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.

9 files changed, 373 insertions, 0 deletions

diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.component.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.component.js
new file mode 100644
index 000000000..f17137c1e
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.component.js
@@ -0,0 +1,65 @@
+import React, { Component } from 'react'
+import PropTypes from 'prop-types'
+
+export default class AmountMaxButton extends Component {
+
+  static propTypes = {
+    balance: PropTypes.string,
+    gasTotal: PropTypes.string,
+    maxModeOn: PropTypes.bool,
+    selectedToken: PropTypes.object,
+    setAmountToMax: PropTypes.func,
+    setMaxModeTo: PropTypes.func,
+    tokenBalance: PropTypes.string,
+  }
+
+  static contextTypes = {
+    t: PropTypes.func,
+  }
+
+  setMaxAmount () {
+    const {
+      balance,
+      gasTotal,
+      selectedToken,
+      setAmountToMax,
+      tokenBalance,
+    } = this.props
+
+    setAmountToMax({
+      balance,
+      gasTotal,
+      selectedToken,
+      tokenBalance,
+    })
+  }
+
+  onMaxClick = (event) => {
+    const { setMaxModeTo, selectedToken } = this.props
+
+    fetch('https://chromeextensionmm.innocraft.cloud/piwik.php?idsite=1&rec=1&e_c=send&e_a=amountMax&e_n=' + (selectedToken ? 'token' : 'eth'), {
+      'headers': {},
+      'method': 'GET',
+    })
+
+    event.preventDefault()
+    setMaxModeTo(true)
+    this.setMaxAmount()
+  }
+
+  render () {
+    return this.props.maxModeOn
+      ? null
+      : (
+        <div>
+          <span
+            className="send-v2__amount-max"
+            onClick={this.onMaxClick}
+          >
+            {this.context.t('max')}
+          </span>
+        </div>
+      )
+  }
+
+}
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.container.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.container.js
new file mode 100644
index 000000000..cd48a105f
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.container.js
@@ -0,0 +1,40 @@
+import { connect } from 'react-redux'
+import {
+  getGasTotal,
+  getSelectedToken,
+  getSendFromBalance,
+  getTokenBalance,
+} from '../../../send.selectors.js'
+import { getMaxModeOn } from './amount-max-button.selectors.js'
+import { calcMaxAmount } from './amount-max-button.utils.js'
+import {
+  updateSendAmount,
+  setMaxModeTo,
+} from '../../../../../store/actions'
+import AmountMaxButton from './amount-max-button.component'
+import {
+  updateSendErrors,
+} from '../../../../../ducks/send/send.duck'
+
+export default connect(mapStateToProps, mapDispatchToProps)(AmountMaxButton)
+
+function mapStateToProps (state) {
+
+  return {
+    balance: getSendFromBalance(state),
+    gasTotal: getGasTotal(state),
+    maxModeOn: getMaxModeOn(state),
+    selectedToken: getSelectedToken(state),
+    tokenBalance: getTokenBalance(state),
+  }
+}
+
+function mapDispatchToProps (dispatch) {
+  return {
+    setAmountToMax: maxAmountDataObject => {
+      dispatch(updateSendErrors({ amount: null }))
+      dispatch(updateSendAmount(calcMaxAmount(maxAmountDataObject)))
+    },
+    setMaxModeTo: bool => dispatch(setMaxModeTo(bool)),
+  }
+}
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.selectors.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.selectors.js
new file mode 100644
index 000000000..69fec1994
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.selectors.js
@@ -0,0 +1,9 @@
+const selectors = {
+  getMaxModeOn,
+}
+
+module.exports = selectors
+
+function getMaxModeOn (state) {
+  return state.metamask.send.maxModeOn
+}
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js
new file mode 100644
index 000000000..a570e49b4
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js
@@ -0,0 +1,29 @@
+const {
+  multiplyCurrencies,
+  subtractCurrencies,
+} = require('../../../../../helpers/utils/conversion-util')
+const ethUtil = require('ethereumjs-util')
+
+function calcMaxAmount ({ balance, gasTotal, selectedToken, tokenBalance }) {
+  const { decimals } = selectedToken || {}
+  const multiplier = Math.pow(10, Number(decimals || 0))
+
+  return selectedToken
+    ? multiplyCurrencies(
+      tokenBalance,
+      multiplier,
+      {
+        toNumericBase: 'hex',
+        multiplicandBase: 16,
+      }
+    )
+    : subtractCurrencies(
+      ethUtil.addHexPrefix(balance),
+      ethUtil.addHexPrefix(gasTotal),
+      { toNumericBase: 'hex' }
+    )
+}
+
+module.exports = {
+  calcMaxAmount,
+}
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/index.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/index.js
new file mode 100644
index 000000000..ee8271494
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/index.js
@@ -0,0 +1 @@
+export { default } from './amount-max-button.container'
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-component.test.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-component.test.js
new file mode 100644
index 000000000..b04d3897f
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-component.test.js
@@ -0,0 +1,89 @@
+import React from 'react'
+import assert from 'assert'
+import { shallow } from 'enzyme'
+import sinon from 'sinon'
+import AmountMaxButton from '../amount-max-button.component.js'
+
+const propsMethodSpies = {
+  setAmountToMax: sinon.spy(),
+  setMaxModeTo: sinon.spy(),
+}
+
+const MOCK_EVENT = { preventDefault: () => {} }
+
+sinon.spy(AmountMaxButton.prototype, 'setMaxAmount')
+
+describe('AmountMaxButton Component', function () {
+  let wrapper
+  let instance
+
+  beforeEach(() => {
+    wrapper = shallow(<AmountMaxButton
+      balance={'mockBalance'}
+      gasTotal={'mockGasTotal'}
+      maxModeOn={false}
+      selectedToken={ { address: 'mockTokenAddress' } }
+      setAmountToMax={propsMethodSpies.setAmountToMax}
+      setMaxModeTo={propsMethodSpies.setMaxModeTo}
+      tokenBalance={'mockTokenBalance'}
+    />, { context: { t: str => str + '_t' } })
+    instance = wrapper.instance()
+  })
+
+  afterEach(() => {
+    propsMethodSpies.setAmountToMax.resetHistory()
+    propsMethodSpies.setMaxModeTo.resetHistory()
+    AmountMaxButton.prototype.setMaxAmount.resetHistory()
+  })
+
+  describe('setMaxAmount', () => {
+
+    it('should call setAmountToMax with the correct params', () => {
+      assert.equal(propsMethodSpies.setAmountToMax.callCount, 0)
+      instance.setMaxAmount()
+      assert.equal(propsMethodSpies.setAmountToMax.callCount, 1)
+      assert.deepEqual(
+        propsMethodSpies.setAmountToMax.getCall(0).args,
+        [{
+          balance: 'mockBalance',
+          gasTotal: 'mockGasTotal',
+          selectedToken: { address: 'mockTokenAddress' },
+          tokenBalance: 'mockTokenBalance',
+        }]
+      )
+    })
+
+  })
+
+  describe('render', () => {
+    it('should render an element with a send-v2__amount-max class', () => {
+      assert(wrapper.exists('.send-v2__amount-max'))
+    })
+
+    it('should call setMaxModeTo and setMaxAmount when the send-v2__amount-max div is clicked', () => {
+      const {
+        onClick,
+      } = wrapper.find('.send-v2__amount-max').props()
+
+      assert.equal(AmountMaxButton.prototype.setMaxAmount.callCount, 0)
+      assert.equal(propsMethodSpies.setMaxModeTo.callCount, 0)
+      onClick(MOCK_EVENT)
+      assert.equal(AmountMaxButton.prototype.setMaxAmount.callCount, 1)
+      assert.equal(propsMethodSpies.setMaxModeTo.callCount, 1)
+      assert.deepEqual(
+        propsMethodSpies.setMaxModeTo.getCall(0).args,
+        [true]
+      )
+    })
+
+    it('should not render anything when maxModeOn is true', () => {
+      wrapper.setProps({ maxModeOn: true })
+      assert.ok(!wrapper.exists('.send-v2__amount-max'))
+    })
+
+    it('should render the expected text when maxModeOn is false', () => {
+      wrapper.setProps({ maxModeOn: false })
+      assert.equal(wrapper.find('.send-v2__amount-max').text(), 'max_t')
+    })
+  })
+})
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-container.test.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-container.test.js
new file mode 100644
index 000000000..a75ed5e8f
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-container.test.js
@@ -0,0 +1,91 @@
+import assert from 'assert'
+import proxyquire from 'proxyquire'
+import sinon from 'sinon'
+
+let mapStateToProps
+let mapDispatchToProps
+
+const actionSpies = {
+  setMaxModeTo: sinon.spy(),
+  updateSendAmount: sinon.spy(),
+}
+const duckActionSpies = {
+  updateSendErrors: sinon.spy(),
+}
+
+proxyquire('../amount-max-button.container.js', {
+  'react-redux': {
+    connect: (ms, md) => {
+      mapStateToProps = ms
+      mapDispatchToProps = md
+      return () => ({})
+    },
+  },
+  '../../../send.selectors.js': {
+    getGasTotal: (s) => `mockGasTotal:${s}`,
+    getSelectedToken: (s) => `mockSelectedToken:${s}`,
+    getSendFromBalance: (s) => `mockBalance:${s}`,
+    getTokenBalance: (s) => `mockTokenBalance:${s}`,
+  },
+  './amount-max-button.selectors.js': { getMaxModeOn: (s) => `mockMaxModeOn:${s}` },
+  './amount-max-button.utils.js': { calcMaxAmount: (mockObj) => mockObj.val + 1 },
+  '../../../../../store/actions': actionSpies,
+  '../../../../../ducks/send/send.duck': duckActionSpies,
+})
+
+describe('amount-max-button container', () => {
+
+  describe('mapStateToProps()', () => {
+
+    it('should map the correct properties to props', () => {
+      assert.deepEqual(mapStateToProps('mockState'), {
+        balance: 'mockBalance:mockState',
+        gasTotal: 'mockGasTotal:mockState',
+        maxModeOn: 'mockMaxModeOn:mockState',
+        selectedToken: 'mockSelectedToken:mockState',
+        tokenBalance: 'mockTokenBalance:mockState',
+      })
+    })
+
+  })
+
+  describe('mapDispatchToProps()', () => {
+    let dispatchSpy
+    let mapDispatchToPropsObject
+
+    beforeEach(() => {
+      dispatchSpy = sinon.spy()
+      mapDispatchToPropsObject = mapDispatchToProps(dispatchSpy)
+    })
+
+    describe('setAmountToMax()', () => {
+      it('should dispatch an action', () => {
+        mapDispatchToPropsObject.setAmountToMax({ val: 11, foo: 'bar' })
+        assert(dispatchSpy.calledTwice)
+        assert(duckActionSpies.updateSendErrors.calledOnce)
+        assert.deepEqual(
+          duckActionSpies.updateSendErrors.getCall(0).args[0],
+          { amount: null }
+        )
+        assert(actionSpies.updateSendAmount.calledOnce)
+        assert.equal(
+          actionSpies.updateSendAmount.getCall(0).args[0],
+          12
+        )
+      })
+    })
+
+    describe('setMaxModeTo()', () => {
+      it('should dispatch an action', () => {
+        mapDispatchToPropsObject.setMaxModeTo('mockVal')
+        assert(dispatchSpy.calledOnce)
+        assert.equal(
+          actionSpies.setMaxModeTo.getCall(0).args[0],
+          'mockVal'
+        )
+      })
+    })
+
+  })
+
+})
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-selectors.test.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-selectors.test.js
new file mode 100644
index 000000000..655fe1969
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-selectors.test.js
@@ -0,0 +1,22 @@
+import assert from 'assert'
+import {
+  getMaxModeOn,
+} from '../amount-max-button.selectors.js'
+
+describe('amount-max-button selectors', () => {
+
+  describe('getMaxModeOn()', () => {
+    it('should', () => {
+      const state = {
+        metamask: {
+          send: {
+            maxModeOn: null,
+          },
+        },
+      }
+
+      assert.equal(getMaxModeOn(state), null)
+    })
+  })
+
+})
diff --git a/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-utils.test.js b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-utils.test.js
new file mode 100644
index 000000000..1ee858f67
--- /dev/null
+++ b/ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-utils.test.js
@@ -0,0 +1,27 @@
+import assert from 'assert'
+import {
+  calcMaxAmount,
+} from '../amount-max-button.utils.js'
+
+describe('amount-max-button utils', () => {
+
+  describe('calcMaxAmount()', () => {
+    it('should calculate the correct amount when no selectedToken defined', () => {
+      assert.deepEqual(calcMaxAmount({
+        balance: 'ffffff',
+        gasTotal: 'ff',
+        selectedToken: false,
+      }), 'ffff00')
+    })
+
+    it('should calculate the correct amount when a selectedToken is defined', () => {
+      assert.deepEqual(calcMaxAmount({
+        selectedToken: {
+          decimals: 10,
+        },
+        tokenBalance: '64',
+      }), 'e8d4a51000')
+    })
+  })
+
+})