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Contents
module Workarea
module Inventory
# This class represents a collection of {Sku}s. It is more
# performant because it does a single query to grab the
# {Sku}s instead of N+1.
#
class Collection
include Enumerable
attr_reader :skus
delegate :any?, :empty?, :each, :size, :length, to: :records
def initialize(skus, records = nil)
@skus = skus
@records = records
end
def self.statuses
Workarea.config.inventory_status_calculators.map do |klass|
klass.demodulize.underscore
end
end
statuses.each do |status_name|
define_method "#{status_name}?" do
status.to_s == status_name
end
end
# The total number available to sell
#
# return [Integer]
#
def available_to_sell
records.map(&:available_to_sell).sum
end
# If the product has any puchasable inventory
#
# return [Boolean]
#
def purchasable?(quantity = 1)
quantity <= available_to_sell
end
# Grab the specific {Sku} for a SKU.
# Returns a new, unpersisted {Sku} if one does not exist.
#
# @param sku [String]
# @return [Sku]
#
def for_sku(sku)
records.detect { |r| r.id == sku }
end
def policies
records.map(&:policy)
end
# Get the status of this collection of inventory skus.
#
# @return [Symbol]
#
def status
calculators = Workarea.config.inventory_status_calculators.map(&:constantize)
StatusCalculator.new(calculators, self).result
end
def records
@records ||=
begin
existing = Sku.in(id: skus).to_a
missing_skus = skus - existing.map(&:id)
existing + missing_skus.map { |sku| Sku.new(id: sku ) }
end
end
end
end
end
Version data entries
28 entries across 28 versions & 1 rubygems