first commit

Made-with: Cursor

internal/models/errors.go

@@ -0,0 +1,52 @@
+package models
+
+import (
+	"errors"
+	"net/http"
+)
+
+type AppError struct {
+	Status  int    `json:"-"`
+	Code    string `json:"code"`
+	Message string `json:"error"`
+	Details string `json:"details,omitempty"`
+}
+
+func (e *AppError) Error() string {
+	return e.Message
+}
+
+var (
+	ErrAuthRequired    = &AppError{Status: http.StatusUnauthorized, Code: "AUTH_REQUIRED", Message: "Authentication required"}
+	ErrAuthInvalid     = &AppError{Status: http.StatusUnauthorized, Code: "AUTH_INVALID", Message: "Invalid credentials"}
+	ErrForbidden       = &AppError{Status: http.StatusForbidden, Code: "FORBIDDEN", Message: "Permission denied"}
+	ErrNotFound        = &AppError{Status: http.StatusNotFound, Code: "NOT_FOUND", Message: "Resource not found"}
+	ErrValidation      = &AppError{Status: http.StatusBadRequest, Code: "VALIDATION_ERROR", Message: "Validation failed"}
+	ErrConflict        = &AppError{Status: http.StatusConflict, Code: "CONFLICT", Message: "Resource conflict"}
+	ErrRateLimited     = &AppError{Status: http.StatusTooManyRequests, Code: "RATE_LIMITED", Message: "Too many requests"}
+	ErrInternal        = &AppError{Status: http.StatusInternalServerError, Code: "INTERNAL", Message: "Internal server error"}
+)
+
+func NewValidationError(detail string) *AppError {
+	return &AppError{Status: http.StatusBadRequest, Code: "VALIDATION_ERROR", Message: "Validation failed", Details: detail}
+}
+
+func NewConflictError(detail string) *AppError {
+	return &AppError{Status: http.StatusConflict, Code: "CONFLICT", Message: detail}
+}
+
+func NewNotFoundError(detail string) *AppError {
+	return &AppError{Status: http.StatusNotFound, Code: "NOT_FOUND", Message: detail}
+}
+
+func NewForbiddenError(detail string) *AppError {
+	return &AppError{Status: http.StatusForbidden, Code: "FORBIDDEN", Message: detail}
+}
+
+func IsAppError(err error) (*AppError, bool) {
+	var appErr *AppError
+	if errors.As(err, &appErr) {
+		return appErr, true
+	}
+	return nil, false
+}