openethereum/js/src/modals/Transfer/Details/tokenSelect.js

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import BigNumber from 'bignumber.js';
import React, { Component, PropTypes } from 'react';
import { MenuItem } from 'material-ui';
import { isEqual } from 'lodash';
import { Select } from '~/ui/Form';
import TokenImage from '~/ui/TokenImage';
import styles from '../transfer.css';
export default class TokenSelect extends Component {
static contextTypes = {
api: PropTypes.object
};
static propTypes = {
onChange: PropTypes.func.isRequired,
balance: PropTypes.object.isRequired,
tag: PropTypes.string.isRequired
};
componentWillMount () {
this.computeTokens();
}
componentWillReceiveProps (nextProps) {
const prevTokens = this.props.balance.tokens.map((t) => `${t.token.tag}_${t.value.toNumber()}`);
const nextTokens = nextProps.balance.tokens.map((t) => `${t.token.tag}_${t.value.toNumber()}`);
if (!isEqual(prevTokens, nextTokens)) {
this.computeTokens(nextProps);
}
}
computeTokens (props = this.props) {
const { api } = this.context;
const { balance } = this.props;
const items = balance.tokens
.filter((token, index) => !index || token.value.gt(0))
.map((balance, index) => {
const token = balance.token;
const isEth = index === 0;
let value = 0;
if (isEth) {
value = api.util.fromWei(balance.value).toFormat(3);
} else {
const format = balance.token.format || 1;
const decimals = format === 1 ? 0 : Math.min(3, Math.floor(format / 10));
value = new BigNumber(balance.value).div(format).toFormat(decimals);
}
const label = (
<div className={ styles.token }>
<TokenImage token={ token } />
<div className={ styles.tokenname }>
{ token.name }
</div>
<div className={ styles.tokenbalance }>
{ value }<small> { token.tag }</small>
</div>
</div>
);
return (
<MenuItem
key={ `${index}_${token.tag}` }
value={ token.tag }
label={ label }
>
{ label }
</MenuItem>
);
});
this.setState({ items });
}
render () {
const { tag, onChange } = this.props;
const { items } = this.state;
return (
<Select
className={ styles.tokenSelect }
label='type of token transfer'
hint='type of token to transfer'
value={ tag }
onChange={ onChange }
>
{ items }
</Select>
);
}
}