From 0b4cc932b6fa89b2c3f962d1099407061cf5a48c Mon Sep 17 00:00:00 2001
From: Christian Galo <cgalo@pm.me>
Date: Fri, 21 Feb 2025 11:22:45 -0600
Subject: [PATCH] Start implementing middleware for logging and authentication
 in member-console application

---
 cmd/start.go                      | 62 +++++++++++++++++++++++++------
 internal/middleware/middleware.go | 17 +++++++++
 2 files changed, 67 insertions(+), 12 deletions(-)
 create mode 100644 internal/middleware/middleware.go

diff --git a/cmd/start.go b/cmd/start.go
index 865bf48..e06f651 100644
--- a/cmd/start.go
+++ b/cmd/start.go
@@ -3,7 +3,9 @@ package cmd
 import (
 	"log"
 	"net/http"
+	"time"
 
+	"git.coopcloud.tech/wiki-cafe/member-console/internal/middleware"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -12,7 +14,7 @@ var startCmd = &cobra.Command{
 	Use:   "start",
 	Short: "Start serving the member-console web application",
 	Long: `The start command starts an HTTP server that serves the member-console web
-	application.
+	application from the components directory in the current directory.
 	
 	The server listens on port 8080 by default, unless a different port is specified using the --port flag.`,
 	Args: cobra.NoArgs,
@@ -20,20 +22,27 @@ var startCmd = &cobra.Command{
 		// Retrieve the port value from Viper
 		port := viper.GetString("port")
 
-		// Define the directory containing the static HTML files
-		dir := http.Dir("./components")
-		fileServer := http.FileServer(dir)
-
-		// Use a ServeMux to handle requests
+		// Create a new HTTP request router
 		httpRequestRouter := http.NewServeMux()
-		httpRequestRouter.Handle("/", fileServer)
 
-		// Start the HTTP server
-		log.Printf("Starting server on :%s...\n", port)
-		err := http.ListenAndServe(":"+port, httpRequestRouter)
-		if err != nil {
-			log.Fatal(err)
+		// Create a middleware stack
+		stack := middleware.CreateStack(
+			loggingMiddleware,
+			authMiddleware,
+		)
+
+		server := http.Server{
+			Addr:    ":" + port,
+			Handler: stack(httpRequestRouter),
 		}
+
+		// Register the login page handler
+		httpRequestRouter.HandleFunc("/login", serveLoginPage)
+
+		// Serve the components directory
+		httpRequestRouter.Handle("/", http.FileServer(http.Dir("./components")))
+		log.Println("Starting server on port", port)
+		log.Fatal(server.ListenAndServe())
 	},
 }
 
@@ -50,3 +59,32 @@ func init() {
 	// Add the command to the root command
 	rootCmd.AddCommand(startCmd)
 }
+
+// authMiddleware is a simple middleware function that checks for a valid session cookie
+func authMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Check for the session cookie
+		cookie, err := r.Cookie("session")
+		if err != nil || cookie.Value != "authenticated" {
+			http.Redirect(w, r, "/login", http.StatusSeeOther)
+			return
+		}
+
+		// Call the next handler
+		next.ServeHTTP(w, r)
+	})
+}
+
+// loggerMiddleware is a simple middleware function that logs the request method and URL
+func loggingMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		next.ServeHTTP(w, r)
+		log.Println(r.Method, r.URL.Path, time.Since(start))
+	})
+}
+
+// serveLoginPage is a simple handler function that serves the login page
+func serveLoginPage(w http.ResponseWriter, r *http.Request) {
+	http.ServeFile(w, r, "./components/login.html")
+}
diff --git a/internal/middleware/middleware.go b/internal/middleware/middleware.go
new file mode 100644
index 0000000..2dc4a37
--- /dev/null
+++ b/internal/middleware/middleware.go
@@ -0,0 +1,17 @@
+package middleware
+
+import "net/http"
+
+type Middleware func(http.Handler) http.Handler
+
+// CreateStack creates a stack of middleware handlers
+func CreateStack(middlewares ...Middleware) Middleware {
+	return func(nextMiddleware http.Handler) http.Handler {
+		for i := len(middlewares) - 1; i >= 0; i-- {
+			currentMiddleware := middlewares[i]
+			nextMiddleware = currentMiddleware(nextMiddleware)
+		}
+
+		return nextMiddleware
+	}
+}