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  // Only show variants for installed libraries.

  $header_installed = array(t('Name'), t('Version'), t('Variants'), t('Dependencies'), t('Provider'), t('Links'));

  // Only show status for libraries with an error.

  $header_error = array(t('Name'), t('Status'), t('Version'), t('Dependencies'), t('Provider'), t('Links'));

  // For unregistered libraries the only information we can show is the path.

  $header_unregistered = array(t('Name'), t('Path'));

  $rows_installed = array();

  $rows_error = array();

  $rows_unregistered = array();

  // Registered libraries: we prefer to use libraries_detect() since it provides

  // library metadata.

  $libraries_registered = libraries_detect();

  uasort($libraries_registered, 'libraries_admin_sort_title');

  // Unregistered libraries: modules can depend on Libraries API without sharing

  // metadata by using libraries_get_path(). Libraries can also be placed in the

  // filesystem that are incorrectly installed, a wrong version, or a standalone

  // not connected to any module. In these cases, libraries_get_libraries()

  // provides a full library list. Libraries found by libraries_get_libraries(),

  // but not identified by libraries_detect, are displayed in a separate table.

  $libraries_unregistered = libraries_get_libraries();

  natcasesort($libraries_unregistered);

  foreach ($libraries_registered as $machine_name => $library) {

    $row = array();

      $actions[] = l(t('Homepage'), $library['vendor url']);

      $actions[] = l(t('Download'), $library['download url']);

    }

    $row['data'][] = l($library['name'], 'admin/reports/libraries/' . $machine_name);

    // Only show status for libraries with an error. See above.

    if (!$library['installed']) {

      $row['data'][] = drupal_ucfirst($library['error']);

    }

    $row['data'][] = isset($library['version']) ? $library['version'] : '';

    if ($library['installed']) {

      $row['data'][] = implode(', ', array_keys($library['variants']));

    }

    $row['data'][] = libraries_admin_get_dependencies($library);

    $row['data'][] = libraries_admin_get_provider_with_type($library);

    $row['data'][] = implode(' | ', $actions);

    $row['class'] = $library['installed'] ? array('ok') : array('warning');

    if ($library['installed']) {

      $rows_installed[] = $row;

    else {

      $rows_error[] = $row;

    }

    // Filter registered libraries from unregistered libraries.

    unset($libraries_unregistered[$library['machine name']]);

  }

  // Build table of registered libraries with installed status.

  $form['libraries']['installed'] = array(

    '#theme' => 'libraries_table_with_title',

    '#title' => t('Installed'),

    '#header' => $header_installed,

    '#rows' => $rows_installed,

    '#description' => t('These libraries are registered and installed correctly.'),

    '#empty' => t('There are currently no libraries that are registered and installed.'),

  );

  // Build table of registered libraries with error status.

  $form['libraries']['error'] = array(

    '#theme' => 'libraries_table_with_title',

    '#title' => t('Uninstalled'),

    '#header' => $header_error,

    '#rows' => $rows_error,

    '#description' => t('These libraries are registered but not installed. They may not need to be installed in case a module or theme provides optional integration with a library.'),

    '#empty' => t('There are currently no libraries that are registered but not installed.'),

  );

  // Build table of unregistered libraries.

  foreach ($libraries_unregistered as $name => $path) {

    $rows_unregistered[] = array(

        $name,

        $path,

  $form['libraries']['unregistered'] = array(

    '#theme' => 'libraries_table_with_title',

    '#title' => t('Unregistered'),

    '#header' => $header_unregistered,

    '#rows' => $rows_unregistered,

    '#description' => t('These libraries were found in the filesystem but there is no metadata about them.'),

    // Do not show the table at all, if there are no unregistered libraries.

    '#access' => (bool) $libraries_unregistered,

  // Clear the cached library information so that the library can be loaded if

  // it was just downloaded. Because these instructions use libraries_detect()

  // directly, they will never use the cached information, but this avoids the

  // overview showing a library as installed but it not being loadable.

  libraries_cache_clear();

        $form['instructions']['instruction']['#markup'] = t('There is a missing dependency in your configuration that prevents this library from working properly.') . '<br>';

        $form['instructions']['instruction']['#markup'] = t('There is an incompatible dependency in your configuration that prevents this library from working properly.') . '<br>';

/**

 * Returns the library's dependencies, if any.

 *

 * @param array $library

 *   A library information array.

 *

 * @return string

 *   The dependencies.

 */

function libraries_admin_get_dependencies($library) {

  $dependencies = array();

  foreach ($library['dependencies'] as $dependency_name) {

    if ($dependency = libraries_info($dependency_name)) {

      $dependencies[] = $dependency['name'];

    }

    else {

      $dependencies[] = $dependency_name;

    }

  }

  return implode(', ', $dependencies);

}