/application/classes/email.php

<?php
/* game-services
 * https://bitbucket.org/polarbearswithchainsaws/game-services
 * Copyright (c) 2013 Scott Wichser
 * 
 * Licensed under the MIT License. See COPYING for license text.
 */

namespace app\Classes;

use mvcish\Config;

// The Email class is used for calculating the moon phase. Nah, just kidding,
// it's for sending email. :P
class Email {
  var $from = "";
  var $replyto = "";
  var $to = "";
  
  var $subject = "";
  var $textBody = "";
  var $htmlBody = "";
  var $attachments = Array();
  
  function __construct($to, $subject) {
    $this->from = Config::load('main', 'fromEmail');
    $this->to = $to;
    $this->subject = $subject;
  }
  
  function setFromAddress($from) {
    $this->from = $from;
  }
  
  function setReplyToAddress($replyto) {
    $this->replyto = $replyto;
  }
  
  // Plain text body
  function setTextBody($text) {
    $this->textBody = $text;
  }
  
  // HTML body
  function setHTMLBody($html) {
    $this->htmlBody = $html;
  }
  
  // Add an attachment (file is not read until the send method is called)
  function addAttachment($filename, $displayname, $mimetype) {
    $this->attachments[] = Array(
      'filename' => $filename,
      'displayname' => $displayname,
      'mimetype' => $mimetype
    );
  }
  
  // Send the message!
  function send() {
    // Plain text body is required
    if (!strlen($this->textBody)) {
      return false;
    }
    
    // Add the From header
    $headers = "From: {$this->from}";
    
    // If set, add the Reply-To header
    if (!!strlen($this->replyto)) {
      $headers .= "\r\nReply-To: {$this->from}";
    }
    
    // Check if there are attachments and/or an HTML body
    $hasAttachments = (!!sizeof($this->attachments));
    $hasHTML = (!!strlen($this->htmlBody));
    
    // If it has either attachments or an HTML body, we'll need a hash for the
    // multipart boundary
    if ($hasAttachments || $hasHTML) {
      $random_hash = md5(mcrypt_create_iv(16, MCRYPT_DEV_URANDOM));
    }
    
    // If we have attachments, this will be a multipart/mixed message. It will
    // have a multipart/alternative message embedded as well if there is an
    // HTML body
    if ($hasAttachments) {
      $headers .= "\r\nContent-Type: multipart/mixed; boundary=\"PHP-mixed-{$random_hash}\"";
    }
    // Otherwise, if we just have an HTML body and no attachments, it will be
    // a multipart/alternative message
    else if ($hasHTML) {
      $headers .= "\r\nContent-Type: multipart/alternative; boundary=\"PHP-alt-{$random_hash}\""; 
    }
    
    // If we have either attachments or an HTML body, do the fancy processing
    if ($hasAttachments || $hasHTML) {
      $message = '';
      
      // If we have attachments, we need to start with this for containing the
      // message body/bodies
      if ($hasAttachments) {
        $message .= "--PHP-mixed-{$random_hash}\r\n";
        $message .= "Content-Type: multipart/alternative; boundary=\"PHP-alt-{$random_hash}\"\r\n\r\n";
      }
      
      // Text body first
      $message .= "--PHP-alt-{$random_hash}\r\n";
      $message .= "Content-Type: text/plain; charset=\"utf-8\"\r\n";
      $message .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
      $message .= $this->textBody;
      
      // Then HTML body if it exists
      if ($hasHTML) {
        $message .= "\r\n\r\n--PHP-alt-{$random_hash}\r\n";
        $message .= "Content-Type: text/html; charset=\"utf-8\"\r\n";
        $message .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
        $message .= $this->htmlBody;
      }
      
      // Finish off the multipart/alternative message
      $message .= "\r\n\r\n--PHP-alt-{$random_hash}";
      
      // Then add attachments if they exist
      if ($hasAttachments) {
        foreach($this->attachments as $attachment) {
          $message .= "\r\n\r\n--PHP-mixed-{$random_hash}\r\n";
          $message .= "Content-Type: {$attachment['mimetype']}; name=\"{$attachment['displayname']}\"\r\n";
          $message .= "Content-Transfer-Encoding: base64\r\n";
          $message .= "Content-Disposition: attachment\r\n\r\n";
          $message .= chunk_split(base64_encode(file_get_contents($attachment['filename'])));
        }
        
        // Finish off the multipart/mixed message
        $message .= "--PHP-mixed-{$random_hash}\r\n\r\n";
      }
    }
    // If it's just a plain text message with no attachments or HTML, we can
    // just have a nice simply message.
    else {
      $message = $this->textBody;
    }
    
    // Send it off!
    return @mail($this->to, $this->subject, $message, $headers);
  }
}