<?php


function system_module_menu() {
  $menu['admin/settings/util/sysmods'] = array(
    'title'          => 'System Modules Settings',
    'description'    => 'Customize System Modules fieldsets.',
    'page callback'  => 'drupal_get_form',
    'page arguments' => array('system_module_settings'),
  );
  return $menu;
}

function system_module_settings() {
  global $user;
  //get all available packages
  $modules = module_rebuild_cache();
  foreach ($modules as $module) {
    if (!isset($module->info['package']) || !$module->info['package']) {
      $module->info['package'] = t('Other');
    }
    $packages[$module->info['package']] = $module->info['package'];
  }
  ksort($packages);
  //build settings form

 $result = db_fetch_array(db_query("SELECT data FROM {system_module_users} WHERE uid = %d}", $user->uid));
 $result = unserialize($result['data']);


  $form['system_module_cfg'] = array(
    '#type' => 'checkboxes',
    '#description' => t('Check the box if you want that package to be collapsed in <a href="@url">system modules</a> page, uncheck to expand', array('@url' => url('admin/build/modules'))),
    '#default_value' => (isset($result) && is_array($result)?array_keys($result):array()),
    '#options' => $packages,
  );

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => 'Customize --->',
  );
  return $form;
}

function system_module_settings_submit($form, &$form_state) {
  global $user;
  $values = $form_state['values'];
  foreach ($values['system_module_cfg'] as $index => $value) {
    if ($value === 0) {
      unset($values['system_module_cfg'][$index]);
    }
  }
  //must replace this with drupal_write_record at a later date (once i figure out how to use it correctly!)
  db_query("REPLACE INTO {system_module_users} SET uid = %d, data = '%s'", $user->uid, serialize($values['system_module_cfg']));

  //save user settings
  user_save($user, array('system_module_cfg' => $values['system_module_cfg']));
}

// the theme registry
function system_module_theme() {
  return array(
    'system_modules_theme' => array(
      'arguments' => array('form' => null),
    ),
  );
}

function system_module_form_alter(&$form, $form_state, $form_id) {
  switch ($form_id) {
    case 'system_modules':
      //a neat idea to allow access to the important module settings directly from the modules page, saves page loads from navigting to site configuration etc etc.
      $form['#theme'] = 'system_modules_theme';
      $form['description']['system_module']['#value'] = t('<a href="@url">Set default</a> collapsed/expanded state for system modules fieldsets', array('@url' => url('admin/settings/util/sysmods')));
      break;
  }
}

function system_module_disable() {
  drupal_rebuild_theme_registry();
}

//most of this function was copied from system.module
function theme_system_modules_theme($form) {
  global $user;   //needed to enable
  if (isset($form['confirm'])) {
    return drupal_render($form);
  }

  // Individual table headers.
  $header = array(t('Enabled'));
  if (module_exists('throttle')) {
    $header[] = t('Throttle');
  }
  $header[] = t('Name');
  $header[] = t('Version');
  $header[] = t('Description');

  // Pull package information from module list and start grouping modules.
  $modules = $form['validation_modules']['#value'];
  foreach ($modules as $module) {
    if (!isset($module->info['package']) || !$module->info['package']) {
      $module->info['package'] = t('Other');
    }
    $packages[$module->info['package']][$module->name] = $module->info;
  }
  ksort($packages);

  // Display packages.
  $output = '';
  foreach ($packages as $package => $modules) {
    $rows = array();

    $enabled_count = 0;
    foreach ($modules as $key => $module) {
      if (isset($form['status'][$key]['#default_value']) && $form['status'][$key]['#default_value']) {
        $enabled_count++;
      }

//      drupal_set_message('<pre>'. print_r($form['status'][$key], 1) .'</pre>');
      $row = array();
      $description = drupal_render($form['description'][$key]);
      if (isset($form['status']['#incompatible_modules_core'][$key])) {
        unset($form['status'][$key]);
        $status = theme('image', 'misc/watchdog-error.png', t('incompatible'), t('Incompatible with this version of Drupal core'));
        $description .= '<div class="incompatible">'. t('This version is incompatible with the !core_version version of Drupal core.', array('!core_version' => VERSION)) .'</div>';
      }
      elseif (isset($form['status']['#incompatible_modules_php'][$key])) {
        unset($form['status'][$key]);
        $status = theme('image', 'misc/watchdog-error.png', t('incompatible'), t('Incompatible with this version of PHP'));
        $php_required = $form['status']['#incompatible_modules_php'][$key];
        if (substr_count($php_required, '.') < 2) {
          $php_required .= '.*';
        }
        $description .= '<div class="incompatible">'. t('This module requires PHP version @php_required and is incompatible with PHP version !php_version.', array('@php_required' => $php_required, '!php_version' => phpversion())) .'</div>';
      }
      else {
        $status = drupal_render($form['status'][$key]);
      }
      $row[] = array('data' => $status, 'align' => 'center');
      if (module_exists('throttle')) {
        $row[] = array('data' => drupal_render($form['throttle'][$key]), 'align' => 'center');
      }
      $row[] = '<strong>'. drupal_render($form['name'][$key]) .'</strong>';
      $row[] = drupal_render($form['version'][$key]);
      $row[] = array('data' => $description, 'class' => 'description');
      $rows[] = $row;
    }
    $fieldset = array(
      '#title' => $package .' ['. $enabled_count .'] of ['. sizeof($modules) .']',
      '#collapsible' => TRUE,
      '#collapsed' => (isset($user->system_module_cfg[$package])? true:false), //here we influence the fieldset to be collapsed or expanded by default.
      '#value' => theme('table', $header, $rows, array('class' => 'package')),
    );
    $output .= theme('fieldset', $fieldset);
  }

  $output .= drupal_render($form);
  return $output;
}