initial agent setup

internal/message/message.go

@@ -0,0 +1,122 @@
+package message
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/cloudwego/eino/schema"
+	"github.com/google/uuid"
+	"github.com/kujtimiihoxha/termai/internal/db"
+	"github.com/kujtimiihoxha/termai/internal/pubsub"
+)
+
+type Message struct {
+	ID          string
+	SessionID   string
+	MessageData schema.Message
+
+	CreatedAt int64
+	UpdatedAt int64
+}
+
+type Service interface {
+	pubsub.Suscriber[Message]
+	Create(sessionID string, messageData schema.Message) (Message, error)
+	Get(id string) (Message, error)
+	List(sessionID string) ([]Message, error)
+	Delete(id string) error
+	DeleteSessionMessages(sessionID string) error
+}
+
+type service struct {
+	*pubsub.Broker[Message]
+	q   db.Querier
+	ctx context.Context
+}
+
+func (s *service) Create(sessionID string, messageData schema.Message) (Message, error) {
+	messageDataJSON, err := json.Marshal(messageData)
+	if err != nil {
+		return Message{}, err
+	}
+	dbMessage, err := s.q.CreateMessage(s.ctx, db.CreateMessageParams{
+		ID:          uuid.New().String(),
+		SessionID:   sessionID,
+		MessageData: string(messageDataJSON),
+	})
+	if err != nil {
+		return Message{}, err
+	}
+	message := s.fromDBItem(dbMessage)
+	s.Publish(pubsub.CreatedEvent, message)
+	return message, nil
+}
+
+func (s *service) Delete(id string) error {
+	message, err := s.Get(id)
+	if err != nil {
+		return err
+	}
+	err = s.q.DeleteMessage(s.ctx, message.ID)
+	if err != nil {
+		return err
+	}
+	s.Publish(pubsub.DeletedEvent, message)
+	return nil
+}
+
+func (s *service) DeleteSessionMessages(sessionID string) error {
+	messages, err := s.List(sessionID)
+	if err != nil {
+		return err
+	}
+	for _, message := range messages {
+		if message.SessionID == sessionID {
+			err = s.Delete(message.ID)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (s *service) Get(id string) (Message, error) {
+	dbMessage, err := s.q.GetMessage(s.ctx, id)
+	if err != nil {
+		return Message{}, err
+	}
+	return s.fromDBItem(dbMessage), nil
+}
+
+func (s *service) List(sessionID string) ([]Message, error) {
+	dbMessages, err := s.q.ListMessagesBySession(s.ctx, sessionID)
+	if err != nil {
+		return nil, err
+	}
+	messages := make([]Message, len(dbMessages))
+	for i, dbMessage := range dbMessages {
+		messages[i] = s.fromDBItem(dbMessage)
+	}
+	return messages, nil
+}
+
+func (s *service) fromDBItem(item db.Message) Message {
+	var messageData schema.Message
+	json.Unmarshal([]byte(item.MessageData), &messageData)
+	return Message{
+		ID:          item.ID,
+		SessionID:   item.SessionID,
+		MessageData: messageData,
+		CreatedAt:   item.CreatedAt,
+		UpdatedAt:   item.UpdatedAt,
+	}
+}
+
+func NewService(ctx context.Context, q db.Querier) Service {
+	return &service{
+		Broker: pubsub.NewBroker[Message](),
+		q:      q,
+		ctx:    ctx,
+	}
+}