refactor(api): restructure bolt package (#1981)

* refactor(api): bolt package refactor

* refactor(api): refactor bolt package

api/bolt/registry/registry.go

@@ -0,0 +1,95 @@
+package registry
+
+import (
+	"github.com/portainer/portainer"
+	"github.com/portainer/portainer/bolt/internal"
+
+	"github.com/boltdb/bolt"
+)
+
+const (
+	// BucketName represents the name of the bucket where this service stores data.
+	BucketName = "registries"
+)
+
+// Service represents a service for managing endpoint data.
+type Service struct {
+	db *bolt.DB
+}
+
+// NewService creates a new instance of a service.
+func NewService(db *bolt.DB) (*Service, error) {
+	err := internal.CreateBucket(db, BucketName)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Service{
+		db: db,
+	}, nil
+}
+
+// Registry returns an registry by ID.
+func (service *Service) Registry(ID portainer.RegistryID) (*portainer.Registry, error) {
+	var registry portainer.Registry
+	identifier := internal.Itob(int(ID))
+
+	err := internal.GetObject(service.db, BucketName, identifier, &registry)
+	if err != nil {
+		return nil, err
+	}
+
+	return &registry, nil
+}
+
+// Registries returns an array containing all the registries.
+func (service *Service) Registries() ([]portainer.Registry, error) {
+	var registries = make([]portainer.Registry, 0)
+
+	err := service.db.View(func(tx *bolt.Tx) error {
+		bucket := tx.Bucket([]byte(BucketName))
+
+		cursor := bucket.Cursor()
+		for k, v := cursor.First(); k != nil; k, v = cursor.Next() {
+			var registry portainer.Registry
+			err := internal.UnmarshalObject(v, &registry)
+			if err != nil {
+				return err
+			}
+			registries = append(registries, registry)
+		}
+
+		return nil
+	})
+
+	return registries, err
+}
+
+// CreateRegistry creates a new registry.
+func (service *Service) CreateRegistry(registry *portainer.Registry) error {
+	return service.db.Update(func(tx *bolt.Tx) error {
+		bucket := tx.Bucket([]byte(BucketName))
+
+		id, _ := bucket.NextSequence()
+		registry.ID = portainer.RegistryID(id)
+
+		data, err := internal.MarshalObject(registry)
+		if err != nil {
+			return err
+		}
+
+		return bucket.Put(internal.Itob(int(registry.ID)), data)
+	})
+}
+
+// UpdateRegistry updates an registry.
+func (service *Service) UpdateRegistry(ID portainer.RegistryID, registry *portainer.Registry) error {
+	identifier := internal.Itob(int(ID))
+	return internal.UpdateObject(service.db, BucketName, identifier, registry)
+}
+
+// DeleteRegistry deletes an registry.
+func (service *Service) DeleteRegistry(ID portainer.RegistryID) error {
+	identifier := internal.Itob(int(ID))
+	return internal.DeleteObject(service.db, BucketName, identifier)
+}