5 files changed, 176 insertions, 5 deletions

diff --git a/ui/app/components/qr-scanner/index.js b/ui/app/components/qr-scanner/index.js
new file mode 100644
index 000000000..f459f6702
--- /dev/null
+++ b/ui/app/components/qr-scanner/index.js
@@ -0,0 +1,2 @@
+import QrScanner from './qr-scanner.component'
+module.exports = QrScanner
diff --git a/ui/app/components/qr-scanner/qr-scanner.component.js b/ui/app/components/qr-scanner/qr-scanner.component.js
new file mode 100644
index 000000000..cc07e53a2
--- /dev/null
+++ b/ui/app/components/qr-scanner/qr-scanner.component.js
@@ -0,0 +1,152 @@
+import React, { Component } from 'react'
+import PropTypes from 'prop-types'
+import {connect} from 'react-redux'
+import { hideQrScanner, qrCodeDetected} from '../../actions'
+import Instascan from 'instascan'
+
+class QrScanner extends Component {
+  static propTypes = {
+    visible: PropTypes.bool,
+    hideQrScanner: PropTypes.func,
+    qrCodeDetected: PropTypes.func,
+  }
+  constructor (props) {
+    super(props)
+    this.state = {
+      msg: 'Place the QR code in front of your camera so we can read it...',
+    }
+    this.scanning = false
+  }
+
+  parseContent (content) {
+    let type = 'unknown'
+    let values = {}
+
+    // Here we could add more cases
+    // To parse other codes (transactions for ex.)
+
+    if (content.split('ethereum:').length > 1) {
+      type = 'address'
+      values = {'address': content.split('ethereum:')[1] }
+    }
+    return {type, values}
+  }
+
+  componentDidUpdate () {
+    if (this.props.visible && this.camera && !this.scanning) {
+      const scanner = new Instascan.Scanner({
+        video: this.camera,
+        backgroundScan: false,
+        continuous: true,
+      })
+      scanner.addListener('scan', (content) => {
+        scanner.stop().then(_ => {
+          const result = this.parseContent(content)
+          if (result.type !== 'unknown') {
+            console.log('QR-SCANNER: CODE DETECTED', result)
+            this.props.qrCodeDetected(result)
+            this.props.hideQrScanner()
+          } else {
+            this.setState({msg: 'Error: We couldn\'t identify that QR code'})
+          }
+        })
+      })
+      Instascan.Camera.getCameras().then((cameras) => {
+        if (cameras.length > 0) {
+          scanner.start(cameras[0])
+          console.log('QR-SCANNER: started scanning with camera', cameras[0])
+        } else {
+          console.log('QR-SCANNER: no cameras found')
+        }
+      }).catch(function (e) {
+        console.error(e)
+      })
+      this.scanning = true
+    }
+  }
+
+  render () {
+    const { visible } = this.props
+
+    if (!visible) {
+     return null
+    }
+
+    return (
+      <div className={'qr-code-modal-wrapper'}>
+        <div className={'qr-scanner'}
+          style={{
+            position: 'fixed',
+            top: '50%',
+            left: '50%',
+            zIndex: 1050,
+            minWidth: '320px',
+            minHeight: '400px',
+            maxWidth: '300px',
+            maxHeight: '300px',
+            transform: 'translate(-50%, -50%)',
+            backgroundColor: '#ffffff',
+            padding: '15px',
+          }}
+        >
+          <h3 style={{
+            textAlign: 'center',
+            marginBottom: '20px',
+          }}>
+            Scan QR code
+          </h3>
+            <div
+              className={'qr-code-video-wrapper'}
+              style={{
+                overflow: 'hidden',
+                width: '100%',
+                height: '275px',
+              }}>
+              <video
+                style={{
+                  width: 'auto',
+                  height: '275px',
+                  marginLeft: '-15%',
+                }}
+                ref={(cam) => {
+                  this.camera = cam
+                }}
+              />
+            </div>
+          <div className={'qr-code-help'} style={{textAlign: 'center', fontSize: '12px', padding: '15px'}}>
+            {this.state.msg}
+          </div>
+        </div>
+        <div
+          className={'qr-code-modal-overlay'}
+          style={{
+            position: 'fixed',
+            top: '0',
+            right: '0',
+            bottom: '0',
+            left: '0',
+            zIndex: '1040',
+            backgroundColor: 'rgba(0, 0, 0, 0.5)',
+            animationFillMode: 'forwards',
+            animationDuration: '0.3s',
+            animationName: 'anim_171532470906313',
+            animationTimingFunction: 'ease-out',
+          }}
+          onClick={_ => this.props.hideQrScanner() }
+        />
+      </div>
+    )
+  }
+}
+
+function mapDispatchToProps (dispatch) {
+  return {
+    hideQrScanner: () => dispatch(hideQrScanner()),
+    qrCodeDetected: (data) => dispatch(qrCodeDetected(data)),
+  }
+}
+function mapStateToProps (state) {
+  return {}
+}
+
+export default connect(mapStateToProps, mapDispatchToProps)(QrScanner)
diff --git a/ui/app/components/send/send.component.js b/ui/app/components/send/send.component.js
index 6c439cd21..fb7eef329 100644
--- a/ui/app/components/send/send.component.js
+++ b/ui/app/components/send/send.component.js
@@ -39,16 +39,26 @@ export default class SendTransactionScreen extends PersistentForm {
     updateSendErrors: PropTypes.func,
     updateSendTokenBalance: PropTypes.func,
     scanQrCode: PropTypes.func,
+    qrCodeData: PropTypes.object,
   };
 
   static contextTypes = {
     t: PropTypes.func,
   };
 
-  scanQrCode = async () => {
-    const scannedAddress = await this.props.scanQrCode()
-    this.props.updateSendTo(scannedAddress)
-    this.updateGas({ to: scannedAddress })
+  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 })
+
+          // Here we should clear props.qrCodeData
+        }
+      }
+    }
   }
 
   updateGas ({ to: updatedToAddress, amount: value } = {}) {
@@ -179,7 +189,7 @@ export default class SendTransactionScreen extends PersistentForm {
         <SendHeader history={history}/>
         <SendContent
           updateGas={(updateData) => this.updateGas(updateData)}
-          scanQrCode={_ => this.scanQrCode()}
+          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 417941601..67a441a9d 100644
--- a/ui/app/components/send/send.container.js
+++ b/ui/app/components/send/send.container.js
@@ -21,6 +21,7 @@ import {
   getSendFromObject,
   getSendTo,
   getTokenBalance,
+  getQrCodeData,
 } from './send.selectors'
 import {
   updateSendTo,
@@ -62,6 +63,7 @@ function mapStateToProps (state) {
     tokenBalance: getTokenBalance(state),
     tokenContract: getSelectedTokenContract(state),
     tokenToFiatRate: getSelectedTokenToFiatRate(state),
+    qrCodeData: getQrCodeData(state),
   }
 }
 
diff --git a/ui/app/components/send/send.selectors.js b/ui/app/components/send/send.selectors.js
index cf07eafe1..4e81d1f9e 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
+}
\ No newline at end of file