130 lines
3.0 KiB
TypeScript
130 lines
3.0 KiB
TypeScript
import { NormalizedRates } from 'reducers/swap/types';
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import React, { Component } from 'react';
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import { toFixedIfLarger } from 'utils/formatters';
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import './CurrentRates.scss';
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import { ProviderName } from 'actions/swap';
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import { objectContainsObjectKeys } from 'utils/helpers';
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interface RateInputProps {
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rate: number;
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amount: number | string;
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pair: string;
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origin: string;
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destination: string;
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onChange: any;
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}
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export const RateInput: React.SFC<RateInputProps> = ({
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rate,
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amount,
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pair,
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origin,
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destination,
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onChange
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}) => {
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return amount || amount === 0 || amount === '' ? (
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<div className="SwapRates-panel-rate">
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<input
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className="SwapRates-panel-rate-input"
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onChange={onChange}
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value={amount}
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name={pair}
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/>
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<span className="SwapRates-panel-rate-amount">
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{` ${origin} = ${toFixedIfLarger(+amount * rate, 6)} ${destination}`}
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</span>
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</div>
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) : null;
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};
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interface Props {
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provider: ProviderName;
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rates: NormalizedRates;
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}
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interface State {
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pairs: { [pair: string]: number };
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}
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export default class Rates extends Component<Props, State> {
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public state: State = {
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pairs: {}
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};
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public componentDidMount() {
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this.setState({ pairs: this.getPairs() });
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}
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public componentDidUpdate() {
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const newPairs = this.getPairs();
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// prevents endless loop. if state already contains new pairs, don't set state
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if (!objectContainsObjectKeys(newPairs, this.state.pairs)) {
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const pairs = {
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...this.state.pairs,
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...newPairs
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};
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this.setState({
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pairs
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});
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}
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}
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public getPairs = () => {
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const { rates } = this.props;
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const { allIds } = rates;
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return allIds.reduce<{ [id: string]: 1 }>((acc, cur) => {
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acc[cur] = 1;
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return acc;
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}, {});
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};
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public onChange = (event: any) => {
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const { value } = event.target;
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const { name } = event.target;
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this.setState({
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pairs: {
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...this.state.pairs,
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[name]: value
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}
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});
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};
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public buildRateInputs = () => {
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const { rates } = this.props;
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const { pairs } = this.state;
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const fullData: RateInputProps[] = [];
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rates.allIds.forEach(each => {
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fullData.push({
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rate: rates.byId[each].rate,
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amount: pairs[each],
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pair: each,
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origin: rates.byId[each].options[0],
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destination: rates.byId[each].options[1],
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onChange: this.onChange
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});
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});
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// TODO - don't hardcode only first 4 elements of array.
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// not likely to change until significant UI revamp, so not worth spending time on now
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return (
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<div>
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<div className="SwapRates-panel-side col-sm-6">
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<RateInput {...fullData[0]} />
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<RateInput {...fullData[1]} />
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</div>
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<div className="SwapRates-panel-side col-sm-6">
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<RateInput {...fullData[2]} />
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<RateInput {...fullData[3]} />
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</div>
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</div>
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);
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};
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public render() {
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return this.buildRateInputs();
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}
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}
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