check for online/offline users, added custom redis sismembers method, fix for category view not showing up if it has no topics

public/css/style.less

@@ -723,3 +723,14 @@ body .navbar .nodebb-inline-block {
 	  max-height:60px;
 	}
 }
+
+.username-field {
+	.icon-circle {
+		font-size: 12px;
+		color: green;
+	}
+	.icon-circle-blank {
+		font-size: 12px;
+		color: red;
+	}
+}

public/src/ajaxify.js

@@ -56,6 +56,8 @@ var ajaxify = {};
 					callback();
 				}
 				
+				app.process_page();
+				
 				jQuery('#content, #footer').fadeIn(200);
 			}, url, template);
 

public/src/app.js

@@ -278,6 +278,35 @@ var socket,
 		app.current_room = room;
 	};
 
+	app.process_page = function() {
+
+		function populate_online_users() {
+			var uids = [];
+
+			jQuery('.post-row').each(function() {
+				uids.push(this.getAttribute('data-uid'));
+			});
+			
+			socket.emit('api:user.get_online_users', uids);
+		}
+
+
+		populate_online_users();
+
+	}
+
+	socket.on('api:user.get_online_users', function(users) {
+		jQuery('.username-field').each(function() {
+			var uid = jQuery(this).parents('li').attr('data-uid');
+			
+			if (uid && jQuery.inArray(uid, users) !== -1) {
+				jQuery(this).prepend('<i class="icon-circle"></i>');
+			} else {
+				jQuery(this).prepend('<i class="icon-circle-blank"></i>');
+			}
+		});
+	});
+
 	jQuery('document').ready(function() {
 		app.enter_room('global');
 

public/templates/topic.tpl

@@ -12,7 +12,7 @@
 
 
 	<!-- BEGIN main_posts -->
-		<li class="row main-post" data-pid="{main_posts.pid}" data-deleted="{main_posts.deleted}">
+		<li class="row post-row main-post" data-pid="{main_posts.pid}" data-uid="{main_posts.uid}" data-deleted="{main_posts.deleted}">
 			<div class="span12">
 				<div class="post-block">
 					<a class="main-avatar" href="/users/{main_posts.username}">
@@ -37,7 +37,7 @@
 
 					<hr />
 					<small>
-						posted {main_posts.relativeTime} ago by <strong><a href="/users/{main_posts.username}">{main_posts.username}</a></strong>
+						posted {main_posts.relativeTime} ago by <strong><a href="/users/{main_posts.username}" class="username-field">{main_posts.username}</a></strong>
 						<span class="{main_posts.edited-class}"><i class="icon-edit" title="edited by {main_posts.editor} {main_posts.relativeEditTime} ago"></i></span>
 					</small>
 
@@ -52,7 +52,7 @@
 	<!-- END main_posts -->
 
 	<!-- BEGIN posts -->
-		<li class="row" data-pid="{posts.pid}" data-uid="{posts.uid}" data-deleted="{posts.deleted}">
+		<li class="row post-row" data-pid="{posts.pid}" data-uid="{posts.uid}" data-deleted="{posts.deleted}">
 			<div class="span1 profile-image-block visible-desktop">
 				<!--<i class="icon-spinner icon-spin icon-2x pull-left"></i>-->
 				<a href="/users/{posts.username}">
@@ -72,7 +72,7 @@
 							<div id="favs_{posts.pid}_{posts.uid}" class="favourite hidden-phone"><span class="post_rep_{posts.pid}">{posts.post_rep}</span><i class="{posts.fav_star_class}"></i></div>
 							<div class="post_reply"><i class="icon-reply"></i></div>
 						</span>
-						<img class="hidden-desktop" src="{posts.gravatar}?s=10" align="left" /> posted by <strong><a href="/users/{posts.username}">{posts.username}</a></strong> {posts.relativeTime} ago
+						<img class="hidden-desktop" src="{posts.gravatar}?s=10" align="left" /> posted by <strong><a class="username-field" href="/users/{posts.username}">{posts.username}</a></strong> {posts.relativeTime} ago
 						<span class="{posts.edited-class} hidden-phone">| last edited by <strong><a href="/users/{posts.editor}">{posts.editor}</a></strong> {posts.relativeEditTime} ago</span>
 						<span class="{posts.edited-class}"><i class="icon-edit visible-phone" title="edited by {posts.editor} {posts.relativeEditTime} ago"></i></span>
 					</div>
@@ -272,6 +272,7 @@
 			}
 		});
 
+
 		$('.post-container').delegate('.edit', 'click', function(e) {
 			var pid = ($(this).attr('id') || $(this.parentNode).attr('id')).split('_')[1];
 			app.open_post_window('edit', "{topic_id}", "{topic_name}", pid);
@@ -297,6 +298,7 @@
 			'event:topic_moved', 'event:post_edited', 'event:post_deleted', 'event:post_restored',
 			'api:posts.favourite'
 		]);
+
 		socket.on('api:get_users_in_room', function(users) {
 			var anonymous = users.anonymous,
 				usernames = users.usernames,

src/redis.js

@@ -3,7 +3,8 @@
 		ERROR_LOGS = true,
 
 		redis = require('redis'),
-		config = require('../config.js');
+		config = require('../config.js'),
+		utils = require('./utils.js');
 	
 
 	RedisDB.exports = redis.createClient(config.redis.port, config.redis.host, config.redis.options);
@@ -22,4 +23,18 @@
 		}
 	}
 
+
+	/*
+	* A possibly more efficient way of doing multiple sismember calls
+	*/
+	RedisDB.exports.sismembers = function(key, needles, callback) {
+		var tempkey = key + ':temp:' + utils.generateUUID();
+		RedisDB.exports.sadd(tempkey, needles, function() {
+			RedisDB.exports.sinter(key, tempkey, function(err, data) {
+				RedisDB.exports.del(tempkey);
+				callback(err, data);
+			});
+		});
+	};
+
 }(module));

src/topics.js

@@ -72,6 +72,15 @@ marked.setOptions({
 					callback(false);
 					return;
 				}
+				if (tids.length == 0) {
+					callback({
+						'category_name' : category_id ? category_name : 'Recent',
+						'show_topic_button' : category_id ? 'show' : 'hidden',
+						'category_id': category_id || 0,
+						'topics': topics
+					});
+				}
+				
 				active_usernames = replies[1];
 				var topics = [];
 

src/user.js

@@ -660,7 +660,22 @@ var config = require('../config.js'),
 				}
 			});
 		}
-	}
+	};
+
+	User.get_online_users = function(socket, uids) {
+		RDB.sismembers('users:online', uids, function(err, data) {
+			socket.emit('api:user.get_online_users', data);
+		});		
+	};
+
+	User.go_online = function(uid) {
+		RDB.sadd('users:online', uid);
+	};
+
+	User.go_offline = function(uid) {
+		RDB.srem('users:online', uid);
+	};
+
 
 	User.active = {
 		get_record : function(socket) {

src/websockets.js

@@ -48,6 +48,7 @@ var SocketIO = require('socket.io').listen(global.server,{log:false}),
 		var hs = socket.handshake;
 		
 		var uid = users[hs.sessionID];
+		user.go_online(uid);
 		
 		
 		/*process.on('uncaughtException', function(err) {
@@ -59,6 +60,7 @@ var SocketIO = require('socket.io').listen(global.server,{log:false}),
 		socket.emit('event:connect', {status: 1});
 		
 		socket.on('disconnect', function() {
+			user.go_offline(uid);
       		delete users[hs.sessionID];
    		});
 
@@ -154,6 +156,10 @@ var SocketIO = require('socket.io').listen(global.server,{log:false}),
 			user.reset.commit(socket, data.code, data.password);
 		});
 
+		socket.on('api:user.get_online_users', function(data) {
+			user.get_online_users(socket, data);
+		});
+
 		socket.on('api:topics.post', function(data) {
 			topics.post(socket, uid, data.title, data.content, data.category_id);
 		});