BP_REST_Group_Membership_Endpoint::prepare_links( WP_User $user, WP_REST_Request $request )

	protected function prepare_links( $user, $request ) {
		$base = sprintf( '/%s/%s/', $this->namespace, $this->rest_base );
		$url  = $base . $user->ID;

		$group_id = ( ( isset( $request['group_id'] ) && ! empty( $request['group_id'] ) ) ? $request['group_id'] : 0 );

		// Entity meta.
		$links = array(
			'self'       => array(
				'href' => rest_url( $url ),
			),
			'collection' => array(
				'href' => rest_url( $base ),
			),
		);

		if ( ! empty( $group_id ) ) {
			$links['group'] = array(
				'embeddable' => true,
				'href'       => rest_url( $this->namespace . '/' . buddypress()->groups->id . '/' . $group_id ),
			);
		}

		/**
		 * Filter links prepared for the REST response.
		 *
		 * @param array $links The prepared links of the REST response.
		 * @param WP_User $user User object.
		 *
		 * @since 0.1.0
		 */
		return apply_filters( 'bp_rest_group_members_prepare_links', $links, $user );
	}