Club Drupal

<?php

/**

 * @file panels_node.module

 *

 * This module provides the "panel" node type.

 * Panel nodes are useful to add additional content to the content area

 * on a per-node base.

 */

// ---------------------------------------------------------------------------

// General Drupal hooks

/**

 * Implementation of hook_permission().

 */

function panels_node_permission() {

  return array(

    'administer panel-nodes' => array(

      'title' => t('Administer panel nodes'),

      'description' => t('Full administrative access to panel nodes including create, update and delete all'),

    ),

  );

}

/**

 * Implementation of hook_ctools_plugin_directory().

 */

function panels_node_ctools_plugin_directory($module, $plugin) {

  if ($module == 'panels' && $plugin == 'panels_storage') {

    return 'plugins/' . $plugin;

  }

}

/**

 * Implementation of hook_menu().

 */

function panels_node_menu() {

  // Safety: go away if CTools is not at an appropriate version.

  if (!defined('PANELS_REQUIRED_CTOOLS_API') || !module_invoke('ctools', 'api_version', PANELS_REQUIRED_CTOOLS_API)) {

    return array();

  }

  $items['admin/structure/panels/settings/panel-node'] = array(

    'title' => 'Panel nodes',

    'description' => 'Configure which content is available to add to panel node displays.',

    'access arguments' => array('administer panel-nodes'),

    'page callback' => 'panels_node_settings',

    'type' => MENU_LOCAL_TASK,

  );

  // Avoid some repetition on these:

  $base = array(

    'access callback' => 'panels_node_edit_node',

    'access arguments' => array(1),

    'page arguments' => array(1),

    'type' => MENU_LOCAL_TASK,

  );

  $items['node/%node/panel_layout'] = array(

    'title' => 'Panel layout',

    'page callback' => 'panels_node_edit_layout',

    'weight' => 2,

  ) + $base;

  $items['node/%node/panel_content'] = array(

    'title' => 'Panel content',

    'page callback' => 'panels_node_edit_content',

    'weight' => 3,

  ) + $base;

  $items['node/add/panel/choose-layout'] = array(

    'title' => 'Choose layout',

    'access callback' => 'panels_add_panel_access_callback',

    'page callback' => 'panels_node_add',

    'type' => MENU_CALLBACK,

  );

  return $items;

}

/**

 * Access callback to determine if a user has edit access

 */

function panels_node_edit_node($node) {

  if (!isset($node->panels_node)) {

    return FALSE;

  }

  return node_access('update', $node);

}

/**

 * Access callback to determine if user has access to add panel nodes.

 */

function panels_add_panel_access_callback() {

  return user_access('create panel content') || user_access('administer panel-nodes');

}

/**

 * Override of node add page to force layout selection prior

 * to actually editing a node.

 */

function panels_node_add() {

  $output = '';

  ctools_include('plugins', 'panels');

  ctools_include('common', 'panels');

  $layouts = panels_common_get_allowed_layouts('panels_node');

  return panels_common_print_layout_links($layouts, 'node/add/panel', array('query' => drupal_get_query_parameters()));

}

// ---------------------------------------------------------------------------

// Node hooks

/**

 * Implementation of hook_node_info().

 */

function panels_node_node_info() {

  // Safety: go away if CTools is not at an appropriate version.

  if (!defined('PANELS_REQUIRED_CTOOLS_API') || !module_invoke('ctools', 'api_version', PANELS_REQUIRED_CTOOLS_API)) {

    return array();

  }

  return array(

    'panel' => array(

      'name' => t('Panel'),

      // We use panels_node_hook so that panels_node private

      // callbacks do not get confused with panels versions of

      // nodeapi callbacks.

      'base' => 'panels_node_hook',

      'body_label' => t('Teaser'),

      'description' => t("A panel layout broken up into rows and columns."),

    ),

  );

}

/**

 * Implementation of hook_access().

 */

function panels_node_node_access($node, $op, $account) {

  if ($op == 'create' && $node != 'panel') {

    return NODE_ACCESS_IGNORE;

  }

  if (is_object($node) && $node->type != 'panel') {

    return NODE_ACCESS_IGNORE;

  }

  if (user_access('administer panel-nodes', $account)) {

    return NODE_ACCESS_ALLOW;

  }

}

/**

 * Implementation of hook_form().

 */

function panels_node_hook_form(&$node, &$form_state) {

  ctools_include('plugins', 'panels');

  $form['panels_node']['#tree'] = TRUE;

  if (empty($node->nid) && arg(0) == 'node' && arg(1) == 'add') {

    // Grab our selected layout from the $node, If it doesn't exist, try arg(3)

    // and if that doesn't work present them with a list to pick from.

    $panel_layout = isset($node->panel_layout) ? $node->panel_layout : arg(3);

    if (empty($panel_layout)) {

      drupal_goto('node/add/panel/choose-layout', array('query' => drupal_get_query_parameters()));

    }

    $layout = panels_get_layout($panel_layout);

    if (empty($layout)) {

      return MENU_NOT_FOUND;

    }

    $form['panels_node']['layout'] = array(

      '#type' => 'value',

      '#value' => $panel_layout,

    );

  }

  $type = node_type_get_type($node);

  $form['title'] = array(

    '#type' => 'textfield',

    '#title' => check_plain($type->title_label),

    '#required' => TRUE,

    '#default_value' => $node->title,

  );

  $css_id = '';

  if (!empty($node->panels_node['css_id'])) {

    $css_id = $node->panels_node['css_id'];

  }

  $form['panels_node']['css_id'] = array(

    '#type' => 'textfield',

    '#title' => t('CSS ID'),

    '#size' => 30,

    '#description' => t('An ID that can be used by CSS to style the panel.'),

    '#default_value' => $css_id,

  );

  // Support for different rendering pipelines

  // Mostly borrowed from panel_context.inc

  $pipelines = panels_get_renderer_pipelines();

  $options = array();

  foreach ($pipelines as $name => $pipeline) {

    $options[$name] = check_plain($pipeline->admin_title) . '<div class="description">' . check_plain($pipeline->admin_description) . '</div>';

  }

  $form['panels_node']['pipeline'] = array(

    '#type' => 'radios',

    '#options' => $options,

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

    '#default_value' => isset($node->panels_node['pipeline']) ? $node->panels_node['pipeline'] : variable_get('panels_renderer_default', 'standard'),

  );

  return $form;

}

/**

 * Implementation of hook_validate().

 */

function panels_node_hook_validate($node, $form, &$form_state) {

  if (!$node->nid && empty($node->panels_node['layout'])) {

    form_error($form['panels_node']['layout'], t('Please select a layout.'));

  }

}

/**

 * Implementation of hook_load().

 *

 * Panels does not use revisions for nodes because that would open us up

 * to have completely separate displays, and we'd have to copy them,

 * and that's going to be a LOT of data.

 */

function panels_node_hook_load($nodes) {

  // We shortcut this because only in some really drastic corruption circumstance will this

  // not work.

  $result = db_query("SELECT * FROM {panels_node} WHERE nid IN (:nids)", array(':nids' => array_keys($nodes)));

  foreach ($result as $record) {

    $nodes[$record->nid]->panels_node = (array) $record;

  }

}

/**

 * Implementation of hook_insert().

 */

function panels_node_hook_insert(&$node) {

  // Create a new display and record that.

  $display = panels_new_display();

  $display->layout = $node->panels_node['layout'];

  $display->storage_type = 'panels_node';

  $display->storage_id = $node->nid;

  // Special handling for nodes being imported from an export.module data dump.

  if (!empty($node->export_display)) {

    // This works by overriding the $display set above

    eval($node->export_display);

    unset($node->export_display);

  }

  panels_save_display($display);

  $node->panels_node['did'] = $display->did;

  db_insert('panels_node')

    ->fields(array(

      'nid' => $node->nid,

      'did' => $display->did,

      'css_id' => $node->panels_node['css_id'],

      'pipeline' => $node->panels_node['pipeline'],

    ))

    ->execute();

}

/**

 * Implementation of hook_delete().

 */

function panels_node_hook_delete(&$node) {

  db_delete('panels_node')->condition('nid', $node->nid)->execute();

  if (!empty($node->panels_node['did'])) {

    panels_delete_display($node->panels_node['did']);

  }

}

/**

 * Implementation of hook_update().

 */

function panels_node_hook_update($node) {

  db_update('panels_node')

    ->condition('nid', $node->nid)

    ->fields(array(

      'css_id' => $node->panels_node['css_id'],

      'pipeline' => $node->panels_node['pipeline'],

    ))

    ->execute();

}

/**

 * Implementation of hook_view().

 */

function panels_node_hook_view($node, $view_mode) {

  static $rendering = array();

  // Prevent loops if someone foolishly puts the node inside itself:

  if (!empty($rendering[$node->nid])) {

    return $node;

  }

  $rendering[$node->nid] = TRUE;

  ctools_include('plugins', 'panels');

  if ($view_mode == 'teaser') {

    // Because our teasier is never the same as our content, *always* provide

    // the read more flag.

    $node->readmore = TRUE;

  }

  else {

    if (!empty($node->panels_node['did'])) {

      $display = panels_load_display($node->panels_node['did']);

      $display->css_id = $node->panels_node['css_id'];

      // TODO: Find a way to make sure this can't node_view.

      $display->context = panels_node_get_context($node);

      $display->cache_key = 'panels_node:' . $node->nid;

      $renderer = panels_get_renderer($node->panels_node['pipeline'], $display);

      $node->content['body'] = array(

        '#markup' => panels_render_display($display, $renderer),

        '#weight' => 0,

      );

    }

  }

  unset($rendering[$node->nid]);

  return $node;

}

// ---------------------------------------------------------------------------

// Administrative pages

/**

 * Settings for panel nodes.

 */

function panels_node_settings() {

  ctools_include('common', 'panels');

  return drupal_get_form('panels_common_settings', 'panels_node');

}

// ---------------------------------------------------------------------------

// Meat of the Panels API; almost completely passing through to panels.module

/**

 * Pass through to the panels layout editor.

 */

function panels_node_edit_layout($node) {

//  ctools_include('plugins', 'panels');

  ctools_include('context');

  $display = panels_load_display($node->panels_node['did']);

  $display->context = panels_node_get_context($node);

  return panels_edit_layout($display, t('Save'), "node/$node->nid/panel_layout", 'panels_node');

}

/**

 * Pass through to the panels content editor.

 */

function panels_node_edit_content($node) {

  ctools_include('context');

  $display = panels_load_display($node->panels_node['did']);

  $display->context = panels_node_get_context($node);

  ctools_include('common', 'panels');

  $content_types = panels_common_get_allowed_types('panels_node', $display->context);

  return panels_edit($display, "node/$node->nid/panel_content", $content_types);

}

/**

 * Build the context to use for a panel node.

 */

function panels_node_get_context(&$node) {

  ctools_include('context');

  $context = ctools_context_create('node', $node);

  $context->identifier = t('This node');

  $context->keyword = 'node';

  return array('panel-node' => $context);

}

/**

 * Implementation of hook_export_node_alter()

 *

 * Integrate with export.module for saving panel_nodes into code.

 */

function panels_node_export_node_alter(&$node, $original_node, $method) {

  if ($method == 'export') {

    $node_export_omitted = variable_get('node_export_omitted', array());

    if (variable_get('node_export_method', '') != 'save-edit' && (array_key_exists('panel', $node_export_omitted) && !$node_export_omitted['panel'])) {

      drupal_set_message(t("NOTE: in order to import panel_nodes you must first set the export.module settings to \"Save as a new node then edit\", otherwise it won't work."));

    }

    $display = panels_load_display($node->panels_node['did']);

    $export = panels_export_display($display);

    $node->export_display = $export;

  }

}

/**

 * Implementation of hook_panels_dashboard_blocks().

 *

 * Adds panel nodes information to the Panels dashboard.

 */

function panels_node_panels_dashboard_blocks(&$vars) {

  $vars['links']['panels_node'] = array(

    'title' => l(t('Panel node'), 'node/add/panel'),

    'description' => t('Panel nodes are node content and appear in your searches, but are more limited than panel pages.'),

    'weight' => -1,

  );

}

/**

 * Implements hook_panels_ipe_access().

 */

function panels_node_panels_ipe_access($display) {

  // We only care about Panels displays from panels_node.

  if (isset($display->context['panel-node'])) {

    // Only allow access to use the IPE if the user has 'update' access to

    // the underlying node.

    $node = $display->context['panel-node']->data;

    return node_access('update', $node); 

  }

}

// ---------------------------------------------------------------------------

// Callbacks for panel caching.

/**

 * Get display edit cache for a panel node being edited.

 *

 * The key is the second half of the key in this form:

 * panels_node:NID;

 */

function panels_node_panels_cache_get($nid) {

  ctools_include('object-cache');

  $cache = ctools_object_cache_get('panels_node_display_cache', $nid);

  if (empty($cache)) {

    $cache = new stdClass();

    $node = node_load($nid);

    if (empty($node)) {

      return;

    }

    ctools_include('common', 'panels');

    $cache->display = panels_load_display($node->panels_node['did']);

    $cache->display->css_id = $node->panels_node['css_id'];

    $cache->display->context = panels_node_get_context($node);

    $cache->display->cache_key = 'panels_node:' . $node->nid;

    $cache->content_types =   panels_common_get_allowed_types('panels_node', $cache->display->context);

    $cache->allwed_layouts = panels_common_get_allowed_layouts('panels_node');

  }

  return $cache;

}

/**

 * Store a display edit in progress in the panels cache.

 */

function panels_node_panels_cache_set($nid, $cache) {

  ctools_include('object-cache');

  ctools_object_cache_set('panels_node_display_cache', $nid, $cache);

}

/**

 * Clear all changes made to a display using the panels cache.

 */

function panels_node_panels_cache_clear($nid, $cache) {

  ctools_include('object-cache');

  ctools_object_cache_clear('panels_node_display_cache', $nid);

}

/**

 * React to a cache save and save the display and clear cache.

 */

function panels_node_panels_cache_save($nid, $cache) {

  panels_save_display($cache->display);

  ctools_include('object-cache');

  ctools_object_cache_clear('panels_node_display_cache', $nid);

}