3 files changed, 120 insertions, 0 deletions
diff --git a/middleware/session/bbolt.go b/middleware/session/bbolt.go
new file mode 100644
index 0000000..1068ed8
--- /dev/null
+++ b/middleware/session/bbolt.go
@@ -0,0 +1,71 @@
+package session
+
+import (
+	"bytes"
+	"context"
+	"encoding/gob"
+	"log/slog"
+
+	"go.etcd.io/bbolt"
+)
+
+func New(db *bbolt.DB, bucketName []byte) Store {
+	return &BoltStore{
+		db:         db,
+		bucketName: bucketName,
+	}
+}
+
+type BoltStore struct {
+	db         *bbolt.DB
+	bucketName []byte
+}
+
+func (s *BoltStore) Load(ctx context.Context, sessionID string) Value {
+	v := Value{}
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(s.bucketName)
+		if bucket == nil {
+			// no bucket -- normal situation
+			return nil
+		}
+		vb := bucket.Get([]byte(sessionID))
+		if vb == nil {
+			// no session -- no error
+			return nil
+		}
+		rdr := bytes.NewBuffer(vb)
+
+		return gob.NewDecoder(rdr).Decode(&v)
+	})
+	if err != nil {
+		slog.WarnContext(ctx, "failed load session", slog.Any("error", err))
+	}
+	return v
+}
+
+func (s *BoltStore) Save(ctx context.Context, sessionID string, value Value) error {
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		bucket, err := tx.CreateBucketIfNotExists(s.bucketName)
+		if err != nil {
+			return err
+		}
+		wrt := bytes.NewBuffer([]byte{})
+		if err := gob.NewEncoder(wrt).Encode(value); err != nil {
+			return err
+		}
+
+		return bucket.Put([]byte(sessionID), wrt.Bytes())
+	})
+}
+
+func (s *BoltStore) Remove(ctx context.Context, sessionID string) error {
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		bucket, err := tx.CreateBucketIfNotExists(s.bucketName)
+		if err != nil {
+			return err
+		}
+
+		return bucket.Delete([]byte(sessionID))
+	})
+}
diff --git a/middleware/session/memstore.go b/middleware/session/memstore.go
new file mode 100644
index 0000000..2fcef39
--- /dev/null
+++ b/middleware/session/memstore.go
@@ -0,0 +1,31 @@
+package session
+
+import (
+	"context"
+	"sync"
+)
+
+type MemoryStore struct {
+	store sync.Map
+}
+
+func (s *MemoryStore) Load(ctx context.Context, sessionID string) Value {
+	val, ok := s.store.Load(sessionID)
+	if ok {
+		return val.(Value)
+	}
+
+	return Value{}
+}
+
+func (s *MemoryStore) Save(ctx context.Context, sessionID string, value Value) error {
+	s.store.Store(sessionID, value)
+
+	return nil
+}
+
+func (s *MemoryStore) Remove(ctx context.Context, sessionID string) error {
+	s.store.Delete(sessionID)
+
+	return nil
+}
diff --git a/middleware/session/store.go b/middleware/session/store.go
new file mode 100644
index 0000000..b74a8aa
--- /dev/null
+++ b/middleware/session/store.go
@@ -0,0 +1,18 @@
+package session
+
+import (
+	"context"
+	"errors"
+)
+
+var (
+	ErrSessionNotFound = errors.New("session not found")
+)
+
+type Store interface {
+	Load(ctx context.Context, sessionID string) Value
+	Save(ctx context.Context, sessionID string, value Value) error
+	Remove(ctx context.Context, sessionID string) error
+}
+
+type Value map[string]any