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numberAssertion.go
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/
numberAssertion.go
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package arg
import (
"fmt"
"strconv"
"github.com/Bofry/arg/internal"
)
var (
_NumberAssertion = NumberAssertion("")
_ NumberValidator = _NumberAssertion.IsNumber
_ NumberValidator = _NumberAssertion.NonNegativeNumber
_ NumberValidator = _NumberAssertion.NonZero
_ NumberValidator = _NumberAssertion.NonNanNorInf
)
type NumberAssertion string
func (NumberAssertion) Assert(v Number, name string, validators ...NumberValidator) error {
for _, validate := range validators {
if err := validate(v, name); err != nil {
return err
}
}
return nil
}
func (NumberAssertion) Assertor(v Number, name string) *NumberAssertor {
return &NumberAssertor{v, name}
}
func (NumberAssertion) IsNumber(v Number, name string) error {
var err error
_, err = v.Float64()
if err == nil {
return nil
}
_, err = v.Int64()
if err == nil {
return nil
}
if err != nil {
return &InvalidArgumentError{
Name: name,
Reason: fmt.Sprintf(internal.ERR_INVALID_NUMBER, v.String()),
Err: err,
}
}
return nil
}
func (NumberAssertion) NonNegativeNumber(v Number, name string) error {
validate := _NumberAssertion.warpFloatValidator(
Floats.NonNegativeNumber, true,
)
return validate(v, name)
}
func (NumberAssertion) NonZero(v Number, name string) error {
validate := _NumberAssertion.warpFloatValidator(
Floats.NonZero, true,
)
return validate(v, name)
}
func (NumberAssertion) NonNanNorInf(v Number, name string) error {
validate := _NumberAssertion.warpFloatValidator(
Floats.NonNanNorInf, true,
)
return validate(v, name)
}
func (NumberAssertion) Must(fn NumberPredicate) NumberValidator {
return func(v Number, name string) error {
if !fn(v) {
return &InvalidArgumentError{
Name: name,
Reason: fmt.Sprintf(internal.ERR_INVALID_NUMBER, v.String()),
}
}
return nil
}
}
func (NumberAssertion) MustInt(fn IntPredicate) NumberValidator {
return _NumberAssertion.warpIntValidator(
Ints.Must(fn), false,
)
}
func (NumberAssertion) MustFloat(fn FloatPredicate) NumberValidator {
return _NumberAssertion.warpFloatValidator(
Floats.Must(fn), false,
)
}
func (NumberAssertion) NotIn(values ...int64) NumberValidator {
return func(v Number, name string) error {
validate := _NumberAssertion.warpIntValidator(
Ints.NotIn(values...), false,
)
err := validate(v, name)
if err != nil {
var _err error = err
for _err != nil {
if knownErr, ok := _err.(*InvalidArgumentError); ok {
if knownErr.Err != nil {
_err = knownErr.Err
} else {
break
}
} else {
switch _err.(type) {
case *strconv.NumError:
if _, _err := v.Float64(); _err == nil {
return nil
}
}
break
}
}
}
return err
}
}
func (NumberAssertion) Less(comparand float64) NumberValidator {
return _NumberAssertion.warpFloatValidator(
Floats.Less(comparand), true,
)
}
func (NumberAssertion) LessOrEqual(comparand float64) NumberValidator {
return _NumberAssertion.warpFloatValidator(
Floats.LessOrEqual(comparand), true,
)
}
func (NumberAssertion) Greater(comparand float64) NumberValidator {
return _NumberAssertion.warpFloatValidator(
Floats.Greater(comparand), true,
)
}
func (NumberAssertion) GreaterOrEqual(comparand float64) NumberValidator {
return _NumberAssertion.warpFloatValidator(
Floats.GreaterOrEqual(comparand), true,
)
}
// BetweenRange checks if given number is between the specified minimum and maximum values (both inclusive).
func (NumberAssertion) BetweenRange(min, max float64) NumberValidator {
return _NumberAssertion.warpFloatValidator(
Floats.BetweenRange(min, max), true,
)
}
func (NumberAssertion) warpFloatValidator(validator FloatValidator, throwUnderlyingError bool) NumberValidator {
return func(v Number, name string) error {
err := validator.AssertNumber(v, name)
if err != nil {
if throwUnderlyingError {
return err
}
if _err, ok := err.(*InvalidArgumentError); ok {
_err.Reason = fmt.Sprintf(internal.ERR_INVALID_NUMBER, v.String())
return _err
}
return &InvalidArgumentError{
Name: name,
Reason: fmt.Sprintf(internal.ERR_INVALID_NUMBER, v.String()),
Err: err,
}
}
return nil
}
}
func (NumberAssertion) warpIntValidator(validator IntValidator, throwUnderlyingError bool) NumberValidator {
return func(v Number, name string) error {
err := validator.AssertNumber(v, name)
if err != nil {
if throwUnderlyingError {
return err
}
if _err, ok := err.(*InvalidArgumentError); ok {
_err.Reason = fmt.Sprintf(internal.ERR_INVALID_NUMBER, v.String())
return _err
}
return &InvalidArgumentError{
Name: name,
Reason: fmt.Sprintf(internal.ERR_INVALID_NUMBER, v.String()),
Err: err,
}
}
return nil
}
}