refator(socket.io): deprecate socketGroups.getChatGroups in favour of api.admin.listGroups

src/api/admin.js

@@ -3,6 +3,7 @@
 const meta = require('../meta');
 const analytics = require('../analytics');
 const privileges = require('../privileges');
+const groups = require('../groups');
 
 const adminApi = module.exports;
 
@@ -34,3 +35,11 @@ adminApi.getAnalyticsData = async (caller, { set, until, amount, units }) => {
 	const getStats = units === 'days' ? analytics.getDailyStatsForSet : analytics.getHourlyStatsForSet;
 	return await getStats(`analytics:${set}`, parseInt(until, 10) || Date.now(), amount);
 };
+
+adminApi.listGroups = async () => {
+	// N.B. Returns all groups, even hidden. Beware of leakage.
+	// Access control handled at controller level
+
+	const payload = await groups.getNonPrivilegeGroups('groups:createtime', 0, -1, { ephemeral: false });
+	return { groups: payload };
+};