typescript: stricter typescript option

public/app/features/alerting/alert_def.ts

@@ -106,6 +106,8 @@ function getStateDisplayModel(state) {
       };
     }
   }
+
+  throw {message: 'Unknown alert state'};
 }
 
 function joinEvalMatches(matches, separator: string) {

public/app/features/alerting/alert_tab_ctrl.ts

@@ -84,7 +84,7 @@ export class AlertTabCtrl {
     });
   }
 
-  getNotificationIcon(type) {
+  getNotificationIcon(type): string {
     switch (type) {
       case "email": return "fa fa-envelope";
       case "slack": return "fa fa-slack";
@@ -95,6 +95,7 @@ export class AlertTabCtrl {
       case "hipchat": return "fa fa-mail-forward";
       case "pushover": return "fa fa-mobile";
     }
+    return 'fa fa-bell';
   }
 
   getNotifications() {

public/app/features/panel/query_troubleshooter.ts

@@ -69,10 +69,11 @@ export class QueryTroubleshooterCtrl {
     }
   }
 
-  getClipboardText() {
+  getClipboardText(): string {
     if (this.jsonExplorer) {
       return JSON.stringify(this.jsonExplorer.json, null, 2);
     }
+    return '';
   }
 
   onRequestResponse(data) {

public/app/features/plugins/import_list/import_list.ts

@@ -38,6 +38,8 @@ export class DashImportListCtrl {
             });
           }, 500);
         });
+      } else {
+        return Promise.resolve();
       }
     });
   }

public/app/features/plugins/plugin_edit_ctrl.ts

@@ -79,6 +79,7 @@ export class PluginEditCtrl {
       case 'app':  return 'icon-gf icon-gf-apps';
       case 'page':  return 'icon-gf icon-gf-endpoint-tiny';
       case 'dashboard':  return 'icon-gf icon-gf-dashboard';
+      default: return 'icon-gf icon-gf-apps';
     }
   }
 

public/app/features/templating/editor_ctrl.ts

@@ -54,7 +54,7 @@ export class VariableEditorCtrl {
 
     $scope.isValid = function() {
       if (!$scope.ctrl.form.$valid) {
-        return;
+        return false;
       }
 
       if (!$scope.current.name.match(/^\w+$/)) {

public/app/plugins/datasource/influxdb/query_ctrl.ts

@@ -352,12 +352,13 @@ export class InfluxQueryCtrl extends QueryCtrl {
     this.panelCtrl.refresh();
   }
 
-  getTagValueOperator(tagValue, tagOperator) {
+  getTagValueOperator(tagValue, tagOperator): string {
     if (tagOperator !== '=~' && tagOperator !== '!~' && /^\/.*\/$/.test(tagValue)) {
       return '=~';
     } else if ((tagOperator === '=~' || tagOperator === '!~') && /^(?!\/.*\/$)/.test(tagValue)) {
       return '=';
     }
+    return null;
   }
 
   getCollapsedText() {

public/app/plugins/panel/graph/data_processor.ts

@@ -142,6 +142,7 @@ export class DataProcessor {
     let fields = [];
     var firstItem = dataList[0];
     let fieldParts = [];
+
     function getPropertiesRecursive(obj) {
       _.forEach(obj, (value, key) => {
         if (_.isObject(value)) {
@@ -156,20 +157,19 @@ export class DataProcessor {
       });
       fieldParts.pop();
     }
+
     if (firstItem.type === 'docs') {
       if (firstItem.datapoints.length === 0) {
         return [];
       }
       getPropertiesRecursive(firstItem.datapoints[0]);
-      return fields;
     }
+
+    return fields;
   }
 
   getXAxisValueOptions(options) {
     switch (this.panel.xaxis.mode) {
-      case 'time': {
-        return [];
-      }
       case 'series': {
         return [
           {text: 'Avg', value: 'avg'},
@@ -180,6 +180,8 @@ export class DataProcessor {
         ];
       }
     }
+
+    return [];
   }
 
   pluckDeep(obj: any, property: string) {

public/app/plugins/panel/graph/graph.ts

@@ -120,6 +120,8 @@ coreModule.directive('grafanaGraph', function($rootScope, timeSrv, popoverSrv) {
         if (panelWidth === 0) {
           return true;
         }
+
+        return false;
       }
 
       function drawHook(plot) {
@@ -385,6 +387,7 @@ coreModule.directive('grafanaGraph', function($rootScope, timeSrv, popoverSrv) {
         if (legendSideLastValue !== null && panel.legend.rightSide !== legendSideLastValue) {
           return true;
         }
+        return false;
       }
 
       function addTimeAxis(options) {

public/app/plugins/panel/heatmap/heatmap_data_converter.ts

@@ -21,7 +21,7 @@ function elasticHistogramToHeatmap(seriesList) {
   for (let series of seriesList) {
     let bound = Number(series.alias);
     if (isNaN(bound)) {
-      return;
+      return heatmap;
     }
 
     for (let point of series.datapoints) {
@@ -396,6 +396,8 @@ function isHeatmapDataEqual(objA: any, objB: any): boolean {
             is_eql = _.isEqual(_.sortBy(yBucket.values), _.sortBy(objB[x].buckets[y].values));
             if (!is_eql) {
               return false;
+            } else {
+              return true;
             }
           } else {
             is_eql = false;
@@ -409,6 +411,8 @@ function isHeatmapDataEqual(objA: any, objB: any): boolean {
 
       if (!is_eql) {
         return false;
+      } else {
+        return true;
       }
     } else {
       is_eql = false;

public/app/plugins/panel/table/transformers.ts

@@ -137,6 +137,7 @@ transformers['table'] = {
     if (!data || data.length === 0) {
       return [];
     }
+    return data[0].columns;
   },
   transform: function(data, panel, model) {
     if (!data || data.length === 0) {

tsconfig.json

@@ -12,7 +12,7 @@
         "noEmitOnError": false,
         "emitDecoratorMetadata": false,
         "experimentalDecorators": false,
-        "noImplicitReturns": false,
+        "noImplicitReturns": true,
         "noImplicitThis": false,
         "noImplicitUseStrict":false,
         "moduleResolution": "classic"
@@ -26,5 +26,4 @@
         "public/vendor/**/*",
         "public/**/*.d.ts"
     ]
-
 }