Finish group-by util

Move function to util, add tests.
2019-04-27 18:41:26 +01:00
parent 283ec1d48a
commit 185d7c58c2
3 changed files with 71 additions and 24 deletions
@@ -0,0 +1,27 @@
+//
+// Code from https://github.com/HeroicEric/ember-group-by (MIT licensed)
+//
+import { A } from '@ember/array';
+import { get } from '@ember/object';
+import { isPresent } from '@ember/utils';
+
+export default function groupBy (collection, property) {
+  let groups = A();
+  let items = collection;
+
+  if (items) {
+    items.forEach(function(item) {
+      let value = get(item, property);
+      let group = groups.findBy('value', value);
+
+      if (isPresent(group)) {
+        get(group, 'items').push(item);
+      } else {
+        group = { property: property, value: value, items: [item] };
+        groups.push(group);
+      }
+    });
+  }
+
+  return groups;
+}