crm.fsf.org/20131203/files/sites/all/modules-new/ctools/page_manager/plugins/tasks/blog.inc

   1 <?php
   2
   3 /**
   4  * Specialized implementation of hook_page_manager_task_tasks(). See api-task.html for
   5  * more information.
   6  */
   7 function page_manager_blog_page_manager_tasks() {
   8   if (!module_exists('blog')) {
   9     return;
  10   }
  11
  12   return array(
  13     // This is a 'page' task and will fall under the page admin UI
  14     'task type' => 'page',
  15
  16     'title' => t('All blogs'),
  17     'admin title' => t('All blogs'),
  18     'admin description' => t('When enabled, this overrides the default Drupal behavior for the all blogs at <em>/blog</em>. If no variant is selected, the default Drupal most recent blog posts will be shown.'),
  19     'admin path' => 'blog',
  20
  21     // Menu hooks so that we can alter the node/%node menu entry to point to us.
  22     'hook menu alter' => 'page_manager_blog_menu_alter',
  23
  24     // This is task uses 'context' handlers and must implement these to give the
  25     // handler data it needs.
  26     'handler type' => 'context',
  27
  28     // Allow this to be enabled or disabled:
  29     'disabled' => variable_get('page_manager_blog_disabled', TRUE),
  30     'enable callback' => 'page_manager_blog_enable',
  31     'access callback' => 'page_manager_blog_access_check',
  32   );
  33 }
  34
  35 /**
  36  * Callback defined by page_manager_blog_page_manager_tasks().
  37  *
  38  * Alter the node edit input so that node edit comes to us rather than the
  39  * normal node edit process.
  40  */
  41 function page_manager_blog_menu_alter(&$items, $task) {
  42   if (variable_get('page_manager_blog_disabled', TRUE)) {
  43     return;
  44   }
  45
  46   $callback = $items['blog']['page callback'];
  47   // Override the node edit handler for our purpose.
  48   if ($callback == 'blog_page_last' || variable_get('page_manager_override_anyway', FALSE)) {
  49     $items['blog']['page callback'] = 'page_manager_blog';
  50     $items['blog']['file path'] = $task['path'];
  51     $items['blog']['file'] = $task['file'];
  52   }
  53   else {
  54     variable_set('page_manager_blog_disabled', TRUE);
  55     if (!empty($GLOBALS['page_manager_enabling_blog'])) {
  56       drupal_set_message(t('Page manager module is unable to enable blog because some other module already has overridden with %callback.', array('%callback' => $callback)), 'warning');
  57     }
  58     return;
  59   }
  60
  61 }
  62
  63 /**
  64  * Entry point for our overridden node edit.
  65  *
  66  * This function asks its assigned handlers who, if anyone, would like
  67  * to run with it. If no one does, it passes through to Drupal core's
  68  * node edit, which is node_page_edit().
  69  */
  70 function page_manager_blog() {
  71   // Load my task plugin
  72   $task = page_manager_get_task('blog');
  73
  74   ctools_include('context');
  75   ctools_include('context-task-handler');
  76   $output = ctools_context_handler_render($task, '', array(), array());
  77   if ($output !== FALSE) {
  78     return $output;
  79   }
  80
  81   module_load_include('inc', 'blog', 'blog.pages');
  82   $function = 'blog_page_last';
  83   foreach (module_implements('page_manager_override') as $module) {
  84     $call = $module . '_page_manager_override';
  85     if (($rc = $call('blog')) && function_exists($rc)) {
  86       $function = $rc;
  87       break;
  88     }
  89   }
  90
  91   // Otherwise, fall back.
  92   return $function();
  93 }
  94
  95 /**
  96  * Callback to enable/disable the page from the UI.
  97  */
  98 function page_manager_blog_enable($cache, $status) {
  99   variable_set('page_manager_blog_disabled', $status);
 100   // Set a global flag so that the menu routine knows it needs
 101   // to set a message if enabling cannot be done.
 102   if (!$status) {
 103     $GLOBALS['page_manager_enabling_blog'] = TRUE;
 104   }
 105 }
 106
 107 /**
 108  * Callback to determine if a page is accessible.
 109  *
 110  * @param $task
 111  *   The task plugin.
 112  * @param $subtask_id
 113  *   The subtask id
 114  * @param $contexts
 115  *   The contexts loaded for the task.
 116  * @return
 117  *   TRUE if the current user can access the page.
 118  */
 119 function page_manager_blog_access_check($task, $subtask_id, $contexts) {
 120   return user_access('access content');
 121 }