full stack second commit

go_cloud/internal/errors/errors.go

@@ -0,0 +1,73 @@
+package errors
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/go-chi/chi/v5/middleware"
+	"github.com/google/uuid"
+)
+
+// ErrorCode represents standardized error codes
+type ErrorCode string
+
+const (
+	CodeUnauthenticated  ErrorCode = "UNAUTHENTICATED"
+	CodePermissionDenied ErrorCode = "PERMISSION_DENIED"
+	CodeNotFound         ErrorCode = "NOT_FOUND"
+	CodeConflict         ErrorCode = "CONFLICT"
+	CodeInvalidArgument  ErrorCode = "INVALID_ARGUMENT"
+	CodeInternal         ErrorCode = "INTERNAL"
+)
+
+// ErrorResponse represents the JSON error response structure
+type ErrorResponse struct {
+	Code    ErrorCode `json:"code"`
+	Message string    `json:"message"`
+}
+
+// WriteError writes a standardized JSON error response
+func WriteError(w http.ResponseWriter, code ErrorCode, message string, status int) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	json.NewEncoder(w).Encode(ErrorResponse{
+		Code:    code,
+		Message: message,
+	})
+}
+
+// GetRequestID extracts the request ID from the request context
+func GetRequestID(r *http.Request) string {
+	if reqID := middleware.GetReqID(r.Context()); reqID != "" {
+		return reqID
+	}
+	return "unknown"
+}
+
+// GetUserID extracts user ID from context if available
+func GetUserID(r *http.Request) string {
+	if userID := r.Context().Value("user"); userID != nil {
+		if uid, ok := userID.(string); ok {
+			return uid
+		}
+	}
+	return ""
+}
+
+// GetOrgID extracts org ID from context if available
+func GetOrgID(r *http.Request) string {
+	if orgID := r.Context().Value("org"); orgID != nil {
+		if oid, ok := orgID.(uuid.UUID); ok {
+			return oid.String()
+		}
+	}
+	return ""
+}
+
+// LogError logs an error with context
+func LogError(r *http.Request, err error, message string) {
+	fmt.Fprintf(os.Stderr, "[ERROR] req_id=%s user_id=%s org_id=%s %s: %v\n",
+		GetRequestID(r), GetUserID(r), GetOrgID(r), message, err)
+}