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642134da79
ioredis returns a blank object, {}, if there is no key with hgetall.
Previously, node-redis returned nil. So we need to check for a blank
object as well as a nil object.
80 lines
3 KiB
CoffeeScript
80 lines
3 KiB
CoffeeScript
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.realtime)
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Keys = Settings.redis.realtime.key_schema
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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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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 joined or connected"
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multi = rclient.multi()
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multi.sadd Keys.clientsInProject({project_id}), client_id
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multi.expire Keys.clientsInProject({project_id}), FOUR_DAYS_IN_S
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multi.hset Keys.connectedUser({project_id, client_id}), "last_updated_at", Date.now()
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multi.hset Keys.connectedUser({project_id, client_id}), "user_id", user._id
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multi.hset Keys.connectedUser({project_id, client_id}), "first_name", user.first_name or ""
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multi.hset Keys.connectedUser({project_id, client_id}), "last_name", user.last_name or ""
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multi.hset Keys.connectedUser({project_id, client_id}), "email", user.email or ""
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if cursorData?
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multi.hset Keys.connectedUser({project_id, client_id}), "cursorData", JSON.stringify(cursorData)
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multi.expire Keys.connectedUser({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 Keys.clientsInProject({project_id}), client_id
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multi.expire Keys.clientsInProject({project_id}), FOUR_DAYS_IN_S
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multi.del Keys.connectedUser({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 Keys.connectedUser({project_id, client_id}), (err, result)->
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if !result? or Object.keys(result).length == 0
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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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try
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result.cursorData = JSON.parse(result.cursorData)
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catch e
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logger.error {err: e, project_id, client_id, cursorData: result.cursorData}, "error parsing cursorData JSON"
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return callback e
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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 Keys.clientsInProject({project_id}), (err, results)->
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return callback(err) if err?
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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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return callback(err) if err?
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users = users.filter (user) ->
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user?.connected
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callback null, users
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