Club Drupal

<?php

/**

 * @file

 */

/**

 * Specialized implementation of hook_page_manager_task_tasks(). See api-task.html for

 * more information.

 */

function page_manager_comment_reply_page_manager_tasks() {

  if (!module_exists('comment')) {

    return;

  }

  return array(

    // This is a 'page' task and will fall under the page admin UI.

    'task type' => 'page',

    'title' => t('Comment Reply page'),

    'admin title' => t('Comment Reply page'),

    'admin description' => t('When enabled, this overrides the default Drupal behavior for the site contact page at <em>/contact</em>. If no variant is selected, the default Drupal contact form will be used.'),

    'admin path' => 'comment/reply/%node',

    // Menu hooks so that we can alter the node/%node menu entry to point to us.

    'hook menu alter' => 'page_manager_comment_reply_menu_alter',

    // This is task uses 'context' handlers and must implement these to give the

    // handler data it needs.

    'handler type' => 'context',

    'get arguments' => 'page_manager_comment_reply_get_arguments',

    'get context placeholders' => 'page_manager_comment_reply_get_contexts',

  // Allow this to be enabled or disabled:

    'disabled' => variable_get('page_manager_comment_reply_disabled', TRUE),

    'enable callback' => 'page_manager_comment_reply_enable',

    'access callback' => 'page_manager_comment_reply_check',

  );

}

/**

 * Callback to enable/disable the page from the UI.

 */

function page_manager_comment_reply_enable($cache, $status) {

  variable_set('page_manager_comment_reply_disabled', $status);

  // Set a global flag so that the menu routine knows it needs

  // to set a message if enabling cannot be done.

  if (!$status) {

    $GLOBALS['page_manager_enabling_comment_reply'] = TRUE;

  }

}

/**

 * Entry point for our overridden comment.

 */

function page_manager_comment_reply_page($node, $pid = NULL) {

  // Load my task plugin.

  $task = page_manager_get_task('comment_reply');

  // Load the node into a context.

  ctools_include('context');

  ctools_include('context-task-handler');

  $contexts = ctools_context_handler_get_task_contexts($task, '', array($node, $pid));

  if (array_key_exists('argument_cid_3', $contexts) && $contexts['argument_cid_3']->data->nid != $node->nid) {

    // Attempting to reply to a comment not belonging to the current nid.

    drupal_set_message(t('The comment you are replying to does not exist.'), 'error');

    drupal_goto("node/$node->nid");

  }

  $output = ctools_context_handler_render($task, '', $contexts, array($node, $pid));

  if ($output !== FALSE) {

    return $output;

  }

  $function = 'comment_reply';

  foreach (module_implements('page_manager_override') as $module) {

    $call = $module . '_page_manager_override';

    if (($rc = $call('comment_reply')) && function_exists($rc)) {

      $function = $rc;

      break;

    }

  }

  module_load_include('inc', 'comment', 'comment.pages');

  return $function($node, $pid);

}

/**

 * Callback to get arguments provided by this task handler.

 *

 * Since this is the node view and there is no UI on the arguments, we

 * create dummy arguments that contain the needed data.

 */

function page_manager_comment_reply_get_arguments($task, $subtask_id) {

  return array(

    array(

      'keyword' => 'node',

      'identifier' => t('Node being commented on'),

      'id' => 2,

      'name' => 'entity_id:node',

      'settings' => array(),

    ),

    array(

      'keyword' => 'comment',

      'identifier' => t('Comment being replied to'),

      'id' => 3,

      'name' => 'entity_id:comment',

      'settings' => array(),

    ),

  );

}

/**

 * Callback to get context placeholders provided by this handler.

 */

function page_manager_comment_reply_get_contexts($task, $subtask_id) {

  return ctools_context_get_placeholders_from_argument(page_manager_comment_reply_get_arguments($task, $subtask_id));

}

/**

 * Callback defined by page_manager_node_view_page_manager_tasks().

 *

 * Alter the node view input so that node view comes to us rather than the

 * normal node view process.

 */

function page_manager_comment_reply_menu_alter(&$items, $task) {

  if (variable_get('page_manager_comment_reply_disabled', TRUE)) {

    return;

  }

  // Override the node view handler for our purpose.

  $callback = $items['comment/reply/%node']['page callback'];

  if ($callback == 'comment_reply' || variable_get('page_manager_override_anyway', FALSE)) {

    $items['comment/reply/%node']['page callback'] = 'page_manager_comment_reply_page';

    $items['comment/reply/%node']['file path'] = $task['path'];

    $items['comment/reply/%node']['file'] = $task['file'];

  }

  else {

    // Automatically disable this task if it cannot be enabled.

    variable_set('page_manager_comment_reply_disabled', TRUE);

    if (!empty($GLOBALS['page_manager_enabling_comment_reply'])) {

      drupal_set_message(t('Page manager module is unable to enable comment/reply/%node because some other module already has overridden with %callback.', array('%callback' => $callback)), 'error');

    }

  }

  // @todo override node revision handler as well?

}

/**

 * Callback to determine if a page is accessible.

 *

 * @param $task

 *   The task plugin.

 * @param $subtask_id

 *   The subtask id

 * @param $contexts

 *   The contexts loaded for the task.

 *

 * @return

 *   TRUE if the current user can access the page.

 */

function page_manager_comment_reply_access_check($task, $subtask_id, $contexts) {

  $context = reset($contexts);

  return TRUE;

}