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127 lines
3.5 KiB
JavaScript
127 lines
3.5 KiB
JavaScript
/*!
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* nodeclub - site index controller.
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* Copyright(c) 2012 fengmk2 <fengmk2@gmail.com>
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* Copyright(c) 2012 muyuan
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* MIT Licensed
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*/
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/**
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* Module dependencies.
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*/
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var User = require('../proxy').User;
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var Topic = require('../proxy').Topic;
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var config = require('../config');
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var EventProxy = require('eventproxy');
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var mcache = require('memory-cache');
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// 主页的缓存工作。主页是需要主动缓存的
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setInterval(function () {
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var limit = config.list_topic_count;
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// 只缓存第一页, page = 1
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var options = { skip: (1 - 1) * limit, limit: limit, sort: [
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['top', 'desc' ],
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[ 'last_reply_at', 'desc' ]
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] };
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// 为所有版块（tab）做缓存
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['', '全部'].concat(config.tabs).forEach(function (pair) {
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var tabValue = pair[0];
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var query = {};
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if (tabValue) {
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query.tab = tabValue;
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}
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var optionsStr = JSON.stringify(query) + JSON.stringify(options);
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Topic.getTopicsByQuery({}, options, function (err, topics) {
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mcache.put(optionsStr, topics);
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return topics;
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});
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});
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}, 1000 * 5); // 五秒更新一次
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// END 主页的缓存工作
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exports.index = function (req, res, next) {
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var page = parseInt(req.query.page, 10) || 1;
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page = page > 0 ? page : 1;
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var tab = req.query.tab || req.session.tab || '';
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req.session.tab = tab;
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var limit = config.list_topic_count;
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var proxy = EventProxy.create('topics', 'tops', 'no_reply_topics', 'pages',
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function (topics, tops, no_reply_topics, pages) {
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res.render('index', {
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topics: topics,
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current_page: page,
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list_topic_count: limit,
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tops: tops,
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no_reply_topics: no_reply_topics,
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pages: pages,
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site_links: config.site_links,
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tabs: config.tabs,
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tab: tab,
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});
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});
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proxy.fail(next);
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// 取主题
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var query = {};
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if (tab && tab !== 'all') {
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query.tab = tab;
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}
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var options = { skip: (page - 1) * limit, limit: limit, sort: [
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['top', 'desc' ],
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[ 'last_reply_at', 'desc' ]
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] };
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var optionsStr = JSON.stringify(query) + JSON.stringify(options);
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if (mcache.get(optionsStr)) {
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proxy.emit('topics', mcache.get(optionsStr));
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} else {
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Topic.getTopicsByQuery(query, options, proxy.done('topics', function (topics) {
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return topics;
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}));
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}
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// END 取主题
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// 取排行榜上的用户
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if (mcache.get('tops')) {
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proxy.emit('tops', mcache.get('tops'));
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} else {
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User.getUsersByQuery(
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{'$or': [
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{is_block: {'$exists': false}},
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{is_block: false}
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]},
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{ limit: 10, sort: [
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[ 'score', 'desc' ]
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] },
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proxy.done('tops', function (tops) {
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mcache.put('tops', tops, 1000 * 60 * 1);
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return tops;
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})
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);
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}
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// 取0回复的主题
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if (mcache.get('no_reply_topics')) {
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proxy.emit('no_reply_topics', mcache.get('no_reply_topics'));
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} else {
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Topic.getTopicsByQuery(
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{ reply_count: 0 },
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{ limit: 5, sort: [
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[ 'create_at', 'desc' ]
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] },
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proxy.done('no_reply_topics', function (no_reply_topics) {
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mcache.put('no_reply_topics', no_reply_topics, 1000 * 60 * 1);
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return no_reply_topics;
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}));
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}
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// 取分页数据
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if (mcache.get('pages')) {
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proxy.emit('pages', mcache.get('pages'));
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} else {
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Topic.getCountByQuery(query, proxy.done(function (all_topics_count) {
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var pages = Math.ceil(all_topics_count / limit);
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mcache.put(JSON.stringify(query) + 'pages', pages, 1000 * 60 * 1);
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proxy.emit('pages', pages);
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}));
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}
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};
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