ability for users to now follow/subscribe to threads

public/src/forum/topic.js

@@ -155,6 +155,46 @@
 			if (postEls[x].getAttribute('data-deleted') === '1') toggle_post_delete_state(postEls[x].getAttribute('data-pid'));
 			postEls[x].removeAttribute('data-deleted');
 		}
+
+		// Follow Thread State
+		var followEl = $('.main-post .follow'),
+			set_follow_state = function(state, quiet) {
+				if (state && !followEl.hasClass('btn-success')) {
+					followEl.addClass('btn-success');
+					followEl[0].title = 'You are currently receiving updates to this topic';
+					if (!quiet) {
+						app.alert({
+							alert_id: 'topic_follow',
+							timeout: 2500,
+							title: 'Following Topic',
+							message: 'You will now be receiving notifications when somebody posts to this topic.',
+							type: 'success'
+						});
+					}
+				} else if (!state && followEl.hasClass('btn-success')) {
+					followEl.removeClass('btn-success');
+					followEl[0].title = 'Be notified of new replies in this topic';
+					if (!quiet) {
+						app.alert({
+							alert_id: 'topic_follow',
+							timeout: 2500,
+							title: 'Not Following Topic',
+							message: 'You will no longer receive notifications from this topic.',
+							type: 'success'
+						});
+					}
+				}
+			};
+		socket.on('api:topic.followCheck', function(state) {
+			set_follow_state(state, true);
+		});
+		socket.on('api:topic.follow', function(data) {
+			set_follow_state(data.follow);
+		});
+		socket.emit('api:topic.followCheck', tid);
+		followEl[0].addEventListener('click', function() {
+			socket.emit('api:topic.follow', tid);
+		}, false);
 	});
 
 
@@ -589,21 +629,46 @@
 	}
 
 	function toggle_post_delete_state(pid) {
-		var postEl = $(document.querySelector('#post-container li[data-pid="' + pid + '"]'));
+		var	postEl = $(document.querySelector('#post-container li[data-pid="' + pid + '"]'));
+
+		if (postEl[0]) {
 			quoteEl = $(postEl[0].querySelector('.quote')),
 			favEl = $(postEl[0].querySelector('.favourite')),
 			replyEl = $(postEl[0].querySelector('.post_reply'));
 
-		if (!postEl.hasClass('deleted')) {
-			quoteEl.addClass('none');
-			favEl.addClass('none');
-			replyEl.addClass('none');
-		} else {
+			socket.once('api:post.privileges', function(privileges) {
+				if (privileges.editable) {
+					if (!postEl.hasClass('deleted')) {
+						toggle_post_tools(pid, false);
+					} else {
+						toggle_post_tools(pid, true);
+					}
+				}
+
+				if (privileges.view_deleted) {
+					postEl.toggleClass('deleted');
+				} else {
+					postEl.toggleClass('none');
+				}
+			});
+			socket.emit('api:post.privileges', pid);
+		}
+	}
+
+	function toggle_post_tools(pid, state) {
+		var	postEl = $(document.querySelector('#post-container li[data-pid="' + pid + '"]')),
+			quoteEl = $(postEl[0].querySelector('.quote')),
+			favEl = $(postEl[0].querySelector('.favourite')),
+			replyEl = $(postEl[0].querySelector('.post_reply'));
+
+		if (state) {
 			quoteEl.removeClass('none');
 			favEl.removeClass('none');
 			replyEl.removeClass('none');
+		} else {
+			quoteEl.addClass('none');
+			favEl.addClass('none');
+			replyEl.addClass('none');
 		}
-
-		postEl.toggleClass('deleted');
 	}
 })();

public/templates/topic.tpl

@@ -31,6 +31,7 @@
 					<div class="topic-buttons pull-left">
 						<a href="/users/{main_posts.username}" class="username-field btn hidden-phone">{main_posts.username}</a>
 						<a target="_blank" class="btn hidden-phone" href="../{topic_id}.rss"><i class="icon-rss-sign"></i></a>
+						<button class="btn follow" type="button"><i class="icon-eye-open"></i></button>
 						<button id="ids_{main_posts.pid}_{main_posts.uid}" class="btn edit {main_posts.display_moderator_tools}" type="button"><i class="icon-pencil"></i></button>
 						<button id="ids_{main_posts.pid}_{main_posts.uid}" class="btn delete {main_posts.display_moderator_tools}" type="button"><i class="icon-trash"></i></button>
 						<button id="quote_{main_posts.pid}_{main_posts.uid}" class="btn quote" type="button"><i class="icon-quote-left"></i></button>

src/postTools.js

@@ -1,5 +1,6 @@
 var	RDB = require('./redis.js'),
 	posts = require('./posts.js'),
+	topics = require('./topics'),
 	threadTools = require('./threadTools.js'),
 	user = require('./user.js'),
 	async = require('async'),

src/posts.js

@@ -199,6 +199,9 @@ marked.setOptions({
 						timeout: 2000
 					});
 
+					// Send notifications to users who are following this topic
+					threadTools.notify_followers(tid, uid);
+
 					user.getUserFields(uid, ['username','reputation','picture','signature'], function(data) {
 						
 						var timestamp = new Date().getTime();

src/threadTools.js

@@ -2,8 +2,8 @@ var	RDB = require('./redis.js'),
 	topics = require('./topics.js'),
 	categories = require('./categories.js'),
 	user = require('./user.js'),
-	async = require('async');
-
+	async = require('async'),
+	notifications = require('./notifications.js');
 
 (function(ThreadTools) {
 	
@@ -160,4 +160,63 @@ var	RDB = require('./redis.js'),
 		});
 	}
 
+	ThreadTools.isFollowing = function(tid, current_user, callback) {
+		RDB.sismember('tid:' + tid + ':followers', current_user, function(err, following) {
+			callback(following);
+		});
+	}
+
+	ThreadTools.toggleFollow = function(tid, current_user, callback) {
+		ThreadTools.isFollowing(tid, current_user, function(following) {
+			if (!following) {
+				RDB.sadd('tid:' + tid + ':followers', current_user, function(err, success) {
+					if (!err) {
+						callback({
+							status: 'ok',
+							follow: true
+						});
+					} else callback({ status: 'error' });
+				});
+			} else {
+				RDB.srem('tid:' + tid + ':followers', current_user, function(err, success) {
+					if (!err) {
+						callback({
+							status: 'ok',
+							follow: false
+						});
+					} else callback({ status: 'error' });
+				});
+			}
+		});
+	}
+
+	ThreadTools.get_followers = function(tid, callback) {
+		RDB.smembers('tid:' + tid + ':followers', function(err, followers) {
+			callback(err, followers);
+		});
+	}
+
+	ThreadTools.notify_followers = function(tid, exceptUid) {
+		async.parallel([
+			function(next) {
+				topics.get_topic(tid, 0, function(threadData) {
+					// console.log(threadData);
+					notifications.create(threadData.teaser_username + ' has posted a reply to: "' + threadData.title + '"', null, '/topic/' + tid, 'topic:' + tid, function(nid) {
+						next(null, nid);
+					});
+				});
+			},
+			function(next) {
+				ThreadTools.get_followers(tid, function(err, followers) {
+					if (followers.indexOf(exceptUid) !== -1) followers.splice(followers.indexOf(exceptUid), 1);
+					next(null, followers);
+				});
+			}
+		], function(err, results) {
+			if (!err) {
+				notifications.push(results[0], results[1]);
+			}
+		});
+	}
+
 }(exports));

src/webserver.js

@@ -264,9 +264,9 @@ var express = require('express'),
 	app.get('/api/:method/:id*', api_method);
 
 	app.get('/test', function(req, res) {
-		meta.config.get(function(config) {
-			res.send(JSON.stringify(config, null, 4));
-		});
+		var ThreadTools = require('./threadTools.js');
+		ThreadTools.notify_followers(3);
+		res.send();
 	});
 
 

src/websockets.js

@@ -364,6 +364,24 @@ var SocketIO = require('socket.io').listen(global.server, { log:false }),
 				})
 			})
 		});
+
+		socket.on('api:post.privileges', function(pid) {
+			postTools.privileges(pid, uid, function(privileges) {
+				socket.emit('api:post.privileges', privileges);
+			});
+		});
+
+		socket.on('api:topic.followCheck', function(tid) {
+			threadTools.isFollowing(tid, uid, function(following) {
+				socket.emit('api:topic.followCheck', following);
+			});
+		});
+
+		socket.on('api:topic.follow', function(tid) {
+			threadTools.toggleFollow(tid, uid, function(follow) {
+				if (follow.status === 'ok') socket.emit('api:topic.follow', follow);
+			});
+		});
 	});
 	
 }(SocketIO));