feat: Inbox list filter (#8880)

* feat: Inbox list filter

* fix: routes after delete/unread

* fix: Specs

* feat: Handle sort in frontend

* chore: Minor fixes

* chore: Minor fix

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/store/modules/notifications/helpers.js

@@ -0,0 +1,45 @@
+export const filterByStatus = (snoozedUntil, filterStatus) =>
+  filterStatus === 'snoozed' ? !!snoozedUntil : !snoozedUntil;
+
+export const filterByType = (readAt, filterType) =>
+  filterType === 'read' ? !!readAt : !readAt;
+
+export const filterByTypeAndStatus = (
+  readAt,
+  snoozedUntil,
+  filterType,
+  filterStatus
+) => {
+  const shouldFilterByStatus = filterByStatus(snoozedUntil, filterStatus);
+  const shouldFilterByType = filterByType(readAt, filterType);
+  return shouldFilterByStatus && shouldFilterByType;
+};
+
+export const applyInboxPageFilters = (notification, filters) => {
+  const { status, type } = filters;
+  const { read_at: readAt, snoozed_until: snoozedUntil } = notification;
+
+  if (status && type)
+    return filterByTypeAndStatus(readAt, snoozedUntil, type, status);
+  if (status && !type) return filterByStatus(snoozedUntil, status);
+  if (!status && type) return filterByType(readAt, type);
+  return true;
+};
+
+const INBOX_SORT_OPTIONS = {
+  newest: 'desc',
+  oldest: 'asc',
+};
+
+const sortConfig = {
+  newest: (a, b) => b.created_at - a.created_at,
+  oldest: (a, b) => a.created_at - b.created_at,
+};
+
+export const sortComparator = (a, b, sortOrder) => {
+  const sortDirection = INBOX_SORT_OPTIONS[sortOrder];
+  if (sortOrder === 'newest' || sortOrder === 'oldest') {
+    return sortConfig[sortOrder](a, b, sortDirection);
+  }
+  return 0;
+};