Migrate to a monorepo structure (#2909)

packages/twenty-front/src/modules/activities/timeline/utils/groupActivitiesByMonth.ts

@@ -0,0 +1,31 @@
+import { ActivityForDrawer } from '@/activities/types/ActivityForDrawer';
+
+export interface ActivityGroup {
+  month: number;
+  year: number;
+  items: ActivityForDrawer[];
+}
+
+export const groupActivitiesByMonth = (activities: ActivityForDrawer[]) => {
+  const acitivityGroups: ActivityGroup[] = [];
+  for (const activity of activities) {
+    const d = new Date(activity.createdAt);
+    const month = d.getMonth();
+    const year = d.getFullYear();
+
+    const matchingGroup = acitivityGroups.find(
+      (x) => x.year === year && x.month === month,
+    );
+    if (matchingGroup) {
+      matchingGroup.items.push(activity);
+    } else {
+      acitivityGroups.push({
+        year,
+        month,
+        items: [activity],
+      });
+    }
+  }
+
+  return acitivityGroups.sort((a, b) => b.year - a.year || b.month - a.month);
+};