feat: game lobby service

2026-04-25 23:20:55 +02:00
parent 32dc29359a
commit 48b0056b49
336 changed files with 57074 additions and 1418 deletions
@@ -0,0 +1,216 @@
+// Package rejectapplication implements the `lobby.application.reject`
+// message type. It transitions the application from submitted to
+// rejected, defensively releases any race name reservation held for
+// the applicant in the game, and publishes the
+// `lobby.membership.rejected` notification intent.
+package rejectapplication
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log/slog"
+	"time"
+
+	"galaxy/lobby/internal/domain/application"
+	"galaxy/lobby/internal/domain/common"
+	"galaxy/lobby/internal/logging"
+	"galaxy/lobby/internal/ports"
+	"galaxy/lobby/internal/service/shared"
+	"galaxy/lobby/internal/telemetry"
+	"galaxy/notificationintent"
+)
+
+// Service executes the public-game application rejection use case.
+type Service struct {
+	games        ports.GameStore
+	applications ports.ApplicationStore
+	directory    ports.RaceNameDirectory
+	intents      ports.IntentPublisher
+	clock        func() time.Time
+	logger       *slog.Logger
+	telemetry    *telemetry.Runtime
+}
+
+// Dependencies groups the collaborators used by Service.
+type Dependencies struct {
+	// Games loads the game record so the rejection intent can carry
+	// the human-readable game_name for display.
+	Games ports.GameStore
+
+	// Applications applies the submitted → rejected transition.
+	Applications ports.ApplicationStore
+
+	// Directory releases any reservation held for the applicant in
+	// the game (no-op when none exists).
+	Directory ports.RaceNameDirectory
+
+	// Intents publishes the lobby.membership.rejected intent.
+	Intents ports.IntentPublisher
+
+	// Clock supplies the wall-clock used for DecidedAt and the
+	// notification's OccurredAt.
+	Clock func() time.Time
+
+	// Logger records structured service-level events.
+	Logger *slog.Logger
+
+	// Telemetry records the `lobby.application.outcomes` counter on
+	// each rejection. Optional; nil disables metric emission.
+	Telemetry *telemetry.Runtime
+}
+
+// NewService constructs one Service with deps.
+func NewService(deps Dependencies) (*Service, error) {
+	switch {
+	case deps.Games == nil:
+		return nil, errors.New("new reject application service: nil game store")
+	case deps.Applications == nil:
+		return nil, errors.New("new reject application service: nil application store")
+	case deps.Directory == nil:
+		return nil, errors.New("new reject application service: nil race name directory")
+	case deps.Intents == nil:
+		return nil, errors.New("new reject application service: nil intent publisher")
+	}
+	clock := deps.Clock
+	if clock == nil {
+		clock = time.Now
+	}
+	logger := deps.Logger
+	if logger == nil {
+		logger = slog.Default()
+	}
+	return &Service{
+		games:        deps.Games,
+		applications: deps.Applications,
+		directory:    deps.Directory,
+		intents:      deps.Intents,
+		clock:        clock,
+		logger:       logger.With("service", "lobby.rejectapplication"),
+		telemetry:    deps.Telemetry,
+	}, nil
+}
+
+// Input stores the arguments required to reject one application.
+type Input struct {
+	// Actor identifies the caller. Must be ActorKindAdmin.
+	Actor shared.Actor
+
+	// GameID identifies the game referenced by the request path; it
+	// must match the loaded application's GameID.
+	GameID common.GameID
+
+	// ApplicationID identifies the target application.
+	ApplicationID common.ApplicationID
+}
+
+// Handle authorizes the actor, validates the application state,
+// transitions the application to rejected, releases any held
+// reservation, and publishes the lobby.membership.rejected intent on
+// success.
+func (service *Service) Handle(ctx context.Context, input Input) (application.Application, error) {
+	if service == nil {
+		return application.Application{}, errors.New("reject application: nil service")
+	}
+	if ctx == nil {
+		return application.Application{}, errors.New("reject application: nil context")
+	}
+	if err := input.Actor.Validate(); err != nil {
+		return application.Application{}, fmt.Errorf("reject application: actor: %w", err)
+	}
+	if !input.Actor.IsAdmin() {
+		return application.Application{}, fmt.Errorf(
+			"%w: only admin callers may reject applications",
+			shared.ErrForbidden,
+		)
+	}
+	if err := input.GameID.Validate(); err != nil {
+		return application.Application{}, fmt.Errorf("reject application: %w", err)
+	}
+	if err := input.ApplicationID.Validate(); err != nil {
+		return application.Application{}, fmt.Errorf("reject application: %w", err)
+	}
+
+	app, err := service.applications.Get(ctx, input.ApplicationID)
+	if err != nil {
+		return application.Application{}, fmt.Errorf("reject application: %w", err)
+	}
+	if app.GameID != input.GameID {
+		return application.Application{}, fmt.Errorf(
+			"reject application: application %q does not belong to game %q: %w",
+			app.ApplicationID, input.GameID, application.ErrNotFound,
+		)
+	}
+	if app.Status != application.StatusSubmitted {
+		return application.Application{}, fmt.Errorf(
+			"reject application: status %q is not %q: %w",
+			app.Status, application.StatusSubmitted, application.ErrConflict,
+		)
+	}
+
+	gameRecord, err := service.games.Get(ctx, input.GameID)
+	if err != nil {
+		return application.Application{}, fmt.Errorf("reject application: %w", err)
+	}
+
+	now := service.clock().UTC()
+	if err := service.applications.UpdateStatus(ctx, ports.UpdateApplicationStatusInput{
+		ApplicationID: app.ApplicationID,
+		ExpectedFrom:  application.StatusSubmitted,
+		To:            application.StatusRejected,
+		At:            now,
+	}); err != nil {
+		return application.Application{}, fmt.Errorf("reject application: %w", err)
+	}
+
+	if err := service.directory.ReleaseReservation(ctx, gameRecord.GameID.String(), app.ApplicantUserID, app.RaceName); err != nil {
+		// The directory contract states ReleaseReservation is a no-op
+		// for missing / mismatched / invalid records, so a non-nil
+		// error here is unexpected. Log and proceed — the
+		// application is already rejected.
+		service.logger.WarnContext(ctx, "release reservation on reject",
+			"application_id", app.ApplicationID.String(),
+			"err", err.Error(),
+		)
+	}
+
+	intent, err := notificationintent.NewLobbyMembershipRejectedIntent(
+		notificationintent.Metadata{
+			IdempotencyKey: "lobby.membership.rejected:" + app.ApplicationID.String(),
+			OccurredAt:     now,
+		},
+		app.ApplicantUserID,
+		notificationintent.LobbyMembershipRejectedPayload{
+			GameID:   gameRecord.GameID.String(),
+			GameName: gameRecord.GameName,
+		},
+	)
+	if err != nil {
+		service.logger.ErrorContext(ctx, "build membership rejected intent",
+			"application_id", app.ApplicationID.String(),
+			"err", err.Error(),
+		)
+	} else if _, publishErr := service.intents.Publish(ctx, intent); publishErr != nil {
+		service.logger.WarnContext(ctx, "publish membership rejected intent",
+			"application_id", app.ApplicationID.String(),
+			"err", publishErr.Error(),
+		)
+	}
+
+	rejected, err := service.applications.Get(ctx, app.ApplicationID)
+	if err != nil {
+		return application.Application{}, fmt.Errorf("reject application: %w", err)
+	}
+
+	service.telemetry.RecordApplicationOutcome(ctx, "rejected")
+
+	logArgs := []any{
+		"game_id", gameRecord.GameID.String(),
+		"game_status", string(gameRecord.Status),
+		"application_id", app.ApplicationID.String(),
+		"user_id", app.ApplicantUserID,
+	}
+	logArgs = append(logArgs, logging.ContextAttrs(ctx)...)
+	service.logger.InfoContext(ctx, "application rejected", logArgs...)
+	return rejected, nil
+}