function bbp_map_primary_meta_caps( $caps = array(), $cap = '', $user_id = 0, $args = array() ) {

	// What capability is being checked?
	switch ( $cap ) {
		case 'spectate' :

			// Do not allow inactive users.
			if ( bbp_is_user_inactive( $user_id ) ) {
				$caps = array( 'do_not_allow' );

			// Default to the current cap.
			} else {
				$caps = array( $cap );
			}
			break;

		case 'participate' :

			// Do not allow inactive users.
			if ( bbp_is_user_inactive( $user_id ) ) {
				$caps = array( 'do_not_allow' );

			// Default to the current cap.
			} else {
				$caps = array( $cap );
			}
			break;

		case 'moderate' :

			// Do not allow inactive users.
			if ( bbp_is_user_inactive( $user_id ) ) {
				$caps = array( 'do_not_allow' );

			// Keymasters can always moderate.
			} elseif ( bbp_is_user_keymaster( $user_id ) ) {
				$caps = array( 'spectate' );

			// Check if user can moderate forum.
			} elseif ( bbp_allow_forum_mods() ) {
				$caps = array( $cap );

				// Bail if no post to check.
				if ( empty( $args[0] ) ) {
					break;
				}

				// Get the post.
				$_post = get_post( $args[0] );
				if ( empty( $_post ) ) {
					break;
				}

				// Get forum ID for specific type of post.
				switch ( $_post->post_type ) {

					// Forum.
					case bbp_get_forum_post_type() :
						$forum_id = bbp_get_forum_id( $_post->ID );
						break;

					// Topic.
					case bbp_get_topic_post_type() :
						$forum_id = bbp_get_topic_forum_id( $_post->ID );
						break;

					// Reply.
					case bbp_get_reply_post_type() :
						$forum_id = bbp_get_reply_forum_id( $_post->ID );
						break;

					// Any other post type defaults to 0.
					default :
						$forum_id = 0;
						break;
				}

				// Bail if no forum ID.
				if ( empty( $forum_id ) ) {
					break;
				}

				// User is mod of this forum
				if ( bbp_is_object_of_user( $forum_id, $user_id, '_bbp_moderator_id' ) ) {
					$caps = array( 'spectate' );
				}
			}

			break;

		/** Super Moderators **************************************************/

		case 'edit_user'  :
		case 'edit_users' :

			// Moderators can edit users if super moderators is enabled
			if ( bbp_allow_super_mods() ) {

				// Get the user ID
				$_user_id = ! empty( $args[0] )
					? (int) $args[0]
					: bbp_get_displayed_user_id();

				// Users can always edit themselves, so only map for others
				if ( ! empty( $_user_id ) && ( $_user_id !== $user_id ) ) {

					// Super moderators cannot edit keymasters
					if ( ! bbp_is_user_keymaster( $_user_id ) ) {
						$caps = array( 'moderate' );
					}
				}
			}

			break;
	}

	// Filter & return
	return (array) apply_filters( 'bbp_map_primary_meta_caps', $caps, $cap, $user_id, $args );
}