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   1  <?php
   2  // $Id: blog_user.inc,v 1.1.2.2 2009/10/13 18:12:20 merlinofchaos Exp $
   3  
   4  /**
   5   * Specialized implementation of hook_page_manager_task_tasks(). See api-task.html for
   6   * more information.
   7   */
   8  function page_manager_blog_user_page_manager_tasks() {
   9    if (!module_exists('blog')) {
  10      return;
  11    }
  12  
  13    return array(
  14      // This is a 'page' task and will fall under the page admin UI
  15      'task type' => 'page',
  16      'title' => t('User blog'),
  17      'admin title' => t('User blog'),
  18      'admin description' => t('When enabled, this overrides the default Drupal behavior for displaying user blogs at <em>blog/%user</em>. If no variant is selected, the default Drupal user blog will be used.'),
  19      'admin path' => 'blog/%user',
  20  
  21      // Callback to add items to the page managertask administration form:
  22      'task admin' => 'page_manager_blog_user_task_admin',
  23  
  24      'hook menu alter' => 'page_manager_blog_user_menu_alter',
  25  
  26      // This is task uses 'context' handlers and must implement these to give the
  27      // handler data it needs.
  28      'handler type' => 'context', // handler type -- misnamed
  29      'get arguments' => 'page_manager_blog_user_get_arguments',
  30      'get context placeholders' => 'page_manager_blog_user_get_contexts',
  31  
  32      // Allow this to be enabled or disabled:
  33      'disabled' => variable_get('page_manager_blog_user_disabled', TRUE),
  34      'enable callback' => 'page_manager_blog_user_enable',
  35    );
  36  }
  37  
  38  /**
  39   * Callback defined by page_manager_blog_user_page_manager_tasks().
  40   *
  41   * Alter the user view input so that user view comes to us rather than the
  42   * normal user view process.
  43   */
  44  function page_manager_blog_user_menu_alter(&$items, $task) {
  45    if (variable_get('page_manager_blog_user_disabled', TRUE)) {
  46      return;
  47    }
  48  
  49    // Override the user view handler for our purpose.
  50    if ($items['blog/%user_uid_optional']['page callback'] == 'blog_page_user' || variable_get('page_manager_override_anyway', FALSE)) {
  51      $items['blog/%user_uid_optional']['page callback'] = 'page_manager_blog_user';
  52      $items['blog/%user_uid_optional']['file path'] = $task['path'];
  53      $items['blog/%user_uid_optional']['file'] = $task['file'];
  54    }
  55    else {
  56      // automatically disable this task if it cannot be enabled.
  57      variable_set('page_manager_blog_user_disabled', TRUE);
  58      if (!empty($GLOBALS['page_manager_enabling_blog_user'])) {
  59        drupal_set_message(t('Page manager module is unable to enable blog/%user because some other module already has overridden with %callback.', array('%callback' => $items['blog/%user']['page callback'])), 'error');
  60      }
  61    }
  62  }
  63  
  64  /**
  65   * Entry point for our overridden user view.
  66   *
  67   * This function asks its assigned handlers who, if anyone, would like
  68   * to run with it. If no one does, it passes through to Drupal core's
  69   * user view, which is user_page_view().
  70   */
  71  function page_manager_blog_user($account) {
  72    // Load my task plugin:
  73    $task = page_manager_get_task('blog_user');
  74  
  75    // Load the account into a context.
  76    ctools_include('context');
  77    ctools_include('context-task-handler');
  78    $contexts = ctools_context_handler_get_task_contexts($task, '', array($account));
  79  
  80    $output = ctools_context_handler_render($task, '', $contexts, array($account->uid));
  81    if ($output !== FALSE) {
  82      return $output;
  83    }
  84  
  85    module_load_include('inc', 'blog', 'blog.pages');
  86    $function = 'blog_page_user';
  87    foreach (module_implements('page_manager_override') as $module) {
  88      $call = $module . '_page_manager_override';
  89      if (($rc = $call('blog_user')) && function_exists($rc)) {
  90        $function = $rc;
  91        break;
  92      }
  93    }
  94  
  95    // Otherwise, fall back.
  96    return $function($account);
  97  }
  98  
  99  /**
 100   * Callback to get arguments provided by this task handler.
 101   *
 102   * Since this is the node view and there is no UI on the arguments, we
 103   * create dummy arguments that contain the needed data.
 104   */
 105  function page_manager_blog_user_get_arguments($task, $subtask_id) {
 106    return array(
 107      array(
 108        'keyword' => 'user',
 109        'identifier' => t('User being viewed'),
 110        'id' => 1,
 111        'name' => 'uid',
 112        'settings' => array(),
 113      ),
 114    );
 115  }
 116  
 117  /**
 118   * Callback to get context placeholders provided by this handler.
 119   */
 120  function page_manager_blog_user_get_contexts($task, $subtask_id) {
 121    return ctools_context_get_placeholders_from_argument(page_manager_blog_user_get_arguments($task, $subtask_id));
 122  }
 123  
 124  /**
 125   * Callback to enable/disable the page from the UI.
 126   */
 127  function page_manager_blog_user_enable($cache, $status) {
 128    variable_set('page_manager_blog_user_disabled', $status);
 129  
 130    // Set a global flag so that the menu routine knows it needs
 131    // to set a message if enabling cannot be done.
 132    if (!$status) {
 133      $GLOBALS['page_manager_enabling_blog_user'] = TRUE;
 134    }
 135  }