From 28814bb7a35cfa73a52367d23b25598451711095 Mon Sep 17 00:00:00 2001
From: Ismayil_Niftaliyev <ismayilturksoy@gmail.com>
Date: Wed, 17 Jan 2018 16:31:15 +0300
Subject: [PATCH] implemented proxy pattern

---
 structural/proxy/proxy.go | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/structural/proxy/proxy.go b/structural/proxy/proxy.go
index e69de29..6b7eb86 100644
--- a/structural/proxy/proxy.go
+++ b/structural/proxy/proxy.go
@@ -0,0 +1,37 @@
+package proxy
+
+import "errors"
+
+type Human struct {
+	Gender string
+	Age    int
+}
+
+type Bar interface {
+	Welcome(Human) error
+}
+
+type OpenBar struct {
+	Visitors []Human
+}
+
+func (b *OpenBar) Welcome(h Human) error {
+	b.Visitors = append(b.Visitors, h)
+	return nil
+}
+
+type BarProxy struct {
+	bar Bar
+}
+
+func (b *BarProxy) Welcome(h Human) error {
+	if h.Gender == "female" && h.Age < 20 {
+		return errors.New("Females under 20 not allowed.")
+	}
+
+	if h.Gender == "male" && h.Age < 18 {
+		return errors.New("Males under 18 not allowed.")
+	}
+
+	return b.bar.Welcome(h)
+}