<?php
/**
 * 邮件类
 *
 * 邮件操作类，目前只支持smtp服务的邮件发送
 */
namespace sendmsg;
final class Email{
	/**
	 * 邮件服务器
	 */
	private $email_server;
	/**
	 * 端口
	 */
	private $email_port = 25;
	/**
	 * 账号
	 */
	private $email_user;
	/**
	 * 密码
	 */
	private $email_password;
	/**
	 * 发送邮箱
	 */
	private $email_from;
	/**
	 * 间隔符
	 */
	private $email_delimiter = "\n";
	/**
	 * 站点名称
	 */
	private $site_name;

	public function get($key){
		if (!empty($this->$key)){
			return $this->$key;
		}else {
			return false;
		}
	}

	public function set($key, $value){
		if (!isset($this->$key)){
			$this->$key = $value;
			return true;
		}else {
			return false;
		}
	}

	/**
	 * 发送邮件
	 *
	 * @param string $email_to 发送对象邮箱地址
	 * @param string $subject 邮件标题
	 * @param string $message 邮件内容
	 * @param string $from 页头来源内容
	 * @return bool 布尔形式的返回结果
	 */
	public function send($email_to, $subject, $message, $from = ''){
		if(empty($email_to)) return false;
		$message = base64_encode($this->html($subject, $message));
		$email_to = $this->to($email_to);
		$header = $this->header($from);

		/**
		 * 发送
		 */
		if(!$fp = @fsockopen($this->email_server, $this->email_port, $errno, $errstr, 30)) {
			$this->resultLog($this->email_server.':'.$this->email_port." CONNECT - Unable to connect to the SMTP server");
			return false;
		}
		stream_set_blocking($fp, true);

		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != '220') {
			$this->resultLog($this->email_server.':'.$this->email_port.$lastmessage);
			return false;
		}

		fputs($fp, 'EHLO'." dsmall\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 220 && substr($lastmessage, 0, 3) != 250) {
			$this->resultLog($this->email_server.':'.$this->email_port." HELO/EHLO - $lastmessage");
			return false;
		}elseif(substr($lastmessage, 0, 3) == 220){
		   $lastmessage = fgets($fp, 512);
		   if(substr($lastmessage, 0, 3) != 250) {
				$this->resultLog($this->email_server.':'.$this->email_port." HELO/EHLO - $lastmessage");
				return false;
		   }
		}
		while(1) {
			if(substr($lastmessage, 3, 1) != '-' || empty($lastmessage)) {
				break;
			}
			$lastmessage = fgets($fp, 512);
		}

		fputs($fp, "AUTH LOGIN\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 334) {
			$this->resultLog($this->email_server.':'.$this->email_port." AUTH LOGIN - $lastmessage");
			return false;
		}

		fputs($fp, base64_encode($this->email_user)."\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 334) {
			$this->resultLog($this->email_server.':'.$this->email_port." USERNAME - $lastmessage");
			return false;
		}

		fputs($fp, base64_encode($this->email_password)."\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 235) {
			$this->resultLog($this->email_server.':'.$this->email_port." PASSWORD - $lastmessage");
			return false;
		}

		fputs($fp, "MAIL FROM: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $this->email_from).">\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 250) {
			fputs($fp, "MAIL FROM: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $this->email_from).">\r\n");
			$lastmessage = fgets($fp, 512);
			if(substr($lastmessage, 0, 3) != 250) {
				$this->resultLog($this->email_server.':'.$this->email_port." MAIL FROM - $lastmessage");
				return false;
			}
		}

		fputs($fp, "RCPT TO: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $email_to).">\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 250) {
			fputs($fp, "RCPT TO: <".preg_replace("/.*\<(.+?)\>.*/", "\\1", $email_to).">\r\n");
			$lastmessage = fgets($fp, 512);
			$this->resultLog($this->email_server.':'.$this->email_port." RCPT TO - $lastmessage");
			return false;
		}

		fputs($fp, "DATA\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 354) {
			$this->resultLog($this->email_server.':'.$this->email_port." DATA - $lastmessage");
			return false;
		}

		fputs($fp, "Date: ".gmdate('r')."\r\n");
		fputs($fp, "To: ".$email_to."\r\n");
		fputs($fp, "Subject: ".$subject."\r\n");
		fputs($fp, $header."\r\n");
		fputs($fp, "\r\n\r\n");
		fputs($fp, "$message\r\n.\r\n");
		$lastmessage = fgets($fp, 512);
		if(substr($lastmessage, 0, 3) != 250) {
			$this->resultLog($this->email_server.':'.$this->email_port." END - $lastmessage");
		}
		fputs($fp, "QUIT\r\n");
		return true;
	}

	public function send_sys_email($email_to, $subject, $message){
		$this->set('email_server',config('email_host'));
		$this->set('email_port',config('email_port'));
		$this->set('email_user',config('email_id'));
		$this->set('email_password',config('email_pass'));
		$this->set('email_from',config('email_addr'));
		$this->set('site_name',config('site_name'));
		$result = $this->send($email_to, $subject, $message);
		return $result;
	}

	/**
	 * 内容:邮件主体
	 *
	 * @param string $subject 邮件标题
	 * @param string $message 邮件内容
	 * @return string 字符串形式的返回结果
	 */
	private function html($subject, $message){
		$message = preg_replace("/href\=\"(?!http\:\/\/)(.+?)\"/i", 'href="'.SHOP_SITE_URL.'\\1"', $message);
		$tmp = "<html><head>";
		$tmp .= '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">';
		$tmp .= "<title>". $subject ."</title>";
		$tmp .= "</head><body>".$message."</body></html>";
		$message = $tmp;
		unset($tmp);
		return $message;
	}

	/**
	 * 发送对象邮件地址
	 *
	 * @param string $email_to 发送地址
	 * @return string 字符串形式的返回结果
	 */
	private function to($email_to){
		$email_to = preg_match('/^(.+?) \<(.+?)\>$/',$email_to, $mats) ? ($this->email_user ? '=?'.'UTF-8'.'?B?'.base64_encode($mats[1])."?= <$mats[2]>" : $mats[2]) : $email_to;
		return $email_to;
	}

	/**
	 * 内容:邮件标题
	 *
	 * @param string $subject 邮件标题
	 * @return string 字符串形式的返回结果
	 */
	private function subject($subject){
		$subject = '=?'.CHARSET.'?B?'.base64_encode(preg_replace("/[\r|\n]/", '', '['.$this->site_name.'] '.$subject)).'?=';
		return $subject;
	}

	/**
	 * 内容:邮件主体内容
	 *
	 * @param string $message 邮件主体内容
	 * @return string 字符串形式的返回结果
	 */
	private function message($message){
		$message = chunk_split(base64_encode(str_replace("\n", "\r\n", str_replace("\r", "\n", str_replace("\r\n", "\n", str_replace("\n\r", "\r", $message))))));
		return $message;
	}

	/**
	 * 内容:邮件页头
	 *
	 * @param string $from 邮件页头来源
	 * @return array $rs_row 返回数组形式的查询结果
	 */
	private function header($from=''){
		if ($from == ''){
			$from = '=?'.'UTF-8'.'?B?'.base64_encode($this->site_name)."?= <".$this->email_from.">" ;
		}else {
			$from = preg_match('/^(.+?) \<(.+?)\>$/',$from, $mats) ? '=?'.'UTF-8'.'?B?'.base64_encode($mats[1])."?= <$mats[2]>" : $from;
		}
		$header = "From: $from{$this->email_delimiter}";
		$header .= "X-Priority: 3{$this->email_delimiter}";
		$header .= "X-Mailer: csdeshang {$this->email_delimiter}";
		$header .= "MIME-Version: 1.0{$this->email_delimiter}";
		$header .= "Content-type: text/html; ";
		$header .= "charset=".'UTF-8'."{$this->email_delimiter}";
		$header .= "Content-Transfer-Encoding: base64{$this->email_delimiter}";
		$header .= 'Message-ID: <'.gmdate('YmdHs').'.'.substr(md5(microtime()), 0, 6).rand(100000, 999999).'@'.$_SERVER['HTTP_HOST'].">{$this->email_delimiter}";
		return $header;
	}

	/**
	 * 错误信息记录
	 *
	 * @param string $msg 错误信息
	 * @return bool 布尔形式的返回结果
	 */
	private function resultLog($msg){
		if (config('app_debug') === true){
			$fp = fopen('txt.txt','a+');
			fwrite($fp,$msg);
			fclose($fp);
			return true;
		}else {
			return true;
		}
	}
}
