Drop Current.account and just use Account.sole

I had reintroduced this in dacb53b8 after David removed it in
6bbf68a4, but now I agree we don't need it.

Also, fix a CORS error when trying to redirect a user to an untenanted
path after login (see
https://fizzy.37signals.com/5986089/collections/2/cards/1032).

app/controllers/concerns/authentication.rb

@@ -5,7 +5,6 @@ module Authentication
     # Checking for tenant must happen first so we redirect before trying to access the db.
     before_action :require_tenant
 
-    before_action :set_current_account
     before_action :require_authentication
     helper_method :authenticated?
   end
@@ -23,7 +22,6 @@ module Authentication
 
     def require_untenanted_access(**options)
       skip_before_action :require_tenant, **options
-      skip_before_action :set_current_account, **options
       skip_before_action :require_authentication, **options
       before_action :redirect_tenanted_request, **options
     end
@@ -52,11 +50,14 @@ module Authentication
       Session.find_signed(cookies.signed[:session_token])
     end
 
-
-    def request_authentication
-      session[:return_to_after_authenticating] = request.url
-
-      redirect_to Launchpad.login_url(product: true, account: Current.account), allow_other_host: true
+    def request_authentication(untenanted: false)
+      if ApplicationRecord.current_tenant.present?
+        session[:return_to_after_authenticating] = request.url
+        redirect_to Launchpad.login_url(product: true, account: Account.sole), allow_other_host: true
+      else
+        # Don't save the current untenanted URL, because it's just going to bounce back to Launchpad after login anyway.
+        redirect_to Launchpad.login_url(product: true), allow_other_host: true
+      end
     end
 
     def after_authentication_url
@@ -83,10 +84,6 @@ module Authentication
       cookies.signed.permanent[:session_token] = { value: session.signed_id, httponly: true, same_site: :lax }
     end
 
-    def set_current_account
-      Current.account = Account.first
-    end
-
     def terminate_session
       Current.session.destroy
       cookies.delete(:session_token)

app/controllers/sessions/launchpad_controller.rb

@@ -7,7 +7,7 @@ class Sessions::LaunchpadController < ApplicationController
   end
 
   def update
-    user = Current.account.signal_account.authenticate(sig: @sig).try(:peer)
+    user = Account.sole.signal_account.authenticate(sig: @sig).try(:peer)
     if user.present? && user.active?
       start_new_session_for user
       redirect_to after_authentication_url

app/models/current.rb

@@ -1,7 +1,6 @@
 class Current < ActiveSupport::CurrentAttributes
   attribute :session
   attribute :http_method, :request_id, :user_agent, :ip_address, :referrer
-  attribute :account
 
   delegate :user, to: :session, allow_nil: true
 end

app/views/users/new.html.erb

@@ -4,7 +4,7 @@
   <nav class="header">
     <div class="header__actions header__actions--start"></div>
     <div class="header__actions header__actions--end">
-      <%= link_to Launchpad.login_url(account: Current.account), class: "btn", data: { controller: "hotkey", action: "keydown.esc@document->hotkey#click" } do %>
+      <%= link_to Launchpad.login_url(account: Account.sole), class: "btn", data: { controller: "hotkey", action: "keydown.esc@document->hotkey#click" } do %>
         <span class="for-screen-reader">Sign in instead</span>
       <% end %>
     </div>

db/seeds.rb

@@ -34,7 +34,7 @@ def find_or_create_user(full_name, email_address)
       )
     end
 
-    signal_account = Account.first.signal_account
+    signal_account = Account.sole.signal_account
     signal_user = SignalId::User.find_or_create_by!(identity: signal_identity, account: signal_account)
 
     if user = User.find_by(signal_user_id: signal_user.id)

script/bootstrap-signal-id.rb

@@ -15,7 +15,7 @@ class BootstrapSignalId
         puts "\n# tenant: #{tenant}"
 
         next unless check_account_preconditions
-        create_signal_id_account if Account.first.queenbee_id.nil?
+        create_signal_id_account if Account.sole.queenbee_id.nil?
 
         create_signal_id_users
       end
@@ -42,7 +42,7 @@ class BootstrapSignalId
       signal_id_account = SignalId::Account.find_by!(queenbee_id: queenbee_account.id)
       signal_id_account.update_column :subdomain, ApplicationRecord.current_tenant
 
-      account = Account.first
+      account = Account.sole
       account.queenbee_id = queenbee_account.id
       account.name = ApplicationRecord.current_tenant
       account.save!
@@ -50,7 +50,7 @@ class BootstrapSignalId
   end
 
   def create_signal_id_users
-    signal_account = Account.first.signal_account
+    signal_account = Account.sole.signal_account
 
     User.find_each do |user|
       if !user.system? && user.signal_user_id.nil?

script/closureulate/collections_and_cards.rb

@@ -4,7 +4,7 @@ COLLECTIONS_COUNT = 100
 CARDS_PER_COLLECTION = 50
 
 ApplicationRecord.current_tenant = "development-tenant"
-account = Account.first
+account = Account.sole
 user = account.users.first
 Current.session = user.sessions.last
 workflow = account.workflows.first

script/create-accounts-in-staging.rb

@@ -3,7 +3,7 @@
 require_relative "../config/environment"
 
 ApplicationRecord.with_each_tenant do |tenant|
-  account = Account.first
+  account = Account.sole
   signal_account = account.signal_account
 
   signal_users = SignalId::User.where(account_id: signal_account.id)

script/migrate-content-to-slugged-urls.rb

@@ -25,7 +25,7 @@ def fix_attachments(rich_text)
 end
 
 ApplicationRecord.with_each_tenant do |tenant|
-  account_id = Account.first.queenbee_id
+  account_id = Account.sole.queenbee_id
 
   unless account_id
     puts "Skipping URL fixup for tenant: #{tenant}"
@@ -37,7 +37,7 @@ ApplicationRecord.with_each_tenant do |tenant|
   domain = domains[Rails.env] || domains["production"]
   regex = %r{://\w+\.#{domain}/}
 
-  pp [ Account.first.name, account_id, domain, regex ]
+  pp [ Account.sole.name, account_id, domain, regex ]
   puts
 
   Card.find_each do |card|

script/populate/cards_for_pagination.rb

@@ -3,7 +3,7 @@ require_relative "../../config/environment"
 CARDS_COUNT = 200
 
 ApplicationRecord.current_tenant = "37signals"
-account = Account.first
+account = Account.sole
 user = User.first
 Current.session = user.sessions.last
 collection = Collection.first

script/rename-tenants-to-qb-account-id.rb

@@ -7,7 +7,7 @@ tenant_names = []
 ApplicationRecord.with_each_tenant do |tenant|
   next if tenant == "#{Rails.env}-tenant"
 
-  account = Account.first
+  account = Account.sole
   queenbee_id = account.queenbee_id
   tenant_names << { from: tenant, to: queenbee_id }