Add backend foundation and config-driven workbench

backend/internal/service/event_play_service.go

@@ -0,0 +1,131 @@
+package service
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"cmr-backend/internal/apperr"
+	"cmr-backend/internal/store/postgres"
+)
+
+type EventPlayService struct {
+	store *postgres.Store
+}
+
+type EventPlayInput struct {
+	EventPublicID string
+	UserID        string
+}
+
+type EventPlayResult struct {
+	Event struct {
+		ID          string  `json:"id"`
+		Slug        string  `json:"slug"`
+		DisplayName string  `json:"displayName"`
+		Summary     *string `json:"summary,omitempty"`
+		Status      string  `json:"status"`
+	} `json:"event"`
+	Release *struct {
+		ID                     string  `json:"id"`
+		ConfigLabel            string  `json:"configLabel"`
+		ManifestURL            string  `json:"manifestUrl"`
+		ManifestChecksumSha256 *string `json:"manifestChecksumSha256,omitempty"`
+		RouteCode              *string `json:"routeCode,omitempty"`
+	} `json:"release,omitempty"`
+	ResolvedRelease *ResolvedReleaseView `json:"resolvedRelease,omitempty"`
+	Play            struct {
+		CanLaunch      bool                 `json:"canLaunch"`
+		PrimaryAction  string               `json:"primaryAction"`
+		Reason         string               `json:"reason"`
+		LaunchSource   string               `json:"launchSource,omitempty"`
+		OngoingSession *EntrySessionSummary `json:"ongoingSession,omitempty"`
+		RecentSession  *EntrySessionSummary `json:"recentSession,omitempty"`
+	} `json:"play"`
+}
+
+func NewEventPlayService(store *postgres.Store) *EventPlayService {
+	return &EventPlayService{store: store}
+}
+
+func (s *EventPlayService) GetEventPlay(ctx context.Context, input EventPlayInput) (*EventPlayResult, error) {
+	input.EventPublicID = strings.TrimSpace(input.EventPublicID)
+	input.UserID = strings.TrimSpace(input.UserID)
+	if input.EventPublicID == "" {
+		return nil, apperr.New(http.StatusBadRequest, "invalid_params", "event id is required")
+	}
+	if input.UserID == "" {
+		return nil, apperr.New(http.StatusUnauthorized, "unauthorized", "user is required")
+	}
+
+	event, err := s.store.GetEventByPublicID(ctx, input.EventPublicID)
+	if err != nil {
+		return nil, err
+	}
+	if event == nil {
+		return nil, apperr.New(http.StatusNotFound, "event_not_found", "event not found")
+	}
+
+	sessions, err := s.store.ListSessionsByUserAndEvent(ctx, input.UserID, event.ID, 10)
+	if err != nil {
+		return nil, err
+	}
+
+	result := &EventPlayResult{}
+	result.Event.ID = event.PublicID
+	result.Event.Slug = event.Slug
+	result.Event.DisplayName = event.DisplayName
+	result.Event.Summary = event.Summary
+	result.Event.Status = event.Status
+	if event.CurrentReleasePubID != nil && event.ConfigLabel != nil && event.ManifestURL != nil {
+		result.Release = &struct {
+			ID                     string  `json:"id"`
+			ConfigLabel            string  `json:"configLabel"`
+			ManifestURL            string  `json:"manifestUrl"`
+			ManifestChecksumSha256 *string `json:"manifestChecksumSha256,omitempty"`
+			RouteCode              *string `json:"routeCode,omitempty"`
+		}{
+			ID:                     *event.CurrentReleasePubID,
+			ConfigLabel:            *event.ConfigLabel,
+			ManifestURL:            *event.ManifestURL,
+			ManifestChecksumSha256: event.ManifestChecksum,
+			RouteCode:              event.RouteCode,
+		}
+	}
+	result.ResolvedRelease = buildResolvedReleaseFromEvent(event, LaunchSourceEventCurrentRelease)
+
+	if len(sessions) > 0 {
+		recent := buildEntrySessionSummary(&sessions[0])
+		result.Play.RecentSession = &recent
+	}
+	for i := range sessions {
+		if sessions[i].Status == "launched" || sessions[i].Status == "running" {
+			ongoing := buildEntrySessionSummary(&sessions[i])
+			result.Play.OngoingSession = &ongoing
+			break
+		}
+	}
+
+	canLaunch := event.Status == "active" && event.CurrentReleaseID != nil && event.ManifestURL != nil
+	result.Play.CanLaunch = canLaunch
+	if canLaunch {
+		result.Play.LaunchSource = LaunchSourceEventCurrentRelease
+	}
+
+	switch {
+	case result.Play.OngoingSession != nil:
+		result.Play.PrimaryAction = "continue"
+		result.Play.Reason = "user has an ongoing session for this event"
+	case canLaunch:
+		result.Play.PrimaryAction = "start"
+		result.Play.Reason = "event is active and launchable"
+	case result.Play.RecentSession != nil:
+		result.Play.PrimaryAction = "review_last_result"
+		result.Play.Reason = "event is not launchable, but user has previous session history"
+	default:
+		result.Play.PrimaryAction = "unavailable"
+		result.Play.Reason = "event is not launchable"
+	}
+
+	return result, nil
+}