move hop out of chain

hop/hop.go

@@ -0,0 +1,41 @@
+package hop
+
+import (
+	"context"
+
+	"github.com/go-gost/core/chain"
+)
+
+type SelectOptions struct {
+	Addr     string
+	Host     string
+	Protocol string
+}
+
+type SelectOption func(*SelectOptions)
+
+func AddrSelectOption(addr string) SelectOption {
+	return func(o *SelectOptions) {
+		o.Addr = addr
+	}
+}
+
+func HostSelectOption(host string) SelectOption {
+	return func(o *SelectOptions) {
+		o.Host = host
+	}
+}
+
+func ProtocolSelectOption(protocol string) SelectOption {
+	return func(o *SelectOptions) {
+		o.Protocol = protocol
+	}
+}
+
+type Hop interface {
+	Select(ctx context.Context, opts ...SelectOption) *chain.Node
+}
+
+type NodeList interface {
+	Nodes() []*chain.Node
+}