[#306] Rename Private service to Control service

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/control/server/server.go

@@ -0,0 +1,75 @@
+package control
+
+import (
+	"crypto/ecdsa"
+
+	"github.com/nspcc-dev/neofs-node/pkg/services/control"
+)
+
+// Server is an entity that serves
+// Control service on storage node.
+type Server struct {
+	*cfg
+}
+
+// HealthChecker is component interface for calculating
+// the current health status of a node.
+type HealthChecker interface {
+	// Must calculate and return current node health status.
+	//
+	// If status can not be calculated for any reason,
+	// control.HealthStatus_STATUS_UNDEFINED should be returned.
+	HealthStatus() control.HealthStatus
+}
+
+// Option of the Server's constructor.
+type Option func(*cfg)
+
+type cfg struct {
+	key *ecdsa.PrivateKey
+
+	allowedKeys [][]byte
+
+	healthChecker HealthChecker
+}
+
+func defaultCfg() *cfg {
+	return &cfg{}
+}
+
+// New creates, initializes and returns new Server instance.
+func New(opts ...Option) *Server {
+	c := defaultCfg()
+
+	for _, opt := range opts {
+		opt(c)
+	}
+
+	return &Server{
+		cfg: c,
+	}
+}
+
+// WithKey returns option to set private key
+// used for signing responses.
+func WithKey(key *ecdsa.PrivateKey) Option {
+	return func(c *cfg) {
+		c.key = key
+	}
+}
+
+// WithAllowedKeys returns option to add list of public
+// keys that have rights to use Control service.
+func WithAllowedKeys(keys [][]byte) Option {
+	return func(c *cfg) {
+		c.allowedKeys = append(c.allowedKeys, keys...)
+	}
+}
+
+// WithHealthChecker returns option to set component
+// to calculate node health status.
+func WithHealthChecker(hc HealthChecker) Option {
+	return func(c *cfg) {
+		c.healthChecker = hc
+	}
+}