added err first to some calls

src/posts.js

@@ -170,20 +170,28 @@ var db = require('./database'),
 				return callback(err);
 			}
 
-			if (pids.length) {
+			if(!pids.length) {
+				return callback(null, []);
+			}
+
 			plugins.fireHook('filter:post.getTopic', pids, function(err, posts) {
-					if (!err && posts.length > 0) {
+				if(err) {
+					return callback(err);
+				}
+
+				if(!posts.length) {
+					return callback(null, []);
+				}
+
+
 				Posts.getPostsByPids(pids, function(err, posts) {
+					if(err) {
+						return callback(err);
+					}
 					plugins.fireHook('action:post.gotTopic', posts);
-							callback(posts);
+					callback(null, posts);
 				});
-					} else {
-						callback(posts);
-					}
 			});
-			} else {
-				callback([]);
-			}
 		});
 	};
 

src/topics.js

@@ -161,9 +161,13 @@ var async = require('async'),
 	}
 
 	Topics.getTopicPosts = function(tid, start, end, current_user, callback) {
-		posts.getPostsByTid(tid, start, end, function(postData) {
+		posts.getPostsByTid(tid, start, end, function(err, postData) {
+			if(err) {
+				return callback(err);
+			}
+
 			if (Array.isArray(postData) && !postData.length) {
-				return callback([]);
+				return callback(null, []);
 			}
 
 			for(var i=0; i<postData.length; ++i) {
@@ -176,8 +180,9 @@ var async = require('async'),
 
 			function getFavouritesData(next) {
 				var pids = [];
-				for (var i = 0; i < postData.length; ++i)
+				for (var i = 0; i < postData.length; ++i) {
 					pids.push(postData[i].pid);
+				}
 
 				favourites.getFavouritesByPostIDs(pids, current_user, function(fav_data) {
 					next(null, fav_data);
@@ -203,6 +208,10 @@ var async = require('async'),
 			}
 
 			async.parallel([getFavouritesData, addUserInfoToPosts, getPrivileges], function(err, results) {
+				if(err) {
+					return callback(err);
+				}
+
 				var fav_data = results[0],
 					privileges = results[2];
 
@@ -211,7 +220,7 @@ var async = require('async'),
 					postData[i].display_moderator_tools = ((current_user != 0) && (postData[i].uid == current_user || privileges.editable));
 				}
 
-				callback(postData);
+				callback(null, postData);
 			});
 		});
 	}
@@ -539,9 +548,7 @@ var async = require('async'),
 			};
 
 			function getTopicPosts(next) {
-				Topics.getTopicPosts(tid, start, end, current_user, function(topicPosts) {
-					next(null, topicPosts);
-				});
+				Topics.getTopicPosts(tid, start, end, current_user, next);
 			};
 
 			function getPrivileges(next) {

src/websockets.js

@@ -875,7 +875,7 @@ websockets.init = function(io) {
 			var start = data.after,
 				end = start + 9;
 
-			topics.getTopicPosts(data.tid, start, end, uid, function(posts) {
+			topics.getTopicPosts(data.tid, start, end, uid, function(err, posts) {
 				callback({
 					posts: posts
 				});