70 lines
1.9 KiB
Go
70 lines
1.9 KiB
Go
package validate
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import (
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"errors"
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"fmt"
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"strings"
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ut "github.com/go-playground/universal-translator"
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"github.com/go-playground/validator/v10"
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errs "gateway/internal/library/errors"
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"gateway/internal/library/errors/code"
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)
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// ValidationError holds information about a single validation error.
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type ValidationError struct {
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Field string `json:"field"`
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Message string `json:"message"`
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}
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// ValidationErrors is a slice of ValidationError that implements the error interface.
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type ValidationErrors []ValidationError
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func (ve ValidationErrors) Error() string {
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if len(ve) == 0 {
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return ""
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}
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var sb strings.Builder
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sb.WriteString("validation failed:")
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for i, e := range ve {
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fmt.Fprintf(&sb, " field='%s', message='%s'", e.Field, e.Message)
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if i < len(ve)-1 {
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sb.WriteString(";")
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}
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}
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return sb.String()
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}
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// Is supports errors.Is when comparing against ValidationErrors.
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func (ValidationErrors) Is(target error) bool {
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_, ok := target.(ValidationErrors)
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return ok
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}
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// AsErrors unwraps err into ValidationErrors when present.
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func AsErrors(err error) (ValidationErrors, bool) {
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var ve ValidationErrors
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if errors.As(err, &ve) {
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return ve, true
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}
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return nil, false
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}
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// ToBusinessError maps field validation failures to InputInvalidFormat (HTTP 400).
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func (ve ValidationErrors) ToBusinessError(scope code.Scope) *errs.Error {
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return errs.For(scope).InputInvalidFormat(ve.Error())
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}
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// translateValidationErrors converts validator.ValidationErrors to our custom ValidationErrors.
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func translateValidationErrors(valErrs validator.ValidationErrors, trans ut.Translator) ValidationErrors {
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customErrors := make(ValidationErrors, 0, len(valErrs))
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for _, err := range valErrs {
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customErrors = append(customErrors, ValidationError{
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Field: err.Field(), // Already transformed by RegisterTagNameFunc
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Message: err.Translate(trans),
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})
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}
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return customErrors
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}
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