From 6f5bb85330acd4227d4c233e283f384e6ff834c8 Mon Sep 17 00:00:00 2001
From: Alexander Kiryukhin <a.kiryukhin@mail.ru>
Date: Sun, 19 Dec 2021 20:08:05 +0300
Subject: Initial

---
 handler.go | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 handler.go

(limited to 'handler.go')

diff --git a/handler.go b/handler.go
new file mode 100644
index 0000000..d497b24
--- /dev/null
+++ b/handler.go
@@ -0,0 +1,31 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+//Wrap API handler and returns standard http handler function
+func Wrap[RQ any, RS any](handler func(ctx context.Context, request *RQ) (RS, error)) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		req := new(RQ)
+		if err := json.NewDecoder(r.Body).Decode(req); err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			_, _ = w.Write([]byte(fmt.Sprintf("Fail to parse request body: %s", err.Error())))
+			return
+		}
+		resp, err := handler(r.Context(), req)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+		if err := json.NewEncoder(w).Encode(resp); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+	}
+}
-- 
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