<?php
// $Id: system_module.module,v 1.4.2.3.2.5 2010-12-29 16:25:49 nancyw Exp $

/**
 * @file
 * Customize System Modules fieldsets
 */

function system_module_help($path, $args) {
  switch ($path) {
    case 'admin/build/modules':
      return drupal_get_form('system_module_temp_form');

    case 'admin/settings/util/sysmods':
      return l(t('Go to modules admin page'), 'admin/build/modules');
  }
}

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

function system_module_settings() {
  global $user;
  drupal_add_css(drupal_get_path('module', 'system_module') .'/system_module.css');

  // Get all available packages.
  $packages = $includes = array();
  $result = db_query("SELECT filename, name, info FROM {system} WHERE type = 'module'");
  while ($module = db_fetch_object($result)) {
    $module->info = unserialize($module->info);
    if (!isset($module->info['package']) || !$module->info['package']) {
      $module->info['package'] = t('Other');
    }
    $pkg = $module->info['package'];
    $packages[$pkg] = $pkg;
    $includes[$pkg][] = $module->info['name'];
  }
  ksort($packages);
  ksort($includes);

  // 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_collapse_all'] = array(
    '#type' => 'radios',
    '#title' => t('Collapse all by default'),
    '#description' => t('If you collapse all by default, new packages will be collapsed automatically unless you select them below.'),
    '#default_value' => variable_get('system_module_collapse_all', 0),
    '#options' => array(t('Expand all by default'), t('Collapse all by default')),
    );

  $form['list'] = array(
    '#type' => 'fieldset',
    '#title' => t('Available module packages'),
    '#description' => t('Check the box to reverse the default collapsed state above.'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
    );

  $form['list']['system_module_cfg'] = array(
    '#type' => 'checkboxes',
    '#default_value' => (isset($result) && is_array($result) ? array_keys($result) : array()),
    '#options' => $packages,
    );

  $form['dir'] = array(
    '#type' => 'fieldset',
    '#title' => t('Directory of package contents'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    );

  $rows = $list = array();
  $header = array(t('Package'), t('Includes'));
  foreach ($includes as $pkg => $modules) {
    $pkg_id = _system_modules_make_pkgid($pkg);
    $link = l($pkg, 'admin/build/modules', array('fragment' => "package-$pkg_id", 'query' => 'expand="'. $pkg .'"'));
    $rows[] = array(
      $link,
      implode(', ', $modules),
      );
    foreach ($modules as $name) {
      $list[] = "$name - $link";
    }
  }
  asort($list);
  $piece = ceil(count($list) / 3);
  $cols = array(array(
    theme('item_list', array_slice($list, 0, $piece)),
    theme('item_list', array_slice($list, $piece, $piece)),
    theme('item_list', array_slice($list, 2 * $piece)),
    ));

  $form['dir']['list'] = array(
    '#type' => 'markup',
    '#value' => theme('table', $header, $rows, array('id' => 'modules-by-package'))
      . theme('table', array(), $cols, array('id' => 'modules-by-name')),
    );

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

function system_module_settings_submit($form, &$form_state) {
  global $user;
  variable_set('system_module_collapse_all', $form_state['values']['system_module_collapse_all']);

  foreach ($form_state['values']['system_module_cfg'] as $index => $value) {
    if ($value === 0) {
      unset($form_state['values']['system_module_cfg'][$index]);
    }
  }

  $record = array('uid' => $user->uid, 'data' => serialize($form_state['values']['system_module_cfg']));
  if (db_result(db_query("SELECT 1 FROM {system_module_users} WHERE uid = %d", $user->uid))) {
    drupal_write_record('system_module_users', $record, 'uid');
  }
  else {
    drupal_write_record('system_module_users', $record);
  }

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

  drupal_set_message(t('Configuration saved'));
}

// 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.
      $form['#theme'] = 'system_modules_theme';
      $form['description']['system_module']['#value'] = l($form['description']['system_module']['#value'], 'admin/settings/util/sysmods');
      break;
  }
}

// @TODO: Doesn't the system already do this?
function system_module_disable() {
  drupal_rebuild_theme_registry();
}

function system_module_temp_form(&$form_state) {
  $form = array('#attributes' => array('class' => 'container-inline'));

  $form['perm'] = array(
    '#type' => 'submit',
    '#value' => t('Set Permanent State'),
    );

  $form['stuff'] = array(
    '#type' => 'markup',
    '#value' => ' ' . t('or temporarily') . ' ',
    );

  $form['expand'] = array(
    '#type' => 'submit',
    '#value' => t('Expand All'),
    );

  $form['collapse'] = array(
    '#type' => 'submit',
    '#value' => t('Collapse All'),
    );

  return $form;
}

function system_module_temp_form_submit($form, &$form_state) {
  $temp = '';
  switch ($form_state['values']['op']) {
    case t('Expand All'):
      $form_state['redirect'] = array('admin/build/modules', 'temp=expand');
      break;

    case t('Collapse All'):
      $form_state['redirect'] = array('admin/build/modules', 'temp=collapse');
      break;

    case t('Set Permanent State'):
      $form_state['redirect'] = array('admin/settings/util/sysmods');
      break;
  }
}

// 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.
  $mods = $form['validation_modules']['#value'];
  $packages = array();
  foreach ($mods as $module) {
    if (!isset($module->info['package']) || !$module->info['package']) {
      $module->info['package'] = t('Other');
    }
    $packages[$module->info['package']][$module->name] = $module->info;
    $project[$module->info['name']] = $module->info['project'];
  }
  ksort($packages);

  // Display packages.
  $output = '';
  $collapse_all = variable_get('system_module_collapse_all', 0);
  if (isset($_GET['temp'])) {
    $temp = array(t('expand'), t('collapse'));
    if (in_array($_GET['temp'], $temp)) {
      $collapse_all = array_search($_GET['temp'], $temp);
    }
    else {
      drupal_set_message(t('Invalid "temp" value ignored.'));
    }
  }

  $throttle_available = module_exists('throttle');

  $status_error_php = theme('image', 'misc/watchdog-error.png', t('incompatible'), t('Incompatible with this version of PHP'));

  $status_error_core = theme('image', 'misc/watchdog-error.png', t('incompatible'), t('Incompatible with this version of Drupal core'));

  $incompat_core = '<div class="incompatible">'. t('This version is incompatible with the !core_version version of Drupal core.', array('!core_version' => VERSION)) .'</div>';

  $incompat_php = '<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>';

  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++;
      }

      $row = array();
      $description = drupal_render($form['description'][$key]);
      if (isset($form['status']['#incompatible_modules_core'][$key])) {
        unset($form['status'][$key]);
        $status = $status_error_core;
        $description .= $incompat_core;
      }
      elseif (isset($form['status']['#incompatible_modules_php'][$key])) {
        unset($form['status'][$key]);
        $status = $status_error_php;
        $php_required = $form['status']['#incompatible_modules_php'][$key];
        if (substr_count($php_required, '.') < 2) {
          $php_required .= '.*';
        }
        $description .= $incompat_php;
      }
      else {
        $status = drupal_render($form['status'][$key]);
      }
      $row[] = array('data' => $status, 'align' => 'center');
      if ($throttle_available) {
        $row[] = array('data' => drupal_render($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;
    }

    // Here we influence the fieldset to be collapsed or expanded by default.
    if ($collapse_all) {
      $collapsed = (isset($user->system_module_cfg[$package]) ? FALSE : TRUE);
    }
    else {
      $collapsed = (isset($user->system_module_cfg[$package]) ? TRUE : FALSE);
    }
    // Is there an 'expand' request?
    if (isset($_GET['expand'])) {
      // Strip the quotes from the name.
      $expand = drupal_substr($_GET['expand'], 1, -1);
      if ($expand == $package) {
        $collapsed = FALSE;
      }
    }

    $fieldset = array(
      '#title' => $package .' ['. $enabled_count .'] of ['. sizeof($modules) .']',
      '#collapsible' => TRUE,
      '#collapsed' => $collapsed,
      '#attributes' => array('id' => 'package-'. _system_modules_make_pkgid($package)),
      '#value' => theme('table', $header, $rows, array('class' => 'package')),
    );
    $output .= theme('fieldset', $fieldset);
  }

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

/**
 * Build a package id for the fieldset.
 */
function _system_modules_make_pkgid($package) {
  if (strpos($package,'-')) {
    $package = str_replace(' ', '', $package);
  }
  return drupal_strtolower(form_clean_id($package));
}