<?php

if (!defined('ROOT')) exit('Can\'t Access !');
class include_smtp {
    public $smtp_port;
    public $time_out;
    public $host_name;
    public $log_file;
    public $relay_host;
    public $debug;
    public $auth;
    public $user;
    public $pass;
    private $sock;
    public function __construct($relay_host = "",$smtp_port = 25,$auth = false,$user,$pass) {
        $this->debug = false;
        $this->smtp_port = $smtp_port;
        $this->relay_host = $relay_host;
        $this->time_out = 30;
#
        $this->auth = $auth;
        $this->user = $user;
        $this->pass = $pass;
#
        $this->host_name = "localhost";
        $this->log_file = "";
        $this->sock = FALSE;
    }
    public function sendmail($to,$from,$subject = "",$body = "",$mailtype,$cc = "",$bcc = "",$additional_headers = "") {
        $mail_from = $this->get_address($this->strip_comment($from));
        $body = preg_replace("/(^|(\r\n))(\.)/","\1.\3",$body);
        $header .= "MIME-Version:1.0\r\n";
        if($mailtype=="HTML") {
            $header .= "Content-Type:text/html; charset=utf-8\r\n";
        }
        $header .= "To: ".$to."\r\n";
        if ($cc != "") {
            $header .= "Cc: ".$cc."\r\n";
        }
        $header .= "From: $from<".$from.">\r\n";
        $header .= "Subject: ".$subject."\r\n";
        $header .= $additional_headers;
        $header .= "Date: ".date("r")."\r\n";
        $header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
        list($msec,$sec) = explode(" ",microtime());
        $header .= "Message-ID: <".date("YmdHis",$sec).".".($msec*1000000).".".$mail_from.">\r\n";
        $TO = explode(",",$this->strip_comment($to));
        if ($cc != "") {
            $TO = array_merge($TO,explode(",",$this->strip_comment($cc)));
        }
        if ($bcc != "") {
            $TO = array_merge($TO,explode(",",$this->strip_comment($bcc)));
        }
        $sent = TRUE;
        foreach ($TO as $rcpt_to) {
            $rcpt_to = $this->get_address($rcpt_to);
            if (!$this->smtp_sockopen($rcpt_to)) {
                $this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
                $sent = FALSE;
                continue;
            }
            if ($this->smtp_send($this->host_name,$mail_from,$rcpt_to,$header,$body)) {
                $this->log_write("E-mail has been sent to <".$rcpt_to.">\n");
            }else {
                $this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");
                $sent = FALSE;
            }
            fclose($this->sock);
            $this->log_write("Disconnected from remote host\n");
        }
        return $sent;
    }
    private function smtp_send($helo,$from,$to,$header,$body = "") {
        if (!$this->smtp_putcmd("HELO",$helo)) {
            return $this->smtp_error("sending HELO command");
        }
#auth
        if($this->auth) {
            if (!$this->smtp_putcmd("AUTH LOGIN",base64_encode($this->user))) {
                return $this->smtp_error("sending HELO command");
            }
            if (!$this->smtp_putcmd("",base64_encode($this->pass))) {
                return $this->smtp_error("sending HELO command");
            }
        }
#
        if (!$this->smtp_putcmd("MAIL","FROM:<".$from.">")) {
            return $this->smtp_error("sending MAIL FROM command");
        }
        if (!$this->smtp_putcmd("RCPT","TO:<".$to.">")) {
            return $this->smtp_error("sending RCPT TO command");
        }
        if (!$this->smtp_putcmd("DATA")) {
            return $this->smtp_error("sending DATA command");
        }
        if (!$this->smtp_message($header,$body)) {
            return $this->smtp_error("sending message");
        }
        if (!$this->smtp_eom()) {
            return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
        }
        if (!$this->smtp_putcmd("QUIT")) {
            return $this->smtp_error("sending QUIT command");
        }
        return TRUE;
    }
    private function smtp_sockopen($address) {
        if ($this->relay_host == "") {
            return $this->smtp_sockopen_mx($address);
        }else {
            return $this->smtp_sockopen_relay();
        }
    }
    private function smtp_sockopen_relay() {
        $this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
        $this->sock = @stream_socket_client($this->relay_host.':'.$this->smtp_port,$errno,$errstr,$this->time_out);
        if (!($this->sock &&$this->smtp_ok())) {
            $this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
            $this->log_write("Error: ".$errstr." (".$errno.")\n");
            return FALSE;
        }
        $this->log_write("Connected to relay host ".$this->relay_host."\n");
        return TRUE;
    }
    private function smtp_sockopen_mx($address) {
        $domain = preg_replace("/^.+@([^@]+)$/","\1",$address);
        if (!@getmxrr($domain,$MXHOSTS)) {
            $this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
            return FALSE;
        }
        foreach ($MXHOSTS as $host) {
            $this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
            $this->sock = @stream_socket_client($host.':'.$this->smtp_port,$errno,$errstr,$this->time_out);
            if (!($this->sock &&$this->smtp_ok())) {
                $this->log_write("Warning: Cannot connect to mx host ".$host."\n");
                $this->log_write("Error: ".$errstr." (".$errno.")\n");
                continue;
            }
            $this->log_write("Connected to mx host ".$host."\n");
            return TRUE;
        }
        $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ",$MXHOSTS).")\n");
        return FALSE;
    }
    private function smtp_message($header,$body) {
        fputs($this->sock,$header."\r\n".$body);
        $this->smtp_debug("> ".str_replace("\r\n","\n"."> ",$header."\n> ".$body."\n> "));
        return TRUE;
    }
    private function smtp_eom() {
        fputs($this->sock,"\r\n.\r\n");
        $this->smtp_debug(". [EOM]\n");
        return $this->smtp_ok();
    }
    private function smtp_ok() {
        $response = str_replace("\r\n","",fgets($this->sock,512));
        $this->smtp_debug($response."\n");
        if (!preg_match("/^[23]/",$response)) {
            fputs($this->sock,"QUIT\r\n");
            fgets($this->sock,512);
            $this->log_write("Error: Remote host returned \"".$response."\"\n");
            return FALSE;
        }
        return TRUE;
    }
    private function smtp_putcmd($cmd,$arg = "") {
        if ($arg != "") {
            if($cmd=="") $cmd = $arg;
            else $cmd = $cmd." ".$arg;
        }
        fputs($this->sock,$cmd."\r\n");
        $this->smtp_debug("> ".$cmd."\n");
        return $this->smtp_ok();
    }
    private function smtp_error($string) {
        $this->log_write("Error: Error occurred while ".$string.".\n");
        return FALSE;
    }
    private function log_write($message) {
        $this->smtp_debug($message);
        if ($this->log_file == "") {
            return TRUE;
        }
        $message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
        if (!@file_exists($this->log_file) ||!($fp = @fopen($this->log_file,"a"))) {
            $this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");
            return FALSE;
        }
        flock($fp,LOCK_EX);
        fputs($fp,$message);
        fclose($fp);
        return TRUE;
    }
    private function strip_comment($address) {
        $comment = "\([^()]*\)";
        while (preg_match("%$comment%",$address)) {
            $address = ereg_replace($comment,"",$address);
        }
        return $address;
    }
    private function get_address($address) {
        $address = preg_replace("/([ \t\r\n])+/","",$address);
        $address = preg_replace("/^.*<(.+)>.*$/","\1",$address);
        return $address;
    }
    private function smtp_debug($message) {
        if ($this->debug) {
            echo $message;
        }
    }
}