<?php

/**
 * @file
 * Provide structure for the administrative interface to Views.
 */

use Drupal\views\ViewExecutable;
use Drupal\views\ViewStorageInterface;
use Drupal\views_ui\ViewUI;
use Drupal\views\Analyzer;
use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Ajax\ReplaceCommand;

/**
 * Implements hook_menu().
 */
function views_ui_menu() {
  $items = array();

  // Top-level Views module pages (not tied to a particular View).
  $items['admin/structure/views'] = array(
    'title' => 'Views',
    'description' => 'Manage customized lists of content.',
    'route_name' => 'views_ui.list',
  );

  // @todo - remove all items of type MENU_VISIBLE_IN_BREADCRUMB
  // when there is a route-aware breadcrumb builder.
  $items['admin/structure/views/settings'] = array(
    'title' => 'Settings',
    'route_name' => 'views_ui.settings_basic',
    'type' => MENU_VISIBLE_IN_BREADCRUMB,
  );

  $items['admin/structure/views/settings/advanced'] = array(
    'title' => 'Advanced',
    'route_name' => 'views_ui.settings_advanced',
    'type' => MENU_VISIBLE_IN_BREADCRUMB,
  );

  // The primary Edit View page. Secondary tabs for each Display are added in
  // views_ui_menu_local_tasks_alter().
  $items['admin/structure/views/view/%'] = array(
    'route_name' => 'views_ui.edit',
  );
  $items['admin/structure/views/view/%/edit'] = array(
    'title' => 'Edit view',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
  );
  $items['admin/structure/views/view/%/preview/%'] = array(
    'route_name' => 'views_ui.preview',
    'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
    'type' => MENU_VISIBLE_IN_BREADCRUMB,
  );

  // Additional pages for acting on a View.

  $items['admin/structure/views/view/%/break-lock'] = array(
    'title' => 'Break lock',
    'route_name' => 'views_ui.break_lock',
    'type' => MENU_VISIBLE_IN_BREADCRUMB,
  );

  // NoJS/AJAX callbacks that can use the default Views AJAX form system.
  $items['admin/structure/views/nojs/%/%'] = array(
    'type' => MENU_VISIBLE_IN_BREADCRUMB,
  );

  // A page in the Reports section to show usage of fields in all views
  $items['admin/reports/fields/views-fields'] = array(
    'title' => 'Used in views',
    'description' => 'Overview of fields used in all views.',
    'route_name' => 'views_ui.reports_fields',
    'type' => MENU_LOCAL_TASK,
  );

  // A page in the Reports section to show usage of plugins in all views.
  $items['admin/reports/views-plugins'] = array(
    'title' => 'Views plugins',
    'description' => 'Overview of plugins used in all views.',
    'route_name' => 'views_ui.reports_plugins',
  );

  return $items;
}

/**
 * Implements hook_entity_info().
 */
function views_ui_entity_info(&$entity_info) {
  $entity_info['view']['controllers'] += array(
    'list' => 'Drupal\views_ui\ViewListController',
    'form' => array(
      'edit' => 'Drupal\views_ui\ViewEditFormController',
      'add' => 'Drupal\views_ui\ViewAddFormController',
      'preview' => 'Drupal\views_ui\ViewPreviewFormController',
      'clone' => 'Drupal\views_ui\ViewCloneFormController',
      'delete' => 'Drupal\views_ui\ViewDeleteFormController',
      'break_lock' => 'Drupal\views_ui\Form\BreakLockForm',
    ),
  );
}

/**
 * Implements hook_theme().
 */
function views_ui_theme() {
  return array(
    // edit a view
    'views_ui_display_tab_setting' => array(
      'variables' => array('description' => '', 'link' => '', 'settings_links' => array(), 'overridden' => FALSE, 'defaulted' => FALSE, 'description_separator' => TRUE, 'class' => array()),
      'template' => 'views-ui-display-tab-setting',
      'file' => 'views_ui.theme.inc',
    ),
    'views_ui_display_tab_bucket' => array(
      'render element' => 'element',
      'template' => 'views-ui-display-tab-bucket',
      'file' => 'views_ui.theme.inc',
    ),
    'views_ui_rearrange_filter_form' => array(
      'render element' => 'form',
      'file' => 'views_ui.theme.inc',
    ),
    'views_ui_expose_filter_form' => array(
      'render element' => 'form',
      'file' => 'views_ui.theme.inc',
    ),

    // list views
    'views_ui_view_info' => array(
      'variables' => array('view' => NULL, 'displays' => NULL),
      'file' => 'views_ui.theme.inc',
      'template' => 'views-ui-view-info',
    ),

    // Group of filters.
    'views_ui_build_group_filter_form' => array(
      'render element' => 'form',
      'file' => 'views_ui.theme.inc',
    ),

    // On behalf of a plugin
    'views_ui_style_plugin_table' => array(
      'render element' => 'form',
      'file' => 'views_ui.theme.inc',
      'template' => 'views-ui-style-plugin-table',
    ),

    // When previewing a view.
    'views_ui_view_preview_section' => array(
      'variables' => array('view' => NULL, 'section' => NULL, 'content' => NULL, 'links' => ''),
      'file' => 'views_ui.theme.inc',
      'template' => 'views-ui-view-preview-section',
    ),

    // Generic container wrapper, to use instead of theme_container when an id
    // is not desired.
    'views_ui_container' => array(
      'variables' => array('children' => NULL, 'attributes' => array()),
      'template' => 'views-ui-container',
      'file' => 'views_ui.theme.inc',
    ),
  );
}

/**
 * Implements hook_permission().
 */
function views_ui_permission() {
  return array(
    'administer views' => array(
      'title' => t('Administer views'),
      'description' => t('Access the views administration pages.'),
      'restrict access' => TRUE,
    ),
  );
}

/**
 * Implements hook_library_info().
 */
function views_ui_library_info() {
  $libraries = array();

  $path = drupal_get_path('module', 'views_ui') . '/js/';

  $libraries['views_ui.admin'] = array(
    'title' => 'Views UI ADMIN',
    'version' => \Drupal::VERSION,
    'js' => array(
      $path . 'ajax.js' => array('group' => JS_DEFAULT),
      $path . 'views-admin.js' => array('group' => JS_DEFAULT),
    ),
    'dependencies' => array(
      array('system', 'jquery'),
      array('system', 'drupal'),
      array('system', 'drupalSettings'),
      array('system', 'drupal.debounce'),
      array('system', 'jquery.once'),
      array('system', 'jquery.form'),
      array('system', 'drupal.ajax'),
      array('views', 'views.ajax'),
    ),
  );

  $libraries['views_ui.listing'] = array(
    'title' => 'Views UI listing',
    'version' => Drupal::VERSION,
    'js' => array(
      $path . 'views_ui.listing.js' => array('group' => JS_DEFAULT),
    ),
  );

  return $libraries;
}

/**
 * Implements hook_preprocess_HOOK() for views templates.
 */
function views_ui_preprocess_views_view(&$variables) {
  $view = $variables['view'];
  if (!empty($view->live_preview) && \Drupal::moduleHandler()->moduleExists('contextual')) {
    $view->setShowAdminLinks(FALSE);
    foreach (array('title', 'header', 'exposed', 'rows', 'pager', 'more', 'footer', 'empty', 'attachment_after', 'attachment_before') as $section) {
      if (!empty($variables[$section])) {
        $variables[$section] = array(
          '#theme' => 'views_ui_view_preview_section',
          '#view' => $view,
          '#section' => $section,
          '#content' => $variables[$section],
          '#theme_wrappers' => array('views_ui_container'),
          '#attributes' => array('class' => 'contextual-region'),
        );
        $variables[$section] = $variables[$section];
      }
    }
  }
}

/**
 * Returns contextual links for each handler of a certain section.
 *
 * @TODO
 *   Bring in relationships
 *   Refactor this function to use much stuff of views_ui_edit_form_get_bucket.
 *
 * @param $title
 *   Add a bolded title of this section.
 */
function views_ui_view_preview_section_handler_links(ViewExecutable $view, $type, $title = FALSE) {
  $display = $view->display_handler->display;
  $handlers = $view->display_handler->getHandlers($type);
  $links = array();

  $types = ViewExecutable::viewsHandlerTypes();
  if ($title) {
    $links[$type . '-title'] = array(
      'title' => $types[$type]['title'],
    );
  }

  foreach ($handlers as $id => $handler) {
    $field_name = $handler->adminLabel(TRUE);
    $links[$type . '-edit-' . $id] = array(
      'title' => t('Edit @section', array('@section' => $field_name)),
      'href' => "admin/structure/views/nojs/config-item/{$view->storage->id()}/{$display['id']}/$type/$id",
      'attributes' => array('class' => array('views-ajax-link')),
    );
  }
  $links[$type . '-add'] = array(
    'title' => t('Add new'),
    'href' => "admin/structure/views/nojs/add-item/{$view->storage->id()}/{$display['id']}/$type",
    'attributes' => array('class' => array('views-ajax-link')),
  );

  return $links;
}

/**
 * Returns a link to editing a certain display setting.
 */
function views_ui_view_preview_section_display_category_links(ViewExecutable $view, $type, $title) {
  $display = $view->display_handler->display;
  $links = array(
    $type . '-edit' => array(
      'title' => t('Edit @section', array('@section' => $title)),
      'href' => "admin/structure/views/nojs/display/{$view->storage->id()}/{$display['id']}/$type",
      'attributes' => array('class' => array('views-ajax-link')),
    ),
  );

  return $links;
}

/**
 * Returns all contextual links for the main content part of the view.
 */
function views_ui_view_preview_section_rows_links(ViewExecutable $view) {
  $display = $view->display_handler->display;
  $links = array();
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'filter', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'field', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'sort', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'argument', TRUE));
  $links = array_merge($links, views_ui_view_preview_section_handler_links($view, 'relationship', TRUE));

  return $links;
}

/**
 * Implements hook_views_plugins_display_alter().
 */
function views_ui_views_plugins_display_alter(&$plugins) {
  // Attach contextual links to each display plugin. The links will point to
  // paths underneath "admin/structure/views/view/{$view->id()}" (i.e., paths
  // for editing and performing other contextual actions on the view).
  foreach ($plugins as &$display) {
    $display['contextual links']['views_ui'] = array(
      'parent path' => 'admin/structure/views/view',
      'argument properties' => array('id'),
    );
  }
}

/**
 * Implements hook_contextual_links_view_alter().
 */
function views_ui_contextual_links_view_alter(&$element, $items) {
  // Remove contextual links from being rendered, when so desired, such as
  // within a View preview.
  if (views_ui_contextual_links_suppress()) {
    $element['#links'] = array();
  }
  // Append the display ID to the Views UI edit links, so that clicking on the
  // contextual link takes you directly to the correct display tab on the edit
  // screen.
  elseif (!empty($element['#links']['views-ui-edit'])) {
    $display_id = $element['#contextual_links']['views_ui'][2]['display_id'];
    $element['#links']['views-ui-edit']['href'] .= '/edit/' . $display_id;
  }
}

/**
 * Sets a static variable for controlling whether contextual links are rendered.
 *
 * @see views_ui_contextual_links_view_alter()
 */
function views_ui_contextual_links_suppress($set = NULL) {
  $suppress = &drupal_static(__FUNCTION__);
  if (isset($set)) {
    $suppress = $set;
  }
  return $suppress;
}

/**
 * Increments the views_ui_contextual_links_suppress() static variable.
 *
 * When this function is added to the #pre_render of an element, and
 * 'views_ui_contextual_links_suppress_pop' is added to the #post_render of the
 * same element, then all contextual links within the element and its
 * descendants are suppressed from being rendered. This is used, for example,
 * during a View preview, when it is not desired for nodes in the Views result
 * to have contextual links.
 *
 * @see views_ui_contextual_links_suppress_pop()
 */
function views_ui_contextual_links_suppress_push() {
  views_ui_contextual_links_suppress(((int) views_ui_contextual_links_suppress())+1);
}

/**
 * Decrements the views_ui_contextual_links_suppress() static variable.
 *
 * @see views_ui_contextual_links_suppress_push()
 */
function views_ui_contextual_links_suppress_pop() {
  views_ui_contextual_links_suppress(((int) views_ui_contextual_links_suppress())-1);
}

/**
 * This is part of a patch to address a jQueryUI bug.  The bug is responsible
 * for the inability to scroll a page when a modal dialog is active. If the content
 * of the dialog extends beyond the bottom of the viewport, the user is only able
 * to scroll with a mousewheel or up/down keyboard keys.
 *
 * @see http://bugs.jqueryui.com/ticket/4671
 * @see https://bugs.webkit.org/show_bug.cgi?id=19033
 * @see /js/jquery.ui.dialog.patch.js
 * @see /js/jquery.ui.dialog.min.js
 *
 * The javascript patch overwrites the $.ui.dialog.overlay.events object to remove
 * the mousedown, mouseup and click events from the list of events that are bound
 * in $.ui.dialog.overlay.create.
 */

function views_ui_library_alter(&$libraries, $module) {
  if ($module == 'system' && isset($libraries['jquery.ui.dialog'])) {
    if (version_compare($libraries['jquery.ui.dialog']['version'], '1.7.2', '>=')) {
      $libraries['jquery.ui.dialog']['js'][drupal_get_path('module', 'views') . '/js/jquery.ui.dialog.patch.js'] = array();
    }
  }
}

/**
 * Implements hook_views_analyze().
 *
 * This is the basic views analysis that checks for very minimal problems.
 * There are other analysis tools in core specific sections, such as
 * node.views.inc as well.
 */
function views_ui_views_analyze(ViewExecutable $view) {
  $ret = array();
  // Check for something other than the default display:
  if (count($view->displayHandlers) < 2) {
    $ret[] = Analyzer::formatMessage(t('This view has only a default display and therefore will not be placed anywhere on your site; perhaps you want to add a page or a block display.'), 'warning');
  }
  // You can give a page display the same path as an alias existing in the
  // system, so the alias will not work anymore. Report this to the user,
  // because he probably wanted something else.
  foreach ($view->displayHandlers as $display) {
    if (empty($display)) {
      continue;
    }
    if ($display->hasPath() && $path = $display->getOption('path')) {
      $normal_path = \Drupal::service('path.alias_manager.cached')->getSystemPath($path);
      if ($path != $normal_path) {
        $ret[] = Analyzer::formatMessage(t('You have configured display %display with a path which is an path alias as well. This might lead to unwanted effects so better use an internal path.', array('%display' => $display->display['display_title'])), 'warning');
      }
    }
  }

  return $ret;
}

/**
 * Truncate strings to a set length and provide a ... if they truncated.
 *
 * This is often used in the UI to ensure long strings fit.
 */
function views_ui_truncate($string, $length) {
  if (drupal_strlen($string) > $length) {
    $string = drupal_substr($string, 0, $length);
    $string .= '...';
  }

  return $string;
}

/**
 * Magic load function. Wrapper to load a view.
 */
function views_ui_load($name) {
  return views_get_view($name);
}