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metamask-extension/ui/components/app/currency-input/currency-input.js

174 lines
4.8 KiB
JavaScript

import React, { useContext, useEffect, useState } from 'react';
import PropTypes from 'prop-types';
import { useSelector } from 'react-redux';
import UnitInput from '../../ui/unit-input';
import CurrencyDisplay from '../../ui/currency-display';
import {
getValueFromWeiHex,
getWeiHexFromDecimalValue,
} from '../../../helpers/utils/conversions.util';
import { ETH } from '../../../helpers/constants/common';
import { I18nContext } from '../../../contexts/i18n';
import {
getConversionRate,
getNativeCurrency,
} from '../../../ducks/metamask/metamask';
import { getCurrentCurrency, getShouldShowFiat } from '../../../selectors';
/**
* Component that allows user to enter currency values as a number, and props receive a converted
* hex value in WEI. props.value, used as a default or forced value, should be a hex value, which
* gets converted into a decimal value depending on the currency (ETH or Fiat).
*
* @param options0
* @param options0.hexValue
* @param options0.featureSecondary
* @param options0.onChange
* @param options0.onPreferenceToggle
*/
export default function CurrencyInput({
hexValue,
featureSecondary,
onChange,
onPreferenceToggle,
}) {
const t = useContext(I18nContext);
const preferredCurrency = useSelector(getNativeCurrency);
const secondaryCurrency = useSelector(getCurrentCurrency);
const conversionRate = useSelector(getConversionRate);
const showFiat = useSelector(getShouldShowFiat);
const hideSecondary = !showFiat;
const primarySuffix = preferredCurrency || ETH;
const secondarySuffix = secondaryCurrency.toUpperCase();
const [isSwapped, setSwapped] = useState(false);
const [newHexValue, setNewHexValue] = useState(hexValue);
const [shouldDisplayFiat, setShouldDisplayFiat] = useState(featureSecondary);
const shouldUseFiat = hideSecondary ? false : Boolean(shouldDisplayFiat);
const getDecimalValue = () => {
const decimalValueString = shouldUseFiat
? getValueFromWeiHex({
value: hexValue,
toCurrency: secondaryCurrency,
conversionRate,
numberOfDecimals: 2,
})
: getValueFromWeiHex({
value: hexValue,
toCurrency: ETH,
numberOfDecimals: 8,
});
return Number(decimalValueString) || 0;
};
const initialDecimalValue = hexValue ? getDecimalValue() : 0;
const swap = async () => {
await onPreferenceToggle();
setSwapped(!isSwapped);
setShouldDisplayFiat(!shouldDisplayFiat);
};
const handleChange = (newDecimalValue) => {
const hexValueNew = shouldUseFiat
? getWeiHexFromDecimalValue({
value: newDecimalValue,
fromCurrency: secondaryCurrency,
conversionRate,
invertConversionRate: true,
})
: getWeiHexFromDecimalValue({
value: newDecimalValue,
fromCurrency: ETH,
fromDenomination: ETH,
conversionRate,
});
setNewHexValue(hexValueNew);
onChange(hexValueNew);
setSwapped(!isSwapped);
};
useEffect(() => {
setNewHexValue(hexValue);
}, [hexValue]);
useEffect(() => {
if (featureSecondary) {
handleChange(initialDecimalValue);
}
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [featureSecondary, initialDecimalValue]);
const renderConversionComponent = () => {
let currency, numberOfDecimals;
if (hideSecondary) {
return (
<div className="currency-input__conversion-component">
{t('noConversionRateAvailable')}
</div>
);
}
if (shouldUseFiat) {
// Display ETH
currency = preferredCurrency || ETH;
numberOfDecimals = 8;
} else {
// Display Fiat
currency = secondaryCurrency;
numberOfDecimals = 2;
}
return (
<CurrencyDisplay
className="currency-input__conversion-component"
currency={currency}
value={newHexValue}
numberOfDecimals={numberOfDecimals}
/>
);
};
return (
<UnitInput
{...{
hexValue,
preferredCurrency,
secondaryCurrency,
hideSecondary,
featureSecondary,
conversionRate,
onChange,
onPreferenceToggle,
}}
dataTestId="currency-input"
suffix={shouldUseFiat ? secondarySuffix : primarySuffix}
onChange={handleChange}
value={initialDecimalValue}
actionComponent={
<button
className="currency-input__swap-component"
data-testid="currency-swap"
onClick={swap}
>
<i className="fa fa-retweet fa-lg" />
</button>
}
>
{renderConversionComponent()}
</UnitInput>
);
}
CurrencyInput.propTypes = {
hexValue: PropTypes.string,
featureSecondary: PropTypes.bool,
onChange: PropTypes.func,
onPreferenceToggle: PropTypes.func,
};