3 files changed, 111 insertions, 30 deletions
diff --git a/web-ui/src/backup_account/page.js b/web-ui/src/backup_account/page.js
index cc93a560..c7554cfb 100644
--- a/web-ui/src/backup_account/page.js
+++ b/web-ui/src/backup_account/page.js
@@ -22,40 +22,65 @@ import SubmitButton from 'src/common/submit_button/submit_button';
 import InputField from 'src/common/input_field/input_field';
 import Footer from 'src/common/footer/footer';
 import Header from 'src/common/header/header';
+import validator from 'validator';
 
 import 'font-awesome/scss/font-awesome.scss';
 import './page.scss';
 
-export const Page = ({ t }) => (
-  <DocumentTitle title={t('backup-account.page-title')}>
-    <div className='page'>
-      <Header />
-      <section>
-        <div className='container'>
-          <img
-            className='backup-account-image'
-            src='/public/images/forgot-my-password.svg'
-            alt={t('backup-account.image-description')}
-          />
-          <form>
-            <h1>{t('backup-account.title')}</h1>
-            <p>{t('backup-account.paragraph1')}</p>
-            <p>{t('backup-account.paragraph2')}</p>
-            <InputField name='email' label={t('backup-account.input-label')} />
-            <SubmitButton buttonText={t('backup-account.button')} />
-            <div>
-              <a href='/' className='link'>
-                <i className='fa fa-angle-left' aria-hidden='true' />
-                <span>{t('back-to-inbox')}</span>
-              </a>
+
+export class Page extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = { error: '', submitButtonDisabled: true };
+    this.validateEmail = this.validateEmail.bind(this);
+  }
+
+  validateEmail(event) {
+    const validEmail = validator.isEmail(event.target.value);
+    const emptyEmail = validator.isEmpty(event.target.value);
+    const t = this.props.t;
+    this.setState({
+      error: !emptyEmail && !validEmail ? t('backup-account.error.invalid-email') : '',
+      submitButtonDisabled: !validEmail || emptyEmail
+    });
+  }
+
+  render() {
+    const t = this.props.t;
+    return (
+      <DocumentTitle title={t('backup-account.page-title')}>
+        <div className='page'>
+          <Header />
+          <section>
+            <div className='container'>
+              <img
+                className='backup-account-image'
+                src='/public/images/forgot-my-password.svg'
+                alt={t('backup-account.image-description')}
+              />
+              <form>
+                <h1>{t('backup-account.title')}</h1>
+                <p>{t('backup-account.paragraph1')}</p>
+                <p>{t('backup-account.paragraph2')}</p>
+                <InputField name='email' label={t('backup-account.input-label')} errorText={this.state.error} onChange={this.validateEmail} />
+                <SubmitButton buttonText={t('backup-account.button')} disabled={this.state.submitButtonDisabled} />
+                <div className='link-content'>
+                  <a href='/' className='link'>
+                    <i className='fa fa-angle-left' aria-hidden='true' />
+                    <span>{t('back-to-inbox')}</span>
+                  </a>
+                </div>
+              </form>
             </div>
-          </form>
+          </section>
+          <Footer />
         </div>
-      </section>
-      <Footer />
-    </div>
-  </DocumentTitle>
-);
+      </DocumentTitle>
+    );
+  }
+}
+
 
 Page.propTypes = {
   t: React.PropTypes.func.isRequired
diff --git a/web-ui/src/backup_account/page.scss b/web-ui/src/backup_account/page.scss
index 9d94c156..aa973fcd 100644
--- a/web-ui/src/backup_account/page.scss
+++ b/web-ui/src/backup_account/page.scss
@@ -101,7 +101,7 @@ p {
     display: flex;
     flex-direction: column;
 
-    div {
+    .input-field-group, .submit-button, .link-content {
       width: 70%;
       align-self: center;
     }
@@ -119,8 +119,9 @@ p {
 
   form {
     margin-left: 2.5em;
+    min-height: 492px;
 
-    div {
+    .input-field-group, .submit-button, .link-content {
       width: 300px;
       align-self: flex-start;
     }
diff --git a/web-ui/src/backup_account/page.spec.js b/web-ui/src/backup_account/page.spec.js
index ece61336..334d3ba8 100644
--- a/web-ui/src/backup_account/page.spec.js
+++ b/web-ui/src/backup_account/page.spec.js
@@ -22,4 +22,59 @@ describe('BackupAccount', () => {
   it('renders backup account submit button', () => {
     expect(page.find('SubmitButton').props().buttonText).toEqual('backup-account.button');
   });
+
+  describe('Email validation', () => {
+    let pageInstance;
+
+    beforeEach(() => {
+      pageInstance = page.instance();
+    });
+
+    it('verify initial state', () => {
+      expect(pageInstance.state.error).toEqual('');
+      expect(page.find('SubmitButton').props().disabled).toEqual(true);
+    });
+
+    context('with invalid email', () => {
+      beforeEach(() => {
+        pageInstance.validateEmail({ target: { value: 'test' } });
+      });
+
+      it('sets error in state', () => {
+        expect(pageInstance.state.error).toEqual('backup-account.error.invalid-email');
+      });
+
+      it('disables submit button', () => {
+        expect(page.find('SubmitButton').props().disabled).toEqual(true);
+      });
+    });
+
+    context('with valid email', () => {
+      beforeEach(() => {
+        pageInstance.validateEmail({ target: { value: 'test@test.com' } });
+      });
+
+      it('does not set error in state', () => {
+        expect(pageInstance.state.error).toEqual('');
+      });
+
+      it('submit button is enabled', () => {
+        expect(page.find('SubmitButton').props().disabled).toEqual(false);
+      });
+    });
+
+    context('with empty email', () => {
+      beforeEach(() => {
+        pageInstance.validateEmail({ target: { value: '' } });
+      });
+
+      it('not set error in state', () => {
+        expect(pageInstance.state.error).toEqual('');
+      });
+
+      it('disables submit button', () => {
+        expect(page.find('SubmitButton').props().disabled).toEqual(true);
+      });
+    });
+  });
 });