From ea0067d99976a572dcd4a4d988f4d33ca083f230 Mon Sep 17 00:00:00 2001
From: fragosti <francesco.agosti93@gmail.com>
Date: Wed, 16 May 2018 17:06:57 -0700
Subject: Show error messages in the wrapped ether item

---
 .../ts/components/inputs/balance_bounded_input.tsx | 32 ++++++++++----------
 .../ts/components/inputs/eth_amount_input.tsx      |  2 ++
 .../ts/components/inputs/token_amount_input.tsx    |  2 ++
 .../ts/components/wallet/wrap_ether_item.tsx       | 34 +++++++++++++++++-----
 packages/website/ts/types.ts                       |  2 +-
 packages/website/ts/utils/utils.ts                 |  3 ++
 6 files changed, 52 insertions(+), 23 deletions(-)

(limited to 'packages/website')

diff --git a/packages/website/ts/components/inputs/balance_bounded_input.tsx b/packages/website/ts/components/inputs/balance_bounded_input.tsx
index 68b77cfc3..72a246280 100644
--- a/packages/website/ts/components/inputs/balance_bounded_input.tsx
+++ b/packages/website/ts/components/inputs/balance_bounded_input.tsx
@@ -14,6 +14,7 @@ interface BalanceBoundedInputProps {
     amount?: BigNumber;
     hintText?: string;
     onChange: ValidatedBigNumberCallback;
+    onErrorMsgChange?: (errorMsg: React.ReactNode) => void;
     shouldShowIncompleteErrs?: boolean;
     shouldCheckBalance: boolean;
     validate?: (amount: BigNumber) => InputErrMsg;
@@ -36,6 +37,7 @@ export class BalanceBoundedInput extends React.Component<BalanceBoundedInputProp
         isDisabled: false,
         shouldShowErrs: true,
         hintText: 'amount',
+        onErrorMsgChange: utils.noop,
         shouldShowUnderline: true,
     };
     constructor(props: BalanceBoundedInputProps) {
@@ -63,17 +65,11 @@ export class BalanceBoundedInput extends React.Component<BalanceBoundedInputProp
             }
             if (shouldResetState) {
                 const amountString = nextProps.amount.toString();
-                this.setState({
-                    errMsg: this._validate(amountString, nextProps.balance),
-                    amountString,
-                });
+                this._setAmountState(amountString, nextProps.balance);
             }
         } else if (isCurrentAmountNumeric) {
             const amountString = '';
-            this.setState({
-                errMsg: this._validate(amountString, nextProps.balance),
-                amountString,
-            });
+            this._setAmountState(amountString, nextProps.balance);
         }
     }
     public render(): React.ReactNode {
@@ -105,14 +101,11 @@ export class BalanceBoundedInput extends React.Component<BalanceBoundedInputProp
         );
     }
     private _onValueChange(e: any, amountString: string): void {
-        const errMsg = this._validate(amountString, this.props.balance);
-        this.setState(
-            {
-                amountString,
-                errMsg,
-            },
+        this._setAmountState(
+            amountString,
+            this.props.balance,
             () => {
-                const isValid = _.isUndefined(errMsg);
+                const isValid = _.isUndefined(this._validate(amountString, this.props.balance));
                 if (utils.isNumeric(amountString) && !_.includes(amountString, '-')) {
                     this.props.onChange(isValid, new BigNumber(amountString));
                 } else {
@@ -161,4 +154,13 @@ export class BalanceBoundedInput extends React.Component<BalanceBoundedInputProp
             );
         }
     }
+
+    private _setAmountState(amount: string, balance: BigNumber, callback: () => void = utils.noop): void {
+        const errorMsg = this._validate(amount, balance);
+        this.props.onErrorMsgChange(errorMsg);
+        this.setState({
+            amountString: amount,
+            errMsg: this._validate(amount, balance),
+        }, callback);
+    }
 }
diff --git a/packages/website/ts/components/inputs/eth_amount_input.tsx b/packages/website/ts/components/inputs/eth_amount_input.tsx
index c3822a80b..862ba25f8 100644
--- a/packages/website/ts/components/inputs/eth_amount_input.tsx
+++ b/packages/website/ts/components/inputs/eth_amount_input.tsx
@@ -12,6 +12,7 @@ interface EthAmountInputProps {
     amount?: BigNumber;
     hintText?: string;
     onChange: ValidatedBigNumberCallback;
+    onErrorMsgChange?: (errorMsg: React.ReactNode) => void;
     shouldShowIncompleteErrs: boolean;
     onVisitBalancesPageClick?: () => void;
     shouldCheckBalance: boolean;
@@ -40,6 +41,7 @@ export class EthAmountInput extends React.Component<EthAmountInputProps, EthAmou
                     balance={this.props.balance}
                     amount={amount}
                     onChange={this._onChange.bind(this)}
+                    onErrorMsgChange={this.props.onErrorMsgChange}
                     shouldCheckBalance={this.props.shouldCheckBalance}
                     shouldShowIncompleteErrs={this.props.shouldShowIncompleteErrs}
                     onVisitBalancesPageClick={this.props.onVisitBalancesPageClick}
diff --git a/packages/website/ts/components/inputs/token_amount_input.tsx b/packages/website/ts/components/inputs/token_amount_input.tsx
index 9a74bdd51..3ff2c5440 100644
--- a/packages/website/ts/components/inputs/token_amount_input.tsx
+++ b/packages/website/ts/components/inputs/token_amount_input.tsx
@@ -20,6 +20,7 @@ interface TokenAmountInputProps {
     shouldCheckBalance: boolean;
     shouldCheckAllowance: boolean;
     onChange: ValidatedBigNumberCallback;
+    onErrorMsgChange?: (errorMsg: React.ReactNode) => void;
     onVisitBalancesPageClick?: () => void;
     lastForceTokenStateRefetch: number;
     shouldShowErrs?: boolean;
@@ -85,6 +86,7 @@ export class TokenAmountInput extends React.Component<TokenAmountInputProps, Tok
                     amount={amount}
                     balance={ZeroEx.toUnitAmount(this.state.balance, this.props.token.decimals)}
                     onChange={this._onChange.bind(this)}
+                    onErrorMsgChange={this.props.onErrorMsgChange}
                     validate={this._validate.bind(this)}
                     shouldCheckBalance={this.props.shouldCheckBalance}
                     shouldShowIncompleteErrs={this.props.shouldShowIncompleteErrs}
diff --git a/packages/website/ts/components/wallet/wrap_ether_item.tsx b/packages/website/ts/components/wallet/wrap_ether_item.tsx
index 2ed924bcd..c8ced8d08 100644
--- a/packages/website/ts/components/wallet/wrap_ether_item.tsx
+++ b/packages/website/ts/components/wallet/wrap_ether_item.tsx
@@ -31,8 +31,8 @@ export interface WrapEtherItemProps {
 
 interface WrapEtherItemState {
     currentInputAmount?: BigNumber;
-    currentInputHasErrors: boolean;
     isEthConversionHappening: boolean;
+    errorMsg: React.ReactNode;
 }
 
 const styles: Styles = {
@@ -47,12 +47,18 @@ const styles: Styles = {
         width: 125,
     },
     ethAmountInput: { height: 32 },
-    innerDiv: { paddingLeft: 60, paddingTop: 0 },
-    wrapEtherConfirmationButtonContainer: { width: 128, top: 16 },
+    innerDiv: { paddingLeft: 60, paddingTop: 0, paddingBottom: 10 },
+    wrapEtherConfirmationButtonContainer: { width: 128, top: 18 },
     wrapEtherConfirmationButtonLabel: {
-        fontSize: 10,
+        fontSize: 12,
         color: colors.white,
     },
+    errorMsg: {
+        fontSize: 12,
+        marginTop: 4,
+        color: 'red',
+        minHeight: 20,
+    },
 };
 
 export class WrapEtherItem extends React.Component<WrapEtherItemProps, WrapEtherItemState> {
@@ -60,8 +66,8 @@ export class WrapEtherItem extends React.Component<WrapEtherItemProps, WrapEther
         super(props);
         this.state = {
             currentInputAmount: undefined,
-            currentInputHasErrors: false,
             isEthConversionHappening: false,
+            errorMsg: null,
         };
     }
     public render(): React.ReactNode {
@@ -85,6 +91,7 @@ export class WrapEtherItem extends React.Component<WrapEtherItemProps, WrapEther
                                     shouldShowErrs={false}
                                     shouldShowUnderline={false}
                                     style={styles.ethAmountInput}
+                                    onErrorMsgChange={this._onErrorMsgChange.bind(this)}
                                 />
                             ) : (
                                 <TokenAmountInput
@@ -99,12 +106,14 @@ export class WrapEtherItem extends React.Component<WrapEtherItemProps, WrapEther
                                     onChange={this._onValueChange.bind(this)}
                                     amount={this.state.currentInputAmount}
                                     hintText="0.00"
-                                    shouldShowErrs={false} // TODO: error handling
+                                    shouldShowErrs={false}
                                     shouldShowUnderline={false}
                                     style={styles.ethAmountInput}
+                                    onErrorMsgChange={this._onErrorMsgChange.bind(this)}
                                 />
                             )}
                         </div>
+                        {this._renderErrorMsg()}
                     </div>
                 }
                 secondaryTextLines={2}
@@ -119,7 +128,11 @@ export class WrapEtherItem extends React.Component<WrapEtherItemProps, WrapEther
     private _onValueChange(isValid: boolean, amount?: BigNumber): void {
         this.setState({
             currentInputAmount: amount,
-            currentInputHasErrors: !isValid,
+        });
+    }
+    private _onErrorMsgChange(errorMsg: React.ReactNode): void {
+        this.setState({
+            errorMsg,
         });
     }
     private _renderIsEthConversionHappeningSpinner(): React.ReactElement<{}> {
@@ -144,6 +157,13 @@ export class WrapEtherItem extends React.Component<WrapEtherItemProps, WrapEther
             </div>
         );
     }
+    private _renderErrorMsg(): React.ReactNode {
+        return (
+            <div style={styles.errorMsg}>
+                {this.state.errorMsg}
+            </div>
+        );
+    }
     private async _wrapEtherConfirmationActionAsync(): Promise<void> {
         this.setState({
             isEthConversionHappening: true,
diff --git a/packages/website/ts/types.ts b/packages/website/ts/types.ts
index 5caf5e73c..e3901fd81 100644
--- a/packages/website/ts/types.ts
+++ b/packages/website/ts/types.ts
@@ -208,7 +208,7 @@ export interface ContractEvent {
 }
 
 export type InputErrMsg = React.ReactNode | string | undefined;
-export type ValidatedBigNumberCallback = (isValid: boolean, amount?: BigNumber) => void;
+export type ValidatedBigNumberCallback = (isValid: boolean, amount?: BigNumber, errorMessage?: React.ReactNode) => void;
 export enum ScreenWidths {
     Sm = 'SM',
     Md = 'MD',
diff --git a/packages/website/ts/utils/utils.ts b/packages/website/ts/utils/utils.ts
index 3c99bd2fe..5a0ab934d 100644
--- a/packages/website/ts/utils/utils.ts
+++ b/packages/website/ts/utils/utils.ts
@@ -27,6 +27,9 @@ const MD_MIN_EM = 52;
 const isDogfood = (): boolean => _.includes(window.location.href, configs.DOMAIN_DOGFOOD);
 
 export const utils = {
+    noop(): void {
+        return undefined;
+    },
     assert(condition: boolean, message: string): void {
         if (!condition) {
             throw new Error(message);
-- 
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