From ef3410470ad1deab701d2bd9745ee4371a37904c Mon Sep 17 00:00:00 2001
From: unintendedfraud <briceunintendedfraud@fastmail.com>
Date: Thu, 7 Mar 2024 02:25:55 +0100
Subject: [PATCH] simple server with middlewares

---
 channels/main.go  |  4 ++++
 context/http.go   |  2 ++
 context/main.go   | 38 ++++++++++++++++++++++++++++++++++++++
 context/server.go | 33 +++++++++++++++++++++++++++++++++
 go.mod            |  3 +++
 5 files changed, 80 insertions(+)
 create mode 100644 channels/main.go
 create mode 100644 context/http.go
 create mode 100644 context/main.go
 create mode 100644 context/server.go
 create mode 100644 go.mod

diff --git a/channels/main.go b/channels/main.go
new file mode 100644
index 0000000..da29a2c
--- /dev/null
+++ b/channels/main.go
@@ -0,0 +1,4 @@
+package main
+
+func main() {
+}
diff --git a/context/http.go b/context/http.go
new file mode 100644
index 0000000..c9ecbf5
--- /dev/null
+++ b/context/http.go
@@ -0,0 +1,2 @@
+package main
+
diff --git a/context/main.go b/context/main.go
new file mode 100644
index 0000000..615e675
--- /dev/null
+++ b/context/main.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"net/http"
+)
+
+const PORT = 8080
+
+func main() {
+	server := Server{}
+
+	server.Handle(
+		"/get-random-number",
+		printHello,
+		handleGetRandomNumber,
+	)
+
+	if err := server.Listen(PORT); err != nil {
+		panic(err)
+	}
+	fmt.Println("listening on :", PORT)
+}
+
+func handleGetRandomNumber(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Println("Random number: ", rand.Int())
+	})
+}
+
+func printHello(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Println("hello")
+
+		next.ServeHTTP(w, r)
+	})
+}
diff --git a/context/server.go b/context/server.go
new file mode 100644
index 0000000..a8aa1f0
--- /dev/null
+++ b/context/server.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+type ServerHandler func(http.Handler) http.Handler
+
+type Server struct {
+}
+
+func (s Server) Handle(addr string, handlers ...ServerHandler) {
+	http.Handle(addr, handleMiddlewares(handlers))
+}
+
+func (s Server) Listen(port int) error {
+	if err := http.ListenAndServe(fmt.Sprintf(":%d", port), nil); err != nil {
+		return fmt.Errorf("server broke: %s", err.Error())
+	}
+
+	return nil
+}
+
+func handleMiddlewares(handlers []ServerHandler) http.Handler {
+	var handler http.Handler
+
+	for i := range handlers {
+		handler = handlers[len(handlers)-1-i](handler)
+	}
+
+	return handler
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..8d8a75f
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module goplayground
+
+go 1.22.0