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79 lines
2.8 KiB
CoffeeScript
79 lines
2.8 KiB
CoffeeScript
_ = require("underscore")
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async = require("async")
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Settings = require('settings-sharelatex')
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logger = require("logger-sharelatex")
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redis = require("redis-sharelatex")
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rclient = redis.createClient(Settings.redis.web)
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ONE_HOUR_IN_S = 60 * 60
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ONE_DAY_IN_S = ONE_HOUR_IN_S * 24
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FOUR_DAYS_IN_S = ONE_DAY_IN_S * 4
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USER_TIMEOUT_IN_S = ONE_HOUR_IN_S / 4
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buildProjectSetKey = (project_id)-> return "clients_in_project:#{project_id}"
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buildUserKey = (project_id, client_id)-> return "connected_user:#{project_id}:#{client_id}"
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module.exports =
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# Use the same method for when a user connects, and when a user sends a cursor
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# update. This way we don't care if the connected_user key has expired when
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# we receive a cursor update.
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updateUserPosition: (project_id, client_id, user, cursorData, callback = (err)->)->
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logger.log project_id:project_id, client_id:client_id, "marking user as connected"
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multi = rclient.multi()
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multi.sadd buildProjectSetKey(project_id), client_id
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multi.expire buildProjectSetKey(project_id), FOUR_DAYS_IN_S
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multi.hset buildUserKey(project_id, client_id), "last_updated_at", Date.now()
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multi.hset buildUserKey(project_id, client_id), "user_id", user._id
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multi.hset buildUserKey(project_id, client_id), "first_name", user.first_name
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multi.hset buildUserKey(project_id, client_id), "last_name", user.last_name
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multi.hset buildUserKey(project_id, client_id), "email", user.email
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if cursorData?
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multi.hset buildUserKey(project_id, client_id), "cursorData", JSON.stringify(cursorData)
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multi.expire buildUserKey(project_id, client_id), USER_TIMEOUT_IN_S
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multi.exec (err)->
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if err?
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logger.err err:err, project_id:project_id, client_id:client_id, "problem marking user as connected"
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callback(err)
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markUserAsDisconnected: (project_id, client_id, callback)->
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logger.log project_id:project_id, client_id:client_id, "marking user as disconnected"
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multi = rclient.multi()
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multi.srem buildProjectSetKey(project_id), client_id
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multi.expire buildProjectSetKey(project_id), FOUR_DAYS_IN_S
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multi.del buildUserKey(project_id, client_id)
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multi.exec callback
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_getConnectedUser: (project_id, client_id, callback)->
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rclient.hgetall buildUserKey(project_id, client_id), (err, result)->
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if !result?
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result =
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connected : false
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client_id:client_id
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else
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result.connected = true
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result.client_id = client_id
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if result.cursorData?
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result.cursorData = JSON.parse(result.cursorData)
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callback err, result
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getConnectedUsers: (project_id, callback)->
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self = @
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rclient.smembers buildProjectSetKey(project_id), (err, results)->
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jobs = results.map (client_id)->
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(cb)->
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self._getConnectedUser(project_id, client_id, cb)
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async.series jobs, (err, users)->
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users = _.filter users, (user)->
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user.connected
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callback err, users
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