Add token selection to the send screen (#6445)

* Move send to pages/

* Fix unit tests

* Finish UI

* Integrate asset dropdown to send actions

* Remove console.log

* Hide asset change during edit

* Enable switch from send token to seand eth

* Enable switching from token to eth when editing

* Fix linter

* Fixing test

* Fix unit tests

* Fix linter

* Fix react warning; remove console.log

* fix flat test

* Add metrics

* Address code review comments

* Consistent spacing between send screen form rows.

* Reduce height of gas buttons on send screen.

* Make send screen gas button height dependent on size of contents.

1 files changed, 152 insertions, 0 deletions

diff --git a/ui/app/pages/send/send-content/send-asset-row/send-asset-row.component.js b/ui/app/pages/send/send-content/send-asset-row/send-asset-row.component.js
new file mode 100644
index 000000000..256271a17
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-asset-row/send-asset-row.component.js
@@ -0,0 +1,152 @@
+import React, { Component } from 'react'
+import PropTypes from 'prop-types'
+import SendRowWrapper from '../send-row-wrapper'
+import Identicon from '../../../../components/ui/identicon/identicon.component'
+import TokenBalance from '../../../../components/ui/token-balance'
+import UserPreferencedCurrencyDisplay from '../../../../components/app/user-preferenced-currency-display'
+import {PRIMARY} from '../../../../helpers/constants/common'
+
+export default class SendAssetRow extends Component {
+  static propTypes = {
+    tokens: PropTypes.arrayOf(
+      PropTypes.shape({
+        address: PropTypes.string,
+        decimals: PropTypes.string,
+        symbol: PropTypes.string,
+      })
+    ).isRequired,
+    accounts: PropTypes.object.isRequired,
+    selectedAddress: PropTypes.string.isRequired,
+    selectedTokenAddress: PropTypes.string,
+    setSelectedToken: PropTypes.func.isRequired,
+  }
+
+  static contextTypes = {
+    t: PropTypes.func,
+    metricsEvent: PropTypes.func,
+  }
+
+  state = {
+    isShowingDropdown: false,
+  }
+
+  openDropdown = () => this.setState({ isShowingDropdown: true })
+
+  closeDropdown = () => this.setState({ isShowingDropdown: false })
+
+  selectToken = address => {
+    this.setState({
+      isShowingDropdown: false,
+    }, () => {
+      this.context.metricsEvent({
+        eventOpts: {
+          category: 'Transactions',
+          action: 'Send Screen',
+          name: 'User clicks "Assets" dropdown',
+        },
+        customVariables: {
+          assetSelected: address ? 'ERC20' : 'ETH',
+        },
+      })
+      this.props.setSelectedToken(address)
+    })
+  }
+
+  render () {
+    const { t } = this.context
+
+    return (
+      <SendRowWrapper label={`${t('asset')}:`}>
+        <div className="send-v2__asset-dropdown">
+          { this.renderSelectedToken() }
+          { this.renderAssetDropdown() }
+        </div>
+      </SendRowWrapper>
+    )
+  }
+
+  renderSelectedToken () {
+    const { selectedTokenAddress } = this.props
+    const token = this.props.tokens.find(({ address }) => address === selectedTokenAddress)
+    return (
+      <div
+        className="send-v2__asset-dropdown__input-wrapper"
+        onClick={this.openDropdown}
+      >
+        { token ? this.renderAsset(token) : this.renderEth() }
+      </div>
+    )
+  }
+
+  renderAssetDropdown () {
+    return this.state.isShowingDropdown && (
+      <div>
+        <div
+          className="send-v2__asset-dropdown__close-area"
+          onClick={this.closeDropdown}
+        />
+        <div className="send-v2__asset-dropdown__list">
+          { this.renderEth() }
+          { this.props.tokens.map(token => this.renderAsset(token)) }
+        </div>
+      </div>
+    )
+  }
+
+  renderEth () {
+    const { t } = this.context
+    const { accounts, selectedAddress } = this.props
+
+    const balanceValue = accounts[selectedAddress] ? accounts[selectedAddress].balance : ''
+
+    return (
+      <div
+        className="send-v2__asset-dropdown__asset"
+        onClick={() => this.selectToken()}
+      >
+        <div className="send-v2__asset-dropdown__asset-icon">
+          <Identicon diameter={36} />
+        </div>
+        <div className="send-v2__asset-dropdown__asset-data">
+          <div className="send-v2__asset-dropdown__symbol">ETH</div>
+          <div className="send-v2__asset-dropdown__name">
+            <span className="send-v2__asset-dropdown__name__label">{`${t('balance')}:`}</span>
+            <UserPreferencedCurrencyDisplay
+              value={balanceValue}
+              type={PRIMARY}
+            />
+          </div>
+        </div>
+      </div>
+    )
+  }
+
+
+  renderAsset (token) {
+    const { address, symbol } = token
+    const { t } = this.context
+
+    return (
+      <div
+        key={address} className="send-v2__asset-dropdown__asset"
+        onClick={() => this.selectToken(address)}
+      >
+        <div className="send-v2__asset-dropdown__asset-icon">
+          <Identicon address={address} diameter={36} />
+        </div>
+        <div className="send-v2__asset-dropdown__asset-data">
+          <div className="send-v2__asset-dropdown__symbol">
+            { symbol }
+          </div>
+          <div className="send-v2__asset-dropdown__name">
+            <span className="send-v2__asset-dropdown__name__label">{`${t('balance')}:`}</span>
+            <TokenBalance
+              token={token}
+              withSymbol
+            />
+          </div>
+        </div>
+      </div>
+    )
+  }
+}