discourse/lib/rate_limiter/on_create_record.rb

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2013-02-05 14:16:51 -05:00
class RateLimiter
# A mixin we can use on ActiveRecord Models to automatically rate limit them
# based on a SiteSetting.
#
# It expects a SiteSetting called `rate_limit_create_{model_name}` where
# `model_name` is the class name of your model, underscored.
#
module OnCreateRecord
# Over write to define your own rate limiter
def default_rate_limiter
return @rate_limiter if @rate_limiter.present?
limit_key = "create_#{self.class.name.underscore}"
max_setting = SiteSetting.send("rate_limit_#{limit_key}")
@rate_limiter = RateLimiter.new(user, limit_key, 1, max_setting)
end
def self.included(base)
base.extend(ClassMethods)
end
module ClassMethods
def rate_limit(limiter_method=nil)
limiter_method = limiter_method || :default_rate_limiter
self.after_create do
rate_limiter = send(limiter_method)
return unless rate_limiter.present?
rate_limiter.performed!
@performed ||= {}
@performed[limiter_method] = true
end
self.after_destroy do
rate_limiter = send(limiter_method)
return unless rate_limiter.present?
rate_limiter.rollback!
end
self.after_rollback do
rate_limiter = send(limiter_method)
return unless rate_limiter.present?
if @performed.present? and @performed[limiter_method]
rate_limiter.rollback!
@performed[limiter_method] = false
end
end
end
end
end
end