all files / src/categories/ activeusers.js

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'use strict';
 
var async = require('async');
var posts = require('../posts');
var db = require('../database');
 
module.exports = function(Categories) {
 
	Categories.getActiveUsers = function(cid, callback) {
		async.waterfall([
			function (next) {
				db.getSortedSetRevRange('cid:' + cid + ':pids', 0, 24, next);
			},
			function (pids, next) {
				posts.getPostsFields(pids, ['uid'], next);
			},
			function (posts, next) {
				var uids = posts.map(function(post) {
					return post.uid;
				}).filter(function(uid, index, array) {
					return parseInt(uid, 10) && array.indexOf(uid) === index;
				});
 
				next(null, uids);
			}
		], callback);
	};
};