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float.go
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float.go
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package validator
import (
"errors"
"fmt"
"strconv"
)
type FloatValidators []floatValidator
type floatValidator interface {
Validate(value float64) error
}
type FloatMaxValidator struct {
Max float64
}
func (v FloatMaxValidator) Validate(value float64) error {
if value > v.Max {
return fmt.Errorf("value must not be greater than %v", v.Max)
}
return nil
}
type FloatMinValidator struct {
Min float64
}
func (v FloatMinValidator) Validate(value float64) error {
if value < v.Min {
return fmt.Errorf("value must not be greater than %v", v.Min)
}
return nil
}
func ValidateMapFloat(name string, value map[string]any, rules FloatValidators) (float64, error) {
rawValue, ok := value[name]
if !ok {
return -1, fmt.Errorf("missing key \"%v\"", name)
}
return ValidateFloat(rawValue, rules)
}
func ValidateFloat(value any, rules FloatValidators) (float64, error) {
intValue, intOk := value.(int)
floatValue, floatOk := value.(float64)
if !intOk && !floatOk {
return -1, errors.New("value is not a number")
}
if intOk {
floatValue = float64(intValue)
}
for _, rule := range rules {
if err := rule.Validate(floatValue); err != nil {
return -1, err
}
}
return floatValue, nil
}
func CoerceAndValidateMapFloat(
name string,
value map[string]any,
rules FloatValidators,
) (float64, error) {
rawValue, ok := value[name]
if !ok {
return -1, fmt.Errorf("missing key \"%v\"", name)
}
return CoerceAndValidateFloat(rawValue, rules)
}
func CoerceAndValidateFloat(value any, rules FloatValidators) (float64, error) {
stringValue, stringOk := value.(string)
if stringOk {
floatValue, err := strconv.ParseFloat(stringValue, 64)
if err == nil {
return ValidateFloat(floatValue, rules)
}
}
return ValidateFloat(value, rules)
}