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Proposal to improve stylilng for mails with inline css


misthero
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We already have the ability to manually edit every single mail, but if you want to customize every mail in your shop so they look all the same and you have 2 or 3 languages or more you are forced to edit tens of files one by one.

 

I think the system can be improved in many ways.

 

As for now every style is hardcoded inside every html file, Prestashop developers have recently added a template var {color} to modify 1 color in our mails, but this is far from the final solution in my opinion.

 

Mails are part of the marketing strategy and online shops should have a unique and personal style.

 

For example there is a drupal module (simplenews) that allow you to create a css file for your mails and css styling get included (embedded) in your emails in every affected tag.

 

for example if you have in your css a declaration like:

 

body {
background-color:red;
}

 

the resulting mail will output:

 

<body style="background-color:red;">

 

for now I made something much more simplier that I'm going to share, this will include a css file as inline css in the header of every mail allowing you to edit only 1 css file to style every mail in your shop at once

 

Most modern mail clients will read it normally (gmail, yahoo, hotmail) and it works pretty good, this is far from being the optimal solution until someting like this become part of the core and html mails start using classes for tags to customize even more but if you are intrested in a temporary solution here is what i have done:

 

create a file mail.css in your mail folder, you can find it in your prestashop root.

 

now copy classes/Mail.php in override/classes/Mail.php and replace the content with this:

 

include_once(_PS_SWIFT_DIR_.'Swift.php');
include_once(_PS_SWIFT_DIR_.'Swift/Connection/SMTP.php');
include_once(_PS_SWIFT_DIR_.'Swift/Connection/NativeMail.php');
include_once(_PS_SWIFT_DIR_.'Swift/Plugin/Decorator.php');
class Mail extends MailCore
{
const TYPE_HTML = 1;
const TYPE_TEXT = 2;
const TYPE_BOTH = 3;
/**
 * Send Email
 *
 * @param int $id_lang Language of the email (to translate the template)
 * @param string $template Template: the name of template not be a var but a string !
 * @param string $subject
 * @param string $template_vars
 * @param string $to
 * @param string $to_name
 * @param string $from
 * @param string $from_name
 * @param array $file_attachment Array with three parameters (content, mime and name). You can use an array of array to attach multiple files
 * @param bool $modeSMTP
 * @param string $template_path
 * @param bool $die
 */
public static function Send($id_lang, $template, $subject, $template_vars, $to,
 $to_name = null, $from = null, $from_name = null, $file_attachment = null, $mode_smtp = null, $template_path = _PS_MAIL_DIR_, $die = false, $id_shop = null)
{
 $configuration = Configuration::getMultiple(array(
  'PS_SHOP_EMAIL',
  'PS_MAIL_METHOD',
  'PS_MAIL_SERVER',
  'PS_MAIL_USER',
  'PS_MAIL_PASSWD',
  'PS_SHOP_NAME',
  'PS_MAIL_SMTP_ENCRYPTION',
  'PS_MAIL_SMTP_PORT',
  'PS_MAIL_METHOD',
  'PS_MAIL_TYPE'
 ), null, null, $id_shop);

 // Returns immediatly if emails are deactivated
 if ($configuration['PS_MAIL_METHOD'] == 3)
  return true;

 $theme_path = _PS_THEME_DIR_;

 $css = Mail::getCss();
 // Get the path of theme by id_shop if exist
 if (is_numeric($id_shop) && $id_shop)
 {
  $shop = new Shop((int)$id_shop);
  $theme_name = $shop->getTheme();
  if (_THEME_NAME_ != $theme_name)
$theme_path = _PS_ROOT_DIR_.'/themes/'.$theme_name.'/';
 }
 if (!isset($configuration['PS_MAIL_SMTP_ENCRYPTION']))
  $configuration['PS_MAIL_SMTP_ENCRYPTION'] = 'off';
 if (!isset($configuration['PS_MAIL_SMTP_PORT']))
  $configuration['PS_MAIL_SMTP_PORT'] = 'default';
 // Sending an e-mail can be of vital importance for the merchant, when his password is lost for example, so we must not die but do our best to send the e-mail
 if (!isset($from) || !Validate::isEmail($from))
  $from = $configuration['PS_SHOP_EMAIL'];
 if (!Validate::isEmail($from))
  $from = null;
 // $from_name is not that important, no need to die if it is not valid
 if (!isset($from_name) || !Validate::isMailName($from_name))
  $from_name = $configuration['PS_SHOP_NAME'];
 if (!Validate::isMailName($from_name))
  $from_name = null;
 // It would be difficult to send an e-mail if the e-mail is not valid, so this time we can die if there is a problem
 if (!is_array($to) && !Validate::isEmail($to))
 {
  Tools::dieOrLog(Tools::displayError('Error: parameter "to" is corrupted'), $die);
  return false;
 }
 if (!is_array($template_vars))
  $template_vars = array();
 // Do not crash for this error, that may be a complicated customer name
 if (is_string($to_name) && !empty($to_name) && !Validate::isMailName($to_name))
  $to_name = null;
 if (!Validate::isTplName($template))
 {
  Tools::dieOrLog(Tools::displayError('Error: invalid e-mail template'), $die);
  return false;
 }
 if (!Validate::isMailSubject($subject))
 {
  Tools::dieOrLog(Tools::displayError('Error: invalid e-mail subject'), $die);
  return false;
 }
 /* Construct multiple recipients list if needed */
 if (is_array($to) && isset($to))
 {
  $to_list = new Swift_RecipientList();
  foreach ($to as $key => $addr)
  {
$to_name = null;
$addr = trim($addr);
if (!Validate::isEmail($addr))
{
 Tools::dieOrLog(Tools::displayError('Error: invalid e-mail address'), $die);
 return false;
}
if (is_array($to_name))
{
 if ($to_name && is_array($to_name) && Validate::isGenericName($to_name[$key]))
  $to_name = $to_name[$key];
}
if ($to_name == null)
 $to_name = $addr;
/* Encode accentuated chars */
$to_list->addTo($addr, '=?UTF-8?B?'.base64_encode($to_name).'?=');
  }
  $to_plugin = $to[0];
  $to = $to_list;
 } else {
  /* Simple recipient, one address */
  $to_plugin = $to;
  if ($to_name == null)
$to_name = $to;
  $to = new Swift_Address($to, '=?UTF-8?B?'.base64_encode($to_name).'?=');
 }
 try {
  /* Connect with the appropriate configuration */
  if ($configuration['PS_MAIL_METHOD'] == 2)
  {
if (empty($configuration['PS_MAIL_SERVER']) || empty($configuration['PS_MAIL_SMTP_PORT']))
{
 Tools::dieOrLog(Tools::displayError('Error: invalid SMTP server or SMTP port'), $die);
 return false;
}
$connection = new Swift_Connection_SMTP($configuration['PS_MAIL_SERVER'], $configuration['PS_MAIL_SMTP_PORT'],
 ($configuration['PS_MAIL_SMTP_ENCRYPTION'] == 'ssl') ? Swift_Connection_SMTP::ENC_SSL :
 (($configuration['PS_MAIL_SMTP_ENCRYPTION'] == 'tls') ? Swift_Connection_SMTP::ENC_TLS : Swift_Connection_SMTP::ENC_OFF));
$connection->setTimeout(4);
if (!$connection)
 return false;
if (!empty($configuration['PS_MAIL_USER']))
 $connection->setUsername($configuration['PS_MAIL_USER']);
if (!empty($configuration['PS_MAIL_PASSWD']))
 $connection->setPassword($configuration['PS_MAIL_PASSWD']);
  }
  else
$connection = new Swift_Connection_NativeMail();
  if (!$connection)
return false;
  $swift = new Swift($connection, Configuration::get('PS_MAIL_DOMAIN', null, null, $id_shop));
  /* Get templates content */
  $iso = Language::getIsoById((int)$id_lang);
  if (!$iso)
  {
Tools::dieOrLog(Tools::displayError('Error - No ISO code for email'), $die);
return false;
  }
  $template = $iso.'/'.$template;
  $module_name = false;
  $override_mail = false;
  // get templatePath
  if (preg_match('#'.__PS_BASE_URI__.'modules/#', str_replace(DIRECTORY_SEPARATOR, '/', $template_path)) && preg_match('#modules/([a-z0-9_-]+)/#ui', str_replace(DIRECTORY_SEPARATOR, '/',$template_path), $res))
$module_name = $res[1];
  if ($module_name !== false && (file_exists($theme_path.'modules/'.$module_name.'/mails/'.$template.'.txt') ||
file_exists($theme_path.'modules/'.$module_name.'/mails/'.$template.'.html')))
$template_path = $theme_path.'modules/'.$module_name.'/mails/';
  elseif (file_exists($theme_path.'mails/'.$template.'.txt') || file_exists($theme_path.'mails/'.$template.'.html'))
  {
$template_path = $theme_path.'mails/';
$override_mail  = true;
  }
  if (!file_exists($template_path.$template.'.txt') && ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_TEXT))
  {
Tools::dieOrLog(Tools::displayError('Error - The following e-mail template is missing:').' '.$template_path.$template.'.txt', $die);
return false;
  }
  else if (!file_exists($template_path.$template.'.html') && ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_HTML))
  {
Tools::dieOrLog(Tools::displayError('Error - The following e-mail template is missing:').' '.$template_path.$template.'.html', $die);
return false;
  }
  $template_html = file_get_contents($template_path.$template.'.html');
  $template_txt = strip_tags(html_entity_decode(file_get_contents($template_path.$template.'.txt'), null, 'utf-8'));
  if ($override_mail && file_exists($template_path.$iso.'/lang.php'))
 include_once($template_path.$iso.'/lang.php');
  else if ($module_name && file_exists($theme_path.'mails/'.$iso.'/lang.php'))
include_once($theme_path.'mails/'.$iso.'/lang.php');
  else
include_once(_PS_MAIL_DIR_.$iso.'/lang.php');
  /* Create mail and attach differents parts */
  // $message = new Swift_Message('['.Configuration::get('PS_SHOP_NAME', null, null, $id_shop).'] '.$subject);
  $message = new Swift_Message($subject);
  /* Set Message-ID - getmypid() is blocked on some hosting */
  $message->setId(Mail::generateId());
  $message->headers->setEncoding('Q');
  if (Configuration::get('PS_LOGO_MAIL') !== false && file_exists(_PS_IMG_DIR_.Configuration::get('PS_LOGO_MAIL', null, null, $id_shop)))
$logo = _PS_IMG_DIR_.Configuration::get('PS_LOGO_MAIL', null, null, $id_shop);
  else
  {
if (file_exists(_PS_IMG_DIR_.Configuration::get('PS_LOGO', null, null, $id_shop)))
 $logo = _PS_IMG_DIR_.Configuration::get('PS_LOGO', null, null, $id_shop);
else
 $template_vars['{shop_logo}'] = '';
  }
  /* don't attach the logo as */
  if (isset($logo)) {
$template_vars['src="{shop_logo}"'] = ' src="{shop_logo}" class="logo" ';
$template_vars['{shop_logo}'] = $message->attach(new Swift_Message_EmbeddedFile(new Swift_File($logo), null, ImageManager::getMimeTypeByExtension($logo)));
  }
  $template_vars['{shop_name}'] = Tools::safeOutput(Configuration::get('PS_SHOP_NAME', null, null, $id_shop));
  $template_vars['{shop_url}'] = Context::getContext()->link->getPageLink('index', true, Context::getContext()->language->id);
  $template_vars['{my_account_url}'] = Context::getContext()->link->getPageLink('my-account', true, Context::getContext()->language->id);
  $template_vars['{guest_tracking_url}'] = Context::getContext()->link->getPageLink('guest-tracking', true, Context::getContext()->language->id);
  $template_vars['{history_url}'] = Context::getContext()->link->getPageLink('history', true, Context::getContext()->language->id);
  $template_vars['{color}'] = Tools::safeOutput(Configuration::get('PS_MAIL_COLOR', null, null, $id_shop));
  $template_vars['</head>'] = '<style type="text/css">'.$css.'</style></head>';
  $swift->attachPlugin(new Swift_Plugin_Decorator(array($to_plugin => $template_vars)), 'decorator');
  if ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_TEXT)
$message->attach(new Swift_Message_Part($template_txt, 'text/plain', '8bit', 'utf-8'));
  if ($configuration['PS_MAIL_TYPE'] == Mail::TYPE_BOTH || $configuration['PS_MAIL_TYPE'] == Mail::TYPE_HTML)
$message->attach(new Swift_Message_Part($template_html, 'text/html', '8bit', 'utf-8'));
  if ($file_attachment && !empty($file_attachment))
  {
// Multiple attachments?
if (!is_array(current($file_attachment)))
 $file_attachment = array($file_attachment);
foreach ($file_attachment as $attachment)
 if (isset($attachment['content']) && isset($attachment['name']) && isset($attachment['mime']))
  $message->attach(new Swift_Message_Attachment($attachment['content'], $attachment['name'], $attachment['mime']));
  }
  /* Send mail */
  $send = $swift->send($message, $to, new Swift_Address($from, $from_name));
  $swift->disconnect();
  return $send;
 }
 catch (Swift_Exception $e) {
  return false;
 }
}
public static function sendMailTest($smtpChecked, $smtpServer, $content, $subject, $type, $to, $from, $smtpLogin, $smtpPassword, $smtpPort = 25, $smtpEncryption)
{
 $swift = null;
 $result = false;
 try
 {
  if ($smtpChecked)
  {
$smtp = new Swift_Connection_SMTP($smtpServer, $smtpPort, ($smtpEncryption == 'off') ?
 Swift_Connection_SMTP::ENC_OFF : (($smtpEncryption == 'tls') ? Swift_Connection_SMTP::ENC_TLS : Swift_Connection_SMTP::ENC_SSL));
$smtp->setUsername($smtpLogin);
$smtp->setpassword($smtpPassword);
$smtp->setTimeout(5);
$swift = new Swift($smtp, Configuration::get('PS_MAIL_DOMAIN'));
  }
  else
$swift = new Swift(new Swift_Connection_NativeMail(), Configuration::get('PS_MAIL_DOMAIN'));
  $message = new Swift_Message($subject, $content, $type);
  if ($swift->send($message, $to, $from))
$result = true;
  $swift->disconnect();
 }
 catch (Swift_ConnectionException $e)
 {
  $result = $e->getMessage();
 }
 catch (Swift_Message_MimeException $e)
 {
  $result = $e->getMessage();
 }
 return $result;
}
/**
 * This method is used to get the translation for email Object.
 * For an object is forbidden to use htmlentities,
 * we have to return a sentence with accents.
 *
 * @param string $string raw sentence (write directly in file)
 */
public static function l($string, $id_lang = null, Context $context = null)
{
 global $_LANGMAIL;
 if (!$context)
  $context = Context::getContext();
 $key = str_replace('\'', '\\\'', $string);
 if ($id_lang == null)
  $id_lang = (!isset($context->language) || !is_object($context->language)) ? (int)Configuration::get('PS_LANG_DEFAULT') : (int)$context->language->id;
 $iso_code = Language::getIsoById((int)$id_lang);
 $file_core = _PS_ROOT_DIR_.'/mails/'.$iso_code.'/lang.php';
 if (Tools::file_exists_cache($file_core) && empty($_LANGMAIL))
  include_once($file_core);
 $file_theme = _PS_THEME_DIR_.'mails/'.$iso_code.'/lang.php';
 if (Tools::file_exists_cache($file_theme))
  include_once($file_theme);
 if (!is_array($_LANGMAIL))
  return (str_replace('"', '"', $string));
 if (array_key_exists($key, $_LANGMAIL) && !empty($_LANGMAIL[$key]))
  $str = $_LANGMAIL[$key];
 else
  $str = $string;
 return str_replace('"', '"', stripslashes($str));
}
/* Rewrite of Swift_Message::generateId() without getmypid() */
protected static function generateId($idstring = null)
{
 $midparams =  array(
  "utctime" => gmstrftime("%Y%m%d%H%M%S"),
  "randint" => mt_rand(),
  "customstr" => (preg_match("/^(?<!\\.)[a-z0-9\\.]+(?!\\.)\$/iD", $idstring) ? $idstring : "swift") ,
  "hostname" => (isset($_SERVER["SERVER_NAME"]) ? $_SERVER["SERVER_NAME"] : php_uname("n")),
 );
 return vsprintf("<%s.%d.%[email protected]%s>", $midparams);
}

public function getCss() {
 $css = '';
 if (file_exists(_PS_MAIL_DIR_.'mail.css'))
  $css = file_get_contents(_PS_MAIL_DIR_.'mail.css');
 return $css;
}

}

 

there is a new function "getCss" that will read the content of your css file.

 

and 2 lines of code to use existing tags in the mail and replace it as if it is a template var to give a class to the logo image and embed the css file

 

$template_vars['</head>'] = '<style type="text/css">'.$css.'</style></head>';

 

this will replace the closing head tag in your mail with itself adding a style tag and your css file content

 

if (isset($logo)) {
			$template_vars['src="{shop_logo}"'] = ' src="{shop_logo}" class="logo" ';
			$template_vars['{shop_logo}'] = $message->attach(new Swift_Message_EmbeddedFile(new Swift_File($logo), null, ImageManager::getMimeTypeByExtension($logo)));
		}

 

and this optional one (i needed a class for the logo image) will give a glass to the logo image you can call inside your css file.

 

thats'it, now edit you mail.css and every single mail in your shop will get styled accordingly at once.

 

this would become much for useful if every mail and every module would start using css classes for tags, it would allow deeper customization and differentiation between mail but for now this is what i could do.

 

I'm willing to help if any developer is intrested in improving mail system for prestashop.

 

cheers.

 

NOTE: This is tested with prestashop 1.5 +

Edited by misthero (see edit history)

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  • 2 months later...

in line 282 you should see:

 

if (!$context)

$context = Context::getContext();

 

ie: if there is no context get the context

 

class Context is already defined in prestashop, that function is not modified from the core mail functions infact if you open the file Classes/Mail.php you will see the exact same function.

 

may you provide some more detail?

 

what are the steps you follow to get that error?

Edited by misthero (see edit history)

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Yes dear,

 

I am seeing this on line 282, there is calling of method getContext() of class Context but there is no class made with named "Context", so that it is showing error, i am using prestashop 1.4.10,

 

I made a file Mail.php and saved in override/classes/Mail.php

I made second file mail.css in mails/mail.css

 

I copied you code in Mail.php

 

I did these three steps only and it showed me fatal error,

 

Fatal error: Class 'Context' not found in override/classes/Mail.php on line 282

 

Faisal Naseer

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mm..

 

this is untested but you can try the following steps for 1.4:

 

1. copy your original Classes/mail.php to override/Classes/Mail.php

 

2. in the overrridden file replace around line32

class MailCore

with:

class Mail extends MailCore

 

3. around line 36 you should see something like this

 

$configuration = Configuration::getMultiple(array('PS_SHOP_EMAIL', 'PS_MAIL_METHOD', 'PS_MAIL_SERVER', 'PS_MAIL_USER', 'PS_MAIL_PASSWD', 'PS_SHOP_NAME', 'PS_MAIL_SMTP_ENCRYPTION', 'PS_MAIL_SMTP_PORT', 'PS_MAIL_TYPE'));

replace with:

$configuration = Configuration::getMultiple(array('PS_SHOP_EMAIL', 'PS_MAIL_METHOD', 'PS_MAIL_SERVER', 'PS_MAIL_USER', 'PS_MAIL_PASSWD', 'PS_SHOP_NAME', 'PS_MAIL_SMTP_ENCRYPTION', 'PS_MAIL_SMTP_PORT', 'PS_MAIL_TYPE'));
/*line added to parse css file */$css = Mail::getCss();

 

4. Around line 193 you should see

$templateVars['{shop_name}'] = Tools::safeOutput(Configuration::get('PS_SHOP_NAME'));
$templateVars['{shop_url}'] = Tools::getShopDomain(true, true).__PS_BASE_URI__;

replace it with this:

$templateVars['{shop_name}'] = Tools::safeOutput(Configuration::get('PS_SHOP_NAME'));
$templateVars['{shop_url}'] = Tools::getShopDomain(true, true).__PS_BASE_URI__;
$templateVars['</head>'] = '<StyLe type="text/css">'.$css.'</stYlE></head>';

 

 

 

5. Finally at the end of the file, before the calss closure add this function:

 

public static function getCss() {
	$css = '';
	if (file_exists(_PS_MAIL_DIR_.'mail.css'))
		$css = file_get_contents(_PS_MAIL_DIR_.'mail.css');
	return $css;
}

 

so that the end of your file now looks like this:

 

protected static function generateId($idstring = null)
{
$midparams = array(
"utctime" => gmstrftime("%Y%m%d%H%M%S"),
"randint" => mt_rand(),
"customstr" => (preg_match("/^(?<!\\.)[a-z0-9\\.]+(?!\\.)\$/iD", $idstring) ? $idstring : "swift") ,
"hostname" => (isset($_SERVER["SERVER_NAME"]) ? $_SERVER["SERVER_NAME"] : php_uname("n")),
);
return vsprintf("<%s.%d.%[email protected]%s>", $midparams);
}
public static function getCss() {
	$css = '';
	if (file_exists(_PS_MAIL_DIR_.'mail.css'))
		$css = file_get_contents(_PS_MAIL_DIR_.'mail.css');
	return $css;
}
}

 

test it and let me know, again it is untested but it should get the content of your mail.css and embedd in every mail you send

Edited by misthero (see edit history)

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