Added a route for getting user names by id.

server/commons/Handler.coffee

@@ -261,11 +261,12 @@ module.exports = class Handler
     tv4 = require('tv4').tv4
     res = tv4.validateMultiple(input, @jsonSchema)
     res
+    
+  @isID: (id) -> _.isString(id) and id.length is 24 and id.match(/[a-z0-9]/gi)?.length is 24
 
   getDocumentForIdOrSlug: (idOrSlug, done) ->
     idOrSlug = idOrSlug+''
-    isID = idOrSlug.length is 24 and idOrSlug.match(/[a-z0-9]/gi)?.length is 24
-    if isID
+    if Handler.isID(idOrSlug)
       @modelClass.findById(idOrSlug).exec (err, document) ->
         done(err, document)
     else

server/users/user_handler.coffee

@@ -1,11 +1,13 @@
-schema = require('./user_schema')
-crypto = require('crypto')
-request = require('request')
-User = require('./User')
-Handler = require('../commons/Handler')
+schema = require './user_schema'
+crypto = require 'crypto'
+request = require 'request'
+User = require './User'
+Handler = require '../commons/Handler'
 languages = require '../routes/languages'
 mongoose = require 'mongoose'
 config = require '../../server_config'
+errors = require '../commons/errors'
+async = require 'async'
 
 serverProperties = ['passwordHash', 'emailLower', 'nameLower', 'passwordReset']
 privateProperties = ['permissions', 'email', 'firstName', 'lastName', 'gender', 'facebookID', 'music', 'volume']
@@ -107,6 +109,27 @@ UserHandler = class UserHandler extends Handler
     if req.user and req.user._id.equals(id)
       return @sendSuccess(res, @formatEntity(req, req.user))
     super(req, res, id)
+    
+  getNamesByIds: (req, res) ->
+    ids = req.query.ids or req.body.ids
+    ids = ids.split(',') if _.isString ids
+    ids = _.uniq ids
+    
+    makeFunc = (id) ->
+      (callback) ->
+        User.findById(id, {name:1}).exec (err, document) ->
+          return done(err) if err
+          callback(null, document?.get('name') or '')
+          
+    funcs = {}
+    for id in ids
+      return errors.badInput(res, "Given an invalid id: #{id}") unless Handler.isID(id)
+      funcs[id] = makeFunc(id)
+    
+    async.parallel funcs, (err, results) ->
+      return errors.serverError err if err
+      res.send results
+      res.end()
 
   post: (req, res) ->
     return @sendBadInputError(res, 'No input.') if _.isEmpty(req.body)
@@ -123,6 +146,7 @@ UserHandler = class UserHandler extends Handler
   getByRelationship: (req, res, args...) ->
     return @agreeToCLA(req, res) if args[1] is 'agreeToCLA'
     return @avatar(req, res, args[0]) if args[1] is 'avatar'
+    return @getNamesByIds(req, res) if args[1] is 'names'
     return @sendNotFoundError(res)
 
   agreeToCLA: (req, res) ->