From 092a4b308f5707935e5024d01b122aa95704f011 Mon Sep 17 00:00:00 2001
From: mohammad mahdi rezaei <rezaei_21@yahoo.com>
Date: Mon, 18 Dec 2023 17:38:07 +0330
Subject: [PATCH] feat(pkg): added err message and http message mapper

---
 pkg/errmsg/message.go |  6 ++++++
 pkg/httpmsg/mapper.go | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 pkg/errmsg/message.go
 create mode 100644 pkg/httpmsg/mapper.go

diff --git a/pkg/errmsg/message.go b/pkg/errmsg/message.go
new file mode 100644
index 0000000..2d67a71
--- /dev/null
+++ b/pkg/errmsg/message.go
@@ -0,0 +1,6 @@
+package errmsg
+
+const (
+	ErrorMsgNotFound           = "record not found"
+	ErrorMsgSomethingWentWrong = "something went wrong"
+)
diff --git a/pkg/httpmsg/mapper.go b/pkg/httpmsg/mapper.go
new file mode 100644
index 0000000..114fd3a
--- /dev/null
+++ b/pkg/httpmsg/mapper.go
@@ -0,0 +1,41 @@
+package httpmsg
+
+import (
+	"git.gocasts.ir/ebhomengo/niki/pkg/errmsg"
+	"git.gocasts.ir/ebhomengo/niki/pkg/richerror"
+	"net/http"
+)
+
+func Error(err error) (message string, code int) {
+	switch err.(type) {
+	case richerror.RichError:
+		re := err.(richerror.RichError)
+		msg := re.Message()
+
+		code := mapKindToHTTPStatusCode(re.Kind())
+
+		// we should not expose unexpected error messages
+		if code >= 500 {
+			msg = errmsg.ErrorMsgSomethingWentWrong
+		}
+
+		return msg, code
+	default:
+		return err.Error(), http.StatusBadRequest
+	}
+}
+
+func mapKindToHTTPStatusCode(kind richerror.Kind) int {
+	switch kind {
+	case richerror.KindInvalid:
+		return http.StatusUnprocessableEntity
+	case richerror.KindNotFound:
+		return http.StatusNotFound
+	case richerror.KindForbidden:
+		return http.StatusForbidden
+	case richerror.KindUnexpected:
+		return http.StatusInternalServerError
+	default:
+		return http.StatusBadRequest
+	}
+}