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

* refactor(api): bolt package refactor

* refactor(api): refactor bolt package

api/bolt/stack/stack.go

@@ -0,0 +1,134 @@
+package stack
+
+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 = "stacks"
+)
+
+// 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
+}
+
+// Stack returns a stack object by ID.
+func (service *Service) Stack(ID portainer.StackID) (*portainer.Stack, error) {
+	var stack portainer.Stack
+	identifier := internal.Itob(int(ID))
+
+	err := internal.GetObject(service.db, BucketName, identifier, &stack)
+	if err != nil {
+		return nil, err
+	}
+
+	return &stack, nil
+}
+
+// StackByName returns a stack object by name.
+func (service *Service) StackByName(name string) (*portainer.Stack, error) {
+	var stack *portainer.Stack
+
+	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 t portainer.Stack
+			err := internal.UnmarshalObject(v, &t)
+			if err != nil {
+				return err
+			}
+
+			if t.Name == name {
+				stack = &t
+				break
+			}
+		}
+
+		if stack == nil {
+			return portainer.ErrObjectNotFound
+		}
+
+		return nil
+	})
+
+	return stack, err
+}
+
+// Stacks returns an array containing all the stacks.
+func (service *Service) Stacks() ([]portainer.Stack, error) {
+	var stacks = make([]portainer.Stack, 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 stack portainer.Stack
+			err := internal.UnmarshalObject(v, &stack)
+			if err != nil {
+				return err
+			}
+			stacks = append(stacks, stack)
+		}
+
+		return nil
+	})
+
+	return stacks, err
+}
+
+// GetNextIdentifier returns the next identifier for a stack.
+func (service *Service) GetNextIdentifier() int {
+	return internal.GetNextIdentifier(service.db, BucketName)
+}
+
+// CreateStack creates a new stack.
+func (service *Service) CreateStack(stack *portainer.Stack) error {
+	return service.db.Update(func(tx *bolt.Tx) error {
+		bucket := tx.Bucket([]byte(BucketName))
+
+		// We manually manage sequences for stacks
+		err := bucket.SetSequence(uint64(stack.ID))
+		if err != nil {
+			return err
+		}
+
+		data, err := internal.MarshalObject(stack)
+		if err != nil {
+			return err
+		}
+
+		return bucket.Put(internal.Itob(int(stack.ID)), data)
+	})
+}
+
+// UpdateStack updates a stack.
+func (service *Service) UpdateStack(ID portainer.StackID, stack *portainer.Stack) error {
+	identifier := internal.Itob(int(ID))
+	return internal.UpdateObject(service.db, BucketName, identifier, stack)
+}
+
+// DeleteStack deletes a stack.
+func (service *Service) DeleteStack(ID portainer.StackID) error {
+	identifier := internal.Itob(int(ID))
+	return internal.DeleteObject(service.db, BucketName, identifier)
+}