refactoring

docs/intensivstationen.js

@@ -9,3 +9,24 @@ function displayIntensiveCareCapacitiesChart(
             intensiveCareCapacitiesChartView.displayChart({ data: json.data, title: kreisText });
         });
 }
+
+function displayFreeBedsChart({ freeBedsChartView, kreisText, kreisValue }) {
+    fetch(`data/intensivstationen/intensivstationen-${kreisValue}.json`)
+        .then(response => response.json())
+        .then(json =>
+            freeBedsChartView.displayChart(
+                {
+                    data: get_free_beds_divided_by_all_beds_in_percent(json.data),
+                    title: kreisText
+                }));
+}
+
+function get_free_beds_divided_by_all_beds_in_percent(data) {
+    return data.map(({ date, betten_frei, betten_belegt }) =>
+    (
+        {
+            "date": date,
+            "free_beds_divided_by_all_beds_in_percent": betten_frei / (betten_frei + betten_belegt) * 100
+        }
+    ));
+}