fix: Refactor 'destroy_user_account!' method in Decidim::DestroyAccou…

…nt command

lib/decidim/cleaner.rb

@@ -3,6 +3,7 @@
 require "decidim/cleaner/admin"
 require "decidim/cleaner/engine"
 require "decidim/cleaner/admin_engine"
+require "decidim/cleaner/extends/commands/decidim/destroy_account"
 
 module Decidim
   # This namespace holds the logic of the `Cleaner` module.

lib/decidim/cleaner/engine.rb

@@ -8,6 +8,10 @@ module Cleaner
     # This is the engine that runs on the public interface of cleaner.
     class Engine < ::Rails::Engine
       isolate_namespace Decidim::Cleaner
+
+      config.to_prepare do
+        Decidim::DestroyAccount.include(Decidim::Cleaner::Extends::DestroyAccount)
+      end
     end
   end
 end

lib/decidim/cleaner/extends/commands/decidim/destroy_account.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Decidim
+  module Cleaner
+    module Extends
+      # This command destroys the user's account.
+      module DestroyAccount
+        extend ActiveSupport::Concern
+
+        included do
+          private
+
+          # Invalidate all sessions after cleaning Decidim::User record to prevent Active Record error
+          def destroy_user_account!
+            @user.name = ""
+            @user.nickname = ""
+            @user.email = ""
+            @user.delete_reason = @form.delete_reason
+            @user.admin = false if @user.admin?
+            @user.deleted_at = Time.current
+            @user.skip_reconfirmation!
+            @user.avatar.purge
+            @user.save!
+
+            @user.invalidate_all_sessions!
+          end
+        end
+      end
+    end
+  end
+end

spec/commands/decidim/destroy_account_spec.rb

@@ -0,0 +1,108 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+module Decidim
+  describe DestroyAccount do
+    let(:command) { described_class.new(user, form) }
+    let(:user) { create(:user, :confirmed) }
+    let!(:identity) { create(:identity, user:) }
+    let(:valid) { true }
+    let(:data) do
+      {
+        delete_reason: "I want to delete my account"
+      }
+    end
+
+    let(:form) do
+      form = double(
+        delete_reason: data[:delete_reason],
+        valid?: valid
+      )
+
+      form
+    end
+
+    context "when invalid" do
+      let(:valid) { false }
+
+      it "broadcasts invalid" do
+        expect { command.call }.to broadcast(:invalid)
+      end
+    end
+
+    context "when valid" do
+      let(:valid) { true }
+
+      it "broadcasts ok" do
+        expect { command.call }.to broadcast(:ok)
+      end
+
+      it "changes the auth salt to invalidate all other sessions" do
+        old_salt = user.authenticatable_salt
+        command.call
+        expect(user.reload.authenticatable_salt).not_to eq(old_salt)
+      end
+
+      it "stores the deleted_at and delete_reason to the user" do
+        command.call
+        expect(user.reload.delete_reason).to eq(data[:delete_reason])
+        expect(user.reload.deleted_at).not_to be_nil
+      end
+
+      it "set name, nickname and email to blank string" do
+        command.call
+        expect(user.reload.name).to eq("")
+        expect(user.reload.nickname).to eq("")
+        expect(user.reload.email).to eq("")
+      end
+
+      it "destroys the current user avatar" do
+        command.call
+        expect(user.reload.avatar).not_to be_present
+      end
+
+      it "deletes user's identities" do
+        expect do
+          command.call
+        end.to change(Identity, :count).by(-1)
+      end
+
+      it "deletes user group memberships" do
+        user_group = create(:user_group)
+        create(:user_group_membership, user_group:, user:)
+
+        expect do
+          command.call
+        end.to change(UserGroupMembership, :count).by(-1)
+      end
+
+      it "deletes the follows" do
+        other_user = create(:user)
+        create(:follow, followable: user, user: other_user)
+        create(:follow, followable: other_user, user:)
+
+        expect do
+          command.call
+        end.to change(Follow, :count).by(-2)
+      end
+
+      it "deletes participatory space private user" do
+        create(:participatory_space_private_user, user:)
+
+        expect do
+          command.call
+        end.to change(ParticipatorySpacePrivateUser, :count).by(-1)
+      end
+
+      context "when user is admin" do
+        let(:user) { create(:user, :confirmed, :admin) }
+
+        it "removes admin role" do
+          command.call
+          expect(user.reload.admin).to be_falsey
+        end
+      end
+    end
+  end
+end