Add email support for kapacitor alert config.

ui/src/kapacitor/components/RuleMessage.js

@@ -4,16 +4,18 @@ import ReactTooltip from 'react-tooltip';
 import _ from 'lodash';
 import {RULE_MESSAGE_TEMPLATES as templates} from '../constants/index.js';
 
-const DEFAULT_ALERTS = ['http', 'tcp', 'exec'];
+const DEFAULT_ALERTS = ['http', 'tcp', 'exec', 'smtp'];
 const DEFAULT_ALERT_PLACEHOLDERS = {
   http: 'URL',
   tcp: 'Address',
   exec: 'Add command with arguments separated by spaces',
+  smtp: 'Add email addresses separated by spaces',
 };
 const ALERT_NODES_ACCESSORS = {
   http: (rule) => _.get(rule, 'alertNodes[0].args[0]', ''),
   tcp: (rule) => _.get(rule, 'alertNodes[0].args[0]', ''),
   exec: (rule) => _.get(rule, 'alertNodes[0].args', []).join(' '),
+  smtp: (rule) => _.get(rule, 'alertNodes[0].args', []).join(' '),
 };
 
 const {

ui/src/kapacitor/reducers/rules.js

@@ -79,20 +79,10 @@ export default function rules(state = {}, action) {
 
       switch (alertType) {
         case 'http':
-          alertNodesByType = [
-            {
-              name: 'http',
-              args: [
-                alertNodesText,
-              ],
-              properties: [],
-            },
-          ];
-          break;
         case 'tcp':
           alertNodesByType = [
             {
-              name: 'tcp',
+              name: alertType,
               args: [
                 alertNodesText,
               ],
@@ -101,9 +91,10 @@ export default function rules(state = {}, action) {
           ];
           break;
         case 'exec':
+        case 'smtp':
           alertNodesByType = [
             {
-              name: 'exec',
+              name: alertType,
               args: alertNodesText.split(' '),
               properties: [],
             },