88 lines
2.1 KiB
TypeScript
88 lines
2.1 KiB
TypeScript
// Copyright 2017-2019 @polkadot/ui-app authors & contributors
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// This software may be modified and distributed under the terms
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// of the Apache-2.0 license. See the LICENSE file for details.
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import { Props as BaseProps, Size } from '../types';
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import React from 'react';
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import { Compact } from '@polkadot/types';
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import { Input } from '@polkadot/ui-app/index';
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import { hexToU8a, isHex, u8aToHex } from '@polkadot/util';
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import Bare from './Bare';
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type Props = BaseProps & {
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children?: React.ReactNode,
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length?: number,
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size?: Size,
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validate?: (u8a: Uint8Array) => boolean,
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withLength?: boolean
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};
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const defaultValidate = (u8a: Uint8Array): boolean =>
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true;
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export default class BaseBytes extends React.PureComponent<Props> {
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render () {
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const { children, className, defaultValue: { value }, isDisabled, isError, label, size = 'full', style, withLabel } = this.props;
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const defaultValue = value
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? (
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isHex(value)
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? value
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: u8aToHex(value as Uint8Array, isDisabled ? 256 : -1)
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)
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: undefined;
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return (
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<Bare
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className={className}
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style={style}
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>
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<Input
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className={size}
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defaultValue={defaultValue}
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isAction={!!children}
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isDisabled={isDisabled}
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isError={isError}
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label={label}
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onChange={this.onChange}
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placeholder='0x...'
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type='text'
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withLabel={withLabel}
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>
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{children}
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</Input>
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</Bare>
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);
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}
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private onChange = (hex: string): void => {
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const { length = -1, onChange, validate = defaultValidate, withLength } = this.props;
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let value: Uint8Array;
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let isValid: boolean = true;
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try {
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value = hexToU8a(hex);
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} catch (error) {
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value = new Uint8Array([]);
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isValid = false;
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}
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isValid = isValid && validate(value) && (
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length !== -1
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? value.length === length
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: value.length !== 0
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);
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if (withLength && isValid) {
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value = Compact.addLengthPrefix(value);
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}
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onChange && onChange({
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isValid,
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value
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});
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}
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}
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