<?php

/**
 * Plugin from smarty project and adapted for jtpl.
 *
 * @link http://smarty.php.net/manual/en/language.function.mailto.php {mailto}
 *          (Smarty online manual)
 * @link http://jelix.org/
 *
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @contributor Jason Sweat (added cc, bcc and subject functionality), Julien Issler
 *
 * @copyright 2011 Julien Issler
 */

/**
 * Examples:
 * <pre>
 * {mailto array("address"=>"me@domain.com")}
 * {mailto array("address"=>"me@domain.com","encode"=>"javascript")}
 * {mailto array("address"=>"me@domain.com","encode"=>"hex")}
 * {mailto array("address"=>"me@domain.com","subject"=>"Hello to you!")}
 * {mailto array("address"=>"me@domain.com","cc"=>"you@domain.com,they@domain.com")}
 * {mailto array("address"=>"me@domain.com","extra"=>'class="mailto"')}
 * </pre>.
 *
 * @params \Jelix\Castor\CastorCore $tpl
 * @params array $params
 */
function jtpl_function_html_mailto(\Jelix\Castor\CastorCore $tpl, $params)
{
    $extra = '';

    if (empty($params['address'])) {
        throw $tpl->getInternalException('errors.tplplugin.function.argument.unknown', array('address', 'mailto', $tpl->_templateName));
    } else {
        $address = $params['address'];
    }

    $text = $address;

    // netscape and mozilla do not decode %40 (@) in BCC field (bug?)
    // so, don't encode it.
    $search = array('%40', '%2C');
    $replace = array('@', ',');
    $mail_parms = array();
    foreach ($params as $var => $value) {
        switch ($var) {
            case 'cc':
            case 'bcc':
            case 'followupto':
                if (!empty($value)) {
                    $mail_parms[] = $var.'='.str_replace($search, $replace, rawurlencode($value));
                }
                break;

            case 'subject':
            case 'newsgroups':
                $mail_parms[] = $var.'='.rawurlencode($value);
                break;

            case 'extra':
            case 'text':
                $$var = $value;

            default:
        }
    }

    $mail_parm_vals = '';
    for ($i = 0; $i < count($mail_parms); ++$i) {
        $mail_parm_vals .= (0 == $i) ? '?' : '&';
        $mail_parm_vals .= $mail_parms[$i];
    }
    $address .= $mail_parm_vals;

    $encode = (empty($params['encode'])) ? 'none' : $params['encode'];
    if (!in_array($encode, array('javascript', 'javascript_charcode', 'hex', 'none'))) {
        throw $tpl->getInternalException('errors.tplplugin.function.argument.unknown', array($encode, 'mailto', $tpl->_templateName));
    }

    if ($encode == 'javascript') {
        $string = 'document.write(\'<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>\');';

        $js_encode = '';
        for ($x = 0; $x < strlen($string); ++$x) {
            $js_encode .= '%'.bin2hex($string[$x]);
        }

        echo '<script type="text/javascript">//<![CDATA[
eval(unescape(\''.$js_encode.'\')); //]]>
</script>';
    } elseif ($encode == 'javascript_charcode') {
        $string = '<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>';

        for ($x = 0, $y = strlen($string); $x < $y; ++$x) {
            $ord[] = ord($string[$x]);
        }

        $_ret = "<script type=\"text/javascript\">\n";
        $_ret .= "//<![CDATA[\n";
        $_ret .= '{document.write(String.fromCharCode(';
        $_ret .= implode(',', $ord);
        $_ret .= '))';
        $_ret .= "}\n";
        $_ret .= "//]]>\n";
        $_ret .= "</script>\n";

        echo $_ret;
    } elseif ($encode == 'hex') {
        preg_match('!^(.*)(\?.*)$!', $address, $match);
        if (!empty($match[2])) {
            throw $tpl->getInternalException('errors.tplplugin.function.argument.unknown', array($match[2], ' ', ' '));
        }
        $address_encode = '';
        for ($x = 0; $x < strlen($address); ++$x) {
            if (preg_match('!\w!', $address[$x])) {
                $address_encode .= '%'.bin2hex($address[$x]);
            } else {
                $address_encode .= $address[$x];
            }
        }
        $text_encode = '';
        for ($x = 0; $x < strlen($text); ++$x) {
            $text_encode .= '&#x'.bin2hex($text[$x]).';';
        }

        $mailto = '&#109;&#97;&#105;&#108;&#116;&#111;&#58;';
        echo '<a href="'.$mailto.$address_encode.'" '.$extra.'>'.$text_encode.'</a>';
    } else {
        // no encoding
        echo '<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>';
    }
}
