509 lines
15 KiB
PHP
509 lines
15 KiB
PHP
<?php
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/**
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* Holds various utility functions.
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*
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* @package Sakura
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*/
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namespace Sakura;
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use PHPMailer;
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/**
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* Meta utility functions.
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*
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* @package Sakura
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* @author Julian van de Groep <me@flash.moe>
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*/
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class Utils
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{
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/**
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* Verify a ReCaptcha
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*
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* @param string $response The user response.
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*
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* @return array The response from the ReCaptcha API.
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*/
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public static function verifyCaptcha($response)
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{
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// Attempt to get the response
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$resp = @file_get_contents(
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'https://www.google.com/recaptcha/api/siteverify?secret='
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. Config::get('recaptcha_private')
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. '&response='
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. $response
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);
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// In the highly unlikely case that it failed to get anything forge a false
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if (!$resp) {
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return false;
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}
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// Decode the response JSON from the servers
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$resp = json_decode($resp, true);
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// Return shit
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return $resp;
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}
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/**
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* The error handler.
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*
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* @param int $errno The error ID.
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* @param string $errstr Quick description of the event.
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* @param string $errfile File the error occurred in.
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* @param int $errline Line the error occurred on.
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*/
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public static function errorHandler($errno, $errstr, $errfile, $errline)
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{
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// Remove ROOT path from the error string and file location
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$errstr = str_replace(ROOT, '', $errstr);
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$errfile = str_replace(ROOT, '', $errfile);
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// Attempt to log the error to the database
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if (Database::$database !== null) {
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// Encode backtrace data
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$backtrace = base64_encode(json_encode(debug_backtrace()));
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// Check if this error has already been logged in the past
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if ($past = Database::fetch(
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'error_log',
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false,
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[
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'error_backtrace' => [$backtrace, '=', true],
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'error_string' => [$errstr, '='],
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'error_line' => [$errline, '='],
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]
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)) {
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// If so assign the errid
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$errid = $past['error_id'];
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} else {
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// Create an error ID
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$errid = substr(md5(microtime()), rand(0, 22), 10);
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// Log the error
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Database::insert('error_log', [
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'error_id' => $errid,
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'error_timestamp' => date("r"),
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'error_revision' => SAKURA_VERSION,
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'error_type' => $errno,
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'error_line' => $errline,
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'error_string' => $errstr,
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'error_file' => $errfile,
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'error_backtrace' => $backtrace,
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]);
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}
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}
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switch ($errno) {
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case E_ERROR:
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case E_USER_ERROR:
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$error = '<b>FATAL ERROR</b>: ' . $errstr . ' on line ' . $errline . ' in ' . $errfile;
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break;
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case E_WARNING:
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case E_USER_WARNING:
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$error = '<b>WARNING</b>: ' . $errstr . ' on line ' . $errline . ' in ' . $errfile;
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break;
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case E_NOTICE:
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case E_USER_NOTICE:
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$error = '<b>NOTICE</b>: ' . $errstr . ' on line ' . $errline . ' in ' . $errfile;
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break;
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default:
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$error = '<b>Unknown error type</b> [' . $errno . ']: ' . $errstr . ' on line ' . $errline
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. ' in ' . $errfile;
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}
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// Truncate all previous outputs
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ob_clean();
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ob_end_clean();
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// Check if this request was made through the ajax thing
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if (isset($_REQUEST['ajax'])) {
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die('An error occurred while executing the script.|1|javascript:alert("' . (isset($errid) ? 'Error Log ID: '. $errid : 'Failed to log.') . '");');
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}
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// Check for dev mode
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$detailed = Config::local('dev', 'show_errors');
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// Build page
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$errorPage = '<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<title>Sakura Internal Error</title>
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<style type="text/css">
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body { margin: 0; padding: 0; background: #EEE; color: #000;
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font: 12px/20px Verdana, Arial, Helvetica, sans-serif; }
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h1, h2 { font-weight: 100; background: #CAA; padding: 8px 5px 10px;
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margin: 0; font-style: italic; font-family: serif; }
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h1 { border-radius: 8px 8px 0 0; }
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h2 { margin: 0 -10px; }
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.container { border: 1px solid #CAA; margin: 10px auto; background: #FFF;
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box-shadow: 2px 2px 1em #888; max-width: 1024px; border-radius: 10px; }
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.container .inner { padding: 0 10px; }
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.container .inner .error { background: #555; color: #EEE; border-left: 5px solid #C22;
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padding: 4px 6px; text-shadow: 0 1px 1px #888; white-space: pre-wrap;
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word-wrap: break-word; margin: 12px 0; border-radius: 5px; box-shadow: inset 0 0 1em #333; }
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.container .footer { border-top: 1px solid #CAA; font-size: x-small; padding: 0 5px 1px; }
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a { color: #77E; text-decoration: none; }
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a:hover { text-decoration: underline; }
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a:active { color: #E77; }
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</style>
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</head>
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<body>
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<div class="container">
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<h1>An error occurred while executing the script.</h1>
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<div class="inner">
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<p>To prevent potential security risks or data loss Sakura has stopped execution of the script.</p>';
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if (isset($errid)) {
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$errorPage .= '<p>The error and surrounding data has been logged.</p>
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<h2>' . (!$detailed ? 'Report the following text to a staff member' : 'Logged as') . '</h2>
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<pre class="error">' . $errid . '</pre>';
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} else {
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$errorPage .= '<p>Sakura was not able to log this error which could mean that there was an error
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with the database connection. If you\'re the system administrator check the database credentials
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and make sure the server is running and if you\'re not please let the system administrator
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know about this error if it occurs again.</p>';
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}
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if ($detailed) {
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$errorPage .= ' <h2>Summary</h2>
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<pre class="error">' . $error . '</pre>
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<h2>Backtraces</h2>';
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foreach (debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS) as $num => $trace) {
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$errorPage .= '<h3>#' . $num . '</h3><pre class="error">';
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foreach ($trace as $key => $val) {
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$errorPage .=
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str_pad(
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'[' . $key . ']',
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12
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) . '=> ' . (
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is_array($val) || is_object($val) ?
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json_encode($val) :
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$val
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) . "\r\n";
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}
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$errorPage .= '</pre>';
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}
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}
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$errorPage .= '</div>
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<div class="footer">
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Sakura r' . SAKURA_VERSION . '.
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</div>
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</div>
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</body>
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</html>';
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// Die and display error message
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die($errorPage);
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}
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/**
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* Send an e-mail.
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*
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* @param string $to Destination e-mail.
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* @param string $subject E-mail subject.
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* @param string $body Contents of the message.
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* @return bool|string Return whatever PHPMailer returns.
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*/
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public static function sendMail($to, $subject, $body)
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{
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// Initialise PHPMailer
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$mail = new PHPMailer();
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// Set to SMTP
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$mail->isSMTP();
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// Set the SMTP server host
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$mail->Host = Config::get('smtp_server');
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// Do we require authentication?
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$mail->SMTPAuth = Config::get('smtp_auth');
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// Do we encrypt as well?
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$mail->SMTPSecure = Config::get('smtp_secure');
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// Set the port to the SMTP server
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$mail->Port = Config::get('smtp_port');
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// If authentication is required log in as well
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if (Config::get('smtp_auth')) {
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$mail->Username = Config::get('smtp_username');
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$mail->Password = base64_decode(Config::get('smtp_password'));
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}
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// Add a reply-to header
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$mail->addReplyTo(Config::get('smtp_replyto_mail'), Config::get('smtp_replyto_name'));
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// Set a from address as well
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$mail->setFrom(Config::get('smtp_from_email'), Config::get('smtp_from_name'));
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// Set the addressee
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foreach ($to as $email => $name) {
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$mail->addBCC($email, $name);
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}
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// Subject line
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$mail->Subject = $subject;
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// Set body
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$mail->Body = $body;
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// Send the message
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$send = $mail->send();
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// Clear the addressee list
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$mail->clearAddresses();
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// If we got an error return the error
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if (!$send) {
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return $mail->ErrorInfo;
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}
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// Else just return whatever
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return $send;
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}
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/**
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* Clean a string
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*
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* @param string $string Dirty string.
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* @param bool $lower Make the string lowercase.
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* @param bool $noSpecial String all special characters.
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* @param bool $replaceSpecial Thing to replace special characters with.
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*
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* @return string Clean string.
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*/
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public static function cleanString($string, $lower = false, $noSpecial = false, $replaceSpecial = '')
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{
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// Run common sanitisation function over string
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$string = htmlentities($string, ENT_NOQUOTES | ENT_HTML401, Config::get('charset'));
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$string = stripslashes($string);
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$string = strip_tags($string);
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// If set also make the string lowercase
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if ($lower) {
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$string = strtolower($string);
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}
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// If set remove all characters that aren't a-z or 0-9
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if ($noSpecial) {
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$string = preg_replace('/[^a-z0-9]/', $replaceSpecial, $string);
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}
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// Return clean string
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return $string;
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}
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/**
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* Validate MX records.
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*
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* @param string $email E-mail address.
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*
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* @return bool Success.
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*/
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public static function checkMXRecord($email)
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{
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// Get the domain from the e-mail address
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$domain = substr(strstr($email, '@'), 1);
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// Check the MX record
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$record = checkdnsrr($domain, 'MX');
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// Return the record data
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return $record;
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}
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/**
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* Get the country code of a visitor.
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*
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* @return string 2 character country code.
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*/
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public static function getCountryCode()
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{
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// Attempt to get country code using PHP's built in geo thing
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if (function_exists("geoip_country_code_by_name")) {
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$code = geoip_country_code_by_name(Net::IP());
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// Check if $code is anything
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if ($code) {
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return $code;
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}
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}
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// Check if the required header is set and return it
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if (isset($_SERVER['HTTP_CF_IPCOUNTRY'])) {
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return $_SERVER['HTTP_CF_IPCOUNTRY'];
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}
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// Return XX as a fallback
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return 'XX';
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}
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/**
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* Check the entropy of a password.
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*
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* @param string $pw Password.
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*
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* @return double|int Entropy.
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*/
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public static function pwdEntropy($pw)
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{
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// Decode utf-8 chars
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$pw = utf8_decode($pw);
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// Count the amount of unique characters in the password string and calculate the entropy
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return count(count_chars($pw, 1)) * log(256, 2);
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}
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/**
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* Get the country name from a 2 character code.
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*
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* @param string $code The country code.
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*
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* @return string The country name.
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*/
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public static function getCountryName($code)
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{
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// Parse JSON file
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$iso3166 = json_decode(
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utf8_encode(
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file_get_contents(
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ROOT . Config::local('data', 'iso3166')
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)
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),
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true
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);
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// Check if key exists
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if (array_key_exists($code, $iso3166)) {
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return $iso3166[$code]; // If entry found return the full name
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}
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// Else return unknown
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return 'Unknown';
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}
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/**
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* Get the byte symbol for a unit from bytes.
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*
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* @param int $bytes The amount of bytes.
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*
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* @return string The converted amount with the symbol.
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*/
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public static function getByteSymbol($bytes)
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{
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// Return nothing if the input was 0
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if (!$bytes) {
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return;
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}
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// Array with byte symbols
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$symbols = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'];
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// Calculate byte entity
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$exp = floor(log($bytes) / log(1024));
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// Format the things
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$bytes = sprintf("%.2f " . $symbols[$exp], ($bytes / pow(1024, floor($exp))));
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// Return the formatted string
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return $bytes;
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}
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/**
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* Get the premium tracker data.
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*
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* @return array The premium tracker data.
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*/
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public static function getPremiumTrackerData()
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{
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// Create data array
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$data = [];
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// Get database stuff
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$table = Database::fetch('premium_log', true, null, ['transaction_id', true]);
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// Add raw table data to data array
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$data['table'] = $table;
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// Create balance entry
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$data['balance'] = 0.0;
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// Create users entry
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$data['users'] = [];
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// Calculate the thing
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foreach ($table as $row) {
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// Calculate balance
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$data['balance'] = $data['balance'] + $row['transaction_amount'];
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// Add userdata to table
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if (!array_key_exists($row['user_id'], $data['users'])) {
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$data['users'][$row['user_id']] = User::construct($row['user_id']);
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}
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}
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// Return the data
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return $data;
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}
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/**
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* Add a new entry to the tracker.
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*
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* @param int $id The user ID.
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* @param float $amount The amount of money.
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* @param string $comment A little information.
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*/
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public static function updatePremiumTracker($id, $amount, $comment)
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{
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Database::insert('premium_log', [
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'user_id' => $id,
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'transaction_amount' => $amount,
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'transaction_date' => time(),
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'transaction_comment' => $comment,
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]);
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}
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/**
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* Clean up the contents of <code> tags.
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*
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* @param string $text Dirty
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*
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* @return string Clean
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*/
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public static function fixCodeTags($text)
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{
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$parts = explode('<code>', $text);
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$newStr = '';
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if (count($parts) > 1) {
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foreach ($parts as $p) {
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$parts2 = explode('</code>', $p);
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if (count($parts2) > 1) {
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$code = str_replace('<br />', '', $parts2[0]);
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$code = str_replace('<br/>', '', $code);
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$code = str_replace('<br>', '', $code);
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$code = str_replace('<', '<', $code);
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$newStr .= '<code>'.$code.'</code>';
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$newStr .= $parts2[1];
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} else {
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$newStr .= $p;
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}
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}
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} else {
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$newStr = $text;
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}
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return $newStr;
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}
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}
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