Add notification grouping for follow notifications (#32085)

app/javascript/mastodon/actions/notification_groups.ts

@@ -68,10 +68,15 @@ function dispatchAssociatedRecords(
     dispatch(importFetchedStatuses(fetchedStatuses));
 }
 
+const supportedGroupedNotificationTypes = ['favourite', 'reblog'];
+
 export const fetchNotifications = createDataLoadingThunk(
   'notificationGroups/fetch',
   async (_params, { getState }) =>
-    apiFetchNotificationGroups({ exclude_types: getExcludedTypes(getState()) }),
+    apiFetchNotificationGroups({
+      grouped_types: supportedGroupedNotificationTypes,
+      exclude_types: getExcludedTypes(getState()),
+    }),
   ({ notifications, accounts, statuses }, { dispatch }) => {
     dispatch(importFetchedAccounts(accounts));
     dispatch(importFetchedStatuses(statuses));
@@ -93,6 +98,7 @@ export const fetchNotificationsGap = createDataLoadingThunk(
   'notificationGroups/fetchGap',
   async (params: { gap: NotificationGap }, { getState }) =>
     apiFetchNotificationGroups({
+      grouped_types: supportedGroupedNotificationTypes,
       max_id: params.gap.maxId,
       exclude_types: getExcludedTypes(getState()),
     }),
@@ -109,6 +115,7 @@ export const pollRecentNotifications = createDataLoadingThunk(
   'notificationGroups/pollRecentNotifications',
   async (_params, { getState }) => {
     return apiFetchNotificationGroups({
+      grouped_types: supportedGroupedNotificationTypes,
       max_id: undefined,
       exclude_types: getExcludedTypes(getState()),
       // In slow mode, we don't want to include notifications that duplicate the already-displayed ones

app/javascript/mastodon/api/notifications.ts

@@ -31,6 +31,7 @@ export const apiFetchNotifications = async (
 
 export const apiFetchNotificationGroups = async (params?: {
   url?: string;
+  grouped_types?: string[];
   exclude_types?: string[];
   max_id?: string;
   since_id?: string;