discourse/app/models/view.rb

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require 'ipaddr'
class View < ActiveRecord::Base
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belongs_to :parent, polymorphic: true
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belongs_to :user
validates_presence_of :parent_type, :parent_id, :ip, :viewed_at
# TODO: This could happen asyncronously
def self.create_for(parent, ip, user=nil)
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# Only store a view once per day per thing per user per ip
redis_key = "view:#{parent.class.name}:#{parent.id}:#{Date.today.to_s}"
if user.present?
redis_key << ":user-#{user.id}"
else
redis_key << ":ip-#{ip}"
end
if $redis.setnx(redis_key, "1")
$redis.expire(redis_key, 1.day.to_i)
View.transaction do
View.create(parent: parent, ip: IPAddr.new(ip).to_i, viewed_at: Date.today, user: user)
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# Update the views count in the parent, if it exists.
if parent.respond_to?(:views)
parent.class.update_all 'views = views + 1', id: parent.id
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end
end
end
end
end