Aneurin Barker Snook
51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
package validate
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import "fmt"
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// Validation error.
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var (
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Err = Error{}
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)
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// Error represents a validation error.
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type Error struct {
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Message string
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Data []any
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}
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// Error retrieves the message of a validation Error.
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// If it has Data, the message will be formatted.
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func (e Error) Error() string {
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if len(e.Data) > 0 {
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return fmt.Sprintf(e.Message, e.Data...)
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}
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return e.Message
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}
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// Is determines whether the Error is an instance of the target.
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// https://pkg.go.dev/errors#Is
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//
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// If the target is a validation error and specifies a message, this function returns true if the messages match.
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// If the target is an empty validation error, this function always returns true.
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func (e Error) Is(target error) bool {
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if t, ok := target.(Error); ok {
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return t.Message == e.Message || t.Message == ""
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}
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return false
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}
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func (e Error) With(value any) Error {
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if e.Data == nil {
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e.Data = []any{}
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}
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e.Data = append(e.Data, value)
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return e
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}
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// NewError creates a new validation error.
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func NewError(message string) Error {
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return Error{
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Message: message,
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}
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}
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