<?php
/**
 * @file
 * This is the main module file for SMTP, which will let us
 * send emails using SMTP instead of PHP's mail() command. 
*/

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;



// Hook_menu
function smtp_menu() {
  
  $items = array();     
  
  $items["admin/config/smtp"] = array(
    "title" => "SMTP settings",
    "description" => "Configure SMTP module",
    "page_callback" => "fp_render_form",
    "page_arguments" => array("smtp_settings_form", "system_settings"),
    "access_arguments" => array("de_can_administer_smtp"),
    "page_settings" => array(
      
      "menu_icon" => fp_get_module_path('smtp') . "/icons/email.png",      
      "menu_links" => array(         
        0 => array(
          "text" => "Admin Console",
          "path" => "admin-tools/admin",
          "query" => "de_catalog_year=%DE_CATALOG_YEAR%",
        ),
      ),
    ),    
    "type" => MENU_TYPE_NORMAL_ITEM,
    "tab_parent" => "admin-tools/admin",    
  );
  
  return $items;
    
}


function smtp_settings_form() {
  $form = array();
  
  $form['mark_top'] = array(
    'value' => '<p>Configure the connection to your SMTP server here.</p>',
  );
  
  $form['smtp_host'] = array(
    'type' => 'textfield',
    'label' => t('Host'),
    'value' => variable_get('smtp_host', ''),
    'description' => 'Ex: mail.example.com',
  );
  
  $form['smtp_port'] = array(
    'type' => 'textfield',
    'label' => t('Port'),
    'value' => variable_get('smtp_port', ''),
    'size' => 10,
    'description' => 'Ex: 25, 587, 465',
  );

  $form['smtp_secure'] = array(
    'type' => 'select',
    'label' => t('Security'),
    'value' => variable_get('smtp_secure', ''),
    'options' => array('none' => 'none', 'tls' => 'TLS', 'ssl' => 'SSL'),
    'description' => 'Ex: TLS',
  );

  $form['smtp_username'] = array(
    'type' => 'textfield',
    'label' => t('Username'),
    'value' => variable_get('smtp_username', ''),
    'description' => '',
  );
  
  $form['smtp_password'] = array(
    'type' => 'textfield',
    'label' => t('Password'),
    'value' => variable_get('smtp_password', ''),
    'description' => t('Note:  The password will be stored within the database, in the Variables table.
                        Make sure you take the necessary precautions to ensure the security of your database.'),
  );
        

  $form['smtp_from_email_address'] = array(
    'type' => 'textfield',
    'label' => t('From Email Address'),
    'value' => variable_get('smtp_from_email_address', 'noreply@yourdomain.com'),
    'description' => 'What is the default "from" address on emails we send?',    
  );

  $form['smtp_from_email_name'] = array(
    'type' => 'textfield',
    'label' => t('From Email Name'),
    'value' => variable_get('smtp_from_email_name', 'NoReply - FlightPath'),
    'description' => 'What is the default "from" name on emails we send?',    
  );
  
  
  
  
  return $form;
}


/**
 * For attachments, the array can be one of two methods:
 * 
 * (1)
 *   $arr["full_filename"] => "filename"
 * or
 * (2)
 *   $arr['filename'] = "string that makes up atachment"
 * 
 * For method #2, $bool_string_attachment must be set to TRUE.
 * 
 * 
 */
function smtp_mail($to, $subject, $msg, $bool_html = FALSE, $attachments = array(), $bool_string_attachment = FALSE) {
    
  $system_path = trim($GLOBALS["fp_system_settings"]["file_system_path"]);
  require_once("$system_path/libraries/PHPMailer/src/Exception.php");
  require_once("$system_path/libraries/PHPMailer/src/PHPMailer.php");
  require_once("$system_path/libraries/PHPMailer/src/SMTP.php");  

  $msg = trim($msg);
  if ($msg == "") {
    if (count($attachments) == 0) {
      // This is a completely empty message!  Don't send anything.
      watchdog("smtp", "Not sending email to $to ($subject).  No message or attachments.", array(), WATCHDOG_DEBUG);
      return FALSE;
    }
    else {
      $msg = "   ";  // We DO have attachments, so add some spaces so we have a string in the variable.
    }
  }
  

  $mail = new PHPMailer();
  
  // Settings
  $mail->IsSMTP();
  $mail->CharSet = 'UTF-8';
  
  $mail->Host       = variable_get('smtp_host', '');
  $mail->SMTPDebug  = 0;                     // enables SMTP debug information (for testing)
  // 0 = no output, 1 = errors and messages, 2 = messages only.
  
  $mail->SMTPSecure = variable_get('smtp_secure', '');     // tls, ssl, and none are allowed.
    
  $mail->SMTPAuth   = TRUE;                  // enable SMTP authentication
  $mail->Port       = variable_get('smtp_port', '');                    // set the SMTP port
  $mail->Username   = variable_get('smtp_username', '');
  $mail->Password   = variable_get('smtp_password', '');        // SMTP account password example
  
  // Content
  //$mail->isHTML(true);                                  // Set email format to HTML
  //$mail->Subject = 'Here is the subject';
  //$mail->Body    = 'This is the HTML message body <b>in bold!</b>';
  //$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
  
  // Content
  if ($bool_html) {
    $mail->isHTML(TRUE);
    $mail->msgHTML($msg);    
  }
  else {
    $mail->Body = $msg;
  }
   
  $mail->Subject = $subject;
  

     
  $mail->setFrom(variable_get('smtp_from_email_address', 'noreply@yourdomain.com'), variable_get('smtp_from_email_name', 'NoReply - FlightPath'));
  
  
  //Recipients
  $temp = explode(',', $to);
  foreach ($temp as $line) {
    $line = trim($line);
    if ($line != "") {
      $mail->addAddress($line);     // Add a recipient    
    }
  } 
   
  
  //$mail->addAddress('ellen@example.com', 'Ellen Smith');               // Name is optional
  //$mail->addReplyTo('info@example.com', 'Information');
  //$mail->addCC('cc@example.com');
  //$mail->addBCC('bcc@example.com');  
  
  if (!$bool_string_attachment) {
    if (count($attachments) > 0) {
      foreach ($attachments as $full_filename => $filename) {  
        $mail->addAttachment($full_filename, $filename);
      }
    }
  }
  else {
    // This IS a string attachment
    if (count($attachments) > 0) {
      foreach ($attachments as $filename => $string) {  
        $mail->addStringAttachment($string, $filename);
      }
    }    
  }  
  
  $x = $mail->send();    
  if (!$x) {
    fpm("PHPMailer error: " . $mail->ErrorInfo);
    watchdog("smtp", "PHPMailer error: " . $mail->ErrorInfo, array(), WATCHDOG_ERROR);
    return FALSE;
  }
    
  return TRUE;
  
} // smtp_mail