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Mailto.php
141 lines (131 loc) · 4.48 KB
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Mailto.php
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<?php
namespace Smarty\FunctionHandler;
use Smarty\Template;
/**
* Smarty {mailto} function plugin
* Type: function
* Name: mailto
* Date: May 21, 2002
* Purpose: automate mailto address link creation, and optionally encode them.
* Params:
*
* - address - (required) - e-mail address
* - text - (optional) - text to display, default is address
* - encode - (optional) - can be one of:
* * none : no encoding (default)
* * javascript : encode with javascript
* * javascript_charcode : encode with javascript charcode
* * hex : encode with hexadecimal (no javascript)
* - cc - (optional) - address(es) to carbon copy
* - bcc - (optional) - address(es) to blind carbon copy
* - subject - (optional) - e-mail subject
* - newsgroups - (optional) - newsgroup(s) to post to
* - followupto - (optional) - address(es) to follow up to
* - extra - (optional) - extra tags for the href link
*
* Examples:
*
* {mailto address="me@domain.com"}
* {mailto address="me@domain.com" encode="javascript"}
* {mailto address="me@domain.com" encode="hex"}
* {mailto address="me@domain.com" subject="Hello to you!"}
* {mailto address="me@domain.com" cc="you@domain.com,they@domain.com"}
* {mailto address="me@domain.com" extra='class="mailto"'}
*
* @version 1.2
* @author Monte Ohrt <monte at ohrt dot com>
* @author credits to Jason Sweat (added cc, bcc and subject functionality)
*
* @param array $params parameters
*
* @return string
*/
class Mailto extends Base {
public function handle($params, Template $template) {
static $_allowed_encoding = [
'javascript' => true,
'javascript_charcode' => true,
'hex' => true,
'none' => true
];
$extra = '';
if (empty($params['address'])) {
trigger_error("mailto: missing 'address' parameter", E_USER_WARNING);
return;
} else {
$address = $params['address'];
}
$text = $address;
// netscape and mozilla do not decode %40 (@) in BCC field (bug?)
// so, don't encode it.
$mail_parms = [];
foreach ($params as $var => $value) {
switch ($var) {
case 'cc':
case 'bcc':
case 'followupto':
if (!empty($value)) {
$mail_parms[] = $var . '=' . str_replace(['%40', '%2C'], ['@', ','], rawurlencode($value));
}
break;
case 'subject':
case 'newsgroups':
$mail_parms[] = $var . '=' . rawurlencode($value);
break;
case 'extra':
case 'text':
$$var = $value;
// no break
default:
}
}
if ($mail_parms) {
$address .= '?' . join('&', $mail_parms);
}
$encode = (empty($params['encode'])) ? 'none' : $params['encode'];
if (!isset($_allowed_encoding[$encode])) {
trigger_error(
"mailto: 'encode' parameter must be none, javascript, javascript_charcode or hex",
E_USER_WARNING
);
return;
}
$string = '<a href="mailto:' . htmlspecialchars($address, ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401, \Smarty\Smarty::$_CHARSET) .
'" ' . $extra . '>' . htmlspecialchars($text, ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401, \Smarty\Smarty::$_CHARSET) . '</a>';
if ($encode === 'javascript') {
$js_encode = '';
for ($x = 0, $_length = strlen($string); $x < $_length; $x++) {
$js_encode .= '%' . bin2hex($string[$x]);
}
return '<script>document.write(unescape(\'' . $js_encode . '\'))</script>';
} elseif ($encode === 'javascript_charcode') {
for ($x = 0, $_length = strlen($string); $x < $_length; $x++) {
$ord[] = ord($string[$x]);
}
return '<script>document.write(String.fromCharCode(' . implode(',', $ord) . '))</script>';
} elseif ($encode === 'hex') {
preg_match('!^(.*)(\?.*)$!', $address, $match);
if (!empty($match[2])) {
trigger_error("mailto: hex encoding does not work with extra attributes. Try javascript.", E_USER_WARNING);
return;
}
$address_encode = '';
for ($x = 0, $_length = strlen($address); $x < $_length; $x++) {
if (preg_match('!\w!' . \Smarty\Smarty::$_UTF8_MODIFIER, $address[$x])) {
$address_encode .= '%' . bin2hex($address[$x]);
} else {
$address_encode .= $address[$x];
}
}
$text_encode = '';
for ($x = 0, $_length = strlen($text); $x < $_length; $x++) {
$text_encode .= '&#x' . bin2hex($text[$x]) . ';';
}
$mailto = "mailto:";
return '<a href="' . $mailto . $address_encode . '" ' . $extra . '>' . $text_encode . '</a>';
} else {
// no encoding
return $string;
}
}
}