Explicitly define state in import account from json component (#3491)

1 files changed, 102 insertions, 78 deletions

diff --git a/ui/app/accounts/import/json.js b/ui/app/accounts/import/json.js
index dd5dfad22..c13622166 100644
--- a/ui/app/accounts/import/json.js
+++ b/ui/app/accounts/import/json.js
@@ -1,5 +1,5 @@
-const inherits = require('util').inherits
 const Component = require('react').Component
+const PropTypes = require('prop-types')
 const h = require('react-hyperscript')
 const connect = require('react-redux').connect
 const actions = require('../../actions')
@@ -7,100 +7,124 @@ const FileInput = require('react-simple-file-input').default
 
 const HELP_LINK = 'https://support.metamask.io/kb/article/7-importing-accounts'
 
-module.exports = connect(mapStateToProps)(JsonImportSubview)
+class JsonImportSubview extends Component {
+  constructor (props) {
+    super(props)
 
-function mapStateToProps (state) {
-  return {
-    error: state.appState.warning,
+    this.state = {
+      file: null,
+      fileContents: '',
+    }
   }
-}
 
-inherits(JsonImportSubview, Component)
-function JsonImportSubview () {
-  Component.call(this)
-}
+  render () {
+    const { error } = this.props
+
+    return (
+      h('div.new-account-import-form__json', [
+
+        h('p', 'Used by a variety of different clients'),
+        h('a.warning', {
+          href: HELP_LINK,
+          target: '_blank',
+        }, 'File import not working? Click here!'),
+
+        h(FileInput, {
+          readAs: 'text',
+          onLoad: this.onLoad.bind(this),
+          style: {
+            margin: '20px 0px 12px 34%',
+            fontSize: '15px',
+            display: 'flex',
+            justifyContent: 'center',
+          },
+        }),
+
+        h('input.new-account-import-form__input-password', {
+          type: 'password',
+          placeholder: 'Enter password',
+          id: 'json-password-box',
+          onKeyPress: this.createKeyringOnEnter.bind(this),
+        }),
+
+        h('div.new-account-create-form__buttons', {}, [
+
+          h('button.new-account-create-form__button-cancel', {
+            onClick: () => this.props.goHome(),
+          }, [
+            'CANCEL',
+          ]),
+
+          h('button.new-account-create-form__button-create', {
+            onClick: () => this.createNewKeychain(),
+          }, [
+            'IMPORT',
+          ]),
 
-JsonImportSubview.prototype.render = function () {
-  const { error } = this.props
-
-  return (
-    h('div.new-account-import-form__json', [
-
-      h('p', 'Used by a variety of different clients'),
-      h('a.warning', { href: HELP_LINK, target: '_blank' }, 'File import not working? Click here!'),
-
-      h(FileInput, {
-        readAs: 'text',
-        onLoad: this.onLoad.bind(this),
-        style: {
-          margin: '20px 0px 12px 34%',
-          fontSize: '15px',
-          display: 'flex',
-          justifyContent: 'center',
-        },
-      }),
-
-      h('input.new-account-import-form__input-password', {
-        type: 'password',
-        placeholder: 'Enter password',
-        id: 'json-password-box',
-        onKeyPress: this.createKeyringOnEnter.bind(this),
-      }),
-
-      h('div.new-account-create-form__buttons', {}, [
-
-        h('button.new-account-create-form__button-cancel', {
-          onClick: () => this.props.goHome(),
-        }, [
-          'CANCEL',
         ]),
 
-        h('button.new-account-create-form__button-create', {
-          onClick: () => this.createNewKeychain.bind(this),
-        }, [
-          'IMPORT',
-        ]),
+        error ? h('span.error', error) : null,
+      ])
+    )
+  }
 
-      ]),
+  onLoad (event, file) {
+    this.setState({file: file, fileContents: event.target.result})
+  }
 
-      error ? h('span.error', error) : null,
-    ])
-  )
-}
+  createKeyringOnEnter (event) {
+    if (event.key === 'Enter') {
+      event.preventDefault()
+      this.createNewKeychain()
+    }
+  }
 
-JsonImportSubview.prototype.onLoad = function (event, file) {
-  this.setState({file: file, fileContents: event.target.result})
-}
+  createNewKeychain () {
+    const state = this.state
 
-JsonImportSubview.prototype.createKeyringOnEnter = function (event) {
-  if (event.key === 'Enter') {
-    event.preventDefault()
-    this.createNewKeychain()
-  }
-}
+    if (!state) {
+      const message = 'You must select a valid file to import.'
+      return this.props.displayWarning(message)
+    }
 
-JsonImportSubview.prototype.createNewKeychain = function () {
-  const state = this.state
+    const { fileContents } = state
 
-  if (!state) {
-    const message = 'You must select a valid file to import.'
-    return this.props.dispatch(actions.displayWarning(message))
-  }
+    if (!fileContents) {
+      const message = 'You must select a file to import.'
+      return this.props.displayWarning(message)
+    }
+
+    const passwordInput = document.getElementById('json-password-box')
+    const password = passwordInput.value
 
-  const { fileContents } = state
+    if (!password) {
+      const message = 'You must enter a password for the selected file.'
+      return this.props.displayWarning(message)
+    }
 
-  if (!fileContents) {
-    const message = 'You must select a file to import.'
-    return this.props.dispatch(actions.displayWarning(message))
+    this.props.importNewJsonAccount([ fileContents, password ])
   }
+}
 
-  const passwordInput = document.getElementById('json-password-box')
-  const password = passwordInput.value
+JsonImportSubview.propTypes = {
+  error: PropTypes.string,
+  goHome: PropTypes.func,
+  displayWarning: PropTypes.func,
+  importNewJsonAccount: PropTypes.func,
+}
 
-  if (!password) {
-    const message = 'You must enter a password for the selected file.'
-    return this.props.dispatch(actions.displayWarning(message))
+const mapStateToProps = state => {
+  return {
+    error: state.appState.warning,
   }
+}
 
-  this.props.dispatch(actions.importNewAccount('JSON File', [ fileContents, password ]))
+const mapDispatchToProps = dispatch => {
+  return {
+    goHome: () => dispatch(actions.goHome()),
+    displayWarning: warning => dispatch(actions.displayWarning(warning)),
+    importNewJsonAccount: options => dispatch(actions.importNewAccount('JSON File', options)),
+  }
 }
+
+module.exports = connect(mapStateToProps, mapDispatchToProps)(JsonImportSubview)