Add email subscription form

browser/main/modals/PreferencesModal/InfoTab.js

@@ -16,7 +16,10 @@ class InfoTab extends React.Component {
     super(props)
 
     this.state = {
-      config: this.props.config
+      config: this.props.config,
+      subscriptionFormStatus: 'idle',
+      subscriptionFormErrorMessage: null,
+      subscriptionFormEmail: ''
     }
   }
 
@@ -31,6 +34,48 @@ class InfoTab extends React.Component {
     this.setState({ config: newConfig })
   }
 
+  handleSubscriptionFormSubmit(e) {
+    e.preventDefault()
+    this.setState({
+      subscriptionFormStatus: 'sending',
+      subscriptionFormErrorMessage: null
+    })
+
+    fetch(
+      'https://boostmails.boostio.co/api/public/lists/5f434dccd05f3160b41c0d49/subscriptions',
+      {
+        headers: {
+          Accept: 'application/json',
+          'Content-Type': 'application/json'
+        },
+        method: 'POST',
+        body: JSON.stringify({ email: this.state.subscriptionFormEmail })
+      }
+    )
+      .then(response => {
+        if (response.status >= 400) {
+          return response.text().then(text => {
+            throw new Error(text)
+          })
+        }
+        this.setState({
+          subscriptionFormStatus: 'done'
+        })
+      })
+      .catch(error => {
+        this.setState({
+          subscriptionFormStatus: 'idle',
+          subscriptionFormErrorMessage: error.message
+        })
+      })
+  }
+
+  handleSubscriptionFormEmailChange(e) {
+    this.setState({
+      subscriptionFormEmail: e.target.value
+    })
+  }
+
   handleSaveButtonClick(e) {
     const newConfig = {
       amaEnabled: this.state.config.amaEnabled
@@ -134,6 +179,40 @@ class InfoTab extends React.Component {
 
         <hr />
 
+        <div styleName='group-header--sub'>Subscribe Update Notes</div>
+        {this.state.subscriptionFormStatus === 'done' ? (
+          <div>
+            <blockquote color={{ color: 'green' }}>
+              Thanks for the subscription!
+            </blockquote>
+          </div>
+        ) : (
+          <div>
+            {this.state.subscriptionFormErrorMessage != null && (
+              <blockquote style={{ color: 'red' }}>
+                {this.state.subscriptionFormErrorMessage}
+              </blockquote>
+            )}
+            <form onSubmit={e => this.handleSubscriptionFormSubmit(e)}>
+              <input
+                styleName='subscription-email-input'
+                placeholder='E-mail'
+                type='email'
+                onChange={e => this.handleSubscriptionFormEmailChange(e)}
+                disabled={this.state.subscriptionFormStatus === 'sending'}
+              />
+              <button
+                styleName='subscription-submit-button'
+                type='submit'
+                disabled={this.state.subscriptionFormStatus === 'sending'}
+              >
+                Subscribe
+              </button>
+            </form>
+          </div>
+        )}
+        <hr />
+
         <div styleName='group-header--sub'>{i18n.__('About')}</div>
 
         <div styleName='top'>

browser/main/modals/PreferencesModal/InfoTab.styl

@@ -33,6 +33,35 @@
 .separate-line
   margin 40px 0
 
+.subscription-email-input
+  height 35px
+  vertical-align middle
+  width 200px
+  font-size $tab--button-font-size
+  border solid 1px $border-color
+  border-radius 2px
+  padding 0 5px
+  margin-right 5px
+  outline none
+  &:disabled
+    background-color $ui-input--disabled-backgroundColor
+
+.subscription-submit-button
+  margin-top 10px
+  height 35px
+  border-radius 2px
+  border none
+  background-color alpha(#1EC38B, 90%)
+  padding-left 20px
+  padding-right 20px
+  text-decoration none
+  color white
+  font-weight 600
+  font-size 16px
+  &:hover
+    background-color #1EC38B
+    transition 0.2s
+
 .policy-submit
   margin-top 10px
   height 35px