Class: Dscf::Marketplace::OrderValidationService

Inherits:
Object
  • Object
show all
Defined in:
app/services/dscf/marketplace/order_validation_service.rb

Class Method Summary collapse

Class Method Details

.validate(order) ⇒ Object

Validates all items in an order against current listings / availability. Sets validation_status on each OrderItem per the requirements doc: validated, no_longer_listed, price_changed, low_quantity Also populates resolved_* fields where applicable.



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# File 'app/services/dscf/marketplace/order_validation_service.rb', line 8

def self.validate(order)
  order.order_items.each do |item|
    validate_item(item)
  end
  # Transition order to splitting ready if all validated
  if order.order_items.all? { |i| i.validation_status == "validated" }
    order.update!(status: :splitting) if order.validating?
  end
  order.reload
end

.validate_item(item) ⇒ Object 



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# File 'app/services/dscf/marketplace/order_validation_service.rb', line 20

def self.validate_item(item)
  # Don't re-flag an item the aggregator has already resolved. Re-running
  # validation would otherwise compare the live listing price against the
  # untouched order unit_price and reopen the same issue forever.
  # A resolved item is "validated" but RETAINS its validation_note; an item
  # that was never flagged is "validated" with a nil note (set in the else
  # branch below), so the retained note cleanly distinguishes the two.
  return item if item.validation_status == "validated" && item.validation_note.present?

  current_listing = find_current_active_listing(item)
  return mark_no_longer_listed(item) unless current_listing

  current_price = current_listing.price
  current_qty   = current_listing.quantity

  if current_price != item.unit_price
    item.validation_status = :price_changed
    item.validation_note = "Price changed (listed: #{current_price})"
    item.resolved_unit_price = item.unit_price # keep original order price by default (user can choose listed later)
  elsif item.quantity > current_qty
    item.validation_status = :low_quantity
    item.validation_note = "Low quantity available (listed: #{current_qty})"
    item.resolved_quantity = [ item.quantity, current_qty ].min
  else
    item.validation_status = :validated
    item.validation_note = nil
    item.resolved_unit_price = nil
    item.resolved_quantity = nil
  end

  item.save! if item.changed?
  item
end