refactor to ES modules

js/transform.js

@@ -0,0 +1,21 @@
+export default class Transform {
+  static championshipsToLocations(championships) {
+    return Transform.unique(Transform.flatten(championships))
+  }
+
+  static flatten(object) {
+    return Object.values(object).reduce((arr, t) => arr.concat(Object.values(t)), [])
+  }
+
+  static unique(array) {
+    return [...new Set(array)]
+  }
+
+  static dropChampionshipsBefore(championshipsToday, time) {
+    return Object.keys(championshipsToday).filter((t) => parseInt(t) >= time)
+  }
+
+  static time(time) {
+    return Math.floor(time/60).toString().padStart(2, '0') + ":" + (time % 60).toString().padStart(2, '0')
+  }
+}