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import { BigNumber } from '@0x/utils';
import * as _ from 'lodash';
import * as React from 'react';
import { Maybe } from '../types';
import { MAGIC_TRIGGER_ERROR_INPUT } from '../constants';
import { ColorOption } from '../style/theme';
import { maybeBigNumberUtil } from '../util/maybe_big_number';
import { util } from '../util/util';
import { ScalingInput } from './scaling_input';
export interface ScalingAmountInputProps {
isDisabled: boolean;
maxFontSizePx: number;
textLengthThreshold: number;
fontColor?: ColorOption;
value?: BigNumber;
onAmountChange: (value?: BigNumber) => void;
onFontSizeChange: (fontSizePx: number) => void;
hasAutofocus: boolean;
}
interface ScalingAmountInputState {
stringValue: string;
}
const { stringToMaybeBigNumber, areMaybeBigNumbersEqual } = maybeBigNumberUtil;
export class ScalingAmountInput extends React.Component<ScalingAmountInputProps, ScalingAmountInputState> {
public static defaultProps = {
onAmountChange: util.boundNoop,
onFontSizeChange: util.boundNoop,
isDisabled: false,
hasAutofocus: false,
};
public constructor(props: ScalingAmountInputProps) {
super(props);
this.state = {
stringValue: _.isUndefined(props.value) ? '' : props.value.toString(),
};
}
public componentDidUpdate(): void {
const parsedStateValue = stringToMaybeBigNumber(this.state.stringValue);
const currentValue = this.props.value;
if (!areMaybeBigNumbersEqual(parsedStateValue, currentValue)) {
// we somehow got into the state in which the value passed in and the string value
// in state have differed, reset state
// we dont expect to ever get into this state, but let's make sure
// we reset if we do since we're dealing with important numbers
this.setState({
stringValue: _.isUndefined(currentValue) ? '' : currentValue.toString(),
});
}
}
public render(): React.ReactNode {
const { textLengthThreshold, fontColor, maxFontSizePx, onFontSizeChange } = this.props;
return (
<ScalingInput
maxFontSizePx={maxFontSizePx}
textLengthThreshold={textLengthThreshold}
onFontSizeChange={onFontSizeChange}
fontColor={fontColor}
onChange={this._handleChange}
value={this.state.stringValue}
placeholder="0.00"
emptyInputWidthCh={3.5}
isDisabled={this.props.isDisabled}
hasAutofocus={this.props.hasAutofocus}
/>
);
}
private readonly _handleChange = (event: React.ChangeEvent<HTMLInputElement>): void => {
if (event.target.value === MAGIC_TRIGGER_ERROR_INPUT) {
throw new Error('Triggered error');
}
const sanitizedValue = event.target.value.replace(/[^0-9.]/g, ''); // only allow numbers and "."
this.setState({
stringValue: sanitizedValue,
});
// Trigger onAmountChange with a valid BigNumber, or undefined if the sanitizedValue is invalid or empty
const bigNumberValue: Maybe<BigNumber> = _.isEmpty(sanitizedValue)
? undefined
: stringToMaybeBigNumber(sanitizedValue);
this.props.onAmountChange(bigNumberValue);
};
}
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