AP-4380: Add cloner service and copy proceedings

Use deep_clonable. This is one option, amoeba being
another.

Gemfile

@@ -5,6 +5,7 @@ ruby "3.2.2"
 
 gem "aasm", "~> 5.5.0"
 gem "active_model_serializers", "~> 0.10.14"
+gem "deep_cloneable", "~> 3.2.0"
 gem "discard", "~> 1.3"
 gem "geckoboard-ruby"
 gem "google-apis-sheets_v4"

Gemfile.lock

@@ -213,6 +213,8 @@ GEM
     date (3.3.3)
     debug_inspector (1.1.0)
     declarative (0.0.20)
+    deep_cloneable (3.2.0)
+      activerecord (>= 3.1.0, < 8)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     devise (4.9.3)
@@ -732,6 +734,7 @@ DEPENDENCIES
   cucumber
   cucumber-rails (>= 2.4.0)
   database_cleaner
+  deep_cloneable (~> 3.2.0)
   devise
   devise_saml_authenticatable (>= 1.7.0)
   dibber

app/forms/copy_case/confirmation_form.rb

@@ -7,6 +7,14 @@ class ConfirmationForm < BaseForm
     validates :copy_case_id, presence: true, unless: proc { draft? }
     validates :copy_case_confirmation, presence: true, unless: proc { draft? || copy_case_confirmation.present? }
 
+    def save
+      return false unless valid?
+
+      cloner = CopyCase::ClonerService.new(legal_aid_application, copy_case_id)
+      cloner.call
+    end
+    alias_method :save!, :save
+
     def exclude_from_model
       %i[copy_case_id copy_case_confirmation]
     end

app/services/copy_case/cloner_service.rb

@@ -0,0 +1,29 @@
+module CopyCase
+  class ClonerService
+    attr_accessor :copy, :original
+
+    def self.call(copy, original)
+      new(copy, original).call
+    end
+
+    def initialize(copy, original)
+      @copy = copy
+      @original = original
+    end
+
+    def call
+      clone_proceedings
+    end
+
+  private
+
+    def clone_proceedings
+      new_proceedings = original.proceedings.each_with_object([]) do |proceeding, memo|
+        memo << proceeding.deep_clone(except: %i[legal_aid_application_id proceeding_case_id])
+      end
+
+      copy.proceedings = new_proceedings
+      copy.save!
+    end
+  end
+end

spec/services/copy_case/cloner_service_spec.rb

@@ -0,0 +1,32 @@
+require "rails_helper"
+
+RSpec.describe CopyCase::ClonerService do
+  subject(:instance) { described_class.new(copy, original) }
+
+  describe "#call" do
+    subject(:call) { instance.call }
+
+    let(:copy) { create(:legal_aid_application, :with_applicant) }
+    let(:original) { create(:legal_aid_application, :with_proceedings) }
+
+    it "copies proceedings" do
+      expect { call }
+        .to change { copy.reload.proceedings.count }
+        .from(0)
+        .to(1)
+
+      original_proceeding = original.proceedings.first
+      copy_of_proceeding = copy.proceedings.first
+      expected_attributes = original_proceeding
+                              .attributes
+                              .except("id",
+                                      "legal_aid_application_id",
+                                      "proceeding_case_id",
+                                      "created_at",
+                                      "updated_at")
+
+      expect(copy_of_proceeding)
+        .to have_attributes(**expected_attributes)
+    end
+  end
+end