Fix calculation value in function for map widget

@@ -20,7 +20,15 @@ import { Datasource, DatasourceData } from '@app/shared/models/widget.models';
 import _ from 'lodash';
 import _ from 'lodash';
 import { Observable, Observer, of } from 'rxjs';
 import { Observable, Observer, of } from 'rxjs';
 import { map } from 'rxjs/operators';
 import { map } from 'rxjs/operators';
-import { createLabelFromDatasource, hashCode, isDefinedAndNotNull, isNumber, isUndefined, padValue } from '@core/utils';
+import {
+  createLabelFromDatasource,
+  hashCode,
+  isDefined,
+  isDefinedAndNotNull, isFunction,
+  isNumber,
+  isUndefined,
+  padValue
+} from '@core/utils';
 
 
 export function createTooltip(target: L.Layer,
 export function createTooltip(target: L.Layer,
     settings: MarkerSettings | PolylineSettings | PolygonSettings,
     settings: MarkerSettings | PolylineSettings | PolygonSettings,
@@ -403,6 +411,24 @@ export function safeExecute(func: (...args: any[]) => any, params = []) {
   return res;
   return res;
 }
 }
 
 
+export function functionValueCalculator(useFunction: boolean, func: (...args: any[]) => any, params = [], defaultValue: any) {
+  let res;
+  if (useFunction && isDefined(func) && isFunction(func)) {
+    try {
+      res = func(...params);
+      if (!isDefinedAndNotNull(res) || res === '') {
+        res = defaultValue;
+      }
+    } catch (err) {
+      res = defaultValue;
+      console.log('error in external function:', err);
+    }
+  } else {
+    res = defaultValue;
+  }
+  return res;
+}
+
 export function calculateNewPointCoordinate(coordinate: number, imageSize: number): number {
 export function calculateNewPointCoordinate(coordinate: number, imageSize: number): number {
   let pointCoordinate = coordinate / imageSize;
   let pointCoordinate = coordinate / imageSize;
   if (pointCoordinate < 0) {
   if (pointCoordinate < 0) {

@@ -15,7 +15,7 @@
 ///
 ///
 
 
 import L, { LatLngExpression, LeafletMouseEvent } from 'leaflet';
 import L, { LatLngExpression, LeafletMouseEvent } from 'leaflet';
-import { createTooltip, parseWithTranslation, safeExecute } from './maps-utils';
+import { createTooltip, functionValueCalculator, parseWithTranslation, safeExecute } from './maps-utils';
 import { FormattedData, PolygonSettings } from './map-models';
 import { FormattedData, PolygonSettings } from './map-models';
 
 
 export class Polygon {
 export class Polygon {
@@ -97,10 +97,7 @@ export class Polygon {
     }
     }
 
 
     private getPolygonColor(settings: PolygonSettings): string | null {
     private getPolygonColor(settings: PolygonSettings): string | null {
-      if (settings.usePolygonColorFunction) {
-        return safeExecute(settings.polygonColorFunction, [this.data, this.dataSources, this.data.dsIndex]);
-      } else {
-        return settings.polygonColor;
-      }
+      return functionValueCalculator(settings.usePolygonColorFunction, settings.polygonColorFunction,
+        [this.data, this.dataSources, this.data.dsIndex], settings.polygonColor);
     }
     }
 }
 }

@@ -18,7 +18,7 @@ import L, { PolylineDecoratorOptions } from 'leaflet';
 import 'leaflet-polylinedecorator';
 import 'leaflet-polylinedecorator';
 
 
 import { FormattedData, PolylineSettings } from './map-models';
 import { FormattedData, PolylineSettings } from './map-models';
-import { safeExecute } from '@home/components/widget/lib/maps/maps-utils';
+import { functionValueCalculator, safeExecute } from '@home/components/widget/lib/maps/maps-utils';
 
 
 export class Polyline {
 export class Polyline {
 
 
@@ -72,15 +72,12 @@ export class Polyline {
   getPolyStyle(settings: PolylineSettings): L.PolylineOptions {
   getPolyStyle(settings: PolylineSettings): L.PolylineOptions {
     return {
     return {
       interactive: false,
       interactive: false,
-      color: settings.useColorFunction ?
-        safeExecute(settings.colorFunction,
-          [this.data, this.dataSources, this.data.dsIndex]) : settings.color,
-      opacity: settings.useStrokeOpacityFunction ?
-        safeExecute(settings.strokeOpacityFunction,
-          [this.data, this.dataSources, this.data.dsIndex]) : settings.strokeOpacity,
-      weight: settings.useStrokeWeightFunction ?
-        safeExecute(settings.strokeWeightFunction,
-          [this.data, this.dataSources, this.data.dsIndex]) : settings.strokeWeight,
+      color: functionValueCalculator(settings.useColorFunction, settings.colorFunction,
+        [this.data, this.dataSources, this.data.dsIndex], settings.color),
+      opacity: functionValueCalculator(settings.useStrokeOpacityFunction, settings.strokeOpacityFunction,
+        [this.data, this.dataSources, this.data.dsIndex], settings.strokeOpacity),
+      weight: functionValueCalculator(settings.useStrokeWeightFunction, settings.strokeWeightFunction,
+        [this.data, this.dataSources, this.data.dsIndex], settings.strokeWeight)
     }
     }
   }
   }