fix: #8320, dont load moderators separately for each category

src/controllers/admin/admins-mods.js

@@ -1,8 +1,11 @@
 'use strict';
 
+const _ = require('lodash');
+
 const groups = require('../../groups');
 const categories = require('../../categories');
 const privileges = require('../../privileges');
+const user = require('../../user');
 
 const AdminsMods = module.exports;
 
@@ -23,9 +26,12 @@ AdminsMods.get = async function (req, res) {
 
 async function getModeratorsOfCategories(uid) {
 	const categoryData = await categories.buildForSelect(uid, 'find', ['depth']);
-	const moderators = await Promise.all(categoryData.map(c => categories.getModerators(c.cid)));
+	const moderatorUids = await categories.getModeratorUids(categoryData.map(c => c.cid));
+	const uids = _.uniq(_.flatten(moderatorUids));
+	const moderatorData = await user.getUsersFields(uids, ['uid', 'username', 'userslug', 'picture']);
+	const moderatorMap = _.zipObject(uids, moderatorData);
 	categoryData.forEach((c, index) => {
-		c.moderators = moderators[index];
+		c.moderators = moderatorUids[index].map(uid => moderatorMap[uid]);
 	});
 	return categoryData;
 }