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validate.go
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validate.go
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package validator
import (
"errors"
"fmt"
"regexp"
)
var (
ReValidRef = regexp.MustCompile(`^[^\s]+$`)
ReValidBranchID = regexp.MustCompile(`^\w[-\w]*$`)
ReValidRepositoryID = regexp.MustCompile(`^[a-z0-9][a-z0-9-]{2,62}$`)
)
var (
ErrInvalid = errors.New("validation error")
ErrInvalidType = fmt.Errorf("invalid type: %w", ErrInvalid)
ErrRequiredValue = fmt.Errorf("required value: %w", ErrInvalid)
ErrInvalidValue = fmt.Errorf("invalid value: %w", ErrInvalid)
ErrPathRequiredValue = fmt.Errorf("missing path: %w", ErrRequiredValue)
)
type ValidateFunc func(v interface{}) error
type ValidateArg struct {
Name string
Value interface{}
Fn ValidateFunc
}
type Secured interface {
SecureValue() string
}
func Validate(args []ValidateArg) error {
for _, arg := range args {
err := arg.Fn(arg.Value)
if err != nil {
return fmt.Errorf("argument %s: %w", arg.Name, err)
}
}
return nil
}
func MakeValidateOptional(fn ValidateFunc) ValidateFunc {
return func(v interface{}) error {
switch s := v.(type) {
case string:
if len(s) == 0 {
return nil
}
case Secured:
if len(s.SecureValue()) == 0 {
return nil
}
case fmt.Stringer:
if len(s.String()) == 0 {
return nil
}
case nil:
return nil
}
return fn(v)
}
}
func ValidateRequiredString(v interface{}) error {
s, ok := v.(string)
if !ok {
panic(ErrInvalidType)
}
if len(s) == 0 {
return ErrRequiredValue
}
return nil
}
func ValidateNonNegativeInt(v interface{}) error {
i, ok := v.(int)
if !ok {
panic(ErrInvalidType)
}
if i < 0 {
return ErrInvalidValue
}
return nil
}