blog_user.inc

<?php


/**
 * @file
 */

/**
 * 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);
}