Multi-currency support (#425)

* Initial foundational pass at multi-currency

* Default format currency

* More work on currency and exchanging

* Re-build currencies on change

* Currency import/setup

* Background job overhaul + cheaper OXR plan support

* Lint fixes

* Test fixes

* Multi-currency setup instructions

* Allow decimals in the balance field

* Spacing fix for form

---------

Signed-off-by: Josh Pigford <josh@joshpigford.com>

db/migrate/20240209153232_add_currency_to_families.rb

@@ -0,0 +1,5 @@
+class AddCurrencyToFamilies < ActiveRecord::Migration[7.2]
+  def change
+    add_column :families, :currency, :string, default: 'USD'
+  end
+end

db/migrate/20240209174912_redo_money_storage.rb

@@ -0,0 +1,12 @@
+class RedoMoneyStorage < ActiveRecord::Migration[7.2]
+  def change
+    add_column :accounts, :original_balance, :decimal, precision: 19, scale: 4, default: 0.0
+    add_column :accounts, :original_currency, :string, default: "USD"
+    add_column :accounts, :converted_balance, :decimal, precision: 19, scale: 4, default: 0.0
+    add_column :accounts, :converted_currency, :string, default: "USD"
+
+    remove_column :accounts, :balance_cents
+    remove_column :accounts, :balance_currency
+    remove_column :accounts, :currency
+  end
+end

db/migrate/20240209200519_create_currencies.rb

@@ -0,0 +1,12 @@
+class CreateCurrencies < ActiveRecord::Migration[7.2]
+  def change
+    create_table :currencies, id: :uuid do |t|
+      t.string :name
+      t.string :iso_code
+
+      t.timestamps
+    end
+
+    add_index :currencies, :iso_code, unique: true
+  end
+end

db/migrate/20240209200924_create_exchange_rates.rb

@@ -0,0 +1,16 @@
+class CreateExchangeRates < ActiveRecord::Migration[7.2]
+  def change
+    create_table :exchange_rates, id: :uuid do |t|
+      t.string :base_currency, null: false
+      t.string :converted_currency, null: false
+      t.decimal :rate
+      t.date :date
+
+      t.timestamps
+    end
+
+    add_index :exchange_rates, :base_currency
+    add_index :exchange_rates, :converted_currency
+    add_index :exchange_rates, %i[base_currency converted_currency date], unique: true
+  end
+end

db/migrate/20240210155058_create_good_jobs.rb

@@ -0,0 +1,91 @@
+# frozen_string_literal: true
+
+class CreateGoodJobs < ActiveRecord::Migration[7.2]
+  def change
+    # Uncomment for Postgres v12 or earlier to enable gen_random_uuid() support
+    # enable_extension 'pgcrypto'
+
+    create_table :good_jobs, id: :uuid do |t|
+      t.text :queue_name
+      t.integer :priority
+      t.jsonb :serialized_params
+      t.datetime :scheduled_at
+      t.datetime :performed_at
+      t.datetime :finished_at
+      t.text :error
+
+      t.timestamps
+
+      t.uuid :active_job_id
+      t.text :concurrency_key
+      t.text :cron_key
+      t.uuid :retried_good_job_id
+      t.datetime :cron_at
+
+      t.uuid :batch_id
+      t.uuid :batch_callback_id
+
+      t.boolean :is_discrete
+      t.integer :executions_count
+      t.text :job_class
+      t.integer :error_event, limit: 2
+      t.text :labels, array: true
+    end
+
+    create_table :good_job_batches, id: :uuid do |t|
+      t.timestamps
+      t.text :description
+      t.jsonb :serialized_properties
+      t.text :on_finish
+      t.text :on_success
+      t.text :on_discard
+      t.text :callback_queue_name
+      t.integer :callback_priority
+      t.datetime :enqueued_at
+      t.datetime :discarded_at
+      t.datetime :finished_at
+    end
+
+    create_table :good_job_executions, id: :uuid do |t|
+      t.timestamps
+
+      t.uuid :active_job_id, null: false
+      t.text :job_class
+      t.text :queue_name
+      t.jsonb :serialized_params
+      t.datetime :scheduled_at
+      t.datetime :finished_at
+      t.text :error
+      t.integer :error_event, limit: 2
+    end
+
+    create_table :good_job_processes, id: :uuid do |t|
+      t.timestamps
+      t.jsonb :state
+    end
+
+    create_table :good_job_settings, id: :uuid do |t|
+      t.timestamps
+      t.text :key
+      t.jsonb :value
+      t.index :key, unique: true
+    end
+
+    add_index :good_jobs, :scheduled_at, where: "(finished_at IS NULL)", name: :index_good_jobs_on_scheduled_at
+    add_index :good_jobs, [ :queue_name, :scheduled_at ], where: "(finished_at IS NULL)", name: :index_good_jobs_on_queue_name_and_scheduled_at
+    add_index :good_jobs, [ :active_job_id, :created_at ], name: :index_good_jobs_on_active_job_id_and_created_at
+    add_index :good_jobs, :concurrency_key, where: "(finished_at IS NULL)", name: :index_good_jobs_on_concurrency_key_when_unfinished
+    add_index :good_jobs, [ :cron_key, :created_at ], where: "(cron_key IS NOT NULL)", name: :index_good_jobs_on_cron_key_and_created_at_cond
+    add_index :good_jobs, [ :cron_key, :cron_at ], where: "(cron_key IS NOT NULL)", unique: true, name: :index_good_jobs_on_cron_key_and_cron_at_cond
+    add_index :good_jobs, [ :finished_at ], where: "retried_good_job_id IS NULL AND finished_at IS NOT NULL", name: :index_good_jobs_jobs_on_finished_at
+    add_index :good_jobs, [ :priority, :created_at ], order: { priority: "DESC NULLS LAST", created_at: :asc },
+      where: "finished_at IS NULL", name: :index_good_jobs_jobs_on_priority_created_at_when_unfinished
+    add_index :good_jobs, [ :priority, :created_at ], order: { priority: "ASC NULLS LAST", created_at: :asc },
+      where: "finished_at IS NULL", name: :index_good_job_jobs_for_candidate_lookup
+    add_index :good_jobs, [ :batch_id ], where: "batch_id IS NOT NULL"
+    add_index :good_jobs, [ :batch_callback_id ], where: "batch_callback_id IS NOT NULL"
+    add_index :good_jobs, :labels, using: :gin, where: "(labels IS NOT NULL)", name: :index_good_jobs_on_labels
+
+    add_index :good_job_executions, [ :active_job_id, :created_at ], name: :index_good_job_executions_on_active_job_id_and_created_at
+  end
+end