@bzxnetwork/portal/src/balances/AddToken.jsx

Frontend demo portal for bZx

import styled from "styled-components";
// import Typography from "@material-ui/core/Typography";
import Button from "@material-ui/core/Button";
import Section, { SectionLabel } from "../common/FormSection";
import TokenPicker from "../common/TokenPicker";
import { addTrackedToken } from "../common/trackedTokens";

const Container = styled.div`
  display: flex;
  flex-direction: column;
  align-items: center;

  & > *:first-child {
    margin-bottom: 12px;
  }
`;

const defaultToken = tokens => {
  let token = tokens.filter(t => t.symbol === `KNC`);
  if (token.length > 0) {
    token = token[0]; // eslint-disable-line prefer-destructuring
  } else {
    token = tokens[0]; // eslint-disable-line prefer-destructuring
  }
  return token;
};

export default class AddToken extends React.Component {
  state = {
    tokenAddress: defaultToken(this.props.tokens).address
  };

  setTokenAddress = addr => this.setState({ tokenAddress: addr });

  handleAddTrackedToken = () => {
    addTrackedToken(this.props.tokens, this.state.tokenAddress);
    this.props.updateTrackedTokens();
  };

  render() {
    const { tokens } = this.props;
    return (
      <Section>
        <SectionLabel>Add new tracked token</SectionLabel>
        <Container>
          <TokenPicker
            tokens={tokens}
            setAddress={this.setTokenAddress}
            value={this.state.tokenAddress}
          />
          <Button
            variant="raised"
            color="primary"
            onClick={this.handleAddTrackedToken}
          >
            Add Token
          </Button>
        </Container>
      </Section>
    );
  }
}