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package huh
import (
"fmt"
"unicode/utf8"
)
// ValidateNotEmpty checks if the input is not empty.
func ValidateNotEmpty() func(s string) error {
return func(s string) error {
if err := ValidateMinLength(1)(s); err != nil {
return fmt.Errorf("input cannot be empty")
}
return nil
}
}
// ValidateMinLength checks if the length of the input is at least min.
func ValidateMinLength(min int) func(s string) error {
return func(s string) error {
if utf8.RuneCountInString(s) < min {
return fmt.Errorf("input must be at least %d characters long", min)
}
return nil
}
}
// ValidateMaxLength checks if the length of the input is at most max.
func ValidateMaxLength(max int) func(s string) error {
return func(s string) error {
if utf8.RuneCountInString(s) > max {
return fmt.Errorf("input must be at most %d characters long", max)
}
return nil
}
}
// ValidateLength checks if the length of the input is within the specified range.
func ValidateLength(min, max int) func(s string) error {
return func(s string) error {
if err := ValidateMinLength(min)(s); err != nil {
return err
}
return ValidateMaxLength(max)(s)
}
}
// ValidateOneOf checks if a string is one of the specified options.
func ValidateOneOf(options ...string) func(string) error {
validOptions := make(map[string]struct{})
for _, option := range options {
validOptions[option] = struct{}{}
}
return func(value string) error {
if _, ok := validOptions[value]; !ok {
return fmt.Errorf("invalid option: %s", value)
}
return nil
}
}
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