bp_groups_filter_media_scope( array $retval = array(), array $filter = array() )

function bp_groups_filter_media_scope( $retval = array(), $filter = array() ) {

	// Determine the user_id.
	if ( ! empty( $filter['user_id'] ) ) {
		$user_id = $filter['user_id'];
	} else {
		$user_id = bp_displayed_user_id()
			? bp_displayed_user_id()
			: bp_loggedin_user_id();
	}

	if ( 'groups' !== $filter['scope'] ) {
		// Fetch public groups.
		$public_groups = groups_get_groups( array(
			'fields'   => 'ids',
			'status'   => 'public',
			'per_page' => - 1,
		) );
	}
	if ( ! empty( $public_groups['groups'] ) ) {
		$public_groups = $public_groups['groups'];
	} else {
		$public_groups = array();
	}

	// Determine groups of user.
	$groups = groups_get_user_groups( $user_id );
	if ( ! empty( $groups['groups'] ) ) {
		$groups = $groups['groups'];
	} else {
		$groups = array();
	}

	$group_ids = false;
	if ( ! empty( $groups ) && ! empty( $public_groups ) ) {
		$group_ids = array( 'groups' => array_unique( array_merge( $groups, $public_groups ) ) );
	} elseif ( empty( $groups ) && ! empty( $public_groups ) ) {
		$group_ids = array( 'groups' => $public_groups );
	} elseif ( ! empty( $groups ) && empty( $public_groups ) ) {
		$group_ids = array( 'groups' => $groups );
	}

	if ( empty( $group_ids ) ) {
		$group_ids = array( 'groups' => 0 );
	}

	$args = array(
		'relation' => 'AND',
		array(
			'column'  => 'group_id',
			'compare' => 'IN',
			'value'   => (array) $group_ids['groups'],
		),
		array(
			'column' => 'privacy',
			'value'  => 'grouponly',
		),
	);

	if ( ! bp_is_group_albums_support_enabled() ) {
		$args[] = array(
			'column'  => 'album_id',
			'compare' => '=',
			'value'   => '0',
		);
	}

	if ( ! empty( $filter['search_terms'] ) ) {
		$args[] = array(
			'column'  => 'title',
			'compare' => 'LIKE',
			'value'   => $filter['search_terms'],
		);
	}

	$retval = array(
		'relation' => 'OR',
		$args
	);

	return $retval;
}