Extracted multi-graphite query function, fixed loadRecursive

The new function in metricKeys generalizes what my loadAll
from the previous commit did, it takes a request and a
callback. The request is executed on each graphite installation
and the callback is executed for each result. This makes
implementing loadAll and loadRecursive almost as simple as
it was.

src/app/controllers/metricKeys.js

@@ -52,18 +52,23 @@ function (angular, _, config) {
     $scope.loadAll = function() {
       $scope.infoText = "Fetching all metrics from graphite...";
 
-      return $q.all( _.map( config.datasources, function( datasource ) {
-          if ( datasource.type = 'graphite' ) {
-              return $http.get( datasource.url + "/metrics/index.json" )
-                    .then( saveMetricsArray );
-          } 
-      } ) ).then( function() {
+      getFromEachGraphite( '/metrics/index.json', saveMetricsArray )
+        .then( function() {
           $scope.infoText = "Indexing complete!";
-      }).then(null, function(err) {
+        }).then(null, function(err) {
           $scope.errorText = err;
-      });
+        });
     };
 
+    function getFromEachGraphite( request, data_callback, error_callback ) {
+      return $q.all( _.map( config.datasources, function( datasource ) {
+        if ( datasource.type = 'graphite' ) {
+          return $http.get( datasource.url + request )
+            .then( data_callback, error_callback );
+        } 
+      } ) );
+    }
+
     function saveMetricsArray(data, currentIndex)
     {
       if (!data && !data.data && data.data.length === 0) {
@@ -82,6 +87,7 @@ function (angular, _, config) {
         });
     }
 
+    
     function deleteIndex()
     {
       var deferred = $q.defer();
@@ -157,7 +163,6 @@ function (angular, _, config) {
     function saveMetricKey(metricId) {
 
       // Create request with id as title. Rethink this.
-      console.log( config.grafana_metrics_index, metricId );
       var request = $scope.ejs.Document(config.grafana_metrics_index, 'metricKey', metricId).source({
         metricPath: metricId
       });
@@ -175,7 +180,7 @@ function (angular, _, config) {
 
     function loadMetricsRecursive(metricPath)
     {
-      return $http.get(config.graphiteUrl + '/metrics/find/?query=' + metricPath).then(receiveMetric);
+      return getFromEachGraphite( '/metrics/find/?query=' + metricPath, receiveMetric );
     }
 
   });