feat: notification service

notification/internal/adapters/redisstate/acceptance_store.go

@@ -0,0 +1,140 @@
+package redisstate
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"galaxy/notification/internal/api/intentstream"
+	"galaxy/notification/internal/service/acceptintent"
+
+	"github.com/redis/go-redis/v9"
+)
+
+// AcceptanceStore provides the Redis-backed durable storage used by the
+// intent-acceptance use case.
+type AcceptanceStore struct {
+	client *redis.Client
+	writer *AtomicWriter
+	keys   Keyspace
+	cfg    AcceptanceConfig
+}
+
+// NewAcceptanceStore constructs one Redis-backed acceptance store.
+func NewAcceptanceStore(client *redis.Client, cfg AcceptanceConfig) (*AcceptanceStore, error) {
+	if client == nil {
+		return nil, errors.New("new notification acceptance store: nil redis client")
+	}
+
+	writer, err := NewAtomicWriter(client, cfg)
+	if err != nil {
+		return nil, fmt.Errorf("new notification acceptance store: %w", err)
+	}
+
+	return &AcceptanceStore{
+		client: client,
+		writer: writer,
+		keys:   Keyspace{},
+		cfg:    cfg,
+	}, nil
+}
+
+// CreateAcceptance stores one complete accepted notification write set in
+// Redis.
+func (store *AcceptanceStore) CreateAcceptance(ctx context.Context, input acceptintent.CreateAcceptanceInput) error {
+	if store == nil || store.client == nil || store.writer == nil {
+		return errors.New("create notification acceptance: nil store")
+	}
+	if ctx == nil {
+		return errors.New("create notification acceptance: nil context")
+	}
+	if err := input.Validate(); err != nil {
+		return fmt.Errorf("create notification acceptance: %w", err)
+	}
+
+	err := store.writer.CreateAcceptance(ctx, input)
+	if errors.Is(err, ErrConflict) {
+		return fmt.Errorf("create notification acceptance: %w", acceptintent.ErrConflict)
+	}
+	if err != nil {
+		return fmt.Errorf("create notification acceptance: %w", err)
+	}
+
+	return nil
+}
+
+// GetIdempotency loads one accepted idempotency scope from Redis.
+func (store *AcceptanceStore) GetIdempotency(ctx context.Context, producer intentstream.Producer, idempotencyKey string) (acceptintent.IdempotencyRecord, bool, error) {
+	if store == nil || store.client == nil {
+		return acceptintent.IdempotencyRecord{}, false, errors.New("get notification idempotency: nil store")
+	}
+	if ctx == nil {
+		return acceptintent.IdempotencyRecord{}, false, errors.New("get notification idempotency: nil context")
+	}
+
+	payload, err := store.client.Get(ctx, store.keys.Idempotency(producer, idempotencyKey)).Bytes()
+	switch {
+	case errors.Is(err, redis.Nil):
+		return acceptintent.IdempotencyRecord{}, false, nil
+	case err != nil:
+		return acceptintent.IdempotencyRecord{}, false, fmt.Errorf("get notification idempotency: %w", err)
+	}
+
+	record, err := UnmarshalIdempotency(payload)
+	if err != nil {
+		return acceptintent.IdempotencyRecord{}, false, fmt.Errorf("get notification idempotency: %w", err)
+	}
+
+	return record, true, nil
+}
+
+// GetNotification loads one accepted notification record from Redis.
+func (store *AcceptanceStore) GetNotification(ctx context.Context, notificationID string) (acceptintent.NotificationRecord, bool, error) {
+	if store == nil || store.client == nil {
+		return acceptintent.NotificationRecord{}, false, errors.New("get notification record: nil store")
+	}
+	if ctx == nil {
+		return acceptintent.NotificationRecord{}, false, errors.New("get notification record: nil context")
+	}
+
+	payload, err := store.client.Get(ctx, store.keys.Notification(notificationID)).Bytes()
+	switch {
+	case errors.Is(err, redis.Nil):
+		return acceptintent.NotificationRecord{}, false, nil
+	case err != nil:
+		return acceptintent.NotificationRecord{}, false, fmt.Errorf("get notification record: %w", err)
+	}
+
+	record, err := UnmarshalNotification(payload)
+	if err != nil {
+		return acceptintent.NotificationRecord{}, false, fmt.Errorf("get notification record: %w", err)
+	}
+
+	return record, true, nil
+}
+
+// GetRoute loads one accepted notification route by NotificationID and
+// RouteID.
+func (store *AcceptanceStore) GetRoute(ctx context.Context, notificationID string, routeID string) (acceptintent.NotificationRoute, bool, error) {
+	if store == nil || store.client == nil {
+		return acceptintent.NotificationRoute{}, false, errors.New("get notification route: nil store")
+	}
+	if ctx == nil {
+		return acceptintent.NotificationRoute{}, false, errors.New("get notification route: nil context")
+	}
+
+	payload, err := store.client.Get(ctx, store.keys.Route(notificationID, routeID)).Bytes()
+	switch {
+	case errors.Is(err, redis.Nil):
+		return acceptintent.NotificationRoute{}, false, nil
+	case err != nil:
+		return acceptintent.NotificationRoute{}, false, fmt.Errorf("get notification route: %w", err)
+	}
+
+	record, err := UnmarshalRoute(payload)
+	if err != nil {
+		return acceptintent.NotificationRoute{}, false, fmt.Errorf("get notification route: %w", err)
+	}
+
+	return record, true, nil
+}