[#161847] Rake tasks for adding new PriceGroups to ScheduleRules (#3594)

# Release Notes

When a global price group is created, it needs to be added to all the schedule rules for it to appear on the UI for each product.

This created a rake tasks which does that.

CHANGELOG.md

@@ -4,6 +4,14 @@ Because we use squash and merge, you should be able to see the changes by lookin
 at the [commit log](https://github.com/tablexi/nucore-open/commits/master). However, we have begun keeping track of breaking changes
 or optional rake tasks.
 
+### Addition of `PriceGroupDiscount` ([#3397](https://github.com/tablexi/nucore-open/pull/3397), [#3594](https://github.com/tablexi/nucore-open/pull/3594))
+
+Rather than one discount being set on a schedule rule, each global price group has its own discount (`PriceGroupDiscount`) for each schedule rule.
+
+When transitioning a school to use `PriceGroupDiscount`s, the `schedule_rule:add_price_group_discounts` rake task should be run, which adds `PriceGroupDiscount`s for every global price group to every schedule rule.
+
+When adding a new global price group, the `price_group:add_global_price_group` rake task should be run. This creates the global price group and sets up `PriceGroupDiscount`s for it for every schedule rule.
+
 ### Addition of `facility_tile_list: true` feature flag ([#3193](https://github.com/tablexi/nucore-open/pull/3193))
 
 Schools that have set the feature flag `facility_tile_list: false` are not affected by this change.

app/models/price_group.rb

@@ -33,6 +33,14 @@ def self.external
     globals.find_by(name: Settings.price_group.name.external)
   end
 
+  # Create a global price group, if it does not exist, and setup all the
+  # schedule rules with price group discounts for the price group.
+  def self.setup_global(name:, is_internal: false, admin_editable: true, discount_percent: 0, display_order: nil)
+    price_group = find_or_create_global(name:, is_internal:, admin_editable:, display_order:)
+    price_group.setup_schedule_rules(discount_percent:)
+    price_group
+  end
+
   def is_not_global?
     !global?
   end
@@ -78,4 +86,50 @@ def external?
     !is_internal?
   end
 
+  # Creates price group discounts for this price group, if they do not exist
+  def setup_schedule_rules(discount_percent: 0)
+    ScheduleRule.all.each do |schedule_rule|
+      schedule_price_groups = schedule_rule.price_group_discounts.map(&:price_group)
+
+      if schedule_price_groups.include? self
+        puts("price_group_discount for #{self} already exists for schedule rule #{schedule_rule.id}") unless Rails.env.test?
+        next
+      end
+
+      schedule_rule.price_group_discounts.create(
+        price_group: self,
+        discount_percent:
+      )
+
+      puts("Created price_group_discount for #{self} and schedule rule #{schedule_rule.id}") unless Rails.env.test?
+    end
+  end
+
+  private
+
+  # Find a global price group by name, or create it if it does not exist
+  def self.find_or_create_global(name:, display_order:, is_internal: false, admin_editable: true)
+    global_price_groups = PriceGroup.globals
+    found_price_group = global_price_groups.find_by(name:)
+
+    if found_price_group
+      puts("Global price group '#{name}' already exists.") unless Rails.env.test?
+
+      found_price_group
+    else
+      pg = PriceGroup.new(
+        name:,
+        is_internal:,
+        admin_editable:,
+        facility_id: nil,
+        display_order: display_order || (global_price_groups.count + 1)
+      )
+
+      pg.save(validate: false)
+
+      puts("Created global price group '#{name}'") unless Rails.env.test?
+
+      pg
+    end
+  end
 end

db/seeds.rb

@@ -21,11 +21,15 @@
 PriceGroup.reset_column_information
 
 [
-  PriceGroup.create_with(is_internal: true, admin_editable: false).find_or_initialize_by(name: Settings.price_group.name.base),
-  PriceGroup.create_with(is_internal: true, admin_editable: true).find_or_initialize_by(name: Settings.price_group.name.cancer_center),
-  PriceGroup.create_with(is_internal: false, admin_editable: false).find_or_initialize_by(name: Settings.price_group.name.external),
-].each_with_index do |price_group, index|
-  next if price_group.name.blank? || price_group.persisted?
-  price_group.display_order = index + 1
-  price_group.save(validate: false)
+  { name: Settings.price_group.name.base, is_internal: true, admin_editable: false },
+  { name: Settings.price_group.name.cancer_center, is_internal: true, admin_editable: true },
+  { name: Settings.price_group.name.external, is_internal: false, admin_editable: false },
+].each do |pg_data|
+  next if pg_data[:name].blank?
+
+  PriceGroup.setup_global(
+    name: pg_data[:name],
+    is_internal: pg_data[:is_internal],
+    admin_editable: pg_data[:admin_editable]
+  )
 end

lib/tasks/demo_seed.rake

@@ -51,24 +51,18 @@ namespace :demo do
       end
     end
 
-    order = 1
     pgnu = pgex = nil
 
     Settings.price_group.name.to_hash.each do |k, v|
-      price_group = PriceGroup.find_or_initialize_by(name: v) do |pg|
-        pg.is_internal = (k == :base || k == :cancer_center)
-        pg.display_order = order
-      end
-
-      price_group.save(validate: false) # override facility validator
+      price_group = PriceGroup.setup_global(
+        name: v, is_internal: (k == :base || k == :cancer_center)
+      )
 
       if k == :base
         pgnu = price_group
       elsif k == :external
         pgex = price_group
       end
-
-      order += 1
     end
 
     fa = FacilityAccount.find_or_initialize_by(facility_id: facility.id) do |facility_account|

lib/tasks/pirce_groups.rake

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+namespace :price_group do
+  # This creates a new global price group, if it does not exist, and adds
+  # a PriceGroupDiscount for it to every ScheduleRule. If the price group
+  # already exists, this will just add PriceGroupDiscounts for it to ScheduleRules
+  # that are missing then.
+  #
+  # rake price_group:add_global_price_group["new group",true,false,15]
+  desc "Create a new global price group and/or setup schedule rules for it"
+  task :add_global_price_group, [:name, :internal, :admin_editable, :discount] => :environment do |_t, args|
+    name = args[:name]
+    is_internal = args[:internal].casecmp("true").zero?
+    admin_editable = args[:admin_editable].casecmp("true").zero?
+    discount_percent = args[:discount] || 0
+
+    PriceGroup.setup_global(name:, is_internal:, admin_editable:, discount_percent:)
+  end
+end

lib/tasks/schedule_rules.rake

@@ -1,7 +1,10 @@
 # frozen_string_literal: true
 
 namespace :schedule_rule do
-  desc "Adds PriceGroupDiscounts for global price groups to every schedule rule"
+  # This task is useful for switching a school over to PriceGroupDiscounts. If a
+  # school is already using price group discounts on all its schedule rules, this
+  # task will do nothing
+  desc "Adds PriceGroupDiscounts for existing global price groups to every schedule rule"
   task add_price_group_discounts: :environment do |_t, _args|
     price_groups = PriceGroup.globals
 

spec/rails_helper.rb

@@ -132,9 +132,8 @@
     Affiliate.OTHER
 
     # initialize price groups
-    @nupg = PriceGroup.find_or_create_by(name: Settings.price_group.name.base, is_internal: true, display_order: 1)
-    @nupg.save(validate: false)
-    PriceGroup.find_or_create_by(name: Settings.price_group.name.external, is_internal: false, display_order: 3).save(validate: false)
+    @nupg = PriceGroup.setup_global(name: Settings.price_group.name.base, is_internal: true, display_order: 1)
+    PriceGroup.setup_global(name: Settings.price_group.name.external, is_internal: false, display_order: 3)
 
     # Because many specs rely on not crossing a fiscal year boundary we lock the
     # time globally. Rails's `travel_to` helper does not work well with nesting, so