public function setup_canonical_stack() {
		$bp = buddypress();

		/** Default Profile Component ****************************************
		 */
		if ( bp_displayed_user_has_front_template() ) {
			$bp->default_component = 'front';
		} elseif ( bp_is_active( 'activity' ) && isset( $bp->pages->activity ) ) {
			$bp->default_component = bp_get_activity_slug();
		} else {
			$bp->default_component = ( 'xprofile' === $bp->profile->id ) ? 'profile' : $bp->profile->id;
		}

		if ( defined( 'BP_DEFAULT_COMPONENT' ) && BP_DEFAULT_COMPONENT ) {
			$default_component = BP_DEFAULT_COMPONENT;
			if ( 'profile' === $default_component ) {
				$default_component = 'xprofile';
			}

			if ( bp_is_active( $default_component ) ) {
				$bp->default_component = BP_DEFAULT_COMPONENT;
			}
		}

		/** Canonical Component Stack ****************************************
		 */

		if ( bp_displayed_user_id() ) {
			$bp->canonical_stack['base_url'] = bp_displayed_user_domain();

			if ( bp_current_component() ) {
				$bp->canonical_stack['component'] = bp_current_component();
			}

			if ( bp_current_action() ) {
				$bp->canonical_stack['action'] = bp_current_action();
			}

			if ( !empty( $bp->action_variables ) ) {
				$bp->canonical_stack['action_variables'] = bp_action_variables();
			}

			// Looking at the single member root/home, so assume the default.
			if ( ! bp_current_component() ) {
				$bp->current_component = $bp->default_component;

			// The canonical URL will not contain the default component.
			} elseif ( bp_is_current_component( $bp->default_component ) && ! bp_current_action() ) {
				unset( $bp->canonical_stack['component'] );
			}

			// If we're on a spammer's profile page, only users with the 'bp_moderate' cap
			// can view subpages on the spammer's profile.
			//
			// users without the cap trying to access a spammer's subnav page will get
			// redirected to the root of the spammer's profile page.  this occurs by
			// by removing the component in the canonical stack.
			if ( bp_is_user_spammer( bp_displayed_user_id() ) && ! bp_current_user_can( 'bp_moderate' ) ) {
				unset( $bp->canonical_stack['component'] );
			}
		}
	}