<?php

/**

 * Smarty plugin

 * @package Smarty

 * @subpackage plugins

 */

/**

 * Smarty {mailto} function plugin

 *

 * Type:     function<br>

 * Name:     mailto<br>

 * Date:     May 21, 2002

 * Purpose:  automate mailto address link creation, and optionally

 *           encode them.<br>

 * Input:<br>

 *         - address = 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 hexidecimal (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:

 * <pre>

 * {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"'}

 * </pre>

 * @link http://smarty.php.net/manual/en/language.function.mailto.php {mailto}

 *          (Smarty online manual)

 * @version  1.2

 * @author   Monte Ohrt <monte at ohrt dot com>

 * @author   credits to Jason Sweat (added cc, bcc and subject functionality)

 * @param    array

 * @param    Smarty

 * @return   string

 */

function smarty_function_mailto($params, &$smarty)

{

    $extra = '';

    if (empty($params['address'])) {

        $smarty->trigger_error("mailto: missing 'address' parameter");

        return;

    } 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')) ) {

        $smarty->trigger_error("mailto: 'encode' parameter must be none, javascript or hex");

        return;

    }

    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]);

        }

        return '<script type="text/javascript">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\" language=\"javascript\">\n";

        $_ret .= "<!--\n";

        $_ret .= "{document.write(String.fromCharCode(";

        $_ret .= implode(',',$ord);

        $_ret .= "))";

        $_ret .= "}\n";

        $_ret .= "//-->\n";

        $_ret .= "</script>\n";

        return $_ret;

    } elseif ($encode == 'hex') {

        preg_match('!^(.*)(\?.*)$!',$address,$match);

        if(!empty($match[2])) {

            $smarty->trigger_error("mailto: hex encoding does not work with extra attributes. Try javascript.");

            return;

        }

        $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 = "mailto:";

        return '<a href="'.$mailto.$address_encode.'" '.$extra.'>'.$text_encode.'</a>';

    } else {

        // no encoding

        return '<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>';

    }

}

/* vim: set expandtab: */

?>