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<?php
/**
 * Smarty plugin
 * 
 * @package Smarty
 * @subpackage PluginsFunction
 */

/**
 * Smarty {html_options} function plugin
 * 
 * Type:     function<br>
 * Name:     html_options<br>
 * Purpose:  Prints the list of <option> tags generated from
 *            the passed parameters
 * 
 * @link http://smarty.php.net/manual/en/language.function.html.options.php {html_image}
 *      (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com> 
 * @param array $params parameters
 * Input:<br>
 *            - name       (optional) - string default "select"
 *            - values     (required if no options supplied) - array
 *            - options    (required if no values supplied) - associative array
 *            - selected   (optional) - string default not set
 *            - output     (required if not options supplied) - array
 * @param object $template template object
 * @return string 
 * @uses smarty_function_escape_special_chars()
 */
function smarty_function_html_options($params, $template)
{
    require_once(SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php');

    $name = null;
    $values = null;
    $options = null;
    $selected = array();
    $output = null;

    $extra = '';

    foreach($params as $_key => $_val) {
        switch ($_key) {
            case 'name':
                $$_key = (string)$_val;
                break;

            case 'options':
                $$_key = (array)$_val;
                break;

            case 'values':
            case 'output':
                $$_key = array_values((array)$_val);
                break;

            case 'selected':
                $$_key = array_map('strval', array_values((array)$_val));
                break;

            default:
                if (!is_array($_val)) {
                    $extra .= ' ' . $_key . '="' . smarty_function_escape_special_chars($_val) . '"';
                } else {
                    trigger_error("html_options: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
                } 
                break;
        } 
    } 

    if (!isset($options) && !isset($values))
        return '';
    /* raise error here? */

    $_html_result = '';

    if (isset($options)) {
        foreach ($options as $_key => $_val)
        $_html_result .= smarty_function_html_options_optoutput($_key, $_val, $selected);
    } else {
        foreach ($values as $_i => $_key) {
            $_val = isset($output[$_i]) ? $output[$_i] : '';
            $_html_result .= smarty_function_html_options_optoutput($_key, $_val, $selected);
        } 
    } 

    if (!empty($name)) {
        $_html_result = '<select name="' . $name . '"' . $extra . '>' . "\n" . $_html_result . '</select>' . "\n";
    } 

    return $_html_result;
} 

function smarty_function_html_options_optoutput($key, $value, $selected)
{
    if (!is_array($value)) {
        $_html_result = '<option value="' .
        smarty_function_escape_special_chars($key) . '"';
        if (in_array((string)$key, $selected))
            $_html_result .= ' selected="selected"';
        $_html_result .= '>' . smarty_function_escape_special_chars($value) . '</option>' . "\n";
    } else {
        $_html_result = smarty_function_html_options_optgroup($key, $value, $selected);
    } 
    return $_html_result;
} 

function smarty_function_html_options_optgroup($key, $values, $selected)
{
    $optgroup_html = '<optgroup label="' . smarty_function_escape_special_chars($key) . '">' . "\n";
    foreach ($values as $key => $value) {
        $optgroup_html .= smarty_function_html_options_optoutput($key, $value, $selected);
    } 
    $optgroup_html .= "</optgroup>\n";
    return $optgroup_html;
} 

?>