add chain

pkg/chain/chain.go

@@ -0,0 +1,33 @@
+package chain
+
+type Chain struct {
+	groups []*NodeGroup
+}
+
+func (c *Chain) AddNodeGroup(group *NodeGroup) {
+	c.groups = append(c.groups, group)
+}
+
+func (c *Chain) GetRoute() (r *Route) {
+	if c == nil || len(c.groups) == 0 {
+		return
+	}
+
+	r = &Route{}
+	for _, group := range c.groups {
+		node := group.Next()
+		if node == nil {
+			return
+		}
+		// TODO: bypass
+
+		if node.Transport().IsMultiplex() {
+			tr := node.Transport().WithRoute(r)
+			node = node.WithTransport(tr)
+			r = &Route{}
+		}
+
+		r.AddNode(node)
+	}
+	return r
+}