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108 lines
3.6 KiB
Go
108 lines
3.6 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package util
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import (
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"errors"
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"fmt"
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"html/template"
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)
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// Common Errors forming the base of our error system
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//
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// Many Errors returned by Gitea can be tested against these errors using "errors.Is".
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var (
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ErrInvalidArgument = errors.New("invalid argument") // also implies HTTP 400
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ErrPermissionDenied = errors.New("permission denied") // also implies HTTP 403
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ErrNotExist = errors.New("resource does not exist") // also implies HTTP 404
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ErrAlreadyExist = errors.New("resource already exists") // also implies HTTP 409
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ErrContentTooLarge = errors.New("content exceeds limit") // also implies HTTP 413
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// ErrUnprocessableContent implies HTTP 422, the syntax of the request content is correct,
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// but the server is unable to process the contained instructions
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ErrUnprocessableContent = errors.New("unprocessable content")
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)
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// errorWrapper provides a simple wrapper for a wrapped error where the wrapped error message plays no part in the error message
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// Especially useful for "untyped" errors created with "errors.New(…)" that can be classified as 'invalid argument', 'permission denied', 'exists already', or 'does not exist'
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type errorWrapper struct {
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Message string
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Err error
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}
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// Error returns the message
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func (w errorWrapper) Error() string {
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return w.Message
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}
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// Unwrap returns the underlying error
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func (w errorWrapper) Unwrap() error {
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return w.Err
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}
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// ErrorWrap returns an error that formats as the given text but unwraps as the provided error
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func ErrorWrap(unwrap error, message string, args ...any) error {
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if len(args) == 0 {
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return errorWrapper{Message: message, Err: unwrap}
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}
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return errorWrapper{Message: fmt.Sprintf(message, args...), Err: unwrap}
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}
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// NewInvalidArgumentErrorf returns an error that formats as the given text but unwraps as an ErrInvalidArgument
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func NewInvalidArgumentErrorf(message string, args ...any) error {
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return ErrorWrap(ErrInvalidArgument, message, args...)
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}
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// NewPermissionDeniedErrorf returns an error that formats as the given text but unwraps as an ErrPermissionDenied
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func NewPermissionDeniedErrorf(message string, args ...any) error {
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return ErrorWrap(ErrPermissionDenied, message, args...)
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}
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// NewAlreadyExistErrorf returns an error that formats as the given text but unwraps as an ErrAlreadyExist
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func NewAlreadyExistErrorf(message string, args ...any) error {
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return ErrorWrap(ErrAlreadyExist, message, args...)
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}
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// NewNotExistErrorf returns an error that formats as the given text but unwraps as an ErrNotExist
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func NewNotExistErrorf(message string, args ...any) error {
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return ErrorWrap(ErrNotExist, message, args...)
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}
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// ErrorTranslatable wraps an error with translation information
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type ErrorTranslatable interface {
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error
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Unwrap() error
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Translate(ErrorLocaleTranslator) template.HTML
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}
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type errorTranslatableWrapper struct {
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err error
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trKey string
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trArgs []any
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}
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type ErrorLocaleTranslator interface {
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Tr(key string, args ...any) template.HTML
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}
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func (w *errorTranslatableWrapper) Error() string { return w.err.Error() }
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func (w *errorTranslatableWrapper) Unwrap() error { return w.err }
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func (w *errorTranslatableWrapper) Translate(t ErrorLocaleTranslator) template.HTML {
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return t.Tr(w.trKey, w.trArgs...)
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}
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func ErrorWrapTranslatable(err error, trKey string, trArgs ...any) ErrorTranslatable {
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return &errorTranslatableWrapper{err: err, trKey: trKey, trArgs: trArgs}
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}
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func ErrorAsTranslatable(err error) ErrorTranslatable {
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var e *errorTranslatableWrapper
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if errors.As(err, &e) {
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return e
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}
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return nil
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}
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