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errors.go
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/
errors.go
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package validator
import (
"bytes"
"errors"
"fmt"
"reflect"
reflectx "github.com/octohelm/x/reflect"
)
type Location string
func NewErrorSet(paths ...interface{}) *ErrorSet {
return &ErrorSet{
paths: paths,
errors: make([]FieldError, 0),
}
}
type ErrorSet struct {
paths []interface{}
errors []FieldError
}
func (es *ErrorSet) AddErr(err error, keyPathNodes ...interface{}) {
if err == nil {
return
}
es.errors = append(es.errors, FieldError{
Path: keyPathNodes,
Error: err,
})
}
func (es *ErrorSet) Each(cb func(fieldErr *FieldError)) {
for i := range es.errors {
cb(&es.errors[i])
}
}
func (es *ErrorSet) Flatten() *ErrorSet {
flattened := NewErrorSet(es.paths...)
var walk func(es *ErrorSet, parents ...interface{})
walk = func(es *ErrorSet, parents ...interface{}) {
es.Each(func(fieldErr *FieldError) {
var subSet *ErrorSet
if errors.As(fieldErr.Error, &subSet) {
walk(subSet, append(parents, fieldErr.Path...)...)
} else {
flattened.AddErr(fieldErr.Error, append(parents, fieldErr.Path...)...)
}
})
}
walk(es)
return flattened
}
func (es *ErrorSet) Len() int {
return len(es.errors)
}
func (es *ErrorSet) Err() error {
if len(es.errors) == 0 {
return nil
}
return es
}
func (es *ErrorSet) Error() string {
set := es.Flatten()
buf := bytes.Buffer{}
set.Each(func(fieldErr *FieldError) {
buf.WriteString(fmt.Sprintf("%s %s", fieldErr.Path, fieldErr.Error))
buf.WriteRune('\n')
})
return buf.String()
}
type FieldError struct {
Path KeyPath
Error error
}
type KeyPath []interface{}
func (keyPath KeyPath) String() string {
buf := &bytes.Buffer{}
for i := 0; i < len(keyPath); i++ {
switch keyOrIndex := keyPath[i].(type) {
case string:
if buf.Len() > 0 {
buf.WriteRune('.')
}
buf.WriteString(keyOrIndex)
case int:
buf.WriteString(fmt.Sprintf("[%d]", keyOrIndex))
}
}
return buf.String()
}
type MissingRequired struct{}
func (MissingRequired) Error() string {
return "missing required field"
}
type NotMatchError struct {
Target string
Current interface{}
Pattern string
}
func (err *NotMatchError) Error() string {
return fmt.Sprintf("%s %s not match %v", err.Target, err.Pattern, err.Current)
}
type MultipleOfError struct {
Target string
Current interface{}
MultipleOf interface{}
}
func (e *MultipleOfError) Error() string {
buf := bytes.NewBuffer(nil)
buf.WriteString(e.Target)
buf.WriteString(fmt.Sprintf(" should be multiple of %v", e.MultipleOf))
buf.WriteString(fmt.Sprintf(", but got invalid value %v", e.Current))
return buf.String()
}
type NotInEnumError struct {
Target string
Current interface{}
Enums []interface{}
}
func (e *NotInEnumError) Error() string {
buf := bytes.NewBuffer(nil)
buf.WriteString(e.Target)
buf.WriteString(" should be one of ")
for i, v := range e.Enums {
if i > 0 {
buf.WriteString(", ")
}
buf.WriteString(fmt.Sprintf("%v", v))
}
buf.WriteString(fmt.Sprintf(", but got invalid value %v", e.Current))
return buf.String()
}
type OutOfRangeError struct {
Target string
Current interface{}
Minimum interface{}
Maximum interface{}
ExclusiveMaximum bool
ExclusiveMinimum bool
}
func (e *OutOfRangeError) Error() string {
buf := bytes.NewBuffer(nil)
buf.WriteString(e.Target)
buf.WriteString(" should be")
if e.Minimum != nil {
buf.WriteString(" larger")
if e.ExclusiveMinimum {
buf.WriteString(" or equal")
}
buf.WriteString(fmt.Sprintf(" than %v", reflectx.Indirect(reflect.ValueOf(e.Minimum)).Interface()))
}
if e.Maximum != nil {
if e.Minimum != nil {
buf.WriteString(" and")
}
buf.WriteString(" less")
if e.ExclusiveMaximum {
buf.WriteString(" or equal")
}
buf.WriteString(fmt.Sprintf(" than %v", reflectx.Indirect(reflect.ValueOf(e.Maximum)).Interface()))
}
buf.WriteString(fmt.Sprintf(", but got invalid value %v", e.Current))
return buf.String()
}
func NewUnsupportedTypeError(typ string, rule string, msgs ...string) *UnsupportedTypeError {
return &UnsupportedTypeError{
rule: rule,
typ: typ,
msgs: msgs,
}
}
type UnsupportedTypeError struct {
msgs []string
rule string
typ string
}
func (e *UnsupportedTypeError) Error() string {
buf := bytes.NewBuffer(nil)
buf.WriteString(e.rule)
buf.WriteString(" could not validate type ")
buf.WriteString(e.typ)
for i, msg := range e.msgs {
if i == 0 {
buf.WriteString(": ")
} else {
buf.WriteString("; ")
}
buf.WriteString(msg)
}
return buf.String()
}