isSeriesAvailable: check for datapoints emptiness

src/models/series.ts

@@ -9,6 +9,8 @@ import lodashMin from 'lodash/min';
 import lodashMinBy from 'lodash/minBy';
 import lodashMax from 'lodash/max';
 import lodashMaxBy from 'lodash/maxBy';
+import lodashIsNil from 'lodash/isNil';
+import lodashIncludes from 'lodash/includes';
 
 
 const SERIE_DEFAULTS = {
@@ -61,8 +63,25 @@ export class CoreSeries<T extends Serie> {
     return this._coreDefaults;
   }
 
+  private _isSerieEmpty(serie: T): boolean {
+    if(serie.datapoints.length > 0) {
+      for(const datapoint of serie.datapoints) {
+        // TODO: axis-related
+        if(!lodashIsNil(datapoint[1])) {
+          return false;
+        }
+      }
+    }
+    return true;
+  }
+
   get isSeriesAvailable(): boolean {
-    return this.visibleSeries.length > 0;
+    if(this.visibleSeries.length > 0) {
+      const seriesEmptiness = lodashMap(this.visibleSeries, this._isSerieEmpty.bind(this));
+      
+      return lodashIncludes(seriesEmptiness, false);
+    }
+    return false;
   }
 
   get visibleSeries(): Array<T> {