feat(tresholds): Add models

app/models/plan.rb

@@ -20,6 +20,7 @@ class Plan < ApplicationRecord
   has_many :coupon_targets
   has_many :coupons, through: :coupon_targets
   has_many :invoices, through: :subscriptions
+  has_many :progressive_billing_tresholds
 
   has_many :applied_taxes, class_name: 'Plan::AppliedTax', dependent: :destroy
   has_many :taxes, through: :applied_taxes

app/models/progressive_billing_treshold.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class ProgressiveBillingTreshold < ApplicationRecord
+  include PaperTrailTraceable
+  include Currencies
+
+  belongs_to :plan
+
+  monetize :amount_cents
+
+  validates :amount_currency, inclusion: {in: currency_list}
+  validates :amount_cents, numericality: {greater_than: 0}
+  validates :amount_cents, uniqueness: {scope: %i[plan_id recurring]}
+  validates :recurring, uniqueness: {scope: :plan_id}, if: -> { recurring? }
+end

db/migrate/20240802115017_create_progressive_billing_tresholds.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class CreateProgressiveBillingTresholds < ActiveRecord::Migration[7.1]
+  def change
+    create_table :progressive_billing_tresholds, id: :uuid do |t|
+      t.references :plan, null: false, index: true, foreign_key: true, type: :uuid
+      t.string :treshold_display_name
+      t.bigint :amount_cents, null: false
+      t.string :amount_currency, null: false
+      t.boolean :recurring, null: false, default: false
+
+      t.timestamps
+    end
+
+    add_index :progressive_billing_tresholds, %i[amount_cents plan_id recurring], unique: true
+    add_index :progressive_billing_tresholds, %i[plan_id recurring], unique: true, where: "recurring is true"
+  end
+end

spec/factories/progressive_billing_tresholds.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :progressive_billing_treshold do
+    plan
+    treshold_display_name { Faker::Name.name }
+    amount_cents { 100 }
+    amount_currency { "EUR" }
+    recurring { false }
+
+    trait :recurring do
+      recurring { true }
+    end
+  end
+end

spec/models/plan_spec.rb

@@ -6,6 +6,7 @@
   subject(:plan) { build(:plan, trial_period: 3) }
 
   it { is_expected.to have_one(:minimum_commitment) }
+  it { is_expected.to have_many(:progressive_billing_tresholds) }
 
   it_behaves_like 'paper_trail traceable'
 

spec/models/progressive_billing_treshold_spec.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe ProgressiveBillingTreshold, type: :model do
+  subject(:progressive_billing_treshold) { build(:progressive_billing_treshold) }
+
+  it { is_expected.to belong_to(:plan) }
+
+  it { is_expected.to validate_inclusion_of(:amount_currency).in_array(Currencies::ACCEPTED_CURRENCIES.keys) }
+  it { is_expected.to validate_numericality_of(:amount_cents).is_greater_than(0) }
+  it { is_expected.to validate_uniqueness_of(:amount_cents).scoped_to(%i[plan_id recurring]) }
+  it { is_expected.to validate_uniqueness_of(:recurring).scoped_to(:plan_id) }
+end