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# This class is responsible for taking SubscriptionLineItems and building
# them into Spree::LineItems which can be added to an order
module SolidusSubscriptions
class LineItemBuilder
attr_reader :subscription_line_items
# Get a new instance of a LineItemBuilder
#
# @param subscription_line_items[Array<SolidusSubscriptions::LineItem>] The
# subscription line item to be converted into a Spree::LineItem
#
# @return [SolidusSubscriptions::LineItemBuilder]
def initialize(subscription_line_items)
@subscription_line_items = subscription_line_items
end
# Get a new (unpersisted) Spree::LineItem which matches the details of
# :subscription_line_item
#
# @return [Array<Spree::LineItem>]
def spree_line_items
line_items = subscription_line_items.map do |subscription_line_item|
variant = subscribables.fetch(subscription_line_item.subscribable_id)
raise UnsubscribableError.new(variant) unless variant.subscribable?
next unless variant.can_supply?(subscription_line_item.quantity)
Spree::LineItem.new(variant: variant, quantity: subscription_line_item.quantity)
end
# Either all line items for an installment are fulfilled or none are
line_items.all? ? line_items : []
end
private
def subscribables
return @subscribables if @subscribables
ids = subscription_line_items.map(&:subscribable_id)
@subscribables ||= Spree::Variant.find(ids).index_by(&:id)
end
end
end
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