WSU Content Visibility

Control the visibility of content for groups of authenticated users.

Overview

WSU Content Visibility provides a general method to control visibility of a private post based on the groups a user belongs to. A default site-member group is provided. Custom code should be used to provide additional group and user associations through the provided hooks.

Existing capabilities in WordPress

The following conditions are true by default in WordPress and are not changed by WSUWP Content Visibility:

All users can view their own private posts.
Subscribers, Contributors, and Authors can not view private posts owned by others.
Editors, Administrators, and Super Admins can view all private posts.

If WSUWP Content Visibility is used to assign a group of viewers to a private post that includes existing site Subscribers, Contributors, or Authors, those users will be able to view that private post. Likewise, if used to assign a group that excludes existing Editors, Administrators, and Super Admins, those users will still be able to view that private post.

Extending WSUWP Content Visibility

Adding and removing post type support

By default, WSU Content Visibility supports posts and pages. Use add_post_type_support( 'post-type-slug', 'wsuwp-content-visibility' ); to add support to your custom post types.

Similarly, remove_post_type_support() can be used to remove existing support for a feature on a post type. Current support is applied on init with a priority of 11.

Filtering available groups

A default list of groups is presented once a post's status has been updated to private. The content_visibility_default_groups filter should be used to add or remove groups on this list.

Expected return format:

array(
    array( 'id' => 'unique-group-id', 'name' => 'A Group Name' ),
    array( 'id' => 'b-unique-group-id', 'name', 'B Group Name' ),
    // etc...
);
}

Filtering user verification

When an authenticated user attempts to view a private post, the user_in_content_visibility_groups filter fires to determine if the user is a member of an assigned group.

The user and a list of group IDs assigned as viewers to the post will be passed to the filter to help in determining view access.

washingtonstateuniversity / WSUWP-Content-Visibility