Refactor post handling and add command setup for Telegram bot

internal/storage/storage.go

@@ -15,6 +15,7 @@ var (
 	bucketAppConfig  = []byte("AppConfig")
 	bucketCategories = []byte("Categories")
 	bucketEntries    = []byte("Entries")
+	bucketAdmins     = []byte("Admins")
 
 	keyTocMsgID = []byte("toc_msg_id")
 )
@@ -59,7 +60,7 @@ func New(path string) (*Storage, error) {
 
 func (s *Storage) initBuckets() error {
 	return s.db.Update(func(tx *bolt.Tx) error {
-		buckets := [][]byte{bucketAppConfig, bucketCategories, bucketEntries}
+		buckets := [][]byte{bucketAppConfig, bucketCategories, bucketEntries, bucketAdmins}
 		for _, b := range buckets {
 			if _, err := tx.CreateBucketIfNotExists(b); err != nil {
 				return fmt.Errorf("failed to create bucket %s: %w", b, err)
@@ -102,3 +103,50 @@ func encodeJSON(v any) ([]byte, error) {
 func decodeJSON(data []byte, v any) error {
 	return json.Unmarshal(data, v)
 }
+
+// Admin management
+
+func (s *Storage) AddAdmin(userID int64) error {
+	return s.db.Update(func(tx *bolt.Tx) error {
+		b := tx.Bucket(bucketAdmins)
+		key := make([]byte, 8)
+		binary.BigEndian.PutUint64(key, uint64(userID))
+		return b.Put(key, []byte("1"))
+	})
+}
+
+func (s *Storage) RemoveAdmin(userID int64) error {
+	return s.db.Update(func(tx *bolt.Tx) error {
+		b := tx.Bucket(bucketAdmins)
+		key := make([]byte, 8)
+		binary.BigEndian.PutUint64(key, uint64(userID))
+		return b.Delete(key)
+	})
+}
+
+func (s *Storage) IsAdmin(userID int64) bool {
+	var exists bool
+	s.db.View(func(tx *bolt.Tx) error {
+		b := tx.Bucket(bucketAdmins)
+		key := make([]byte, 8)
+		binary.BigEndian.PutUint64(key, uint64(userID))
+		exists = b.Get(key) != nil
+		return nil
+	})
+	return exists
+}
+
+func (s *Storage) ListAdmins() ([]int64, error) {
+	var admins []int64
+	err := s.db.View(func(tx *bolt.Tx) error {
+		b := tx.Bucket(bucketAdmins)
+		return b.ForEach(func(k, v []byte) error {
+			if len(k) == 8 {
+				userID := int64(binary.BigEndian.Uint64(k))
+				admins = append(admins, userID)
+			}
+			return nil
+		})
+	})
+	return admins, err
+}