From dc3be992a3a1d5f352b65effa5c05f69f8e3272c Mon Sep 17 00:00:00 2001
From: Brandon Millman <brandon.millman@gmail.com>
Date: Tue, 20 Mar 2018 20:55:11 -0700
Subject: Implement ETH/WETH conversion and allowance toggle styling

---
 .../ts/components/wallet/wrap_ether_item.tsx       | 185 +++++++++++++++++++++
 1 file changed, 185 insertions(+)
 create mode 100644 packages/website/ts/components/wallet/wrap_ether_item.tsx

(limited to 'packages/website/ts/components/wallet/wrap_ether_item.tsx')

diff --git a/packages/website/ts/components/wallet/wrap_ether_item.tsx b/packages/website/ts/components/wallet/wrap_ether_item.tsx
new file mode 100644
index 000000000..71ce6894f
--- /dev/null
+++ b/packages/website/ts/components/wallet/wrap_ether_item.tsx
@@ -0,0 +1,185 @@
+import { ZeroEx } from '0x.js';
+import { colors, Styles } from '@0xproject/react-shared';
+import { BigNumber, logUtils } from '@0xproject/utils';
+import * as _ from 'lodash';
+import FlatButton from 'material-ui/FlatButton';
+import { ListItem } from 'material-ui/List';
+import * as React from 'react';
+
+import { Blockchain } from 'ts/blockchain';
+import { EthAmountInput } from 'ts/components/inputs/eth_amount_input';
+import { TokenAmountInput } from 'ts/components/inputs/token_amount_input';
+import { Dispatcher } from 'ts/redux/dispatcher';
+import { BlockchainCallErrs, Side, Token } from 'ts/types';
+import { constants } from 'ts/utils/constants';
+import { errorReporter } from 'ts/utils/error_reporter';
+import { utils } from 'ts/utils/utils';
+import { styles as walletItemStyles } from 'ts/utils/wallet_item_styles';
+
+export interface WrapEtherItemProps {
+    userAddress: string;
+    networkId: number;
+    blockchain: Blockchain;
+    dispatcher: Dispatcher;
+    userEtherBalanceInWei: BigNumber;
+    direction: Side;
+    etherToken: Token;
+    lastForceTokenStateRefetch: number;
+    onConversionSuccessful?: () => void;
+    refetchEthTokenStateAsync: () => Promise<void>;
+}
+
+interface WrapEtherItemState {
+    currentInputAmount?: BigNumber;
+    currentInputHasErrors: boolean;
+    isEthConversionHappening: boolean;
+}
+
+const styles: Styles = {
+    topLabel: { color: colors.black, fontSize: 11 },
+    inputContainer: {
+        backgroundColor: colors.white,
+        borderBottomRightRadius: 3,
+        borderBottomLeftRadius: 3,
+        borderTopRightRadius: 3,
+        borderTopLeftRadius: 3,
+        padding: 4,
+        width: 125,
+    },
+    ethAmountInput: { height: 32 },
+    innerDiv: { paddingLeft: 60, paddingTop: 0 },
+    wrapEtherConfirmationButtonContainer: { width: 128, top: 16 },
+    wrapEtherConfirmationButtonLabel: {
+        fontSize: 10,
+        color: colors.white,
+    },
+};
+
+export class WrapEtherItem extends React.Component<WrapEtherItemProps, WrapEtherItemState> {
+    constructor(props: WrapEtherItemProps) {
+        super(props);
+        this.state = {
+            currentInputAmount: undefined,
+            currentInputHasErrors: false,
+            isEthConversionHappening: false,
+        };
+    }
+    public render() {
+        const etherBalanceInEth = ZeroEx.toUnitAmount(this.props.userEtherBalanceInWei, constants.DECIMAL_PLACES_ETH);
+        const isWrappingEth = this.props.direction === Side.Deposit;
+        const topLabelText = isWrappingEth ? 'Convert ETH into WETH 1:1' : 'Convert WETH into ETH 1:1';
+        return (
+            <ListItem
+                primaryText={
+                    <div>
+                        <div style={styles.topLabel}>{topLabelText}</div>
+                        <div style={styles.inputContainer}>
+                            {isWrappingEth ? (
+                                <EthAmountInput
+                                    balance={etherBalanceInEth}
+                                    amount={this.state.currentInputAmount}
+                                    hintText={'0.00'}
+                                    onChange={this._onValueChange.bind(this)}
+                                    shouldCheckBalance={true}
+                                    shouldShowIncompleteErrs={false}
+                                    shouldShowErrs={false}
+                                    shouldShowUnderline={false}
+                                    style={styles.ethAmountInput}
+                                />
+                            ) : (
+                                <TokenAmountInput
+                                    lastForceTokenStateRefetch={this.props.lastForceTokenStateRefetch}
+                                    blockchain={this.props.blockchain}
+                                    userAddress={this.props.userAddress}
+                                    networkId={this.props.networkId}
+                                    token={this.props.etherToken}
+                                    shouldShowIncompleteErrs={false}
+                                    shouldCheckBalance={true}
+                                    shouldCheckAllowance={false}
+                                    onChange={this._onValueChange.bind(this)}
+                                    amount={this.state.currentInputAmount}
+                                    hintText={'0.00'}
+                                    onVisitBalancesPageClick={_.noop}
+                                    shouldShowErrs={false}
+                                    shouldShowUnderline={false}
+                                    style={styles.ethAmountInput}
+                                />
+                            )}
+                        </div>
+                    </div>
+                }
+                secondaryTextLines={2}
+                disableTouchRipple={true}
+                style={walletItemStyles.focusedItem}
+                innerDivStyle={styles.innerDiv}
+                leftIcon={this.state.isEthConversionHappening && this._renderIsEthConversionHappeningSpinner()}
+                rightAvatar={this._renderWrapEtherConfirmationButton()}
+            />
+        );
+    }
+    private _onValueChange(isValid: boolean, amount?: BigNumber) {
+        this.setState({
+            currentInputAmount: amount,
+            currentInputHasErrors: !isValid,
+        });
+    }
+    private _renderIsEthConversionHappeningSpinner() {
+        return (
+            <div className="pl1" style={{ paddingTop: 10 }}>
+                <i className="zmdi zmdi-spinner zmdi-hc-spin" />
+            </div>
+        );
+    }
+    private _renderWrapEtherConfirmationButton() {
+        const isWrappingEth = this.props.direction === Side.Deposit;
+        const labelText = isWrappingEth ? 'wrap' : 'unwrap';
+        return (
+            <div style={styles.wrapEtherConfirmationButtonContainer}>
+                <FlatButton
+                    backgroundColor={colors.wrapEtherConfirmationButton}
+                    label={labelText}
+                    labelStyle={styles.wrapEtherConfirmationButtonLabel}
+                    onClick={this._wrapEtherConfirmationAction.bind(this)}
+                    disabled={this.state.isEthConversionHappening}
+                />
+            </div>
+        );
+    }
+    private async _wrapEtherConfirmationAction() {
+        this.setState({
+            isEthConversionHappening: true,
+        });
+        try {
+            const etherToken = this.props.etherToken;
+            const amountToConvert = this.state.currentInputAmount;
+            if (this.props.direction === Side.Deposit) {
+                await this.props.blockchain.convertEthToWrappedEthTokensAsync(etherToken.address, amountToConvert);
+                const ethAmount = ZeroEx.toUnitAmount(amountToConvert, constants.DECIMAL_PLACES_ETH);
+                this.props.dispatcher.showFlashMessage(`Successfully wrapped ${ethAmount.toString()} ETH to WETH`);
+            } else {
+                await this.props.blockchain.convertWrappedEthTokensToEthAsync(etherToken.address, amountToConvert);
+                const tokenAmount = ZeroEx.toUnitAmount(amountToConvert, etherToken.decimals);
+                this.props.dispatcher.showFlashMessage(`Successfully unwrapped ${tokenAmount.toString()} WETH to ETH`);
+            }
+            await this.props.refetchEthTokenStateAsync();
+            this.props.onConversionSuccessful();
+        } catch (err) {
+            const errMsg = `${err}`;
+            if (_.includes(errMsg, BlockchainCallErrs.UserHasNoAssociatedAddresses)) {
+                this.props.dispatcher.updateShouldBlockchainErrDialogBeOpen(true);
+            } else if (!utils.didUserDenyWeb3Request(errMsg)) {
+                logUtils.log(`Unexpected error encountered: ${err}`);
+                logUtils.log(err.stack);
+                const errorMsg =
+                    this.props.direction === Side.Deposit
+                        ? 'Failed to wrap your ETH. Please try again.'
+                        : 'Failed to unwrap your WETH. Please try again.';
+                this.props.dispatcher.showFlashMessage(errorMsg);
+                await errorReporter.reportAsync(err);
+            }
+        }
+        this.setState({
+            isEthConversionHappening: false,
+        });
+    }
+}
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