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fab-manager/app/models/coupon.rb

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# frozen_string_literal: true
# Coupon is a textual code associated with a discount rate or an amount of discount
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class Coupon < ApplicationRecord
has_many :invoices
has_many :payment_schedule
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after_create :create_gateway_coupon
before_destroy :delete_gateway_coupon
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validates :name, presence: true
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validates :code, presence: true
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validates :code, format: { with: /\A[A-Z0-9\-]+\z/, message: 'only caps letters, numbers, and dashes' }
validates :code, uniqueness: true
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validates :validity_per_user, presence: true
validates :validity_per_user, inclusion: { in: %w[once forever] }
validates_with CouponDiscountValidator
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validates_with CouponExpirationValidator
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scope :disabled, -> { where(active: false) }
scope :expired, -> { where('valid_until IS NOT NULL AND valid_until < ?', DateTime.current) }
scope :sold_out, lambda {
joins(:invoices).select('coupons.*, COUNT(invoices.id) as invoices_count').group('coupons.id')
.where.not(max_usages: nil).having('COUNT(invoices.id) >= coupons.max_usages')
}
scope :active, lambda {
joins('LEFT OUTER JOIN invoices ON invoices.coupon_id = coupons.id')
.select('coupons.*, COUNT(invoices.id) as invoices_count')
.group('coupons.id')
.where('active = true AND (valid_until IS NULL OR valid_until >= ?)', DateTime.current)
.having('COUNT(invoices.id) < coupons.max_usages OR coupons.max_usages IS NULL')
}
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def safe_destroy
if usages.zero?
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destroy
else
false
end
end
def usages
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invoices.count
end
##
# Check the status of the current coupon. The coupon:
# - may have been disabled by an admin,
# - may has expired because the validity date has been reached,
# - may have been used the maximum number of times it was allowed
# - may have already been used by the provided user, if the coupon is configured to allow only one use per user,
# - may exceed the current cart's total amount, if the coupon is configured to discount an amount (and not a percentage)
# - may be available for use
# @param [user_id] {Number} if provided and if the current coupon's validity_per_user == 'once', check that the coupon
# was already used by the provided user
# @param [amount] {Number} if provided and if the current coupon's type == 'amont_off' check that the coupon
# does not exceed the cart total price
# @return {String} status identifier
##
def status(user_id = nil, amount = nil)
if !active?
'disabled'
elsif !valid_until.nil? && valid_until.at_end_of_day < DateTime.current
'expired'
elsif !max_usages.nil? && invoices.count >= max_usages
'sold_out'
elsif !user_id.nil? && validity_per_user == 'once' && users_ids.include?(user_id.to_i)
'already_used'
elsif !amount.nil? && type == 'amount_off' && amount_off > amount.to_f
'amount_exceeded'
else
'active'
end
end
def type
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if amount_off.nil? && !percent_off.nil?
'percent_off'
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elsif percent_off.nil? && !amount_off.nil?
'amount_off'
end
end
def users
invoices.map(&:user)
end
def users_ids
users.map(&:id)
end
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def send_to(user_id)
NotificationCenter.call type: 'notify_member_about_coupon',
receiver: User.find(user_id),
attached_object: self
end
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private
def create_gateway_coupon
PaymentGatewayService.new.create_coupon(id)
end
def delete_gateway_coupon
PaymentGatewayService.new.delete_coupon(id)
end
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end