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

* refactor(api): bolt package refactor

* refactor(api): refactor bolt package

api/bolt/endpointgroup/endpointgroup.go

@@ -0,0 +1,95 @@
+package endpointgroup
+
+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 = "endpoint_groups"
+)
+
+// 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
+}
+
+// EndpointGroup returns an endpoint group by ID.
+func (service *Service) EndpointGroup(ID portainer.EndpointGroupID) (*portainer.EndpointGroup, error) {
+	var endpointGroup portainer.EndpointGroup
+	identifier := internal.Itob(int(ID))
+
+	err := internal.GetObject(service.db, BucketName, identifier, &endpointGroup)
+	if err != nil {
+		return nil, err
+	}
+
+	return &endpointGroup, nil
+}
+
+// UpdateEndpointGroup updates an endpoint group.
+func (service *Service) UpdateEndpointGroup(ID portainer.EndpointGroupID, endpointGroup *portainer.EndpointGroup) error {
+	identifier := internal.Itob(int(ID))
+	return internal.UpdateObject(service.db, BucketName, identifier, endpointGroup)
+}
+
+// DeleteEndpointGroup deletes an endpoint group.
+func (service *Service) DeleteEndpointGroup(ID portainer.EndpointGroupID) error {
+	identifier := internal.Itob(int(ID))
+	return internal.DeleteObject(service.db, BucketName, identifier)
+}
+
+// EndpointGroups return an array containing all the endpoint groups.
+func (service *Service) EndpointGroups() ([]portainer.EndpointGroup, error) {
+	var endpointGroups = make([]portainer.EndpointGroup, 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 endpointGroup portainer.EndpointGroup
+			err := internal.UnmarshalObject(v, &endpointGroup)
+			if err != nil {
+				return err
+			}
+			endpointGroups = append(endpointGroups, endpointGroup)
+		}
+
+		return nil
+	})
+
+	return endpointGroups, err
+}
+
+// CreateEndpointGroup assign an ID to a new endpoint group and saves it.
+func (service *Service) CreateEndpointGroup(endpointGroup *portainer.EndpointGroup) error {
+	return service.db.Update(func(tx *bolt.Tx) error {
+		bucket := tx.Bucket([]byte(BucketName))
+
+		id, _ := bucket.NextSequence()
+		endpointGroup.ID = portainer.EndpointGroupID(id)
+
+		data, err := internal.MarshalObject(endpointGroup)
+		if err != nil {
+			return err
+		}
+
+		return bucket.Put(internal.Itob(int(endpointGroup.ID)), data)
+	})
+}