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fab-manager/app/models/price.rb

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# frozen_string_literal: true
MINUTES_PER_HOUR = 60.0
SECONDS_PER_MINUTE = 60.0
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# Store customized price for various items (Machine, Space), depending on the group and on the plan
# Also provides a static helper method to compute the price details of a shopping cart
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class Price < ApplicationRecord
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belongs_to :group
belongs_to :plan
belongs_to :priceable, polymorphic: true
validates :priceable, :group_id, :amount, presence: true
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validates :priceable_id, uniqueness: { scope: %i[priceable_type plan_id group_id] }
class << self
##
# @param admin {Boolean} true if the current user (ie.the user who requests the price) is an admin
# @param user {User} The user who's reserving (or selected if an admin is reserving)
# @param reservable {Machine|Training|Event} what the reservation is targeting
# @param slots {Array<Slot>} when did the reservation will occur
# @param [plan_id] {Number} if the user is subscribing to a plan at the same time of his reservation, specify the plan's ID here
# @param [nb_places] {Number} for _reservable_ of type Event, pass here the number of booked places
# @param [tickets] {Array<Ticket>} for _reservable_ of type Event, mapping of the number of seats booked per price's category
# @param [coupon_code] {String} Code of the coupon to apply to the total price
# @return {Hash} total and price detail
##
def compute(admin, user, reservable, slots, plan_id = nil, nb_places = nil, tickets = nil, coupon_code = nil)
total_amount = 0
all_elements = {}
all_elements[:slots] = []
# initialize Plan
plan = if user.subscribed_plan
new_plan_being_bought = false
user.subscribed_plan
elsif plan_id
new_plan_being_bought = true
Plan.find(plan_id)
else
new_plan_being_bought = false
nil
end
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# === compute reservation price ===
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case reservable
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# Machine reservation
when Machine
base_amount = reservable.prices.find_by(group_id: user.group_id, plan_id: plan.try(:id)).amount
if plan
machine_credit = plan.machine_credits.select { |credit| credit.creditable_id == reservable.id }.first
if machine_credit
hours_available = credits_hours(machine_credit, user, new_plan_being_bought)
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slots.each_with_index do |slot, index|
total_amount += get_slot_price(base_amount, slot, admin, elements: all_elements, has_credits: (index < hours_available))
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end
else
slots.each do |slot|
total_amount += get_slot_price(base_amount, slot, admin, elements: all_elements)
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end
end
else
slots.each do |slot|
total_amount += get_slot_price(base_amount, slot, admin, elements: all_elements)
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end
end
# Training reservation
when Training
amount = reservable.amount_by_group(user.group_id).amount
if plan
# Return True if the subscription link a training credit for training reserved by the user
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space_is_creditable = plan.training_credits.select { |credit| credit.creditable_id == reservable.id }.any?
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# Training reserved by the user is free when :
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# |-> the user already has a current subscription and if space_is_creditable is true and has at least one credit available.
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if !new_plan_being_bought
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amount = 0 if user.training_credits.size < plan.training_credit_nb && space_is_creditable
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# |-> the user buys a new subscription and if space_is_creditable is true.
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else
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amount = 0 if space_is_creditable
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end
end
slots.each do |slot|
total_amount += get_slot_price(amount, slot, admin, elements: all_elements, is_division: false)
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end
# Event reservation
when Event
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amount = reservable.amount * nb_places
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tickets&.each do |ticket|
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amount += ticket[:booked] * EventPriceCategory.find(ticket[:event_price_category_id]).amount
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end
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slots.each do |slot|
total_amount += get_slot_price(amount, slot, admin, elements: all_elements, is_division: false)
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end
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# Space reservation
when Space
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base_amount = reservable.prices.find_by(group_id: user.group_id, plan_id: plan.try(:id)).amount
if plan
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space_credit = plan.space_credits.select { |credit| credit.creditable_id == reservable.id }.first
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if space_credit
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hours_available = credits_hours(space_credit, user, new_plan_being_bought)
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slots.each_with_index do |slot, index|
total_amount += get_slot_price(base_amount, slot, admin, elements: all_elements, has_credits: (index < hours_available))
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end
else
slots.each do |slot|
total_amount += get_slot_price(base_amount, slot, admin, elements: all_elements)
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end
end
else
slots.each do |slot|
total_amount += get_slot_price(base_amount, slot, admin, elements: all_elements)
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end
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end
# No reservation (only subscription)
when nil
total_amount = 0
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# Unknown reservation type
else
raise NotImplementedError
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end
# === compute Plan price if any ===
unless plan_id.nil?
all_elements[:plan] = plan.amount
total_amount += plan.amount
end
# === apply Coupon if any ===
_amount_no_coupon = total_amount
cs = CouponService.new
cp = cs.validate(coupon_code, user.id)
total_amount = cs.apply(total_amount, cp)
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# return result
{ elements: all_elements, total: total_amount.to_i, before_coupon: _amount_no_coupon.to_i, coupon: cp }
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end
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private
GET_SLOT_PRICE_DEFAULT_OPTS = { has_credits: false, elements: nil, is_division: true }.freeze
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##
# Compute the price of a single slot, according to the base price and the ability for an admin
# to offer the slot.
# @param hourly_rate {Number} base price of a slot
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# @param slot {Hash} Slot object
# @param is_admin {Boolean} true if the current user has the 'admin' role
# @param [options] {Hash} optional parameters, allowing the following options:
# - elements {Array} if provided the resulting price will be append into elements.slots
# - has_credits {Boolean} true if the user still has credits for the given slot, false if not provided
# - is_division {boolean} false if the slot covers an full availability, true if it is a subdivision (default)
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# @return {Number} price of the slot
##
def get_slot_price(hourly_rate, slot, is_admin, options = {})
options = GET_SLOT_PRICE_DEFAULT_OPTS.merge(options)
slot_rate = options[:has_credits] || (slot[:offered] && is_admin) ? 0 : hourly_rate
real_price = if options[:is_division]
(slot_rate / MINUTES_PER_HOUR) * ((slot[:end_at].to_time - slot[:start_at].to_time) / SECONDS_PER_MINUTE)
else
slot_rate
end
unless options[:elements].nil?
options[:elements][:slots].push(
start_at: slot[:start_at],
price: real_price,
promo: (slot_rate != hourly_rate)
)
end
real_price
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end
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##
# Compute the number of remaining hours in the users current credits (for machine or space)
##
def credits_hours(credits, user, new_plan_being_bought)
hours_available = credits.hours
unless new_plan_being_bought
user_credit = user.users_credits.find_by(credit_id: credits.id)
hours_available = credits.hours - user_credit.hours_used if user_credit
end
hours_available
end
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end
end