chores: refactor struct and structure project

internal/utilities/response/error_code.go

@@ -14,8 +14,10 @@ func (e ErrorCode) Error() string {
 
 var (
 	// 4xx
-	ErrBadRequest = &ErrorCode{Code: "BAD_REQUEST", Message: "BAD_REQUEST", HttpCode: http.StatusBadRequest}
-	ErrDBRequest  = &ErrorCode{Code: "BAD_DB_REQUEST", Message: "DB_ERROR", HttpCode: http.StatusBadRequest}
+	ErrBadRequest   = &ErrorCode{Code: "BAD_REQUEST", Message: "BAD_REQUEST", HttpCode: http.StatusBadRequest}
+	ErrUnauthorized = &ErrorCode{Code: "UNAUTHORIZED", Message: "UNAUTHORIZED", HttpCode: http.StatusUnauthorized}
+	ErrDBRequest    = &ErrorCode{Code: "BAD_DB_REQUEST", Message: "DB_ERROR", HttpCode: http.StatusBadRequest}
+	ErrExpiryToken  = &ErrorCode{Code: "EXPIRED_TOKEN", Message: "EXPIRED_TOKEN", HttpCode: http.StatusUnauthorized}
 
 	// 5xx
 	ErrMarshal      = &ErrorCode{Code: "FAILED_MARSHAL", Message: "FAILED_MARSHAL_BODY", HttpCode: http.StatusInternalServerError}

internal/utilities/response/response_json_error.go

@@ -0,0 +1,23 @@
+package response
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+)
+
+func RespondJsonErrorWithCode(ctx context.Context, w http.ResponseWriter,
+	err error, code string, statusCode int, message string) {
+	setDefaultHeaders(ctx, w.Header())
+
+	w.WriteHeader(statusCode)
+
+	b, _ := json.Marshal(ErrorResponse{
+		Error: ErrorResponseData{
+			Code:    code,
+			Message: message,
+		},
+	})
+
+	w.Write(b)
+}

internal/utilities/response/response_with_error.go

@@ -0,0 +1,23 @@
+package response
+
+import (
+	"errors"
+	"net/http"
+)
+
+func RespondWithError(w http.ResponseWriter, r *http.Request, err error, msg string) {
+	if err != nil {
+		code := ErrUnauthorized.Code
+		status := http.StatusUnauthorized
+
+		if errors.Is(err, ErrExpiryToken) {
+			code = ErrExpiryToken.Code
+			status = ErrExpiryToken.HttpCode
+		}
+
+		RespondJsonErrorWithCode(r.Context(), w, err, code, status, msg)
+	} else {
+		RespondJsonErrorWithCode(r.Context(), w, nil,
+			ErrUnauthorized.Code, http.StatusUnauthorized, msg)
+	}
+}