Merge pull request #4897 from MetaMask/qr-code-scan

QR Code Scanner

14 files changed, 410 insertions, 4 deletions

diff --git a/ui/app/components/ens-input.js b/ui/app/components/ens-input.js
index b9f99b3d1..f538fd555 100644
--- a/ui/app/components/ens-input.js
+++ b/ui/app/components/ens-input.js
@@ -27,6 +27,7 @@ function EnsInput () {
 }
 
 EnsInput.prototype.onChange = function (recipient) {
+
   const network = this.props.network
   const networkHasEnsSupport = getNetworkEnsSupport(network)
 
@@ -54,6 +55,7 @@ EnsInput.prototype.render = function () {
   const opts = extend(props, {
     list: 'addresses',
     onChange: this.onChange.bind(this),
+    qrScanner: true,
   })
   return h('div', {
     style: { width: '100%', position: 'relative' },
diff --git a/ui/app/components/modals/index.scss b/ui/app/components/modals/index.scss
index e198cca44..0acccf172 100644
--- a/ui/app/components/modals/index.scss
+++ b/ui/app/components/modals/index.scss
@@ -1,5 +1,7 @@
 @import './customize-gas/index';
 
+@import './qr-scanner/index';
+
 .modal-container {
   width: 100%;
   height: 100%;
diff --git a/ui/app/components/modals/modal.js b/ui/app/components/modals/modal.js
index f59825ed1..5dda50e52 100644
--- a/ui/app/components/modals/modal.js
+++ b/ui/app/components/modals/modal.js
@@ -21,6 +21,7 @@ const CustomizeGasModal = require('../customize-gas-modal')
 const NotifcationModal = require('./notification-modal')
 const ConfirmResetAccount = require('./confirm-reset-account')
 const ConfirmRemoveAccount = require('./confirm-remove-account')
+const QRScanner = require('./qr-scanner')
 const TransactionConfirmed = require('./transaction-confirmed')
 const WelcomeBeta = require('./welcome-beta')
 const Notification = require('./notification')
@@ -346,6 +347,18 @@ const MODALS = {
       borderRadius: '8px',
     },
   },
+  QR_SCANNER: {
+    contents: h(QRScanner),
+    mobileModalStyle: {
+      ...modalContainerMobileStyle,
+    },
+    laptopModalStyle: {
+      ...modalContainerLaptopStyle,
+    },
+    contentStyle: {
+      borderRadius: '8px',
+    },
+  },
 
   DEFAULT: {
     contents: [],
diff --git a/ui/app/components/modals/qr-scanner/index.js b/ui/app/components/modals/qr-scanner/index.js
new file mode 100644
index 000000000..470dee1f4
--- /dev/null
+++ b/ui/app/components/modals/qr-scanner/index.js
@@ -0,0 +1,2 @@
+import QrScanner from './qr-scanner.container'
+module.exports = QrScanner
diff --git a/ui/app/components/modals/qr-scanner/index.scss b/ui/app/components/modals/qr-scanner/index.scss
new file mode 100644
index 000000000..6fa81d51f
--- /dev/null
+++ b/ui/app/components/modals/qr-scanner/index.scss
@@ -0,0 +1,83 @@
+.qr-scanner {
+  width: 100%;
+  height: 100%;
+  background-color: #fff;
+  display: flex;
+  flex-flow: column;
+  border-radius: 8px;
+
+  &__title {
+    font-size: 1.5rem;
+    font-weight: 500;
+    padding: 16px 0;
+    text-align: center;
+  }
+
+  &__content {
+    padding-left: 20px;
+    padding-right: 20px;
+
+    &__video-wrapper {
+      overflow: hidden;
+      width: 100%;
+      height: 275px;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+
+      video {
+        transform: scaleX(-1);
+        width: auto;
+        height: 275px;
+      }
+    }
+  }
+
+  &__status {
+    text-align: center;
+    font-size: 14px;
+    padding: 15px;
+  }
+
+  &__image {
+    font-size: 1.5rem;
+    font-weight: 500;
+    padding: 16px 0 0;
+    text-align: center;
+  }
+
+  &__error {
+    text-align: center;
+    font-size: 16px;
+    padding: 15px;
+  }
+
+  &__footer {
+    padding: 20px;
+    flex-direction: row;
+    display: flex;
+
+    button {
+      margin-right: 15px;
+    }
+
+    button:last-of-type {
+      margin-right: 0;
+      background-color: #009eec;
+      border: none;
+      color: #fff;
+    }
+  }
+
+  &__close::after {
+    content: '\00D7';
+    font-size: 35px;
+    color: #9b9b9b;
+    position: absolute;
+    top: 4px;
+    right: 20px;
+    cursor: pointer;
+    font-weight: 300;
+  }
+}
+
diff --git a/ui/app/components/modals/qr-scanner/qr-scanner.component.js b/ui/app/components/modals/qr-scanner/qr-scanner.component.js
new file mode 100644
index 000000000..cb8d07d83
--- /dev/null
+++ b/ui/app/components/modals/qr-scanner/qr-scanner.component.js
@@ -0,0 +1,216 @@
+import React, { Component } from 'react'
+import PropTypes from 'prop-types'
+import { BrowserQRCodeReader } from '@zxing/library'
+import adapter from 'webrtc-adapter' // eslint-disable-line import/no-nodejs-modules, no-unused-vars
+import Spinner from '../../spinner'
+import WebcamUtils from '../../../../lib/webcam-utils'
+import PageContainerFooter from '../../page-container/page-container-footer/page-container-footer.component'
+
+export default class QrScanner extends Component {
+  static propTypes = {
+    hideModal: PropTypes.func.isRequired,
+    qrCodeDetected: PropTypes.func,
+    scanQrCode: PropTypes.func,
+    error: PropTypes.bool,
+    errorType: PropTypes.string,
+  }
+
+  static contextTypes = {
+    t: PropTypes.func,
+  }
+
+  constructor (props, context) {
+    super(props)
+
+    this.state = {
+      ready: false,
+      msg: context.t('accessingYourCamera'),
+    }
+    this.codeReader = null
+    this.permissionChecker = null
+    this.needsToReinit = false
+
+    // Clear pre-existing qr code data before scanning
+    this.props.qrCodeDetected(null)
+  }
+
+  componentDidMount () {
+    this.initCamera()
+  }
+
+  async checkPermisisions () {
+    const { permissions } = await WebcamUtils.checkStatus()
+    if (permissions) {
+      clearTimeout(this.permissionChecker)
+      // Let the video stream load first...
+      setTimeout(_ => {
+        this.setState({
+          ready: true,
+          msg: this.context.t('scanInstructions'),
+        })
+        if (this.needsToReinit) {
+          this.initCamera()
+          this.needsToReinit = false
+        }
+      }, 2000)
+    } else {
+      // Keep checking for permissions
+      this.permissionChecker = setTimeout(_ => {
+        this.checkPermisisions()
+      }, 1000)
+    }
+  }
+
+  componentWillUnmount () {
+    clearTimeout(this.permissionChecker)
+    if (this.codeReader) {
+      this.codeReader.reset()
+    }
+  }
+
+  initCamera () {
+    this.codeReader = new BrowserQRCodeReader()
+    this.codeReader.getVideoInputDevices()
+      .then(videoInputDevices => {
+        clearTimeout(this.permissionChecker)
+        this.checkPermisisions()
+        this.codeReader.decodeFromInputVideoDevice(undefined, 'video')
+        .then(content => {
+          const result = this.parseContent(content.text)
+          if (result.type !== 'unknown') {
+            this.props.qrCodeDetected(result)
+            this.stopAndClose()
+          } else {
+            this.setState({msg: this.context.t('unknownQrCode')})
+          }
+        })
+        .catch(err => {
+          if (err && err.name === 'NotAllowedError') {
+            this.setState({msg: this.context.t('youNeedToAllowCameraAccess')})
+            clearTimeout(this.permissionChecker)
+            this.needsToReinit = true
+            this.checkPermisisions()
+          }
+        })
+      }).catch(err => {
+        console.error('[QR-SCANNER]: getVideoInputDevices threw an exception: ', err)
+      })
+  }
+
+  parseContent (content) {
+    let type = 'unknown'
+    let values = {}
+
+    // Here we could add more cases
+    // To parse other type of links
+    // For ex. EIP-681 (https://eips.ethereum.org/EIPS/eip-681)
+
+
+    // Ethereum address links - fox ex. ethereum:0x.....1111
+    if (content.split('ethereum:').length > 1) {
+
+      type = 'address'
+      values = {'address': content.split('ethereum:')[1] }
+
+    // Regular ethereum addresses - fox ex. 0x.....1111
+    } else if (content.substring(0, 2).toLowerCase() === '0x') {
+
+      type = 'address'
+      values = {'address': content }
+
+    }
+    return {type, values}
+  }
+
+
+  stopAndClose = () => {
+    if (this.codeReader) {
+      this.codeReader.reset()
+    }
+    this.setState({ ready: false })
+    this.props.hideModal()
+  }
+
+  tryAgain = () => {
+    // close the modal
+    this.stopAndClose()
+    // wait for the animation and try again
+    setTimeout(_ => {
+      this.props.scanQrCode()
+    }, 1000)
+  }
+
+  renderVideo () {
+    return (
+      <div className={'qr-scanner__content__video-wrapper'}>
+        <video
+          id="video"
+          style={{
+            display: this.state.ready ? 'block' : 'none',
+          }}
+        />
+        { !this.state.ready ? <Spinner color={'#F7C06C'} /> : null}
+      </div>
+    )
+  }
+
+  renderErrorModal () {
+    let title, msg
+
+    if (this.props.error) {
+      if (this.props.errorType === 'NO_WEBCAM_FOUND') {
+        title = this.context.t('noWebcamFoundTitle')
+        msg = this.context.t('noWebcamFound')
+      } else {
+        title = this.context.t('unknownCameraErrorTitle')
+        msg = this.context.t('unknownCameraError')
+      }
+    }
+
+    return (
+      <div className="qr-scanner">
+        <div className="qr-scanner__close" onClick={this.stopAndClose}></div>
+
+        <div className="qr-scanner__image">
+          <img src={'images/webcam.svg'} width={70} height={70} />
+        </div>
+        <div className="qr-scanner__title">
+          { title }
+        </div>
+        <div className={'qr-scanner__error'}>
+          {msg}
+        </div>
+        <PageContainerFooter
+          onCancel={this.stopAndClose}
+          onSubmit={this.tryAgain}
+          cancelText={this.context.t('cancel')}
+          submitText={this.context.t('tryAgain')}
+          submitButtonType="confirm"
+        />
+      </div>
+    )
+  }
+
+  render () {
+    const { t } = this.context
+
+    if (this.props.error) {
+      return this.renderErrorModal()
+    }
+
+    return (
+      <div className="qr-scanner">
+        <div className="qr-scanner__close" onClick={this.stopAndClose}></div>
+        <div className="qr-scanner__title">
+          { `${t('scanQrCode')}` }
+        </div>
+        <div className="qr-scanner__content">
+          { this.renderVideo() }
+        </div>
+        <div className={'qr-scanner__status'}>
+          {this.state.msg}
+        </div>
+      </div>
+    )
+  }
+}
diff --git a/ui/app/components/modals/qr-scanner/qr-scanner.container.js b/ui/app/components/modals/qr-scanner/qr-scanner.container.js
new file mode 100644
index 000000000..d0a35e03b
--- /dev/null
+++ b/ui/app/components/modals/qr-scanner/qr-scanner.container.js
@@ -0,0 +1,24 @@
+import { connect } from 'react-redux'
+import QrScanner from './qr-scanner.component'
+
+const { hideModal, qrCodeDetected, showQrScanner } = require('../../../actions')
+import {
+  SEND_ROUTE,
+} from '../../../routes'
+
+const mapStateToProps = state => {
+  return {
+    error: state.appState.modal.modalState.props.error,
+    errorType: state.appState.modal.modalState.props.errorType,
+  }
+}
+
+const mapDispatchToProps = dispatch => {
+  return {
+    hideModal: () => dispatch(hideModal()),
+    qrCodeDetected: (data) => dispatch(qrCodeDetected(data)),
+    scanQrCode: () => dispatch(showQrScanner(SEND_ROUTE)),
+  }
+}
+
+export default connect(mapStateToProps, mapDispatchToProps)(QrScanner)
diff --git a/ui/app/components/send/send-content/send-content.component.js b/ui/app/components/send/send-content/send-content.component.js
index 7a0b1a18e..df7bcb7cc 100644
--- a/ui/app/components/send/send-content/send-content.component.js
+++ b/ui/app/components/send/send-content/send-content.component.js
@@ -11,6 +11,7 @@ export default class SendContent extends Component {
 
   static propTypes = {
     updateGas: PropTypes.func,
+    scanQrCode: PropTypes.func,
   };
 
   render () {
@@ -18,7 +19,10 @@ export default class SendContent extends Component {
       <PageContainerContent>
         <div className="send-v2__form">
           <SendFromRow />
-          <SendToRow updateGas={(updateData) => this.props.updateGas(updateData)} />
+          <SendToRow
+            updateGas={(updateData) => this.props.updateGas(updateData)}
+            scanQrCode={ _ => this.props.scanQrCode()}
+          />
           <SendAmountRow updateGas={(updateData) => this.props.updateGas(updateData)} />
           <SendGasRow />
           <SendHexDataRow />
diff --git a/ui/app/components/send/send-content/send-to-row/send-to-row.component.js b/ui/app/components/send/send-content/send-to-row/send-to-row.component.js
index 892ad5d67..1163dcffc 100644
--- a/ui/app/components/send/send-content/send-to-row/send-to-row.component.js
+++ b/ui/app/components/send/send-content/send-to-row/send-to-row.component.js
@@ -17,6 +17,7 @@ export default class SendToRow extends Component {
     updateGas: PropTypes.func,
     updateSendTo: PropTypes.func,
     updateSendToError: PropTypes.func,
+    scanQrCode: PropTypes.func,
   };
 
   static contextTypes = {
@@ -51,6 +52,7 @@ export default class SendToRow extends Component {
         showError={inError}
       >
         <EnsInput
+          scanQrCode={_ => this.props.scanQrCode()}
           accounts={toAccounts}
           closeDropdown={() => closeToDropdown()}
           dropdownOpen={toDropdownOpen}
diff --git a/ui/app/components/send/send.component.js b/ui/app/components/send/send.component.js
index 6f1b20c55..0d8ffd179 100644
--- a/ui/app/components/send/send.component.js
+++ b/ui/app/components/send/send.component.js
@@ -38,12 +38,30 @@ export default class SendTransactionScreen extends PersistentForm {
     updateAndSetGasTotal: PropTypes.func,
     updateSendErrors: PropTypes.func,
     updateSendTokenBalance: PropTypes.func,
+    scanQrCode: PropTypes.func,
+    qrCodeDetected: PropTypes.func,
+    qrCodeData: PropTypes.object,
   };
 
   static contextTypes = {
     t: PropTypes.func,
   };
 
+  componentWillReceiveProps (nextProps) {
+    if (nextProps.qrCodeData) {
+      if (nextProps.qrCodeData.type === 'address') {
+        const scannedAddress = nextProps.qrCodeData.values.address.toLowerCase()
+        const currentAddress = this.props.to && this.props.to.toLowerCase()
+        if (currentAddress !== scannedAddress) {
+          this.props.updateSendTo(scannedAddress)
+          this.updateGas({ to: scannedAddress })
+          // Clean up QR code data after handling
+          this.props.qrCodeDetected(null)
+        }
+      }
+    }
+  }
+
   updateGas ({ to: updatedToAddress, amount: value } = {}) {
     const {
       amount,
@@ -158,6 +176,16 @@ export default class SendTransactionScreen extends PersistentForm {
       address,
     })
     this.updateGas()
+
+    // Show QR Scanner modal  if ?scan=true
+    if (window.location.search === '?scan=true') {
+      this.props.scanQrCode()
+
+      // Clear the queryString param after showing the modal
+      const cleanUrl = location.href.split('?')[0]
+      history.pushState({}, null, `${cleanUrl}`)
+      window.location.hash = '#send'
+    }
   }
 
   componentWillUnmount () {
@@ -170,7 +198,10 @@ export default class SendTransactionScreen extends PersistentForm {
     return (
       <div className="page-container">
         <SendHeader history={history}/>
-        <SendContent updateGas={(updateData) => this.updateGas(updateData)}/>
+        <SendContent
+          updateGas={(updateData) => this.updateGas(updateData)}
+          scanQrCode={_ => this.props.scanQrCode()}
+        />
         <SendFooter history={history}/>
       </div>
     )
diff --git a/ui/app/components/send/send.container.js b/ui/app/components/send/send.container.js
index 44ebd2792..41735de64 100644
--- a/ui/app/components/send/send.container.js
+++ b/ui/app/components/send/send.container.js
@@ -21,11 +21,15 @@ import {
   getSendFromObject,
   getSendTo,
   getTokenBalance,
+  getQrCodeData,
 } from './send.selectors'
 import {
+  updateSendTo,
   updateSendTokenBalance,
   updateGasData,
   setGasTotal,
+  showQrScanner,
+  qrCodeDetected,
 } from '../../actions'
 import {
   resetSendState,
@@ -35,6 +39,10 @@ import {
   calcGasTotal,
 } from './send.utils.js'
 
+import {
+  SEND_ROUTE,
+} from '../../routes'
+
 module.exports = compose(
   withRouter,
   connect(mapStateToProps, mapDispatchToProps)
@@ -60,6 +68,7 @@ function mapStateToProps (state) {
     tokenBalance: getTokenBalance(state),
     tokenContract: getSelectedTokenContract(state),
     tokenToFiatRate: getSelectedTokenToFiatRate(state),
+    qrCodeData: getQrCodeData(state),
   }
 }
 
@@ -89,5 +98,8 @@ function mapDispatchToProps (dispatch) {
     },
     updateSendErrors: newError => dispatch(updateSendErrors(newError)),
     resetSendState: () => dispatch(resetSendState()),
+    scanQrCode: () => dispatch(showQrScanner(SEND_ROUTE)),
+    qrCodeDetected: (data) => dispatch(qrCodeDetected(data)),
+    updateSendTo: (to, nickname) => dispatch(updateSendTo(to, nickname)),
   }
 }
diff --git a/ui/app/components/send/send.selectors.js b/ui/app/components/send/send.selectors.js
index cf07eafe1..ab3f6d34b 100644
--- a/ui/app/components/send/send.selectors.js
+++ b/ui/app/components/send/send.selectors.js
@@ -46,6 +46,7 @@ const selectors = {
   getTokenExchangeRate,
   getUnapprovedTxs,
   transactionsSelector,
+  getQrCodeData,
 }
 
 module.exports = selectors
@@ -282,3 +283,7 @@ function transactionsSelector (state) {
     : txsToRender
       .sort((a, b) => b.time - a.time)
 }
+
+function getQrCodeData (state) {
+  return state.appState.qrCodeData
+}
diff --git a/ui/app/components/send/tests/send-container.test.js b/ui/app/components/send/tests/send-container.test.js
index 7a9120d24..57e332780 100644
--- a/ui/app/components/send/tests/send-container.test.js
+++ b/ui/app/components/send/tests/send-container.test.js
@@ -44,6 +44,7 @@ proxyquire('../send.container.js', {
     getSendEditingTransactionId: (s) => `mockEditingTransactionId:${s}`,
     getSendFromObject: (s) => `mockFrom:${s}`,
     getTokenBalance: (s) => `mockTokenBalance:${s}`,
+    getQrCodeData: (s) => `mockQrCodeData:${s}`,
   },
   '../../actions': actionSpies,
   '../../ducks/send.duck': duckActionSpies,
@@ -76,6 +77,7 @@ describe('send container', () => {
         tokenBalance: 'mockTokenBalance:mockState',
         tokenContract: 'mockTokenContract:mockState',
         tokenToFiatRate: 'mockTokenToFiatRate:mockState',
+        qrCodeData: 'mockQrCodeData:mockState',
       })
     })
 
diff --git a/ui/app/components/send/to-autocomplete/to-autocomplete.js b/ui/app/components/send/to-autocomplete/to-autocomplete.js
index 80cfa7a85..49ebf49d9 100644
--- a/ui/app/components/send/to-autocomplete/to-autocomplete.js
+++ b/ui/app/components/send/to-autocomplete/to-autocomplete.js
@@ -4,6 +4,7 @@ const h = require('react-hyperscript')
 const inherits = require('util').inherits
 const AccountListItem = require('../account-list-item/account-list-item.component').default
 const connect = require('react-redux').connect
+const Tooltip = require('../../tooltip')
 
 ToAutoComplete.contextTypes = {
   t: PropTypes.func,
@@ -94,11 +95,12 @@ ToAutoComplete.prototype.render = function () {
     dropdownOpen,
     onChange,
     inError,
+    qrScanner,
   } = this.props
 
   return h('div.send-v2__to-autocomplete', {}, [
 
-    h('input.send-v2__to-autocomplete__input', {
+    h(`input.send-v2__to-autocomplete__input${qrScanner ? '.with-qr' : ''}`, {
       placeholder: this.context.t('recipientAddress'),
       className: inError ? `send-v2__error-border` : '',
       value: to,
@@ -108,7 +110,13 @@ ToAutoComplete.prototype.render = function () {
         borderColor: inError ? 'red' : null,
       },
     }),
-
+    qrScanner && h(Tooltip, {
+      title: this.context.t('scanQrCode'),
+      position: 'bottom',
+    }, h(`i.fa.fa-qrcode.fa-lg.send-v2__to-autocomplete__qr-code`, {
+      style: { color: '#33333' },
+      onClick: () => this.props.scanQrCode(),
+    })),
     !to && h(`i.fa.fa-caret-down.fa-lg.send-v2__to-autocomplete__down-caret`, {
       style: { color: '#dedede' },
       onClick: () => this.handleInputEvent(),