	$p_expr = preg_replace('/\s+/', ' ', $p_expr);
	$p_expr = preg_split('/OR|AND(\sNOT)?/', $p_expr);
	$p_expr = str_replace('º', '(', $p_expr);
	$p_expr = str_replace('ª', ')', $p_expr);
	foreach ($p_expr as &$e) $e = trim($e);
	return [
		'original' => $expr,
		'parsed' => $p_expr,
	];
}

function matches_comparing_expression($expr, $text, $debug=false) {
	if (gettype($expr) === 'string')
		$expr = parse_comparing_expression($expr);
	$result = $expr['original'];
	if ($debug) {
		echo '<h2>Original</h2>';
		echo '<pre>'.$text.'</pre>';
	}
	$text = normalize_for_search($text);
	if ($debug) {
		echo '<h2>Normalized</h2>';
		echo '<pre>'.$text.'</pre>';
		echo '<br><br>';
	}
	$text_words = explode(' ', $text);
	foreach ($expr['parsed'] as $t)
	{
		$bool = false;
		$t = trim($t);
		$selector = substr($t, 0, strpos($t, ' '));
		$content = substr($t, strpos($t, ' ')+1);
		$content = trim(trim(trim($content), '"'));
		switch ($selector)
		{
			case 'words':
			case 'hasall':
				$ws = explode(' ', $content);
				$hasall = true;
				foreach ($ws as $w) {
					if (!in_array(normalize_for_search($w), $text_words)) {
						$hasall = false;
						break;
					}
				}
				$bool = $hasall;
				if ($debug) {
					echo '<br><br>';
					echo '<h3>words</h3>';
					echo '<pre>';
					echo $content;
					echo '</pre>';
					echo '<br>Result: ';
					var_dump($bool);
					echo '<br>';
				}
				break;

			case 'anyword':
			case 'hasany':
				$ws = explode(' ', $content);
				$hasany = false;
				foreach ($ws as $w) {
					if (in_array(normalize_for_search($w), $text_words)) {
						$hasany = true;
						break;
					}
				}
				$bool = $hasany;
				if ($debug) {
					echo '<br><br>';
					echo '<h3>hasany</h3>';
					echo '<pre>';
					echo $content;
					echo '</pre>';
					echo '<br>Result: ';
					var_dump($bool);
					echo '<br>';
				}
				break;

			case 'has':
			case 'includes':
			case 'contains':
				$a = str_replace(' ', '', $text);
				$b = str_replace(' ', '', normalize_for_search($content));
				if ($debug) {
					echo '<br><br>';
					echo '<h3>contains</h3>';
					echo '<pre>';
					echo $content;
					echo '</pre>';
				}
				$bool = strpos($a, $b) !== false;
				if ($debug) {
					echo '<br>Result: ';
					var_dump($bool);
					echo '<br>';
				}
				unset($a); unset($b);
				break;

			case 'regex':
			case 'matches':
				if (strlen($content) <= 0)
					continue 2;
				$content = normalize_word_sound($content, function($w, $h) {
					if ($h[0] === 'b')
						return preg_replace('/([^\\\])b/', '\1'.$h[1], $w);
					if (preg_match('/^\d$/', $h[0])) {
						$b = false;
						for ($i = 0; $i < strlen($w); $i++) {
							if (in_array($w[$i], ['{','}','[',']'])) {
								$b = !$b;
								continue;
							}
							if (!$b && $w[$i] === $h[0])
								$w = set_chat_at($w, $i, $h[1]);
						}
						return $w;
					}
					return str_replace($h[0], $h[1], $w);
				});
				preg_match_all('/\w{4,}/', $content, $mts);
				foreach ((isset($mts[0]) ? $mts[0] : []) as $m)
					$content = preg_replace('/\b'.$m.'\b/', normalize_for_search($m), $content);
				if ($content[0] != '^')
					$content = '^.*'.$content;
				if ($content[strlen($content)-1] != '$')
					$content .= '.*$';
				if ($debug) {
					echo '<br><br>';
					echo '<h3>regex</h3>';
					echo '<pre>';
					echo $content;
					echo '</pre>';
				}
				$bool = preg_match('#'.$content.'#', $text) === 1;
				if ($debug) {
					echo '<br>Result: ';
					var_dump($bool);
					echo '<br>';
				}
				break;

		}
		$result = str_replace($t, $bool ? 'true' : 'false', $result);
	}
	$result = str_replace('OR', '||', $result);
	$result = str_replace('AND', '&&', $result);
	$result = str_replace('NOT ', '!', $result);
	$result = str_replace('NOT', '!', $result);
	try {
		if ($debug) {
			echo '<br><hr>';
			echo '<h3>Final result</h3>';
			echo '<br>eval: ';
			var_dump($result);
		}
		eval('$result = '.$result.';');
		if ($debug) {
			echo '<br>';
			echo '<br>result: ';
			var_dump($result);
			die;
		}
	} catch (\Throwable $e) {
		return apiresult(['error' => 'Query contains errors, please correct it and try again.']);
	}
	return in_array($result, [0,false]) ? false : true;
}

function http_cache($seconds, $data=null) {
	if ($data === null)
		$data = $_GET;
	$cache_key = sha1('http_cache'.json_encode($data));
	$cache = content_cache__get($cache_key);
	if ($cache !== null)
		return apiresult($cache);
	$GLOBALS['http_cache_config'] = [
		'seconds' => $seconds,
		'key' => $cache_key
	];
}

function _cachekey_construct(...$keys) {
	$nkeys = [];
	foreach ($keys as $key)
		$nkeys []= _cachekey($key);
	return implode(',', $nkeys);
}

function _cachekey($str) {
	return preg_replace('/[^a-z0-9\_]+/', '', strtolower($str));
}

function content_cache__exists($key) {
	$cache_dir = $GLOBALS['appconf']['data_dir'].'/cache';
	if (!file_exists($cache_dir)) {
		mkdir($cache_dir);
		return false;
	}
	$key = md5($key);
	$cache_file = null;
	foreach (scandir($cache_dir) as $fil) {
		if (strpos($fil, $key) !== false) {
			$cache_file = $cache_dir.'/'.$fil;
			$ps = explode(',',$fil);
			array_splice($ps, 0, 1);
			if ($ps[0] !== 'always' && count($ps) > 1)
				$ps[1] = intval($ps[1]);
			return (object)[
				'file' => $cache_file,
				'config' => $ps
			];
		}
	}
	return false;
}

function content_cache__get($key) {
	$cfg = content_cache__exists($key);
	if ($cfg === false)
		return null;
	$ms = time() - filemtime($cfg->file);
	if ($cfg->config[0] === 'ondemand' &&
		$ms > $cfg->config[1]) {
		unlink($cfg->file);
		return null;
	}
	return unserialize(file_get_contents($cfg->file));
}

function content_cache__put($key, $config, $data) {
	$cache_dir = $GLOBALS['appconf']['data_dir'].'/cache';
	if (!file_exists($cache_dir))
		mkdir($cache_dir);
	$ps = explode(',', trim($config));
	$cache_file = $cache_dir.'/'.md5($key);
	if ($ps[0] === 'always')
		$cache_file .= ','.$ps[0];
	else if ($ps[0] === 'ondemand')
		$cache_file .= ','.$config;
	return file_put_contents($cache_file, serialize($data));
}

function cronjob_db_create__check_cachecfg($software, $instance, $sql, $cache=null) {
	if ($cache === null)
		return false;
	$ps = explode(',',trim($cache));
	if ($ps[0] !== 'always')
		return false;
	return cronjob_db_create($software, $instance, $sql, intval($ps[1]));
}

function cronjob_db_create($software, $instance, $sql, $time=3600) {
	$job_key = md5($software.$instance.$sql);
	$dir_crons = $GLOBALS['appconf']['data_dir'].'/cron';
	if (!file_exists($dir_crons))
		mkdir($dir_crons);
	$dir_crons_db = $dir_crons.'/db';
	if (!file_exists($dir_crons_db))
		mkdir($dir_crons_db);
	$cron_file = $software.','.$instance.','.$job_key;
	$result_file = $dir_crons_db.'/'.$cron_file.','.$time;
	$touch_1970 = !file_exists($result_file);
	foreach (scandir($dir_crons_db) as $fl) {
		if (strpos($fl, $cron_file) !== false)
			unlink($dir_crons_db.'/'.$fl);
	}
	file_put_contents($result_file, $sql);
	if ($touch_1970) touch($result_file, 1000);
	return $cron_file;
}

// classes
require 'classes/PgDatabase.php';
require 'classes/RedisDatabase.php';