convert some React fields to ES6

- renamed empty label to placeholder

assets/js/src/form/fields/date.jsx

@@ -10,9 +10,9 @@ define([
       const yearsRange = 100;
       const years = [];
 
-      if (this.props.empty_value_label !== undefined) {
+      if (this.props.placeholder !== undefined) {
         years.push((
-          <option value="" key={ 0 }>{ this.props.empty_value_label }</option>
+          <option value="" key={ 0 }>{ this.props.placeholder }</option>
         ));
       }
 
@@ -41,9 +41,9 @@ define([
     render() {
       const months = [];
 
-      if (this.props.empty_value_label !== undefined) {
+      if (this.props.placeholder !== undefined) {
         months.push((
-          <option value="" key={ 0 }>{ this.props.empty_value_label }</option>
+          <option value="" key={ 0 }>{ this.props.placeholder }</option>
         ));
       }
 
@@ -71,9 +71,9 @@ define([
     render() {
       const days = [];
 
-      if (this.props.empty_value_label !== undefined) {
+      if (this.props.placeholder !== undefined) {
         days.push((
-          <option value="" key={ 0 }>{ this.props.empty_value_label }</option>
+          <option value="" key={ 0 }>{ this.props.placeholder }</option>
         ));
       }
 
@@ -178,7 +178,7 @@ define([
               key={ 'year' }
               name={ this.props.field.name }
               year={ this.state.year }
-              empty_value_label={ this.props.field.empty_year_label }
+              placeholder={ this.props.field.year_placeholder }
             />);
           break;
 
@@ -190,7 +190,7 @@ define([
               name={ this.props.field.name }
               month={ this.state.month }
               monthNames={ monthNames }
-              empty_value_label={ this.props.field.empty_month_label }
+              placeholder={ this.props.field.month_placeholder }
             />);
           break;
 
@@ -201,7 +201,7 @@ define([
               key={ 'day' }
               name={ this.props.field.name }
               day={ this.state.day }
-              empty_value_label={ this.props.field.empty_day_label }
+              placeholder={ this.props.field.day_placeholder }
             />);
           break;
         }

assets/js/src/form/fields/select.jsx

@@ -1,22 +1,17 @@
-define([
-  'react'
-],
-function(
-  React
-) {
+import React from 'react'
+
 const FormFieldSelect = React.createClass({
-    render: function() {
+  render() {
     if (this.props.field.values === undefined) {
       return false;
     }
 
-      let values = this.props.field.values;
     let filter = false;
-      let empty_option = false;
+    let placeholder = false;
 
-      if (this.props.field.empty_value_label !== undefined) {
-        empty_option = (
-          <option value="">{ this.props.field.empty_value_label }</option>
+    if (this.props.field.placeholder !== undefined) {
+      placeholder = (
+        <option value="">{ this.props.field.placeholder }</option>
       );
     }
 
@@ -24,7 +19,7 @@ function(
       filter = this.props.field.filter;
     }
 
-      const options = Object.keys(values).map(
+    const options = Object.keys(this.props.field.values).map(
       (value, index) => {
 
         if (filter !== false && filter(this.props.item, value) === false) {
@@ -49,12 +44,11 @@ function(
         onChange={ this.props.onValueChange }
         {...this.props.field.validation}
       >
-          {empty_option}
+        {placeholder}
         {options}
       </select>
     );
   }
 });
 
-  return FormFieldSelect;
-});
+module.exports = FormFieldSelect;

assets/js/src/form/fields/text.jsx

@@ -1,11 +1,7 @@
-define([
-  'react'
-],
-function(
-  React
-) {
+import React from 'react'
+
 const FormFieldText = React.createClass({
-    render: function() {
+  render() {
     let value = this.props.item[this.props.field.name];
     if (value === undefined) {
       value = this.props.field.defaultValue || '';
@@ -36,5 +32,4 @@ function(
   }
 });
 
-  return FormFieldText;
-});
+module.exports = FormFieldText;

assets/js/src/subscribers/form.jsx

@@ -117,16 +117,16 @@ define(
         field.values = custom_field.params.values;
       }
 
-      // add empty values' label for selects (date, select)
+      // add placeholders for selects (date, select)
       switch(custom_field.type) {
         case 'date':
-          field.empty_year_label = MailPoet.I18n.t('year');
-          field.empty_month_label = MailPoet.I18n.t('month');
-          field.empty_day_label = MailPoet.I18n.t('day');
+          field.year_placeholder = MailPoet.I18n.t('year');
+          field.month_placeholder = MailPoet.I18n.t('month');
+          field.day_placeholder = MailPoet.I18n.t('day');
         break;
 
         case 'select':
-          field.empty_value_label = '-';
+          field.placeholder = '-';
         break;
       }