Initial

backend/internal/middleware/middleware.go

@@ -0,0 +1,25 @@
+package middleware
+
+import (
+	"net/http"
+)
+
+type Middleware func(http.Handler) http.Handler
+
+type MiddlewareChain []Middleware
+
+func (c MiddlewareChain) Then(finalHandler http.Handler) http.Handler {
+	for i := len(c) - 1; i >= 0; i-- {
+		finalHandler = c[i](finalHandler)
+	}
+	return finalHandler
+}
+
+func (c MiddlewareChain) ThenFunc(finalHandler http.HandlerFunc) http.Handler {
+	result := http.Handler(finalHandler)
+
+	for i := len(c) - 1; i >= 0; i-- {
+		result = c[i](result)
+	}
+	return result
+}