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import { ZeroEx } from '0x.js';
import { BigNumber } from '@0xproject/utils';
import * as _ from 'lodash';
import * as React from 'react';
import { Link } from 'react-router-dom';
import { Blockchain } from 'ts/blockchain';
import { BalanceBoundedInput } from 'ts/components/inputs/balance_bounded_input';
import { InputErrMsg, Token, ValidatedBigNumberCallback, WebsitePaths } from 'ts/types';
import { colors } from 'ts/utils/colors';
interface TokenAmountInputProps {
userAddress: string;
networkId: number;
blockchain: Blockchain;
token: Token;
label?: string;
amount?: BigNumber;
shouldShowIncompleteErrs: boolean;
shouldCheckBalance: boolean;
shouldCheckAllowance: boolean;
onChange: ValidatedBigNumberCallback;
onVisitBalancesPageClick?: () => void;
lastForceTokenStateRefetch: number;
}
interface TokenAmountInputState {
balance: BigNumber;
allowance: BigNumber;
isBalanceAndAllowanceLoaded: boolean;
}
export class TokenAmountInput extends React.Component<TokenAmountInputProps, TokenAmountInputState> {
private _isUnmounted: boolean;
constructor(props: TokenAmountInputProps) {
super(props);
this._isUnmounted = false;
const defaultAmount = new BigNumber(0);
this.state = {
balance: defaultAmount,
allowance: defaultAmount,
isBalanceAndAllowanceLoaded: false,
};
}
public componentWillMount() {
// tslint:disable-next-line:no-floating-promises
this._fetchBalanceAndAllowanceAsync(this.props.token.address, this.props.userAddress);
}
public componentWillUnmount() {
this._isUnmounted = true;
}
public componentWillReceiveProps(nextProps: TokenAmountInputProps) {
if (
nextProps.userAddress !== this.props.userAddress ||
nextProps.networkId !== this.props.networkId ||
nextProps.token.address !== this.props.token.address ||
nextProps.lastForceTokenStateRefetch !== this.props.lastForceTokenStateRefetch
) {
// tslint:disable-next-line:no-floating-promises
this._fetchBalanceAndAllowanceAsync(nextProps.token.address, nextProps.userAddress);
}
}
public render() {
const amount = this.props.amount
? ZeroEx.toUnitAmount(this.props.amount, this.props.token.decimals)
: undefined;
const hasLabel = !_.isUndefined(this.props.label);
return (
<div className="flex overflow-hidden" style={{ height: hasLabel ? 84 : 62 }}>
<BalanceBoundedInput
label={this.props.label}
amount={amount}
balance={ZeroEx.toUnitAmount(this.state.balance, this.props.token.decimals)}
onChange={this._onChange.bind(this)}
validate={this._validate.bind(this)}
shouldCheckBalance={this.props.shouldCheckBalance}
shouldShowIncompleteErrs={this.props.shouldShowIncompleteErrs}
onVisitBalancesPageClick={this.props.onVisitBalancesPageClick}
isDisabled={!this.state.isBalanceAndAllowanceLoaded}
/>
<div style={{ paddingTop: hasLabel ? 39 : 14 }}>{this.props.token.symbol}</div>
</div>
);
}
private _onChange(isValid: boolean, amount?: BigNumber) {
let baseUnitAmount;
if (!_.isUndefined(amount)) {
baseUnitAmount = ZeroEx.toBaseUnitAmount(amount, this.props.token.decimals);
}
this.props.onChange(isValid, baseUnitAmount);
}
private _validate(amount: BigNumber): InputErrMsg {
if (this.props.shouldCheckAllowance && amount.gt(this.state.allowance)) {
return (
<span>
Insufficient allowance.{' '}
<Link
to={`${WebsitePaths.Portal}/balances`}
style={{ cursor: 'pointer', color: colors.darkestGrey }}
>
Set allowance
</Link>
</span>
);
} else {
return undefined;
}
}
private async _fetchBalanceAndAllowanceAsync(tokenAddress: string, userAddress: string) {
this.setState({
isBalanceAndAllowanceLoaded: false,
});
const [balance, allowance] = await this.props.blockchain.getTokenBalanceAndAllowanceAsync(
userAddress,
tokenAddress,
);
if (!this._isUnmounted) {
this.setState({
balance,
allowance,
isBalanceAndAllowanceLoaded: true,
});
}
}
}
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