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validator__string.go
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/
validator__string.go
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package validator
import (
"context"
"fmt"
"reflect"
"regexp"
"github.com/machinefi/w3bstream/pkg/depends/kit/validator/errors"
"github.com/machinefi/w3bstream/pkg/depends/kit/validator/rules"
)
var (
TargetStringLength = "string length"
TargetStringValue = "string value"
)
type String struct {
Enums map[string]string
Pattern *regexp.Regexp
LenMode StrLenMode
MinLength uint64
MaxLength *uint64
}
func init() { DefaultFactory.Register(&String{}) }
func (String) Names() []string { return []string{"string", "char"} }
func (vs *String) Validate(v interface{}) error {
rv, ok := v.(reflect.Value)
if !ok {
rv = reflect.ValueOf(v)
}
_t := reflect.TypeOf("")
if !rv.Type().ConvertibleTo(_t) {
return errors.NewUnsupportedTypeError(rv.Type().String(), vs.String())
}
s := rv.Convert(_t).String()
if vs.Enums != nil {
if _, ok := vs.Enums[s]; !ok {
values := make([]interface{}, 0)
for _, v := range vs.Enums {
values = append(values, v)
}
return &errors.NotInEnumError{
Target: TargetStringValue,
Current: v,
Enums: values,
}
}
return nil
}
if vs.Pattern != nil {
if !vs.Pattern.MatchString(s) {
return &errors.NotMatchError{
Target: TargetStringLength,
Pattern: vs.Pattern,
Current: v,
}
}
return nil
}
length := StrLenModes[vs.LenMode](s)
if length < vs.MinLength {
return &errors.OutOfRangeError{
Target: TargetStringLength,
Current: length,
Minimum: vs.MinLength,
}
}
if vs.MaxLength != nil && length > *vs.MaxLength {
return &errors.OutOfRangeError{
Target: TargetStringLength,
Current: length,
Maximum: vs.MaxLength,
}
}
return nil
}
func (String) New(ctx context.Context, r *Rule) (Validator, error) {
vs := &String{}
if r.ExclusiveMin || r.ExclusiveMax {
return nil, errors.NewSyntaxError(
"range mark of %s should not be `(` or `)`", vs.Names()[0],
)
}
mode, err := StringRuleParam(r)
if err != nil {
return nil, err
}
vs.LenMode = mode
if r.Pattern != nil {
vs.Pattern = r.Pattern
return vs, vs.TypeCheck(r)
}
min, max, err := UintRuleRange(r, fmt.Sprintf("%s of string", vs.LenMode), 64)
if err != nil {
return nil, err
}
vs.MinLength = min
vs.MaxLength = max
vs.Enums = StringRuleValues(r)
return vs, vs.TypeCheck(r)
}
func (vs *String) TypeCheck(r *Rule) error {
if r.Type.Kind() == reflect.String {
return nil
}
return errors.NewUnsupportedTypeError(r.String(), vs.String())
}
func (vs *String) String() string {
r := rules.NewRule(vs.Names()[0])
if vs.Enums != nil {
ruleValues := make([]*rules.Lit, 0)
for _, e := range vs.Enums {
ruleValues = append(ruleValues, rules.NewLiteral([]byte(e)))
}
r.ValueMatrix = [][]*rules.Lit{ruleValues}
}
r.Params = []rules.Node{
rules.NewLiteral([]byte(vs.LenMode.String())),
}
if vs.Pattern != nil {
r.Pattern = vs.Pattern
}
r.Range = RangeFromUint(vs.MinLength, vs.MaxLength)
return string(r.Bytes())
}