forked from ebhomengo/niki
66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
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package validation
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import (
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"fmt"
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"reflect"
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)
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// ErrMultipleOfInvalid is the error that returns when a value is not multiple of a base.
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var ErrMultipleOfInvalid = NewError("validation_multiple_of_invalid", "must be multiple of {{.base}}")
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// MultipleOf returns a validation rule that checks if a value is a multiple of the "base" value.
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// Note that "base" should be of integer type.
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func MultipleOf(base interface{}) MultipleOfRule {
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return MultipleOfRule{
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base: base,
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err: ErrMultipleOfInvalid,
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}
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}
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// MultipleOfRule is a validation rule that checks if a value is a multiple of the "base" value.
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type MultipleOfRule struct {
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base interface{}
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err Error
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}
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// Error sets the error message for the rule.
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func (r MultipleOfRule) Error(message string) MultipleOfRule {
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r.err = r.err.SetMessage(message)
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return r
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}
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// ErrorObject sets the error struct for the rule.
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func (r MultipleOfRule) ErrorObject(err Error) MultipleOfRule {
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r.err = err
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return r
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}
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// Validate checks if the value is a multiple of the "base" value.
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func (r MultipleOfRule) Validate(value interface{}) error {
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rv := reflect.ValueOf(r.base)
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switch rv.Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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v, err := ToInt(value)
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if err != nil {
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return err
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}
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if v%rv.Int() == 0 {
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return nil
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}
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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v, err := ToUint(value)
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if err != nil {
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return err
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}
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if v%rv.Uint() == 0 {
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return nil
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}
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default:
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return fmt.Errorf("type not supported: %v", rv.Type())
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}
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return r.err.SetParams(map[string]interface{}{"base": r.base})
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}
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