<?php
// $Id: jscalendar.module,v 1.15 2007-01-25 19:53:06 nedjo Exp $

/**
 * @file
 * Provide popup calendar.
 *
 * Usage:
 *
 * <code>
 * $form['date'] = array(
 *   '#type' => 'textfield',
 *   '#attributes' => array('class' => 'jscalendar')
 * );
 *
 * // Optionally, set startup parameters.
 * // E.g., don't show time.
 * $form['#jscalendar_showsTime'] = 'false';
 * </code>
 */

/**
 * Implementation of hook_menu()
 */
function jscalendar_menu($may_cache){
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/settings/jscalendar',
      'title' => t('JS Calendar'),
      'description' => t('Configurations for the popup calendar'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('jscalendar_admin_settings')
    );
    
  }
  return $items;
}

/**
 * Implementation of hook_form_alter().
 */
function jscalendar_form_alter($form_id, &$form) {
  if ($form_id == 'comment_form' && isset($form['admin']) && isset($form['admin']['date'])) {
    $form['admin']['date']['#attributes'] = array('class' => 'jscalendar');
  }
  elseif (isset($form['type']) && $form['type']['#value'] .'_node_form' == $form_id && isset($form['author']) && isset($form['author']['date'])) {
    $form['author']['date']['#attributes'] = array('class' => 'jscalendar');
  }
  foreach (element_children($form) as $key) {
    if (isset($form[$key]) && isset($form[$key]['#attributes']) && isset($form[$key]['#attributes']['class']) && !(strpos($form[$key]['#attributes']['class'], 'jscalendar') === FALSE)) {
      jscalendar_load();
      $settings = array('ifFormat', 'showsTime', 'timeFormat');
      foreach ($settings as $setting) {
        if (isset($form[$key]['#jscalendar_' . $setting])) {
          $form[$key.'_jscalendar']['#tree'] = TRUE;
          $form[$key.'_jscalendar'][$setting] = array(
            '#type' => 'hidden',
            '#value' => $form[$key]['#jscalendar_' . $setting]
          );
          unset($form[$key]['#jscalendar_' . $setting]);
        }
      }
    }
    // If necessary, recurse through all children.
    jscalendar_form_alter($form_id, $form[$key]);
  }
}

/**
 * Menu callback for admin settings.
 */
function jscalendar_admin_settings() {
  $form['jscalendar_css'] = array(
    '#type' => 'select',
    '#title' => t('JSCalendar style'),
    '#description' => t('Choose the JSCalendar style.'),
    '#default_value' => variable_get('jscalendar_css', NULL),
    '#options' => jscalendar_available_styles(),
  );
  $form = system_settings_form($form);
  return $form;
}

/**
 * Search recursively for any CSS file.
 */
function jscalendar_available_styles($dir = NULL) {
  $path = drupal_get_path('module', 'jscalendar');
  $files = file_scan_directory($path, '\.css$');
  foreach ($files as $file) {
    if ($file->basename != 'jscalendar.css') {
      if ($file->basename == 'theme.css') {
        $file->name = str_replace(array($path .'/lib/skins/', '/theme.css'), '', $file->filename);
      }
      $jscalendar_styles[$file->filename] = $file->name;
    }
  }
  return $jscalendar_styles;
}

/**
 * Load needed files.
 */
function jscalendar_load($lib_locale = NULL) {
  global $locale;
  static $loaded = FALSE;

  if ($loaded) {
    return;
  }

  // If the locale library hasn't been explicitly set, we look for support for the current locale.
  if (empty($lib_locale)) {
    // Supported directly.
    if (in_array($locale, array('af', 'bg', 'ca', 'da', 'de', 'el', 'es', 'fi', 'fr', 'he', 'hu', 'id', 'is', 'it', 'ja', 'kn', 'ko', 'lt', 'nl', 'pl', 'ro', 'ru', 'sk', 'sv', 'tr'))) {
      $lib_locale = $locale;
    }
    // Supported indirectly.
    else if ($locale == 'cs') {
       $lib_locale = 'cs-utf8';
    }
    else if ($lib_locale == 'he') {
       $lib_locale = 'he-utf8';
    }
    else if (($locale == 'pt-br') || ($locale == 'pt-pt')) {
       $lib_locale = 'pt';
    }
    else if (($locale == 'zh-hans') || ($locale == 'zh-hant')) {
       $lib_locale = 'zh';
    }
    // Not supported, default to 'en'.
    else {
      $lib_locale = 'en';
    }
  }
  $path = drupal_get_path('module', 'jscalendar');
  drupal_add_js($path . '/lib/calendar_stripped.js');
  drupal_add_js($path . '/lib/calendar-setup_stripped.js');
  drupal_add_js($path . '/lib/lang/calendar-' . $lib_locale . '.js');
  drupal_add_js($path . '/jscalendar.js');
  drupal_add_css($path .'/jscalendar.css');
  drupal_add_css(variable_get('jscalendar_css', $path .'/lib/skins/aqua/theme.css'));
  $loaded = TRUE;
}