Refactoring

@@ -20,7 +20,15 @@
 import { Inject, Injectable, NgZone } from '@angular/core';
 import { WINDOW } from '@core/services/window.service';
 import { ExceptionData } from '@app/shared/models/error.models';
-import { deepClone, deleteNullProperties, guid, isDefined, isDefinedAndNotNull, isUndefined, createLabelFromDatasource } from '@core/utils';
+import {
+  createLabelFromDatasource,
+  deepClone,
+  deleteNullProperties,
+  guid,
+  isDefined,
+  isDefinedAndNotNull,
+  isUndefined
+} from '@core/utils';
 import { WindowMessage } from '@shared/models/window-message.model';
 import { TranslateService } from '@ngx-translate/core';
 import { customTranslationsPrefix } from '@app/shared/models/constants';
@@ -34,8 +42,6 @@ import jsonSchemaDefaults from 'json-schema-defaults';
 import materialIconsCodepoints from '!raw-loader!material-design-icons/iconfont/codepoints';
 import { Observable, of, ReplaySubject } from 'rxjs';
 
-const varsRegex = /\$\{([^}]*)\}/g;
-
 const predefinedFunctions: { [func: string]: string } = {
   Sin: 'return Math.round(1000*Math.sin(time/5000));',
   Cos: 'return Math.round(1000*Math.cos(time/5000));',
@@ -215,7 +221,7 @@ export class UtilsService {
   }
 
   public customTranslation(translationValue: string, defaultValue: string): string {
-    let result = '';
+    let result: string;
     const translationId = customTranslationsPrefix + translationValue;
     const translation = this.translate.instant(translationId);
     if (translation !== translationId) {
@@ -226,20 +232,6 @@ export class UtilsService {
     return result;
   }
 
-  public insertVariable(pattern: string, name: string, value: any): string {
-    let result = deepClone(pattern);
-    let match = varsRegex.exec(pattern);
-    while (match !== null) {
-      const variable = match[0];
-      const variableName = match[1];
-      if (variableName === name) {
-        result = result.split(variable).join(value);
-      }
-      match = varsRegex.exec(pattern);
-    }
-    return result;
-  }
-
   public guid(): string {
     return guid();
   }
@@ -353,10 +345,6 @@ export class UtilsService {
     return additionalDataKey;
   }
 
-  public createLabelFromDatasource(datasource: Datasource, pattern: string) {
-    return createLabelFromDatasource(datasource, pattern);
-  }
-
   public generateColors(datasources: Array<Datasource>) {
     let index = 0;
     datasources.forEach((datasource) => {

@@ -20,6 +20,8 @@ import { finalize, share } from 'rxjs/operators';
 import base64js from 'base64-js';
 import { Datasource } from '@app/shared/models/widget.models';
 
+const varsRegex = /\${([^}]*)}/g;
+
 export function onParentScrollOrWindowResize(el: Node): Observable<Event> {
   const scrollSubject = new Subject<Event>();
   const scrollParentNodes = scrollParents(el);
@@ -103,6 +105,15 @@ export function isString(value: any): boolean {
   return typeof value === 'string';
 }
 
+export function isEmpty(obj: any): boolean {
+  for (const key of Object.keys(obj)) {
+    if (Object.prototype.hasOwnProperty.call(obj, key)) {
+      return false;
+    }
+  }
+  return true;
+}
+
 export function formatValue(value: any, dec?: number, units?: string, showZeroDecimals?: boolean): string | undefined {
   if (isDefined(value) &&
     value !== null && isNumeric(value)) {
@@ -435,8 +446,21 @@ export function getDescendantProp(obj: any, path: string): any {
   return path.split('.').reduce((acc, part) => acc && acc[part], obj);
 }
 
+export function insertVariable(pattern: string, name: string, value: any): string {
+  let result = pattern;
+  let match = varsRegex.exec(pattern);
+  while (match !== null) {
+    const variable = match[0];
+    const variableName = match[1];
+    if (variableName === name) {
+      result = result.split(variable).join(value);
+    }
+    match = varsRegex.exec(pattern);
+  }
+  return result;
+}
+
 export function createLabelFromDatasource(datasource: Datasource, pattern: string) {
-  const varsRegex = /\${([^}]*)}/g;
   let label = pattern;
   if (!datasource) {
     return label;

@@ -23,7 +23,7 @@ import { StateControllerComponent } from './state-controller.component';
 import { StatesControllerService } from '@home/pages/dashboard/states/states-controller.service';
 import { EntityId } from '@app/shared/models/id/entity-id';
 import { UtilsService } from '@core/services/utils.service';
-import { base64toObj, objToBase64 } from '@app/core/utils';
+import { base64toObj, insertVariable, isEmpty, objToBase64 } from '@app/core/utils';
 import { DashboardUtilsService } from '@core/services/dashboard-utils.service';
 import { EntityService } from '@core/http/entity.service';
 import { EntityType } from '@shared/models/entity-type.models';
@@ -123,11 +123,10 @@ export class EntityStateControllerComponent extends StateControllerComponent imp
     if (this.states && this.states[id]) {
       this.resolveEntity(params).subscribe(
         () => {
-          const newState: StateObject = {
+          this.stateObject[this.stateObject.length - 1] = {
             id,
             params
           };
-          this.stateObject[this.stateObject.length - 1] = newState;
           this.gotoState(this.stateObject[this.stateObject.length - 1].id, true, openRightLayout);
         }
       );
@@ -203,14 +202,14 @@ export class EntityStateControllerComponent extends StateControllerComponent imp
         const targetParams = params && params.targetEntityParamName ? params[params.targetEntityParamName] : params;
         const entityName = targetParams && targetParams.entityName ? targetParams.entityName : '';
         const entityLabel = targetParams && targetParams.entityLabel ? targetParams.entityLabel : '';
-        result = this.utils.insertVariable(stateName, 'entityName', entityName);
-        result = this.utils.insertVariable(result, 'entityLabel', entityLabel);
+        result = insertVariable(stateName, 'entityName', entityName);
+        result = insertVariable(result, 'entityLabel', entityLabel);
         for (const prop of Object.keys(params)) {
           if (params[prop] && params[prop].entityName) {
-            result = this.utils.insertVariable(result, prop + ':entityName', params[prop].entityName);
+            result = insertVariable(result, prop + ':entityName', params[prop].entityName);
           }
           if (params[prop] && params[prop].entityLabel) {
-            result = this.utils.insertVariable(result, prop + ':entityLabel', params[prop].entityLabel);
+            result = insertVariable(result, prop + ':entityLabel', params[prop].entityLabel);
           }
         }
       }
@@ -276,20 +275,13 @@ export class EntityStateControllerComponent extends StateControllerComponent imp
     if (this.stateObject.length === 1) {
       const state = this.stateObject[0];
       const rootStateId = this.dashboardUtils.getRootStateId(this.states);
-      if (state.id === rootStateId && (!state.params || this.isEmpty(state.params))) {
+      if (state.id === rootStateId && (!state.params || isEmpty(state.params))) {
         return true;
       }
     }
     return false;
   }
 
-  private isEmpty(obj: any): boolean {
-    for (const key of Object.keys(obj)) {
-      return !Object.prototype.hasOwnProperty.call(obj, key);
-    }
-    return true;
-  }
-
   private resolveEntity(params: StateParams): Observable<void> {
     if (params && params.targetEntityParamName) {
       params = params[params.targetEntityParamName];
@@ -313,10 +305,7 @@ export class EntityStateControllerComponent extends StateControllerComponent imp
   }
 
   private isEntityResolved(params: StateParams): boolean {
-    if (!params.entityName || !params.entityName.length) {
-      return false;
-    }
-    return true;
+    return !(!params.entityName || !params.entityName.length);
   }
 
   private getStateObjById(id: string): StateObject {