<?
App::import('Sanitize');
class VaultShell extends Shell {
	/* vault.php - To be run in CLI via Cron. Fetches the mail from a certain mailbox, searches for a CMC Technologies Enquiry Numbeer
	 * then loads the data into the 'emails' table and the attachments in the 'email_attachments' table.
	 * Emails are discared or moved to a subfolder once processed
	 */
	

	var $uses = array('Enquiry', 'Email', 'EmailAttachment');
	
	
	function main() {
		/* Setup Connection to the IMAP server */
		$username = 'vault';
		$password = 'xjdYOsmJWc37'; /* The password for the account to be checked */
		
		$email_dir = '/var/www/quotenik1.2/app/emails/working';
		$attachment_dir = '/var/www/quotenik1.2/app/emails/working/attachments';
		$temp_filename = 'temp.eml';
		
		
		$mbox = imap_open("{saturn:143/novalidate-cert}INBOX", $username, $password) or die("can't connect: " . imap_last_error());
		$MC = imap_check($mbox);
		$number_of_messages = $MC->Nmsgs;
		
		/* Loop through the messages and sort them into ones to be processed or discarded */
		for ($i=1; $i <= $number_of_messages; $i++) {
			$this_header = imap_headerinfo($mbox, $i);
			preg_match("/CMC\d+([NVQWSO]|ACT|NT)E\d+-\d+/", $this_header->subject, $output);
			if(isset($output[0])) {
				
				$fetched_enquirynumber = $output[0];
				$enquiry = $this->Enquiry->findByTitle($fetched_enquirynumber);
				
				if($enquiry['Enquiry']['id'] == NULL) {  //It passes the Regex - but we don't find an Enquiry for it in the MER.
					imap_mail_move($mbox, $i, 'INBOX/Discarded'); //Discard it.
				}
				
				else { //Process it and store the message and its attachments.
				
				$message = $this->getMessage($mbox, $i, $this_header);
				$this->Email->create();
				$this->data['Email']['enquiry_id'] = $enquiry['Enquiry']['id'];
				$this->data['Email']['to'] = $message['to'];
				$this->data['Email']['cc'] = $message['cc'];
				$this->data['Email']['from'] = $message['from'];
				$this->data['Email']['date'] = $message['date'];
				$this->data['Email']['subject'] = $message['subject'];
				$this->data['Email']['body'] = $message['body'];
				
				//Sanitize::clean($this->data);				
				
				if($this->Email->save($this->data)) {
					$email_id = $this->Email->id;
					
					$attachment_files = $this->fetchAttachments($mbox, $i, $temp_filename, $email_dir, $attachment_dir);
					foreach ($attachment_files as $attachment) {
						$this->EmailAttachment->create();
						$this->data['EmailAttachment']['email_id'] = $email_id;
						$this->data['EmailAttachment']['name'] = $attachment;
						$this->data['EmailAttachment']['type'] = mime_content_type("$attachment_dir/$attachment"); //Depreciated but works better than the new one
						$this->data['EmailAttachment']['size'] = filesize("$attachment_dir/$attachment");
						$this->data['EmailAttachment']['data'] = fread(fopen("$attachment_dir/$attachment", "r"), $this->data['EmailAttachment']['size']);
 						if ($this->EmailAttachment->save($this->data)) {
 							echo "Saved file successfully to database\n";
						}
						else {
							echo "Something went wrong saving the file to the DB\n";
						}
					
					}
					echo "Email stored in the DB under enquiry ".$enquiry['Enquiry']['title']." Will be moved to the stored folder\n";
					imap_mail_move($mbox, $i, 'INBOX/Stored'); //Move it to the stored folder.
					$this->clearEmailAttachmentDirs($email_dir, $temp_filename, $attachment_dir, $attachment_files);
				}
				else {
					echo 'Unable to save the Email\n';
				}
				
				}
			}
			else {
				/* Can't find a valid-looking CMC Enquiry Number. Move the message to the discarded folder 
				 * I may change this to simply delete the emails. This will do for now, but it's doubling up on the storage for useless files.
				 * */
				if(imap_mail_move($mbox, $i, 'INBOX/Discarded')) {
					echo "Message Number $i contains no valid Enquiry number. Has been discarded\n";
				}
				else {
					echo "Message Number $i contains no valid Enquiry number. But could not be discarded\n";
				}
			}
			
		}
		
		
		/* Finished working with the IMAP server. Make the changes and close the connection */
		imap_expunge($mbox);
		imap_close($mbox); 
	}


/* Fetches and Writes attachements to a directory under $email_dir.
 * Uses uudeview to do the decoding 
 * */ 	
	
function fetchAttachments($mailbox, $msg_number, $filename, $email_dir, $attachment_dir) {
	
	/* Make the temporary directory to store this email and the attachments */
	if (!file_exists($email_dir)){
    mkdir($email_dir);
  	}
  	if (!file_exists($attachment_dir)) {
  		mkdir($attachment_dir);
	} 
 
  $email_file = $email_dir.'/'.$filename;
  imap_savebody($mailbox, $email_file, $msg_number);
  $command = "uudeview -i $email_file -p $attachment_dir";
  $output = array();
  exec($command, $output);
  
  /* Check the $output array and find the filenames of the attachments */
  $filenames = array();
 
  for($i=0; $i< count($output); $i++) {
  	$matches = preg_match("/\bsuccessfully\b/", $output[$i]); 
  	if($matches > 0) {
  		$result = explode("/", $output[$i]);
  		$filenames[] = $result[8]; //	
	}
  }

return $filenames;
}

/* clearEmailyAttachmentDirs($email_dir, $filename, $attachment_dir, $attachments)
 * 
 * Deletes $email_dir/$filename.eml and the attachments specified in $attachment_dir
 * */ 
function clearEmailAttachmentDirs($email_dir, $filename, $attachment_dir, $attachments) {
		unlink("$email_dir/$filename");
		foreach ($attachments as $attachment) {
			unlink("$attachment_dir/$attachment");
		}
}


function getMessage($mbox, $msgnumber, $headers) {

	$subject = $headers->subject;
	$date = $headers->date;
	$recipients = $this->getRecipients($headers);
	$message['subject'] = $subject;
	$message['date'] = $date;
	$message['to'] = $recipients['to'];
	$message['from'] = $recipients['from'];
	$message['cc'] = $recipients['cc'];
	
		
	$message['body'] = $this->getBody($mbox, $msgnumber);
	return $message;

}
/* get Recipients from the headers of an email  */
function getRecipients($headers) {

	$recipients = array();	
	$recipients['to'] = "";
	$recipients['from'] = "";
	$recipients['cc'] = "";	
	
	if(isset($headers->to)) {
		$to = $headers->to;
		if(count($to) > 0) {
		foreach ($to as $id => $object) {
			$recipients['to'] .= "$object->mailbox@$object->host ";	
			}
		}
	}
	if(isset($headers->cc)) {
		$cc = $headers->cc;
		if(count($cc) > 0) {
		foreach ($cc as $id => $object) {
				$recipients['cc'] .= "$object->mailbox@$object->host ";
			}
		
		}
	}
	
	if(isset($headers->from)) {
		$from = $headers->from;
		if(count($from) > 0) {
		foreach ($from as $id => $object) {
				$recipients['from'] .= "$object->mailbox@$object->host";
			}
		}
	}

	
return $recipients;
}
	 

function getBody($mbox, $msgnumber) {
	$structure = imap_fetchstructure($mbox, $msgnumber);
	if (!empty($structure->parts)) {
    	$body = $this->getParts($structure->parts, $mbox, $msgnumber);
	}
     else {
    $body = imap_body($mbox, $msgnumber); /* Or get the plaintext */
	}
	return $body;
}


function getParts($parts, $mbox, $msgnumber) {
	for ($i = 0, $j = count($parts); $i < $j; $i++) {
        $part = $parts[$i];
        

        if ($part->subtype == 'HTML') { /* Find the HTML component of the body */
             $body = imap_fetchbody($mbox, $msgnumber, $i+1);
        	 break; //Found HTML (preferred) So end the loop.
        }
        elseif($part->subtype == 'PLAIN') {
        	 $body = imap_fetchbody($mbox, $msgnumber, $i+1);
     		
     	}
     	elseif(isset($part->parts)) {
     		$body = $this->getParts($part->parts, $mbox, $msgnumber); /* Handle these goddamn Outlook messages */
     		
     	}
	}
	return $body;

}


}	
	
	?>