feat(global): multi endpoint management (#407)

api/bolt/internal/internal.go

@@ -3,6 +3,7 @@ package internal
 import (
 	"github.com/portainer/portainer"
 
+	"encoding/binary"
 	"encoding/json"
 )
 
@@ -15,3 +16,22 @@ func MarshalUser(user *portainer.User) ([]byte, error) {
 func UnmarshalUser(data []byte, user *portainer.User) error {
 	return json.Unmarshal(data, user)
 }
+
+// MarshalEndpoint encodes an endpoint to binary format.
+func MarshalEndpoint(endpoint *portainer.Endpoint) ([]byte, error) {
+	return json.Marshal(endpoint)
+}
+
+// UnmarshalEndpoint decodes an endpoint from a binary data.
+func UnmarshalEndpoint(data []byte, endpoint *portainer.Endpoint) error {
+	return json.Unmarshal(data, endpoint)
+}
+
+// Itob returns an 8-byte big endian representation of v.
+// This function is typically used for encoding integer IDs to byte slices
+// so that they can be used as BoltDB keys.
+func Itob(v int) []byte {
+	b := make([]byte, 8)
+	binary.BigEndian.PutUint64(b, uint64(v))
+	return b
+}