BattleSim/server/alts.coffee

69 lines
2.3 KiB
CoffeeScript
Raw Normal View History

2016-02-01 22:19:30 +00:00
redis = require './redis'
ALT_LIMIT = 5
ALTS_KEY = "alts"
MAX_ALT_LENGTH = 15
# NOTE: Alt names should not be lowercased, but user ids should be.
# Runs basic username validation for alts
@isAltNameValid = (altName) ->
return false if !altName
altName = altName.trim()
return false if altName.length == 0 || altName.length > MAX_ALT_LENGTH
return false if altName.match(/\ \ /)
return false if not altName.match(/^[-_ a-zA-Z0-9]+$/)
return true
# Retrieves a list of alts registered to the user
# next is a callback with args (error, altsList)
@listUserAlts = (userId, next) ->
userId = String(userId).toLowerCase()
redis.lrange "#{userId}:alts", 0, -1, (err, alts) ->
return next(err) if err
next(null, alts)
# Creates an alt for the user with the given id
# next is a callback with args (error, success)
# TODO: Should this use a transaction?
@createAlt = (userId, altName, next) ->
userId = String(userId).toLowerCase()
altListKey = "#{userId}:alts"
redis.llen altListKey, (err, amount) ->
return next(err) if err
if amount >= ALT_LIMIT
return next(new Error("You have run out of alts. You cannot create another one."))
redis.hsetnx ALTS_KEY, altName, userId, (err, success) ->
return next(err) if err
return next(new Error("This alt name is already in use")) if not success
# If we got this far, adding the alt succeeded
# Add it to the list of user's alts, and then call next
redis.rpush altListKey, altName, ->
next(null, true)
# Checks if the user owns a particular alt name.
# Always returns true if altName is null (meaning no alt)
@isAltOwnedBy = (userId, altName, next) ->
return next(undefined, true) if not altName
userId = String(userId).toLowerCase()
redis.hget ALTS_KEY, altName, (err, assignedUserId) ->
return next(err) if err
next(null, assignedUserId == userId)
@getAltOwner = (altName, next) ->
redis.hget ALTS_KEY, altName, (err, assignedUserId) ->
return next(err) if err
return next(null, assignedUserId)
# Generates a unique id for a given id + altName combination.
# If altName is null, the original id is returned
@uniqueId = (id, altName) ->
return id if not altName
"#{id}:#{altName}"
# The inverse of uniqueId
@getIdOwner = (uniqueId) ->
uniqueId.split(':')[0]