config = require '../../server_config' log = require 'winston' mongoose = require 'mongoose' async = require 'async' errors = require '../commons/errors' aws = require 'aws-sdk' db = require './../routes/db' mongoose = require 'mongoose' queues = require '../commons/queue' LevelSession = require '../levels/sessions/LevelSession' Level = require '../levels/Level' User = require '../users/User' TaskLog = require './task/ScoringTask' bayes = new (require 'bayesian-battle')() scoringTaskQueue = undefined scoringTaskTimeoutInSeconds = 240 module.exports.setup = (app) -> connectToScoringQueue() connectToScoringQueue = -> queues.initializeQueueClient -> queues.queueClient.registerQueue "scoring", {}, (error,data) -> if error? then throw new Error "There was an error registering the scoring queue: #{error}" scoringTaskQueue = data log.info "Connected to scoring task queue!" module.exports.messagesInQueueCount = (req, res) -> scoringTaskQueue.totalMessagesInQueue (err, count) -> if err? then return errors.serverError res, "There was an issue finding the Mongoose count:#{err}" response = String(count) res.send(response) res.end() module.exports.addPairwiseTaskToQueueFromRequest = (req, res) -> taskPair = req.body.sessions addPairwiseTaskToQueue req.body.sessions, (err, success) -> if err? then return errors.serverError res, "There was an error adding pairwise tasks: #{err}" sendResponseObject req, res, {"message":"All task pairs were succesfully sent to the queue"} addPairwiseTaskToQueue = (taskPair, cb) -> LevelSession.findOne(_id:taskPair[0]).lean().exec (err, firstSession) => if err? then return cb err LevelSession.find(_id:taskPair[1]).exec (err, secondSession) => if err? then return cb err try taskPairs = generateTaskPairs(secondSession, firstSession) catch e if e then return cb e sendEachTaskPairToTheQueue taskPairs, (taskPairError) -> if taskPairError? then return cb taskPairError cb null module.exports.resimulateAllSessions = (req, res) -> unless isUserAdmin req then return errors.unauthorized res, "Unauthorized. Even if you are authorized, you shouldn't do this" originalLevelID = req.body.originalLevelID levelMajorVersion = parseInt(req.body.levelMajorVersion) findParameters = submitted: true level: original: originalLevelID majorVersion: levelMajorVersion query = LevelSession .find(findParameters) .lean() query.exec (err, result) -> if err? then return errors.serverError res, err result = _.sample result, 10 async.each result, resimulateSession.bind(@,originalLevelID,levelMajorVersion), (err) -> if err? then return errors.serverError res, err sendResponseObject req, res, {"message":"All task pairs were succesfully sent to the queue"} resimulateSession = (originalLevelID, levelMajorVersion, session, cb) => sessionUpdateObject = submitted: true submitDate: new Date() meanStrength: 25 standardDeviation: 25/3 totalScore: 10 numberOfWinsAndTies: 0 numberOfLosses: 0 isRanking: true LevelSession.update {_id: session._id}, sessionUpdateObject, (err, updatedSession) -> if err? then return cb err, null opposingTeam = calculateOpposingTeam(session.team) fetchInitialSessionsToRankAgainst levelMajorVersion, originalLevelID, opposingTeam, (err, sessionsToRankAgainst) -> if err? then return cb err, null taskPairs = generateTaskPairs(sessionsToRankAgainst, session) sendEachTaskPairToTheQueue taskPairs, (taskPairError) -> if taskPairError? then return cb taskPairError, null cb null module.exports.getTwoGames = (req, res) -> #if userIsAnonymous req then return errors.unauthorized(res, "You need to be logged in to get games.") humansGameID = req.body.humansGameID ogresGameID = req.body.ogresGameID unless ogresGameID and humansGameID #fetch random games here queryParams = "levelID":"greed" "submitted":true "team":"humans" selection = "team totalScore transpiledCode teamSpells levelID creatorName creator" LevelSession.count queryParams, (err, numberOfHumans) => if err? then return errors.serverError(res, "Couldn't get the number of human games") ogreCountParams = "levelID": "greed" "submitted":true "team":"ogres" LevelSession.count ogreCountParams, (err, numberOfOgres) => if err? then return errors.serverError(res, "Couldnt' get the number of ogre games") query = LevelSession .find(queryParams) .limit(1) .select(selection) .skip(Math.floor(Math.random()*numberOfHumans)) .lean() query.exec (err, randomSession) => if err? then return errors.serverError(res, "Couldn't select a random session!") randomSession = randomSession[0] queryParams = "levelID":"greed" "submitted":true "team": "ogres" query = LevelSession .find(queryParams) .limit(1) .select(selection) .skip(Math.floor(Math.random()*numberOfOgres)) .lean() query.exec (err, otherSession) => if err? then return errors.serverError(res, "Couldnt' select the other random session!") otherSession = otherSession[0] taskObject = "messageGenerated": Date.now() "sessions": [] for session in [randomSession, otherSession] sessionInformation = "sessionID": session._id "team": session.team ? "No team" "transpiledCode": session.transpiledCode "teamSpells": session.teamSpells ? {} "levelID": session.levelID "creatorName": session.creatorName "creator": session.creator "totalScore": session.totalScore taskObject.sessions.push sessionInformation sendResponseObject req, res, taskObject else LevelSession.findOne(_id: humansGameID).lean().exec (err, humanSession) => if err? then return errors.serverError(res, "Couldn't find the human game") LevelSession.findOne(_id: ogresGameID).lean().exec (err, ogreSession) => if err? then return errors.serverError(res, "Couldn't find the ogre game") taskObject = "messageGenerated": Date.now() "sessions": [] for session in [humanSession, ogreSession] sessionInformation = "sessionID": session._id "team": session.team ? "No team" "transpiledCode": session.transpiledCode "teamSpells": session.teamSpells ? {} "levelID": session.levelID taskObject.sessions.push sessionInformation sendResponseObject req, res, taskObject module.exports.recordTwoGames = (req, res) -> @clientResponseObject = req.body async.waterfall [ fetchLevelSession.bind(@) updateSessions.bind(@) indexNewScoreArray.bind(@) addMatchToSessions.bind(@) updateUserSimulationCounts.bind(@, req.user._id) ], (err, successMessageObject) -> if err? then return errors.serverError res, "There was an error recording the single game:#{err}" sendResponseObject req, res, {"message":"The single game was submitted successfully!"} module.exports.createNewTask = (req, res) -> requestSessionID = req.body.session originalLevelID = req.body.originalLevelID currentLevelID = req.body.levelID transpiledCode = req.body.transpiledCode requestLevelMajorVersion = parseInt(req.body.levelMajorVersion) async.waterfall [ validatePermissions.bind(@,req,requestSessionID) fetchAndVerifyLevelType.bind(@,currentLevelID) fetchSessionObjectToSubmit.bind(@, requestSessionID) updateSessionToSubmit.bind(@, transpiledCode) fetchInitialSessionsToRankAgainst.bind(@, requestLevelMajorVersion, originalLevelID) generateAndSendTaskPairsToTheQueue ], (err, successMessageObject) -> if err? then return errors.serverError res, "There was an error submitting the game to the queue:#{err}" sendResponseObject req, res, successMessageObject validatePermissions = (req,sessionID, callback) -> if isUserAnonymous req then return callback "You are unauthorized to submit that game to the simulator" if isUserAdmin req then return callback null findParameters = _id: sessionID selectString = 'creator submittedCode code' query = LevelSession .findOne(findParameters) .select(selectString) .lean() query.exec (err, retrievedSession) -> if err? then return callback err userHasPermissionToSubmitCode = retrievedSession.creator is req.user?.id and not _.isEqual(retrievedSession.code, retrievedSession.submittedCode) unless userHasPermissionToSubmitCode then return callback "You are unauthorized to submit that game to the simulator" callback null fetchAndVerifyLevelType = (levelID, cb) -> findParameters = _id: levelID selectString = 'type' query = Level .findOne(findParameters) .select(selectString) .lean() query.exec (err, levelWithType) -> if err? then return cb err if not levelWithType.type or levelWithType.type isnt "ladder" then return cb "Level isn't of type 'ladder'" cb null fetchSessionObjectToSubmit = (sessionID, callback) -> findParameters = _id: sessionID selectString = 'team code' query = LevelSession .findOne(findParameters) .select(selectString) query.exec (err, session) -> callback err, session?.toObject() updateSessionToSubmit = (transpiledCode, sessionToUpdate, callback) -> sessionUpdateObject = submitted: true submittedCode: sessionToUpdate.code transpiledCode: transpiledCode submitDate: new Date() meanStrength: 25 standardDeviation: 25/3 totalScore: 10 numberOfWinsAndTies: 0 numberOfLosses: 0 isRanking: true LevelSession.update {_id: sessionToUpdate._id}, sessionUpdateObject, (err, result) -> callback err, sessionToUpdate fetchInitialSessionsToRankAgainst = (levelMajorVersion, levelID, submittedSession, callback) -> opposingTeam = calculateOpposingTeam(submittedSession.team) findParameters = "level.original": levelID "level.majorVersion": levelMajorVersion submitted: true submittedCode: $exists: true team: opposingTeam sortParameters = totalScore: 1 limitNumber = 1 query = LevelSession.aggregate [ {$match: findParameters} {$sort: sortParameters} {$limit: limitNumber} ] query.exec (err, sessionToRankAgainst) -> callback err, sessionToRankAgainst, submittedSession generateAndSendTaskPairsToTheQueue = (sessionToRankAgainst,submittedSession, callback) -> taskPairs = generateTaskPairs(sessionToRankAgainst, submittedSession) sendEachTaskPairToTheQueue taskPairs, (taskPairError) -> if taskPairError? then return callback taskPairError #console.log "Sent task pairs to the queue!" #console.log taskPairs callback null, {"message": "All task pairs were succesfully sent to the queue"} module.exports.dispatchTaskToConsumer = (req, res) -> async.waterfall [ checkSimulationPermissions.bind(@,req) receiveMessageFromSimulationQueue changeMessageVisibilityTimeout parseTaskQueueMessage constructTaskObject constructTaskLogObject.bind(@, getUserIDFromRequest(req)) processTaskObject ], (err, taskObjectToSend) -> if err? if typeof err is "string" and err.indexOf "No more games in the queue" isnt -1 res.send(204, "No games to score.") return res.end() else return errors.serverError res, "There was an error dispatching the task: #{err}" sendResponseObject req, res, taskObjectToSend checkSimulationPermissions = (req, cb) -> if isUserAnonymous req cb "You need to be logged in to simulate games" else cb null receiveMessageFromSimulationQueue = (cb) -> scoringTaskQueue.receiveMessage (err, message) -> if err? then return cb "No more games in the queue, error:#{err}" if messageIsInvalid(message) then return cb "Message received from queue is invalid" cb null, message changeMessageVisibilityTimeout = (message, cb) -> message.changeMessageVisibilityTimeout scoringTaskTimeoutInSeconds, (err) -> cb err, message parseTaskQueueMessage = (message,cb) -> try if typeof message.getBody() is "object" messageBody = message.getBody() else messageBody = JSON.parse message.getBody() cb null, messageBody, message catch e cb "There was an error parsing the task.Error: #{e}" constructTaskObject = (taskMessageBody, message, callback) -> async.map taskMessageBody.sessions, getSessionInformation, (err, sessions) -> if err? then return callback err taskObject = "messageGenerated": Date.now() "sessions": [] for session in sessions sessionInformation = "sessionID": session._id "submitDate": session.submitDate "team": session.team ? "No team" "transpiledCode": session.transpiledCode "teamSpells": session.teamSpells ? {} "levelID": session.levelID "creator": session.creator "creatorName":session.creatorName "totalScore": session.totalScore taskObject.sessions.push sessionInformation callback null, taskObject, message constructTaskLogObject = (calculatorUserID, taskObject, message, callback) -> taskLogObject = new TaskLog "createdAt": new Date() "calculator":calculatorUserID "sentDate": Date.now() "messageIdentifierString":message.getReceiptHandle() taskLogObject.save (err) -> callback err, taskObject, taskLogObject, message processTaskObject = (taskObject,taskLogObject, message, cb) -> taskObject.taskID = taskLogObject._id taskObject.receiptHandle = message.getReceiptHandle() cb null, taskObject getSessionInformation = (sessionIDString, callback) -> findParameters = _id: sessionIDString selectString = 'submitDate team submittedCode teamSpells levelID creator creatorName transpiledCode totalScore' query = LevelSession .findOne(findParameters) .select(selectString) .lean() query.exec (err, session) -> if err? then return callback err, {"error":"There was an error retrieving the session."} callback null, session module.exports.processTaskResult = (req, res) -> originalSessionID = req.body?.originalSessionID try async.waterfall [ verifyClientResponse.bind(@,req.body) fetchTaskLog.bind(@) checkTaskLog.bind(@) deleteQueueMessage.bind(@) fetchLevelSession.bind(@) checkSubmissionDate.bind(@) logTaskComputation.bind(@) updateSessions.bind(@) indexNewScoreArray.bind(@) addMatchToSessions.bind(@) updateUserSimulationCounts.bind(@, req.user._id) determineIfSessionShouldContinueAndUpdateLog.bind(@) findNearestBetterSessionID.bind(@) addNewSessionsToQueue.bind(@) ], (err, results) -> if err is "shouldn't continue" markSessionAsDoneRanking originalSessionID, (err) -> if err? then return sendResponseObject req, res, {"error":"There was an error marking the session as done ranking"} sendResponseObject req, res, {"message":"The scores were updated successfully, person lost so no more games are being inserted!"} else if err is "no session was found" markSessionAsDoneRanking originalSessionID, (err) -> if err? then return sendResponseObject req, res, {"error":"There was an error marking the session as done ranking"} sendResponseObject req, res, {"message":"There were no more games to rank (game is at top)!"} else if err? errors.serverError res, "There was an error:#{err}" else sendResponseObject req, res, {"message":"The scores were updated successfully and more games were sent to the queue!"} catch e errors.serverError res, "There was an error processing the task result!" verifyClientResponse = (responseObject, callback) -> #TODO: better verification if typeof responseObject isnt "object" or responseObject?.originalSessionID?.length isnt 24 callback "The response to that query is required to be a JSON object." else @clientResponseObject = responseObject #log.info "Verified client response!" callback null, responseObject fetchTaskLog = (responseObject, callback) -> findParameters = _id: responseObject.taskID query = TaskLog .findOne(findParameters) query.exec (err, taskLog) => @taskLog = taskLog #log.info "Fetched task log!" callback err, taskLog.toObject() checkTaskLog = (taskLog, callback) -> if taskLog.calculationTimeMS then return callback "That computational task has already been performed" if hasTaskTimedOut taskLog.sentDate then return callback "The task has timed out" #log.info "Checked task log" callback null deleteQueueMessage = (callback) -> scoringTaskQueue.deleteMessage @clientResponseObject.receiptHandle, (err) -> #log.info "Deleted queue message" callback err fetchLevelSession = (callback) -> findParameters = _id: @clientResponseObject.originalSessionID query = LevelSession .findOne(findParameters) .lean() query.exec (err, session) => @levelSession = session #log.info "Fetched level session" callback err checkSubmissionDate = (callback) -> supposedSubmissionDate = new Date(@clientResponseObject.sessions[0].submitDate) if Number(supposedSubmissionDate) isnt Number(@levelSession.submitDate) callback "The game has been resubmitted. Removing from queue..." else #log.info "Checked submission date" callback null logTaskComputation = (callback) -> @taskLog.set('calculationTimeMS',@clientResponseObject.calculationTimeMS) @taskLog.set('sessions') @taskLog.calculationTimeMS = @clientResponseObject.calculationTimeMS @taskLog.sessions = @clientResponseObject.sessions @taskLog.save (err, saved) -> #log.info "Logged task computation" callback err updateSessions = (callback) -> sessionIDs = _.pluck @clientResponseObject.sessions, 'sessionID' async.map sessionIDs, retrieveOldSessionData, (err, oldScores) => if err? then callback err, {"error": "There was an error retrieving the old scores"} oldScoreArray = _.toArray putRankingFromMetricsIntoScoreObject @clientResponseObject, oldScores newScoreArray = bayes.updatePlayerSkills oldScoreArray saveNewScoresToDatabase newScoreArray, callback saveNewScoresToDatabase = (newScoreArray, callback) -> async.eachSeries newScoreArray, updateScoreInSession, (err) -> #log.info "Saved new scores to database" callback err,newScoreArray updateScoreInSession = (scoreObject,callback) -> LevelSession.findOne {"_id": scoreObject.id}, (err, session) -> if err? then return callback err, null session = session.toObject() newTotalScore = scoreObject.meanStrength - 1.8 * scoreObject.standardDeviation scoreHistoryAddition = [Date.now(), newTotalScore] updateObject = meanStrength: scoreObject.meanStrength standardDeviation: scoreObject.standardDeviation totalScore: newTotalScore $push: {scoreHistory: {$each: [scoreHistoryAddition], $slice: -1000}} LevelSession.update {"_id": scoreObject.id}, updateObject, callback #log.info "New total score for session #{scoreObject.id} is #{updateObject.totalScore}" indexNewScoreArray = (newScoreArray, callback) -> newScoresObject = _.indexBy newScoreArray, 'id' @newScoresObject = newScoresObject callback null, newScoresObject addMatchToSessions = (newScoreObject, callback) -> matchObject = {} matchObject.date = new Date() matchObject.opponents = {} for session in @clientResponseObject.sessions sessionID = session.sessionID matchObject.opponents[sessionID] = {} matchObject.opponents[sessionID].sessionID = sessionID matchObject.opponents[sessionID].userID = session.creator matchObject.opponents[sessionID].name = session.name matchObject.opponents[sessionID].totalScore = session.totalScore matchObject.opponents[sessionID].metrics = {} matchObject.opponents[sessionID].metrics.rank = Number(newScoreObject[sessionID]?.gameRanking ? 0) #log.info "Match object computed, result: #{matchObject}" #log.info "Writing match object to database..." #use bind with async to do the writes sessionIDs = _.pluck @clientResponseObject.sessions, 'sessionID' async.each sessionIDs, updateMatchesInSession.bind(@,matchObject), (err) -> callback err updateMatchesInSession = (matchObject, sessionID, callback) -> currentMatchObject = {} currentMatchObject.date = matchObject.date currentMatchObject.metrics = matchObject.opponents[sessionID].metrics opponentsClone = _.cloneDeep matchObject.opponents opponentsClone = _.omit opponentsClone, sessionID opponentsArray = _.toArray opponentsClone currentMatchObject.opponents = opponentsArray LevelSession.findOne {"_id": sessionID}, (err, session) -> session = session.toObject() currentMatchObject.playtime = session.playtime ? 0 sessionUpdateObject = $push: {matches: {$each: [currentMatchObject], $slice: -200}} #log.info "Updating session #{sessionID}" LevelSession.update {"_id":sessionID}, sessionUpdateObject, callback updateUserSimulationCounts = (reqUserID,callback) -> incrementUserSimulationCount reqUserID, 'simulatedBy', (err) => if err? then return callback err incrementUserSimulationCount @levelSession.creator, 'simulatedFor', callback incrementUserSimulationCount = (userID, type, callback) => inc = {} inc[type] = 1 User.update {_id: userID}, {$inc: inc}, (err, affected) -> log.error "Error incrementing #{type} for #{userID}: #{err}" if err callback err determineIfSessionShouldContinueAndUpdateLog = (cb) -> sessionID = @clientResponseObject.originalSessionID sessionRank = parseInt @clientResponseObject.originalSessionRank queryParameters = _id: sessionID updateParameters = "$inc": {} if sessionRank is 0 updateParameters["$inc"] = {numberOfWinsAndTies: 1} else updateParameters["$inc"] = {numberOfLosses: 1} LevelSession.findOneAndUpdate queryParameters, updateParameters,{select: 'numberOfWinsAndTies numberOfLosses'}, (err, updatedSession) -> if err? then return cb err, updatedSession updatedSession = updatedSession.toObject() totalNumberOfGamesPlayed = updatedSession.numberOfWinsAndTies + updatedSession.numberOfLosses if totalNumberOfGamesPlayed < 10 #console.log "Number of games played is less than 10, continuing..." cb null else ratio = (updatedSession.numberOfLosses) / (totalNumberOfGamesPlayed) if ratio > 0.33 cb "shouldn't continue" console.log "Ratio(#{ratio}) is bad, ending simulation" else #console.log "Ratio(#{ratio}) is good, so continuing simulations" cb null findNearestBetterSessionID = (cb) -> levelOriginalID = @levelSession.level.original levelMajorVersion = @levelSession.level.majorVersion sessionID = @clientResponseObject.originalSessionID sessionTotalScore = @newScoresObject[sessionID].totalScore opponentSessionID = _.pull(_.keys(@newScoresObject), sessionID) opponentSessionTotalScore = @newScoresObject[opponentSessionID].totalScore opposingTeam = calculateOpposingTeam(@clientResponseObject.originalSessionTeam) retrieveAllOpponentSessionIDs sessionID, (err, opponentSessionIDs) -> if err? then return cb err, null queryParameters = totalScore: $gt: opponentSessionTotalScore _id: $nin: opponentSessionIDs "level.original": levelOriginalID "level.majorVersion": levelMajorVersion submitted: true submittedCode: $exists: true team: opposingTeam if opponentSessionTotalScore < 30 # Don't play a ton of matches at low scores--skip some in proportion to how close to 30 we are. # TODO: this could be made a lot more flexible. queryParameters["totalScore"]["$gt"] = opponentSessionTotalScore + 2 * (30 - opponentSessionTotalScore) / 20 limitNumber = 1 sortParameters = totalScore: 1 selectString = '_id totalScore' query = LevelSession.findOne(queryParameters) .sort(sortParameters) .limit(limitNumber) .select(selectString) .lean() #console.log "Finding session with score near #{opponentSessionTotalScore}" query.exec (err, session) -> if err? then return cb err, session unless session then return cb "no session was found" #console.log "Found session with score #{session.totalScore}" cb err, session._id retrieveAllOpponentSessionIDs = (sessionID, cb) -> query = LevelSession.findOne({"_id":sessionID}) .select('matches.opponents.sessionID matches.date submitDate') .lean() query.exec (err, session) -> if err? then return cb err, null opponentSessionIDs = (match.opponents[0].sessionID for match in session.matches when match.date > session.submitDate) cb err, opponentSessionIDs calculateOpposingTeam = (sessionTeam) -> teams = ['ogres','humans'] opposingTeams = _.pull teams, sessionTeam return opposingTeams[0] addNewSessionsToQueue = (sessionID, callback) -> sessions = [@clientResponseObject.originalSessionID, sessionID] addPairwiseTaskToQueue sessions, callback messageIsInvalid = (message) -> (not message?) or message.isEmpty() sendEachTaskPairToTheQueue = (taskPairs, callback) -> async.each taskPairs, sendTaskPairToQueue, callback generateTaskPairs = (submittedSessions, sessionToScore) -> taskPairs = [] for session in submittedSessions if session.toObject? session = session.toObject() teams = ['ogres','humans'] opposingTeams = _.pull teams, sessionToScore.team if String(session._id) isnt String(sessionToScore._id) and session.team in opposingTeams #console.log "Adding game to taskPairs!" taskPairs.push [sessionToScore._id,String session._id] return taskPairs sendTaskPairToQueue = (taskPair, callback) -> scoringTaskQueue.sendMessage {sessions: taskPair}, 5, (err,data) -> callback? err,data getUserIDFromRequest = (req) -> if req.user? then return req.user._id else return null isUserAnonymous = (req) -> if req.user? then return req.user.get('anonymous') else return true isUserAdmin = (req) -> return Boolean(req.user?.isAdmin()) sendResponseObject = (req,res,object) -> res.setHeader('Content-Type', 'application/json') res.send(object) res.end() hasTaskTimedOut = (taskSentTimestamp) -> taskSentTimestamp + scoringTaskTimeoutInSeconds * 1000 < Date.now() handleTimedOutTask = (req, res, taskBody) -> errors.clientTimeout res, "The results weren't provided within the timeout" putRankingFromMetricsIntoScoreObject = (taskObject,scoreObject) -> scoreObject = _.indexBy scoreObject, 'id' try scoreObject[session.sessionID].gameRanking = session.metrics.rank for session in taskObject.sessions catch e console.log "There was an error setting gameRanking for session #{JSON.stringify session}" return scoreObject retrieveOldSessionData = (sessionID, callback) -> LevelSession.findOne {"_id":sessionID}, (err, session) -> return callback err, {"error":"There was an error retrieving the session."} if err? session = session.toObject() oldScoreObject = "standardDeviation":session.standardDeviation ? 25/3 "meanStrength":session.meanStrength ? 25 "totalScore":session.totalScore ? (25 - 1.8*(25/3)) "id": sessionID callback err, oldScoreObject markSessionAsDoneRanking = (sessionID, cb) -> #console.log "Marking session as done ranking..." LevelSession.update {"_id":sessionID}, {"isRanking":false}, cb