BP_Core_Members_Switching::action_init()

	public function action_init() {

		if ( ! isset( $_REQUEST['action'] ) ) {
			return;
		}

		$current_user = ( is_user_logged_in() ) ? wp_get_current_user() : null;

		switch ( $_REQUEST['action'] ) {

			// We're attempting to switch to another user:
			case 'switch_to_user':
				if ( isset( $_REQUEST['user_id'] ) ) {
					$user_id = absint( $_REQUEST['user_id'] );
				} else {
					$user_id = 0;
				}

				// Check authentication:
				$old_user = bp_current_member_switched();
				if ( ! current_user_can( 'switch_to_user', $user_id ) && ( ! $old_user || ! user_can( $old_user, 'switch_to_user' ) ) ) {
					wp_die( esc_html__( 'Could not switch users.', 'buddyboss' ) );
				}

				// Check intent:
				check_admin_referer( "switch_to_user_{$user_id}" );

				// Switch user:
				$user = bp_member_switch_to( $user_id, self::remember() );
				if ( $user ) {
					$redirect_to = $_GET['redirect_to'] ?: self::get_redirect( $user, $current_user );

					// Redirect to the dashboard or the home URL depending on capabilities:
					$args = array(
						'user_switched' => 'true',
					);

					if ( $redirect_to ) {
						wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application );
					} elseif ( ! current_user_can( 'read' ) ) {
						wp_safe_redirect( add_query_arg( $args, home_url() ), 302, self::$application );
					} else {
						wp_safe_redirect( add_query_arg( $args, admin_url() ), 302, self::$application );
					}
					exit;
				} else {
					wp_die( esc_html__( 'Could not switch users.', 'buddyboss' ) );
				}
				break;

			// We're attempting to switch back to the originating user:
			case 'switch_to_olduser':
				// Fetch the originating user data:
				$old_user = self::get_old_user();
				if ( ! $old_user ) {
					wp_die( esc_html__( 'Could not switch users.', 'buddyboss' ) );
				}

				// Check authentication:
				if ( ! self::authenticate_old_user( $old_user ) ) {
					wp_die( esc_html__( 'Could not switch users.', 'buddyboss' ) );
				}

				// Check intent:
				check_admin_referer( "switch_to_olduser_{$old_user->ID}" );

				// Switch user:
				if ( bp_member_switch_to( $old_user->ID, self::remember(), false ) ) {

					if ( ! empty( $_REQUEST['interim-login'] ) ) {
						$GLOBALS['interim_login'] = 'success'; // @codingStandardsIgnoreLine
						login_header( '', '' );
						exit;
					}

					$redirect_to = self::get_redirect( $old_user, $current_user );
					$args        = array(
						'user_switched' => 'true',
						'switched_back' => 'true',
					);

					if ( $redirect_to ) {
						wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application );
					} else {
						wp_safe_redirect( add_query_arg( $args, admin_url( 'users.php' ) ), 302, self::$application );
					}
					exit;
				} else {
					wp_die( esc_html__( 'Could not switch users.', 'buddyboss' ) );
				}
				break;

		}
	}