use _.uniq

src/posts/category.js

@@ -28,11 +28,9 @@ module.exports = function (Posts) {
 			},
 			function (_postData, next) {
 				postData = _postData;
-				tids = postData.map(function (post) {
-					return post.tid;
-				}).filter(function (tid, index, array) {
-					return tid && array.indexOf(tid) === index;
-				});
+				tids = _.uniq(postData.map(function (post) {
+					return post && post.tid;
+				}).filter(Boolean));
 
 				topics.getTopicsFields(tids, ['cid'], next);
 			},

src/privileges/categories.js

@@ -232,9 +232,7 @@ module.exports = function (privileges) {
 			return callback(null, []);
 		}
 
-		cids = cids.filter(function (cid, index, array) {
-			return array.indexOf(cid) === index;
-		});
+		cids = _.uniq(cids);
 
 		async.waterfall([
 			function (next) {

src/privileges/posts.js

@@ -2,6 +2,7 @@
 'use strict';
 
 var async = require('async');
+var _ = require('lodash');
 
 var meta = require('../meta');
 var posts = require('../posts');
@@ -72,17 +73,18 @@ module.exports = function (privileges) {
 		var tids;
 		var tidToTopic = {};
 
+		pids = _.uniq(pids);
+
 		async.waterfall([
 			function (next) {
 				posts.getPostsFields(pids, ['uid', 'tid', 'deleted'], next);
 			},
 			function (_posts, next) {
 				postData = _posts;
-				tids = _posts.map(function (post) {
+				tids = _.uniq(_posts.map(function (post) {
 					return post && post.tid;
-				}).filter(function (tid, index, array) {
-					return tid && array.indexOf(tid) === index;
-				});
+				}).filter(Boolean));
+
 				topics.getTopicsFields(tids, ['deleted', 'cid'], next);
 			},
 			function (topicData, next) {

src/privileges/users.js

@@ -2,6 +2,7 @@
 'use strict';
 
 var async = require('async');
+var _ = require('lodash');
 
 var user = require('../user');
 var groups = require('../groups');
@@ -51,9 +52,7 @@ module.exports = function (privileges) {
 					return filterIsModerator(cids, uid, cids.map(function () { return true; }), callback);
 				}
 
-				uniqueCids = cids.filter(function (cid, index, array) {
-					return array.indexOf(cid) === index;
-				});
+				uniqueCids = _.uniq(cids);
 
 				helpers.isUserAllowedTo('moderate', uid, uniqueCids, next);
 			},

src/search.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var async = require('async');
+var _ = require('lodash');
 
 var db = require('./database');
 var posts = require('./posts');
@@ -79,9 +80,7 @@ function searchInContent(data, callback) {
 		function (mainPids, next) {
 			pids = mainPids.concat(pids).map(function (pid) {
 				return pid && pid.toString();
-			}).filter(function (pid, index, array) {
-				return pid && array.indexOf(pid) === index;
-			});
+			}).filter(Boolean);
 
 			privileges.posts.filter('read', pids, data.uid, next);
 		},
@@ -392,9 +391,8 @@ function getSearchCids(data, callback) {
 			}, next);
 		},
 		function (results, next) {
-			var cids = results.watchedCids.concat(results.childrenCids).concat(data.categories).filter(function (cid, index, array) {
-				return cid && array.indexOf(cid) === index;
-			});
+			var cids = results.watchedCids.concat(results.childrenCids).concat(data.categories).filter(Boolean);
+			cids = _.uniq(cids);
 			next(null, cids);
 		},
 	], callback);

src/topics.js

@@ -101,14 +101,14 @@ Topics.getTopicsByTids = function (tids, uid, callback) {
 			function mapFilter(array, field) {
 				return array.map(function (topic) {
 					return topic && topic[field] && topic[field].toString();
-				}).filter(function (value, index, array) {
-					return utils.isNumber(value) && array.indexOf(value) === index;
+				}).filter(function (value) {
+					return utils.isNumber(value);
 				});
 			}
 
 			topics = _topics;
-			uids = mapFilter(topics, 'uid');
-			cids = mapFilter(topics, 'cid');
+			uids = _.uniq(mapFilter(topics, 'uid'));
+			cids = _.uniq(mapFilter(topics, 'cid'));
 
 			async.parallel({
 				users: function (next) {

src/topics/suggested.js

@@ -25,8 +25,8 @@ module.exports = function (Topics) {
 			},
 			function (results, next) {
 				var tids = results.tagTids.concat(results.searchTids).concat(results.categoryTids);
-				tids = tids.filter(function (_tid, index, array) {
-					return parseInt(_tid, 10) !== parseInt(tid, 10) && array.indexOf(_tid) === index;
+				tids = _.uniq(tids).filter(function (_tid) {
+					return parseInt(_tid, 10) !== parseInt(tid, 10);
 				});
 
 				if (stop === -1) {

src/topics/tags.js

@@ -23,11 +23,12 @@ module.exports = function (Topics) {
 				plugins.fireHook('filter:tags.filter', { tags: tags, tid: tid }, next);
 			},
 			function (data, next) {
-				tags = data.tags.slice(0, meta.config.maximumTagsPerTopic || 5);
+				tags = _.uniq(data.tags);
+				tags = tags.slice(0, meta.config.maximumTagsPerTopic || 5);
 				tags = tags.map(function (tag) {
 					return utils.cleanUpTag(tag, meta.config.maximumTagLength);
-				}).filter(function (tag, index, array) {
-					return tag && tag.length >= (meta.config.minimumTagLength || 3) && array.indexOf(tag) === index;
+				}).filter(function (tag) {
+					return tag && tag.length >= (meta.config.minimumTagLength || 3);
 				});
 
 				filterCategoryTags(tags, tid, next);

src/topics/teaser.js

@@ -2,6 +2,7 @@
 'use strict';
 
 var async = require('async');
+var _ = require('lodash');
 var S = require('string');
 var winston = require('winston');
 
@@ -57,11 +58,9 @@ module.exports = function (Topics) {
 			},
 			function (_postData, next) {
 				postData = _postData;
-				var uids = postData.map(function (post) {
+				var uids = _.uniq(postData.map(function (post) {
 					return post.uid;
-				}).filter(function (uid, index, array) {
-					return array.indexOf(uid) === index;
-				});
+				}));
 
 				user.getUsersFields(uids, ['uid', 'username', 'userslug', 'picture'], next);
 			},

src/topics/unread.js

@@ -2,6 +2,7 @@
 'use strict';
 
 var async = require('async');
+var _ = require('lodash');
 
 var db = require('../database');
 var user = require('../user');
@@ -118,10 +119,10 @@ module.exports = function (Topics) {
 					}
 				}).map(function (topic) {
 					return topic.value;
-				}).filter(function (tid, index, array) {
-					return array.indexOf(tid) === index;
 				});
 
+				tids = _.uniq(tids);
+
 				if (params.filter === 'watched') {
 					Topics.filterWatchedTids(tids, uid, next);
 				} else {
@@ -222,8 +223,8 @@ module.exports = function (Topics) {
 			return setImmediate(callback, null, false);
 		}
 
-		tids = tids.filter(function (tid, index, array) {
-			return tid && utils.isNumber(tid) && array.indexOf(tid) === index;
+		tids = _.uniq(tids).filter(function (tid) {
+			return tid && utils.isNumber(tid);
 		});
 
 		if (!tids.length) {
@@ -260,9 +261,9 @@ module.exports = function (Topics) {
 			function (results, next) {
 				var cids = results.topicData.map(function (topic) {
 					return topic && topic.cid;
-				}).filter(function (topic, index, array) {
-					return topic && array.indexOf(topic) === index;
-				});
+				}).filter(Boolean);
+
+				cids = _.uniq(cids);
 
 				categories.markAsRead(cids, uid, next);
 			},

src/user.js

@@ -64,9 +64,7 @@ User.getUsersWithFields = function (uids, fields, uid, callback) {
 			plugins.fireHook('filter:users.addFields', { fields: fields }, next);
 		},
 		function (data, next) {
-			data.fields = data.fields.filter(function (field, index, array) {
-				return array.indexOf(field) === index;
-			});
+			data.fields = _.uniq(data.fields);
 
 			async.parallel({
 				userData: function (next) {

src/user/delete.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var async = require('async');
+var _ = require('lodash');
 
 var db = require('../database');
 var posts = require('../posts');
@@ -152,9 +153,7 @@ module.exports = function (User) {
 				}, next);
 			},
 			function (pids, next) {
-				pids = pids.upvotedPids.concat(pids.downvotedPids).filter(function (pid, index, array) {
-					return pid && array.indexOf(pid) === index;
-				});
+				pids = _.uniq(pids.upvotedPids.concat(pids.downvotedPids).filter(Boolean));
 
 				async.eachSeries(pids, function (pid, next) {
 					posts.unvote(pid, uid, next);