<?php

abstract class Qs_Sys_View_Helper_FormTime extends Zend_View_Helper_FormElement
{
    protected $_params = array(
        'format'          =>  'g:i A',
        'minutesInterval' =>  15,
        'minuteOptions'   =>  array(),
        'required'        =>  false,
        'emptyOptions'    =>  false,
        'smartOptions'    =>  true,
    );
    protected function _getInfo($name, $value = null, $attribs = null,
        $options = null, $listsep = null)
    {
        $info = parent::_getInfo($name, $value, $attribs, $options, $listsep);
        foreach ($this->_params as $paramName => $paramValue) {
            if (isset($info['attribs'][$paramName])) {
                $info[$paramName] = $info['attribs'][$paramName];
                unset($info['attribs'][$paramName]);
            } else {
                $info[$paramName] = $paramValue;
            }
        }
        foreach (array_keys($info) as $key) {
            if (isset($info['attribs'][$key])) {
                unset($info['attribs'][$key]);
            }
        }
        return $info;
    }

    protected function _getValuePart($part, $value)
    {
        if (false == ($time = strtotime($value))) {
            return null;
        }
        return date($part, $time);
    }

    public function formTime($name, $value = null, $attribs = null)
    {
        $info = $this->_getInfo($name, $value, $attribs);
        extract($info);
        $content = '';
        $formatChars = str_split($format);
        foreach ($formatChars as $char) {
            switch ($char) {
                case 'H':
                    $hours = 0;
                    while ($hours < 24) {
                        $options[sprintf('%02d', $hours)] = sprintf('%02d', $hours);
                        $hours++;
                    }
                    break;
                case 's':
                    $seconds = 0;
                    while ($seconds < 60) {
                        $options[sprintf('%02d', $minutes)] = sprintf('%02d', $seconds);
                        $seconds++;
                    }
                    break;
                case 'g':
                    $options = array_keys(array_fill(1, 12, ''));
                    $options = array_combine($options, $options);
                    break;
                case 'i':
                    if (empty($minuteOptions)) {
                        $options = array();
                        $minutes = 0;
                        while ($minutes < 60) {
                            $options[sprintf('%02d', $minutes)] = sprintf('%02d', $minutes);
                            $minutes+= $minutesInterval;
                        }
                    } else {
                        $options = $minuteOptions;
                    }
                    $_value = $this->_getValuePart($char, $value);
                    if ($_value && !array_key_exists($_value, $options) && $smartOptions) {
                        $options[$_value] = $_value;
                        ksort($options);
                    }
                    break;
                case 'a':
                case 'A':
                    if ($char == 'a') {
                        $options = array('am' => 'am', 'pm' => 'pm');
                    } else {
                        $options = array('AM' => 'AM', 'PM' => 'PM');
                    }
                    break;
                default:
                    $content .= $char;
                    continue 2;
            }
            $_value = $this->_getValuePart($char, $value);
            $_attribs = array('class' => 'time_' . $char);
            if (!$required || $emptyOptions) {
                $options = array('' => '') + (array) $options;
            }
            $content .= $this->view->formSelect("{$name}[{$char}]", $_value, $_attribs, $options);
        }
        return $content;
    }
}