class RulesUIController

class RulesUIController {
    protected $event_info;
    protected $cache;
    
    /**
     * Generates menu items to manipulate rules configurations.
     *
     * @param string $base_path
     *   The path to the overview page from where the configurations are edited.
     */
    public function config_menu($base_path) {
        $items = array();
        $base_count = count(explode('/', $base_path));
        $items[$base_path . '/manage/%rules_config'] = array(
            'title callback' => 'rules_get_title',
            'title arguments' => array(
                'Editing !plugin "!label"',
                $base_count + 1,
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_form_edit_rules_config',
                $base_count + 1,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'type' => MENU_VISIBLE_IN_BREADCRUMB,
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/add/%rules_element'] = array(
            // Adding another part to the path would hit the menu path-part-limit
            // for base paths like admin/config/workflow/rules. Therefore we have to
            // use this ugly way for setting the title.
'title callback' => 'rules_menu_add_element_title',
            // Wrap the integer in an array, so it is passed as is.
'title arguments' => array(
                array(
                    $base_count + 4,
                ),
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_add_element',
                $base_count + 1,
                $base_count + 4,
                $base_count + 3,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'load arguments' => array(
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/add/event'] = array(
            'title callback' => 'rules_get_title',
            'title arguments' => array(
                'Adding event to !plugin "!label"',
                $base_count + 1,
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_add_event_page',
                $base_count + 1,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'load arguments' => array(
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/delete/event'] = array(
            // @todo Improve title.
'title' => 'Remove event',
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_remove_event',
                $base_count + 1,
                $base_count + 4,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'description' => 'Remove an event from a reaction rule.',
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/edit/%rules_element'] = array(
            'title callback' => 'rules_get_title',
            'title arguments' => array(
                'Editing !plugin "!label"',
                $base_count + 3,
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_edit_element',
                $base_count + 1,
                $base_count + 3,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'load arguments' => array(
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/autocomplete'] = array(
            'page callback' => 'rules_ui_form_data_selection_auto_completion',
            'page arguments' => array(
                $base_count + 3,
                $base_count + 4,
                $base_count + 5,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'type' => MENU_CALLBACK,
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/delete/%rules_element'] = array(
            'title callback' => 'rules_get_title',
            'title arguments' => array(
                'Editing !plugin "!label"',
                $base_count + 3,
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_delete_element',
                $base_count + 1,
                $base_count + 3,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'load arguments' => array(
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/%'] = array(
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_form_rules_config_confirm_op',
                $base_count + 1,
                $base_count + 2,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/clone'] = array(
            'title callback' => 'rules_get_title',
            'title arguments' => array(
                'Cloning !plugin "!label"',
                $base_count + 1,
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_form_clone_rules_config',
                $base_count + 1,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/export'] = array(
            'title callback' => 'rules_get_title',
            'title arguments' => array(
                'Export of !plugin "!label"',
                $base_count + 1,
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_form_export_rules_config',
                $base_count + 1,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'view',
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        $items[$base_path . '/manage/%rules_config/execute'] = array(
            'title callback' => 'rules_get_title',
            'title arguments' => array(
                'Executing !plugin "!label"',
                $base_count + 1,
            ),
            'page callback' => 'drupal_get_form',
            'page arguments' => array(
                'rules_ui_form_execute_rules_config',
                $base_count + 1,
                $base_path,
            ),
            'access callback' => 'rules_config_access',
            'access arguments' => array(
                'update',
                $base_count + 1,
            ),
            'file' => 'ui/ui.forms.inc',
            'file path' => drupal_get_path('module', 'rules'),
        );
        drupal_alter('rules_ui_menu', $items, $base_path, $base_count);
        if (module_exists('rules_scheduler')) {
            $items[$base_path . '/manage/%rules_config/schedule'] = array(
                'title callback' => 'rules_get_title',
                'title arguments' => array(
                    'Schedule !plugin "!label"',
                    $base_count + 1,
                ),
                'page callback' => 'drupal_get_form',
                'page arguments' => array(
                    'rules_scheduler_schedule_form',
                    $base_count + 1,
                    $base_path,
                ),
                'access callback' => 'rules_config_access',
                'access arguments' => array(
                    'update',
                    $base_count + 1,
                ),
                'file' => 'rules_scheduler.admin.inc',
                'file path' => drupal_get_path('module', 'rules_scheduler'),
            );
        }
        return $items;
    }
    
    /**
     * Generates the render array for an overview configuration table.
     *
     * Generates the render array for an overview configuration table for
     * arbitrary rule configs that match the given conditions.
     *
     * Note: The generated overview table contains multiple links for editing the
     * rule configurations. For the links to properly work use
     * RulesUIController::config_menu($base_path) to generate appropriate menu
     * items for the path at which the overview table is displayed.
     *
     * @param array $conditions
     *   An array of conditions as needed by rules_config_load_multiple().
     * @param array $options
     *   An array with optional options. Known keys are:
     *   - 'hide status op': If set to TRUE, enable/disable links are not added.
     *     Defaults to FALSE.
     *   - 'show plugin': If set to FALSE, the plugin is not shown. Defaults to
     *     TRUE.
     *   - 'show events': If set to TRUE, the event column is shown. Defaults to
     *     TRUE if only reaction rules are listed.
     *   - 'show execution op': If set to TRUE an operation for execution a
     *     component is shown for components, as well as a link to schedule a
     *     component if the rules scheduler module is enabled.
     *   - 'base path': Optionally, a different base path to use instead of the
     *     currently set RulesPluginUI::$basePath. If no base path has been set
     *     yet, the current path is used by default.
     *
     * @return array
     *   A renderable array.
     */
    public function overviewTable($conditions = array(), $options = array()) {
        $options += array(
            'hide status op' => FALSE,
            'show plugin' => TRUE,
            'show events' => isset($conditions['plugin']) && $conditions['plugin'] == 'reaction rule',
            'show execution op' => !(isset($conditions['plugin']) && $conditions['plugin'] == 'reaction rule'),
        );
        // By default show only configurations owned by rules.
        $conditions += array(
            'owner' => 'rules',
        );
        if (!empty($options['base path'])) {
            RulesPluginUI::$basePath = $options['base path'];
        }
        elseif (!isset(RulesPluginUI::$basePath)) {
            // Default to the current path, only if no path has been set yet.
            RulesPluginUI::$basePath = current_path();
        }
        $entities = entity_load('rules_config', FALSE, $conditions);
        ksort($entities);
        // Prepare some variables used by overviewTableRow().
        $this->event_info = rules_fetch_data('event_info');
        $this->cache = rules_get_cache();
        $rows = array();
        foreach ($entities as $id => $entity) {
            if (user_access('bypass rules access') || $entity->access()) {
                $rows[] = $this->overviewTableRow($conditions, $id, $entity, $options);
            }
        }
        // Assemble the right table header.
        $header = array(
            t('Name'),
            t('Event'),
            t('Plugin'),
            t('Status'),
            array(
                'data' => t('Operations'),
            ),
        );
        if (!$options['show events']) {
            // Remove the event heading as there is no such column.
            unset($header[1]);
        }
        if (!$options['show plugin']) {
            unset($header[2]);
        }
        // Fix the header operation column colspan.
        $num_cols = isset($rows[0]) ? count($rows[0]) : 0;
        if (($addition = $num_cols - count($header)) > 0) {
            $header[4]['colspan'] = $addition + 1;
        }
        $table = array(
            '#theme' => 'table',
            '#header' => $header,
            '#rows' => $rows,
            '#empty' => t('None.'),
        );
        $table['#attributes']['class'][] = 'rules-overview-table';
        $table['#attached']['css'][] = drupal_get_path('module', 'rules') . '/ui/rules.ui.css';
        // @todo Hide configs where access() is FALSE.
        return $table;
    }
    
    /**
     * Generates the row for a single rules config.
     *
     * @param array $conditions
     *   An array of conditions as needed by rules_config_load_multiple().
     * @param array $options
     *   An array with optional options. Known keys are:
     *   - 'hide status op': If set to TRUE, enable/disable links are not added.
     *     Defaults to FALSE.
     *   - 'show plugin': If set to FALSE, the plugin is not shown. Defaults to
     *     TRUE.
     *   - 'show events': If set to TRUE, the event column is shown. Defaults to
     *     TRUE if only reaction rules are listed.
     *   - 'show execution op': If set to TRUE an operation for execution a
     *     component is shown for components, as well as a link to schedule a
     *     component if the rules scheduler module is enabled.
     *   - 'base path': Optionally, a different base path to use instead of the
     *     currently set RulesPluginUI::$basePath. If no base path has been set
     *     yet, the current path is used by default.
     */
    protected function overviewTableRow($conditions, $name, $config, $options) {
        // Build content includes the label, as well as a short overview including
        // the machine name.
        $row[] = array(
            'data' => $config->buildContent(),
        );
        // Add events if the configs are assigned to events.
        if ($options['show events']) {
            $events = array();
            if ($config instanceof RulesTriggerableInterface) {
                foreach ($config->events() as $event_name) {
                    $event_handler = rules_get_event_handler($event_name, $config->getEventSettings($event_name));
                    $events[] = $event_handler->summary();
                }
            }
            $row[] = implode(", ", $events);
        }
        if ($options['show plugin']) {
            $plugin = $config->plugin();
            $row[] = isset($this->cache['plugin_info'][$plugin]['label']) ? $this->cache['plugin_info'][$plugin]['label'] : $plugin;
        }
        $row[] = array(
            'data' => array(
                '#theme' => 'entity_status',
                '#status' => $config->status,
            ),
        );
        // Add operations depending on the options and the exportable status.
        if (!$config->hasStatus(ENTITY_FIXED)) {
            $row[] = l(t('edit'), RulesPluginUI::path($name), array(
                'attributes' => array(
                    'class' => array(
                        'edit',
                        'action',
                    ),
                ),
            ));
            if (module_exists('rules_i18n')) {
                $row[] = l(t('translate'), RulesPluginUI::path($name, 'translate'), array(
                    'attributes' => array(
                        'class' => array(
                            'translate',
                            'action',
                        ),
                    ),
                ));
            }
        }
        else {
            $row[] = '';
            if (module_exists('rules_i18n')) {
                $row[] = '';
            }
        }
        if (!$options['hide status op']) {
            // Add either an enable or disable link.
            $text = $config->active ? t('disable') : t('enable');
            $active_class = $config->active ? 'disable' : 'enable';
            $link_path = RulesPluginUI::path($name, $active_class);
            $row[] = $config->hasStatus(ENTITY_FIXED) ? '' : l($text, $link_path, array(
                'attributes' => array(
                    'class' => array(
                        $active_class,
                        'action',
                    ),
                ),
                'query' => drupal_get_destination(),
            ));
        }
        $row[] = l(t('clone'), RulesPluginUI::path($name, 'clone'), array(
            'attributes' => array(
                'class' => array(
                    'clone',
                    'action',
                ),
            ),
        ));
        // Add execute link for for components.
        if ($options['show execution op']) {
            $row[] = $config instanceof RulesTriggerableInterface ? '' : l(t('execute'), RulesPluginUI::path($name, 'execute'), array(
                'attributes' => array(
                    'class' => array(
                        'execute',
                        'action',
                    ),
                ),
                'query' => drupal_get_destination(),
            ));
            if (module_exists('rules_scheduler')) {
                // Add schedule link for action components only.
                $row[] = $config instanceof RulesActionInterface ? l(t('schedule'), RulesPluginUI::path($name, 'schedule'), array(
                    'attributes' => array(
                        'class' => array(
                            'schedule',
                            'action',
                        ),
                    ),
                    'query' => drupal_get_destination(),
                )) : '';
            }
        }
        if (!$config->hasStatus(ENTITY_IN_CODE) && !$config->hasStatus(ENTITY_FIXED)) {
            $row[] = l(t('delete'), RulesPluginUI::path($name, 'delete'), array(
                'attributes' => array(
                    'class' => array(
                        'delete',
                        'action',
                    ),
                ),
                'query' => drupal_get_destination(),
            ));
        }
        elseif ($config->hasStatus(ENTITY_OVERRIDDEN) && !$config->hasStatus(ENTITY_FIXED)) {
            $row[] = l(t('revert'), RulesPluginUI::path($name, 'revert'), array(
                'attributes' => array(
                    'class' => array(
                        'revert',
                        'action',
                    ),
                ),
                'query' => drupal_get_destination(),
            ));
        }
        else {
            $row[] = '';
        }
        $row[] = l(t('export'), RulesPluginUI::path($name, 'export'), array(
            'attributes' => array(
                'class' => array(
                    'export',
                    'action',
                ),
            ),
        ));
        return $row;
    }

}