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<?php

/**

 * @file

 * Provide a tool for creating UIs for exportable objects.

 *

 * See Advanced Help for documentation.

 */

/**

 * Process an export-ui plugin to provide it with defaults.

 */

function ctools_export_ui_process(&$plugin, $info) {

  ctools_include('export');

  $plugin += array(

    'has menu' => TRUE,

    'title' => $plugin['name'],

    'export' => array(),

    'allowed operations' => array(),

    'menu' => array(),

    'redirect' => array(),

    'form' => array(),

    'strings' => array(),

    'list' => NULL,

    'access' => 'administer site configuration',

  );

  // Provide CRUD access defaults based on the base 'access' setting:

  $plugin += array(

    'create access' => $plugin['access'],

    'delete access' => $plugin['access'],

  );

  if (empty($plugin['has menu'])) {

    return;

  }

  // The following keys are required and the plugin cannot be processed

  // without them.

  $keys = array(

    'title singular',

    'title plural',

    'title singular proper',

    'title plural proper',

    'schema',

  );

  foreach ($keys as $key) {

    if (empty($plugin[$key])) {

      drupal_set_message(t('The plugin definition of @plugin is missing the %key key.', array('%key' => $key, '@plugin' => $plugin['name'])), 'error');

    }

  }

  // If we're on the modules page and building a menu, there is a design flaw

  // in Drupal core that causes modules to be installed but the schema does

  // not become available until AFTER menu rebuild. This helps smooth that

  // out. This is a HACK but it should work:

  $schema = ctools_export_get_schema($plugin['schema']);

  if (empty($schema)) {

    // If we're updating the schema may not have been read yet, so don't report this error in that case.

    if (!defined('MAINTENANCE_MODE')) {

      drupal_set_message(t('The plugin definition of @plugin cannot locate schema %schema.', array('%schema' => $plugin['schema'], '@plugin' => $plugin['name'])), 'error');

    }

    return;

  }

  if (empty($schema['export'])) {

    drupal_set_message(t('The plugin definition of @plugin uses %schema, but it has no export section.', array('%schema' => $plugin['schema'], '@plugin' => $plugin['name'])), 'error');

    return;

  }

  $plugin['export'] += $schema['export'];

  $plugin['export'] += array(

    // Add the identifier key from the schema so we don't have to call

    // ctools_export_get_schema() just for that.

    'key' => $schema['export']['key'],

  );

  // Add some default fields that appear often in exports

  // If these use different keys they can easily be specified in the

  // $plugin.

  if (empty($plugin['export']['admin_title']) && !empty($schema['fields']['admin_title'])) {

    $plugin['export']['admin_title'] = 'admin_title';

  }

  if (empty($plugin['export']['admin_description']) && !empty($schema['fields']['admin_description'])) {

    $plugin['export']['admin_description'] = 'admin_description';

  }

  // Define allowed operations, and the name of the operations.

  $plugin['allowed operations'] += array(

    'edit'    => array('title' => t('Edit')),

    'enable'  => array('title' => t('Enable'), 'ajax' => TRUE, 'token' => TRUE),

    'disable' => array('title' => t('Disable'), 'ajax' => TRUE, 'token' => TRUE),

    'revert'  => array('title' => t('Revert')),

    'delete'  => array('title' => t('Delete')),

    'clone'   => array('title' => t('Clone')),

    'import'  => array('title' => t('Import')),

    'export'  => array('title' => t('Export')),

  );

  $plugin['menu'] += array(

    'menu item' => str_replace(' ', '-', $plugin['name']),

    'menu prefix' => 'admin/structure',

    'menu title' => $plugin['title'],

    'menu description' => '',

  );

  $base_path = ctools_export_ui_plugin_base_path($plugin);

  $prefix_count = count(explode('/', $plugin['menu']['menu prefix']));

  $plugin['menu'] += array(

    // Default menu items that should be declared.

    'items' => array(),

  );

  $plugin['menu']['items'] += array(

    'list callback' => array(),

    'list' => array(),

    'add' => array(),

    'edit callback' => array(),

    'edit' => array(),

  );

  $plugin['menu']['items']['list callback'] += array(

    'path' => '',

    // Menu items are translated by the menu system.

    // TODO: We need more flexibility in title. The title of the admin page

    // is not necessarily the title of the object, plus we need

    // plural, singular, proper, not proper, etc.

    'title' => $plugin['menu']['menu title'],

    'description' => $plugin['menu']['menu description'],

    'page callback' => 'ctools_export_ui_switcher_page',

    'page arguments' => array($plugin['name'], 'list'),

    'access callback' => 'ctools_export_ui_task_access',

    'access arguments' => array($plugin['name'], 'list'),

    'type' => MENU_NORMAL_ITEM,

  );

  $plugin['menu']['items']['list'] += array(

    'path' => 'list',

    'title' => 'List',

    'page callback' => 'ctools_export_ui_switcher_page',

    'page arguments' => array($plugin['name'], 'list'),

    'access callback' => 'ctools_export_ui_task_access',

    'access arguments' => array($plugin['name'], 'list'),

    'type' => MENU_DEFAULT_LOCAL_TASK,

    'weight' => -10,

  );

  $plugin['menu']['items']['add'] += array(

    'path' => 'add',

    'title' => 'Add',

    'page callback' => 'ctools_export_ui_switcher_page',

    'page arguments' => array($plugin['name'], 'add'),

    'access callback' => 'ctools_export_ui_task_access',

    'access arguments' => array($plugin['name'], 'add'),

    'type' => MENU_LOCAL_ACTION,

  );

  $plugin['menu']['items']['edit callback'] += array(

    'path' => 'list/%ctools_export_ui',

    'page callback' => 'ctools_export_ui_switcher_page',

    'page arguments' => array($plugin['name'], 'edit', $prefix_count + 2),

    'load arguments' => array($plugin['name']),

    'access callback' => 'ctools_export_ui_task_access',

    'access arguments' => array($plugin['name'], 'edit', $prefix_count + 2),

    'type' => MENU_CALLBACK,

  );

  $plugin['menu']['items']['edit'] += array(

    'path' => 'list/%ctools_export_ui/edit',

    'title' => 'Edit',

    'page callback' => 'ctools_export_ui_switcher_page',

    'page arguments' => array($plugin['name'], 'edit', $prefix_count + 2),

    'load arguments' => array($plugin['name']),

    'access callback' => 'ctools_export_ui_task_access',

    'access arguments' => array($plugin['name'], 'edit', $prefix_count + 2),

    'type' => MENU_DEFAULT_LOCAL_TASK,

    'weight' => -10,

  );

  if ($plugin['allowed operations']['import']) {

    $plugin['menu']['items'] += array('import' => array());

    $plugin['menu']['items']['import'] += array(

      'path' => 'import',

      'title' => 'Import',

      'page callback' => 'ctools_export_ui_switcher_page',

      'page arguments' => array($plugin['name'], 'import'),

      'access callback' => 'ctools_export_ui_task_access',

      'access arguments' => array($plugin['name'], 'import'),

      'type' => MENU_LOCAL_ACTION,

    );

  }

  if ($plugin['allowed operations']['export']) {

    $plugin['menu']['items'] += array('export' => array());

    $plugin['menu']['items']['export'] += array(

      'path' => 'list/%ctools_export_ui/export',

      'title' => 'Export',

      'page callback' => 'ctools_export_ui_switcher_page',

      'page arguments' => array($plugin['name'], 'export', $prefix_count + 2),

      'load arguments' => array($plugin['name']),

      'access callback' => 'ctools_export_ui_task_access',

      'access arguments' => array($plugin['name'], 'export', $prefix_count + 2),

      'type' => MENU_LOCAL_TASK,

    );

  }

  if ($plugin['allowed operations']['revert']) {

    $plugin['menu']['items'] += array('revert' => array());

    $plugin['menu']['items']['revert'] += array(

      'path' => 'list/%ctools_export_ui/revert',

      'title' => 'Revert',

      'page callback' => 'ctools_export_ui_switcher_page',

      // Note: Yes, 'delete' op is correct.

      'page arguments' => array($plugin['name'], 'delete', $prefix_count + 2),

      'load arguments' => array($plugin['name']),

      'access callback' => 'ctools_export_ui_task_access',

      'access arguments' => array($plugin['name'], 'revert', $prefix_count + 2),

      'type' => MENU_CALLBACK,

    );

  }

  if ($plugin['allowed operations']['delete']) {

    $plugin['menu']['items'] += array('delete' => array());

    $plugin['menu']['items']['delete'] += array(

      'path' => 'list/%ctools_export_ui/delete',

      'title' => 'Delete',

      'page callback' => 'ctools_export_ui_switcher_page',

      'page arguments' => array($plugin['name'], 'delete', $prefix_count + 2),

      'load arguments' => array($plugin['name']),

      'access callback' => 'ctools_export_ui_task_access',

      'access arguments' => array($plugin['name'], 'delete', $prefix_count + 2),

      'type' => MENU_CALLBACK,

    );

  }

  if ($plugin['allowed operations']['clone']) {

    $plugin['menu']['items'] += array('clone' => array());

    $plugin['menu']['items']['clone'] += array(

      'path' => 'list/%ctools_export_ui/clone',

      'title' => 'Clone',

      'page callback' => 'ctools_export_ui_switcher_page',

      'page arguments' => array($plugin['name'], 'clone', $prefix_count + 2),

      'load arguments' => array($plugin['name']),

      'access callback' => 'ctools_export_ui_task_access',

      'access arguments' => array($plugin['name'], 'clone', $prefix_count + 2),

      'type' => MENU_CALLBACK,

    );

  }

  if ($plugin['allowed operations']['enable']) {

    $plugin['menu']['items'] += array('enable' => array());

    $plugin['menu']['items']['enable'] += array(

      'path' => 'list/%ctools_export_ui/enable',

      'title' => 'Enable',

      'page callback' => 'ctools_export_ui_switcher_page',

      'page arguments' => array($plugin['name'], 'enable', $prefix_count + 2),

      'load arguments' => array($plugin['name']),

      'access callback' => 'ctools_export_ui_task_access',

      'access arguments' => array($plugin['name'], 'enable', $prefix_count + 2),

      'type' => MENU_CALLBACK,

    );

  }

  if ($plugin['allowed operations']['disable']) {

    $plugin['menu']['items'] += array('disable' => array());

    $plugin['menu']['items']['disable'] += array(

      'path' => 'list/%ctools_export_ui/disable',

      'title' => 'Disable',

      'page callback' => 'ctools_export_ui_switcher_page',

      'page arguments' => array($plugin['name'], 'disable', $prefix_count + 2),

      'load arguments' => array($plugin['name']),

      'access callback' => 'ctools_export_ui_task_access',

      'access arguments' => array($plugin['name'], 'disable', $prefix_count + 2),

      'type' => MENU_CALLBACK,

    );

  }

  // Define some redirects that should happen after edit/add/clone/delete operations.

  $plugin['redirect'] += array(

    'add' => $base_path,

    'clone' => $base_path,

    'edit' => $base_path,

    'delete' => $base_path,

    'revert' => $base_path,

    'import' => $base_path,

  );

  // Define form elements.

  $plugin['form'] += array(

    'settings' => function_exists($plugin['name'] . '_form') ? $plugin['name'] . '_form' : '',

    'validate' => function_exists($plugin['name'] . '_form_validate') ? $plugin['name'] . '_form_validate' : '',

    'submit' => function_exists($plugin['name'] . '_form_submit') ? $plugin['name'] . '_form_submit' : '',

  );

  // Define strings.

  // For all strings, %title may be filled in at a later time via str_replace

  // since we do not know the title now.

  $plugin['strings'] += array(

    'title' => array(),

    'confirmation' => array(),

    'help' => array(),

    'message' => array(),

  );

  // Strings used in drupal_set_title().

  $plugin['strings']['title'] += array(

    'add' => t('Add a new @plugin', array('@plugin' => $plugin['title singular'])),

    // The "%title" will be replaced in ctools_export_ui_form(), as in this

    // stage we dont have the specific exportable object.

    'edit' => t('Edit @plugin %title', array('@plugin' => $plugin['title singular'])),

    'clone' => t('Clone @plugin %title', array('@plugin' => $plugin['title singular'])),

    'import' => t('Import @plugin', array('@plugin' => $plugin['title singular'])),

    'export' => t('Export @plugin %title', array('@plugin' => $plugin['title singular'])),

  );

  // Strings used in confirmation pages.

  $plugin['strings']['confirmation'] += array(

    'revert' => array(),

    'delete' => array(),

    'add' => array(),

    'edit' => array(),

  );

  $plugin['strings']['confirmation']['revert'] += array(

    'question' => t('Are you sure you want to revert %title?'),

    'information' => t('This action will permanently remove any customizations made to this item.'),

    'success' => t('The item has been reverted.'),

  );

  $plugin['strings']['confirmation']['delete'] += array(

    'question' => t('Are you sure you want to delete %title?'),

    'information' => t('This action will permanently remove this item from your database..'),

    'success' => t('The item has been deleted.'),

  );

  $plugin['strings']['confirmation']['add'] += array(

    'success' => t('%title has been created.'),

    'fail' => t('%title could not be created.'),

  );

  $plugin['strings']['confirmation']['edit'] += array(

    'success' => t('%title has been updated.'),

    'fail' => t('%title could not be updated.'),

  );

  // Strings used in $forms.

  $plugin['strings']['help'] += array(

    'import' => t('You can import an exported definition by pasting the exported object code into the field below.'),

  );

  // Strings used in drupal_set_message().

  $plugin['strings']['message'] += array(

    'enable' => t('@plugin %title was enabled.', array('@plugin' => $plugin['title singular proper'])),

    'disable' => t('@plugin %title was disabled.', array('@plugin' => $plugin['title singular proper'])),

    'no items' => t('There are no @titles to display.', array('@titles' => $plugin['title plural'])),

  );

}

/**

 * Get the class to handle creating a list of exportable items.

 *

 * If a plugin does not define a lister class at all, then the default

 * lister class will be used.

 *

 * @return

 *   Either the lister class or FALSE if one could not be had.

 */

function ctools_export_ui_get_handler($plugin) {

  $cache = &drupal_static(__FUNCTION__, array());

  if (empty($cache[$plugin['name']])) {

    // If a list class is not specified by the plugin, fall back to the

    // default ctools_export_ui plugin instead.

    if (empty($plugin['handler'])) {

      $default = ctools_get_export_ui('ctools_export_ui');

      $class = ctools_plugin_get_class($default, 'handler');

    }

    else {

      $class = ctools_plugin_get_class($plugin, 'handler');

    }

    if ($class) {

      $cache[$plugin['name']] = new $class();

      $cache[$plugin['name']]->init($plugin);

    }

  }

  return !empty($cache[$plugin['name']]) ? $cache[$plugin['name']] : FALSE;

}

/**

 * Get the base path from a plugin.

 *

 * @param $plugin

 *   The plugin.

 *

 * @return

 *   The menu path to the plugin's list.

 */

function ctools_export_ui_plugin_base_path($plugin) {

  return $plugin['menu']['menu prefix'] . '/' . $plugin['menu']['menu item'];

}

/**

 * Get the path to a specific menu item from a plugin.

 *

 * @param $plugin

 *   The plugin name.

 * @param $item_id

 *   The id in the menu items from the plugin.

 * @param $export_key

 *   The export key of the item being edited, if it exists.

 * @return

 *   The menu path to the plugin's list.

 */

function ctools_export_ui_plugin_menu_path($plugin, $item_id, $export_key = NULL) {

  $path = $plugin['menu']['items'][$item_id]['path'];

  if ($export_key) {

    $path = str_replace('%ctools_export_ui', $export_key, $path);

  }

  return ctools_export_ui_plugin_base_path($plugin) . '/' . $path;

}

/**

 * Helper function to include CTools plugins and get an export-ui exportable.

 *

 * @param $plugin_name

 *   The plugin that should be laoded.

 */

function ctools_get_export_ui($plugin_name) {

  ctools_include('plugins');

  return ctools_get_plugins('ctools', 'export_ui', $plugin_name);

}

/**

 * Helper function to include CTools plugins and get all export-ui exportables.

 */

function ctools_get_export_uis() {

  ctools_include('plugins');

  return ctools_get_plugins('ctools', 'export_ui');

}

/**

 * Main page callback to manipulate exportables.

 *

 * This simply loads the object defined in the plugin and hands it off to

 * a method based upon the name of the operation in use. This can easily

 * be used to add more ops.

 */

function ctools_export_ui_switcher_page($plugin_name, $op) {

  $args = func_get_args();

  $js = !empty($_REQUEST['js']);

  // Load the $plugin information

  $plugin = ctools_get_export_ui($plugin_name);

  $handler = ctools_export_ui_get_handler($plugin);

  if ($handler) {

    $method = $op . '_page';

    if (method_exists($handler, $method)) {

      // replace the first two arguments:

      $args[0] = $js;

      $args[1] = $_POST;

      return call_user_func_array(array($handler, $method), $args);

    }

  }

  else {

    return t('Configuration error. No handler found.');

  }

}