comparison sites/all/modules/ctools/page_manager/plugins/tasks/blog_user.inc @ 0:ff03f76ab3fe

initial version

+<?php
+
+/**
+ * Specialized implementation of hook_page_manager_task_tasks(). See api-task.html for
+ * more information.
+ */
+function page_manager_blog_user_page_manager_tasks() {
+  if (!module_exists('blog')) {
+    return;
+  }
+
+  return array(
+    // This is a 'page' task and will fall under the page admin UI
+    'task type' => 'page',
+    'title' => t('User blog'),
+    'admin title' => t('User blog'),
+    '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.'),
+    'admin path' => 'blog/%user',
+
+    // Callback to add items to the page managertask administration form:
+    'task admin' => 'page_manager_blog_user_task_admin',
+
+    'hook menu alter' => 'page_manager_blog_user_menu_alter',
+
+    // This is task uses 'context' handlers and must implement these to give the
+    // handler data it needs.
+    'handler type' => 'context', // handler type -- misnamed
+    'get arguments' => 'page_manager_blog_user_get_arguments',
+    'get context placeholders' => 'page_manager_blog_user_get_contexts',
+
+    // Allow this to be enabled or disabled:
+    'disabled' => variable_get('page_manager_blog_user_disabled', TRUE),
+    'enable callback' => 'page_manager_blog_user_enable',
+    'access callback' => 'page_manager_blog_user_access_check',
+  );
+}
+
+/**
+ * Callback defined by page_manager_blog_user_page_manager_tasks().
+ *
+ * Alter the user view input so that user view comes to us rather than the
+ * normal user view process.
+ */
+function page_manager_blog_user_menu_alter(&$items, $task) {
+  if (variable_get('page_manager_blog_user_disabled', TRUE)) {
+    return;
+  }
+
+  // Override the user view handler for our purpose.
+  if ($items['blog/%user_uid_optional']['page callback'] == 'blog_page_user' || variable_get('page_manager_override_anyway', FALSE)) {
+    $items['blog/%user_uid_optional']['page callback'] = 'page_manager_blog_user';
+    $items['blog/%user_uid_optional']['file path'] = $task['path'];
+    $items['blog/%user_uid_optional']['file'] = $task['file'];
+  }
+  else {
+    // automatically disable this task if it cannot be enabled.
+    variable_set('page_manager_blog_user_disabled', TRUE);
+    if (!empty($GLOBALS['page_manager_enabling_blog_user'])) {
+      drupal_set_message(t('Page manager module is unable to enable blog/%user because some other module already has overridden with %callback.', array('%callback' => $items['blog/%user']['page callback'])), 'error');
+    }
+  }
+}
+
+/**
+ * Entry point for our overridden user view.
+ *
+ * This function asks its assigned handlers who, if anyone, would like
+ * to run with it. If no one does, it passes through to Drupal core's
+ * user view, which is user_page_view().
+ */
+function page_manager_blog_user($account) {
+  // Load my task plugin:
+  $task = page_manager_get_task('blog_user');
+
+  // Load the account into a context.
+  ctools_include('context');
+  ctools_include('context-task-handler');
+  $contexts = ctools_context_handler_get_task_contexts($task, '', array($account));
+
+  $output = ctools_context_handler_render($task, '', $contexts, array($account->uid));
+  if ($output !== FALSE) {
+    return $output;
+  }
+
+  module_load_include('inc', 'blog', 'blog.pages');
+  $function = 'blog_page_user';
+  foreach (module_implements('page_manager_override') as $module) {
+    $call = $module . '_page_manager_override';
+    if (($rc = $call('blog_user')) && function_exists($rc)) {
+      $function = $rc;
+      break;
+    }
+  }
+
+  // Otherwise, fall back.
+  return $function($account);
+}
+
+/**
+ * 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_blog_user_get_arguments($task, $subtask_id) {
+  return array(
+    array(
+      'keyword' => 'user',
+      'identifier' => t('User being viewed'),
+      'id' => 1,
+      'name' => 'uid',
+      'settings' => array(),
+    ),
+  );
+}
+
+/**
+ * Callback to get context placeholders provided by this handler.
+ */
+function page_manager_blog_user_get_contexts($task, $subtask_id) {
+  return ctools_context_get_placeholders_from_argument(page_manager_blog_user_get_arguments($task, $subtask_id));
+}
+
+/**
+ * Callback to enable/disable the page from the UI.
+ */
+function page_manager_blog_user_enable($cache, $status) {
+  variable_set('page_manager_blog_user_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_blog_user'] = TRUE;
+  }
+}
+
+/**
+ * Callback to determine if a page is accessible.
+ *
+ * @param $task
+ *   The task plugin.
+ * @param $subtask_id
+ *   The subtask id
+ * @param $contexts
+ *   The contexts loaded for the task.
+ * @return
+ *   TRUE if the current user can access the page.
+ */
+function page_manager_blog_user_access_check($task, $subtask_id, $contexts) {
+  $context = reset($contexts);
+  return blog_page_user_access($context->data);
+}