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# Errs | ||
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Да, потому что заебало, что в каждом проекте своя ошибка! |
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package errs | ||
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import ( | ||
"errors" | ||
"fmt" | ||
"strings" | ||
) | ||
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// ArithmeticError // любая ошибка связанная с арифметикой | ||
// AssertionError // ошибка приведения типов | ||
// IndexError // индекс в слайсе не неайден | ||
// KeyError // ключ в мапе не найден | ||
// NameError | ||
// TypeError // когда в интерфейсе передан неправильный тип | ||
// InvalidTypeError | ||
// EnumError | ||
// NotUniqueError | ||
// TooManyParamsError | ||
// TooFewParamsError | ||
// ForbiddenError | ||
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type NotImplementedError struct { | ||
Name string | ||
} | ||
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func NotImplemented(a ...string) *NotImplementedError { | ||
return &NotImplementedError{strings.Join(a, "; ")} | ||
} | ||
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func (e *NotImplementedError) Error() string { | ||
r := "not implemented" | ||
if e.Name != "" { | ||
r = e.Name + ": " + r | ||
} | ||
return r | ||
} | ||
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// RecursionError | ||
// RuntimeError | ||
// IOError | ||
// EnvironmentError // любая ошибка в конфигурации | ||
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// что-то не существует | ||
type NotFoundError struct { | ||
Type string | ||
Key string | ||
} | ||
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func NotFound(_type, key string) *NotFoundError { | ||
return &NotFoundError{_type, key} | ||
} | ||
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func (err *NotFoundError) Error() string { | ||
spacer := "'" | ||
if err.Type != "" { | ||
spacer = " '" | ||
} | ||
return err.Type + spacer + err.Key + "' not found" | ||
} | ||
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func IsNotFound(err error) bool { | ||
_, ok := err.(*NotFoundError) | ||
return ok | ||
} | ||
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type NotPointerError struct { | ||
VariableName string | ||
} | ||
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func NotPointer(varName string) *NotPointerError { | ||
return &NotPointerError{varName} | ||
} | ||
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func (err *NotPointerError) Error() string { | ||
return err.VariableName + " is not a pointer" | ||
} | ||
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// ошибка доступа. как к файлу, так и к чему либо другому | ||
type PermissionError struct { | ||
Item string | ||
RequiredScope string | ||
} | ||
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func Permission(item string) *PermissionError { | ||
return &PermissionError{Item: item} | ||
} | ||
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func (err *PermissionError) Scope(name string) *PermissionError { | ||
err.RequiredScope = name | ||
return err | ||
} | ||
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func (err *PermissionError) Error() string { | ||
res := err.Item + ": permission denied" | ||
if err.RequiredScope != "" { | ||
res += " (required " + err.RequiredScope + " scope)" | ||
} | ||
return res | ||
} | ||
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func IsPermission(err error) bool { | ||
_, ok := err.(*PermissionError) | ||
return ok | ||
} | ||
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// TimeoutError // таймаут, можно использовать вкупе с context | ||
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// когда много ошибок, о которых надо сообщить | ||
type MultipleErrors struct { | ||
errs []error | ||
} | ||
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func Multiple(es ...error) *MultipleErrors { | ||
return &MultipleErrors{es} | ||
} | ||
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// DEPRECATED: use it only when you changing legacy code only | ||
func MultipleAsString(es ...string) *MultipleErrors { | ||
res := make([]error, len(es)) | ||
for i, err := range es { | ||
res[i] = errors.New(err) | ||
} | ||
return &MultipleErrors{res} | ||
} | ||
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func (err *MultipleErrors) Add(errs ...error) { | ||
if err.errs == nil { | ||
err.errs = make([]error, 0) | ||
} | ||
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for _, e := range errs { | ||
if e == nil { | ||
continue | ||
} | ||
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err.errs = append(err.errs, e) | ||
} | ||
} | ||
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// приводит ошибку к общепризнаному виду | ||
func (err *MultipleErrors) Normalize() error { | ||
switch len(err.errs) { | ||
case 0: | ||
return nil | ||
case 1: | ||
return err.errs[0] | ||
default: | ||
return err | ||
} | ||
} | ||
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func (err *MultipleErrors) Errors() []error { | ||
return err.errs | ||
} | ||
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func (err *MultipleErrors) Error() string { | ||
switch len(err.errs) { | ||
case 0: | ||
return "(0 errors)" | ||
case 1: | ||
return err.errs[0].Error() | ||
case 2: | ||
return err.errs[0].Error() + " (and 1 other error)" | ||
default: | ||
return fmt.Sprintf("%s (and %d other errors)", | ||
err.errs[0].Error(), len(err.errs)-1) | ||
} | ||
} | ||
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func IsMultiple(err error) bool { | ||
_, ok := err.(*MultipleErrors) | ||
return ok | ||
} |