adds basic support for moving avg in es queries

public/app/plugins/datasource/elasticsearch/metric_agg.js

@@ -78,6 +78,23 @@ function (angular, _, queryDef) {
       return $scope.getFields({$fieldType: 'number'});
     };
 
+    $scope.getMetrics = function() {
+      console.log($scope.target.metrics);
+
+      var mets = _.filter($scope.target.metrics, function(x) {
+        return x.type !== 'moving_avg';
+      });
+
+      mets = _.map(mets, function(m) {
+        return { text: m.type, type: m.id };
+      });
+
+      console.log(mets);
+
+      return $q.when(mets)
+        .then(uiSegmentSrv.transformToSegments(false));
+    };
+
     $scope.addMetricAgg = function() {
       var addIndex = metricAggs.length;
 

public/app/plugins/datasource/elasticsearch/partials/metricAgg.html

@@ -7,7 +7,10 @@
 			<metric-segment-model property="agg.type" options="metricAggTypes" on-change="onTypeChange()" custom="false" css-class="tight-form-item-large"></metric-segment-model>
 		</li>
 		<li ng-if="aggDef.requiresField">
-			<metric-segment-model property="agg.field" get-options="getFieldsInternal()" on-change="onChange()" css-class="tight-form-item-xxlarge"></metric-segment>
+			<metric-segment-model property="agg.field" get-options="getFieldsInternal()" on-change="onChange()" css-class="tight-form-item-xxlarge"></metric-segment-model>
+		</li>
+		<li ng-if="aggDef.requiresBucketsPath">
+			<metric-segment-model property="agg.field" get-options="getMetrics()" on-change="onChange()" css-class="tight-form-item-xxlarge"></metric-segment-model>
 		</li>
 		<li class="tight-form-item last" ng-if="settingsLinkText">
 			<a ng-click="toggleOptions()">{{settingsLinkText}}</a>

public/app/plugins/datasource/elasticsearch/query_def.js

@@ -13,6 +13,7 @@ function (_) {
       {text: "Min",  value: 'min', requiresField: true},
       {text: "Extended Stats",  value: 'extended_stats', requiresField: true},
       {text: "Percentiles",  value: 'percentiles', requiresField: true},
+      {text: "Moving Avg",  value: 'moving_avg', requiresField: false, requiresBucketsPath: true},
       {text: "Unique Count", value: "cardinality", requiresField: true},
       {text: "Raw Document", value: "raw_document", requiresField: false}
     ],