Statum/example/Actions.vala

using Statum;
using Invercargill;
using Invercargill.DataStructures;

namespace Example {

    /**
     * `POST /login` — creates a session-scoped `auth` slot from the submitted
     * name and redirects the client home. The `is_admin` flag is kept in the
     * slot's (encrypted, server-only) private data.
     */
    public class LoginAction : StatumAction {

        public override async Lot<Model.DirectiveDto> handle() throws GLib.Error {
            var name = "guest";
            if (request.form != null) {
                var submitted = request.form.get_field("name");
                if (submitted != null && ((!)submitted).length > 0) {
                    name = (!)submitted;
                }
            }
            var is_admin = name == "admin";

            var auth_public = new PropertyDictionary();
            auth_public.set_native<string>("name", name);
            auth_public.set_native<string>("role", is_admin ? "admin" : "member");

            var auth_private = new PropertyDictionary();
            auth_private.set_native<bool>("is_admin", is_admin);

            var state = new State() {
                type_name = "auth",
                public_data = auth_public,
                private_data = auth_private
            };
            var slot = state_service.new_slot(Scope.SESSION, state);
            var frame = state_service.sign_slot(slot.id);

            var directives = new Series<Model.DirectiveDto>();
            directives.add(new Model.SetDirectiveDto.with_frame((!)frame));
            directives.add(new Model.NavigateDirectiveDto.with_uri("/"));
            return directives;
        }
    }

    /**
     * `POST /logout` — clears the held `auth` slot and redirects home.
     */
    public class LogoutAction : StatumAction {

        public override async Lot<Model.DirectiveDto> handle() throws GLib.Error {
            var directives = new Series<Model.DirectiveDto>();

            HeldSlot auth;
            if (request.held.try_get("auth", out auth)) {
                yield state_service.clear_slot(auth.key);
                directives.add(new Model.ClearDirectiveDto.with_key(auth.key));
            }

            directives.add(new Model.NavigateDirectiveDto.with_uri("/"));
            return directives;
        }
    }
}