Revert "Change e-mail whitelist/blacklist to not be checked when invi…

…ted (mastodon#10683)"

This reverts commit 7cb369d.

app/models/user.rb

@@ -82,7 +82,7 @@ class User < ApplicationRecord
   accepts_nested_attributes_for :invite_request, reject_if: ->(attributes) { attributes['text'].blank? }
 
   validates :locale, inclusion: I18n.available_locales.map(&:to_s), if: :locale?
-  validates_with BlacklistedEmailValidator, on: :create
+  validates_with BlacklistedEmailValidator, if: :email_changed?
   validates_with EmailMxValidator, if: :validate_email_dns?
   validates :agreement, acceptance: { allow_nil: false, accept: [true, 'true', '1'] }, on: :create
 

app/validators/blacklisted_email_validator.rb

@@ -2,10 +2,7 @@
 
 class BlacklistedEmailValidator < ActiveModel::Validator
   def validate(user)
-    return if user.valid_invitation?
-
     @email = user.email
-
     user.errors.add(:email, I18n.t('users.invalid_email')) if blocked_email?
   end
 
@@ -16,7 +13,7 @@ def blocked_email?
   end
 
   def on_blacklist?
-    return true  if EmailDomainBlock.block?(@email)
+    return true if EmailDomainBlock.block?(@email)
     return false if Rails.configuration.x.email_domains_blacklist.blank?
 
     domains = Rails.configuration.x.email_domains_blacklist.gsub('.', '\.')

spec/validators/blacklisted_email_validator_spec.rb

@@ -8,7 +8,6 @@
     let(:errors) { double(add: nil) }
 
     before do
-      allow(user).to receive(:valid_invitation?) { false }
       allow_any_instance_of(described_class).to receive(:blocked_email?) { blocked_email }
       described_class.new.validate(user)
     end