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Contents
module Neuron
module Client
module ZoneCalculations
# This module expects the following methods to be defined:
#
# ad_links (Hash, keys are ad IDs, values are a sub-hash: {'priority' => p, 'weight' => w})
# find_ad(ad_id) (nil, or an object that responds to :active? and :pressure)
def ads_by_priority
calculate_ads_by_priority
end
def calculate_ads_by_priority
entries = {}
ad_links.each do |ad_id, link|
next unless ad = find_ad(ad_id)
pressure = ad.active? ? ad.pressure : nil
next if pressure.nil?
weight = link['weight'].to_f
priority = link['priority'].to_f
entries[priority] ||= []
entries[priority] << [ad_id, weighted_pressure(weight, pressure)]
end
entries.sort_by do |priority, entry|
priority
end.map do |priority, entry|
entry.sort_by(&:first)
end
end
private
def weighted_pressure(weight, pressure)
[( [weight, 0.0].max * [pressure, 1.0].max ), 1.0].max.to_f
end
end
end
end
Version data entries
3 entries across 3 versions & 1 rubygems