Refactor cluster node code

cluster/client/lock.go

@@ -0,0 +1,26 @@
+package client
+
+import (
+	"bytes"
+	"net/http"
+	"net/url"
+
+	"github.com/datarhei/core/v16/encoding/json"
+)
+
+func (c *APIClient) LockCreate(origin string, r LockRequest) error {
+	data, err := json.Marshal(r)
+	if err != nil {
+		return err
+	}
+
+	_, err = c.call(http.MethodPost, "/v1/lock", "application/json", bytes.NewReader(data), origin)
+
+	return err
+}
+
+func (c *APIClient) LockDelete(origin string, name string) error {
+	_, err := c.call(http.MethodDelete, "/v1/lock/"+url.PathEscape(name), "application/json", nil, origin)
+
+	return err
+}