add initial stuff

internal/session/session.go

@@ -0,0 +1,116 @@
+package session
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+	"github.com/kujtimiihoxha/termai/internal/db"
+	"github.com/kujtimiihoxha/termai/internal/pubsub"
+)
+
+type Session struct {
+	ID           string
+	Title        string
+	MessageCount int64
+	Tokens       int64
+	Cost         float64
+	CreatedAt    int64
+	UpdatedAt    int64
+}
+
+type Service interface {
+	pubsub.Suscriber[Session]
+	Create(title string) (Session, error)
+	Get(id string) (Session, error)
+	List() ([]Session, error)
+	Save(session Session) (Session, error)
+	Delete(id string) error
+}
+
+type service struct {
+	*pubsub.Broker[Session]
+	q   db.Querier
+	ctx context.Context
+}
+
+func (s *service) Create(title string) (Session, error) {
+	dbSession, err := s.q.CreateSession(s.ctx, db.CreateSessionParams{
+		ID:    uuid.New().String(),
+		Title: title,
+	})
+	if err != nil {
+		return Session{}, err
+	}
+	session := s.fromDBItem(dbSession)
+	s.Publish(pubsub.CreatedEvent, session)
+	return session, nil
+}
+
+func (s *service) Delete(id string) error {
+	session, err := s.Get(id)
+	if err != nil {
+		return err
+	}
+	err = s.q.DeleteSession(s.ctx, session.ID)
+	if err != nil {
+		return err
+	}
+	s.Publish(pubsub.DeletedEvent, session)
+	return nil
+}
+
+func (s *service) Get(id string) (Session, error) {
+	dbSession, err := s.q.GetSessionByID(s.ctx, id)
+	if err != nil {
+		return Session{}, err
+	}
+	return s.fromDBItem(dbSession), nil
+}
+
+func (s *service) Save(session Session) (Session, error) {
+	dbSession, err := s.q.UpdateSession(s.ctx, db.UpdateSessionParams{
+		ID:     session.ID,
+		Title:  session.Title,
+		Tokens: session.Tokens,
+		Cost:   session.Cost,
+	})
+	if err != nil {
+		return Session{}, err
+	}
+	session = s.fromDBItem(dbSession)
+	s.Publish(pubsub.UpdatedEvent, session)
+	return session, nil
+}
+
+func (s *service) List() ([]Session, error) {
+	dbSessions, err := s.q.ListSessions(s.ctx)
+	if err != nil {
+		return nil, err
+	}
+	sessions := make([]Session, len(dbSessions))
+	for i, dbSession := range dbSessions {
+		sessions[i] = s.fromDBItem(dbSession)
+	}
+	return sessions, nil
+}
+
+func (s service) fromDBItem(item db.Session) Session {
+	return Session{
+		ID:           item.ID,
+		Title:        item.Title,
+		MessageCount: item.MessageCount,
+		Tokens:       item.Tokens,
+		Cost:         item.Cost,
+		CreatedAt:    item.CreatedAt,
+		UpdatedAt:    item.UpdatedAt,
+	}
+}
+
+func NewService(ctx context.Context, q db.Querier) Service {
+	broker := pubsub.NewBroker[Session]()
+	return &service{
+		broker,
+		q,
+		ctx,
+	}
+}