feat: new accounts controller for signup+onboarding (#8804)

* feat: add v2 accounts controller

* feat: allow empty account and user name

* feat: ensure  and  is present for v1 signup

* test: remove validation checks

* chore: apply suggestions

* chore: revert en.yml formatting

* chore: line at EOF

* fix: routes

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/controllers/api/v2/accounts_controller.rb

@@ -0,0 +1,48 @@
+class Api::V2::AccountsController < Api::BaseController
+  include AuthHelper
+
+  skip_before_action :authenticate_user!, :set_current_user, :handle_with_exception,
+                     only: [:create], raise: false
+  before_action :check_signup_enabled, only: [:create]
+  before_action :validate_captcha, only: [:create]
+  before_action :fetch_account, except: [:create]
+  before_action :check_authorization, except: [:create]
+
+  rescue_from CustomExceptions::Account::InvalidEmail,
+              CustomExceptions::Account::UserExists,
+              CustomExceptions::Account::UserErrors,
+              with: :render_error_response
+
+  def create
+    @user, @account = AccountBuilder.new(
+      email: account_params[:email],
+      user_password: account_params[:password],
+      user: current_user
+    ).perform
+    if @user
+      send_auth_headers(@user)
+      render 'api/v1/accounts/create', format: :json, locals: { resource: @user }
+    else
+      render_error_response(CustomExceptions::Account::SignupFailed.new({}))
+    end
+  end
+
+  private
+
+  def fetch_account
+    @account = current_user.accounts.find(params[:id])
+    @current_account_user = @account.account_users.find_by(user_id: current_user.id)
+  end
+
+  def account_params
+    params.permit(:account_name, :email, :name, :password, :locale, :domain, :support_email, :auto_resolve_duration, :user_full_name)
+  end
+
+  def check_signup_enabled
+    raise ActionController::RoutingError, 'Not Found' if GlobalConfigService.load('ENABLE_ACCOUNT_SIGNUP', 'false') == 'false'
+  end
+
+  def validate_captcha
+    raise ActionController::InvalidAuthenticityToken, 'Invalid Captcha' unless ChatwootCaptcha.new(params[:h_captcha_client_response]).valid?
+  end
+end