32 lines
1.0 KiB
CoffeeScript
32 lines
1.0 KiB
CoffeeScript
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schedule = require('node-schedule')
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ratings = require('./ratings')
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redis = require('./redis')
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DEFAULT_RATING = ratings.algorithm.createPlayer().rating
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@createScheduler = ->
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jobs = []
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# Artificial Elo decay per day
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jobs.push schedule.scheduleJob hour: 0, minute: 0, second: 0, ->
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# TODO: Turn into a lua script
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job = this
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multi = redis.multi()
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multi = multi.sdiff('users:rated', 'users:active')
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multi = multi.del('users:active')
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multi.exec (err, results) ->
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throw new Error(err) if err
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[ids, didDelete] = results
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return job.emit('finished') if ids.length == 0
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ratings.getRatings ids, (err, oldRatings) ->
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throw new Error(err) if err
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newRatings = oldRatings.map (rating) ->
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if rating < DEFAULT_RATING
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rating
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else
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Math.max(rating - ratings.DECAY_AMOUNT, DEFAULT_RATING)
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ratings.setRatings ids, newRatings, (err) ->
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throw new Error(err) if err
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job.emit('finished')
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return jobs
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