Implement EmailBlackList (#5109)

* Implement BlacklistedEmailDomain

* Use Faker::Internet.domain_name

* Remove note column

* Add frozen_string_literal comment

* Delete unnecessary codes

* Sort alphabetically

* Change of wording

* Rename BlacklistedEmailDomain to EmailDomainBlock

6 files changed, 86 insertions, 0 deletions

diff --git a/app/controllers/admin/email_domain_blocks_controller.rb b/app/controllers/admin/email_domain_blocks_controller.rb
new file mode 100644
index 000000000..09275d5dc
--- /dev/null
+++ b/app/controllers/admin/email_domain_blocks_controller.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Admin
+  class EmailDomainBlocksController < BaseController
+    before_action :set_email_domain_block, only: [:show, :destroy]
+
+    def index
+      @email_domain_blocks = EmailDomainBlock.page(params[:page])
+    end
+
+    def new
+      @email_domain_block = EmailDomainBlock.new
+    end
+
+    def create
+      @email_domain_block = EmailDomainBlock.new(resource_params)
+
+      if @email_domain_block.save
+        redirect_to admin_email_domain_blocks_path, notice: I18n.t('admin.email_domain_blocks.created_msg')
+      else
+        render :new
+      end
+    end
+
+    def destroy
+      @email_domain_block.destroy
+      redirect_to admin_email_domain_blocks_path, notice: I18n.t('admin.email_domain_blocks.destroyed_msg')
+    end
+
+    private
+
+    def set_email_domain_block
+      @email_domain_block = EmailDomainBlock.find(params[:id])
+    end
+
+    def resource_params
+      params.require(:email_domain_block).permit(:domain)
+    end
+  end
+end
diff --git a/app/models/email_domain_block.rb b/app/models/email_domain_block.rb
new file mode 100644
index 000000000..839038bea
--- /dev/null
+++ b/app/models/email_domain_block.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: email_domain_blocks
+#
+#  id         :integer          not null, primary key
+#  domain     :string           not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+class EmailDomainBlock < ApplicationRecord
+  def self.block?(email)
+    domain = email.gsub(/.+@([^.]+)/, '\1')
+    where(domain: domain).exists?
+  end
+end
diff --git a/app/validators/blacklisted_email_validator.rb b/app/validators/blacklisted_email_validator.rb
index 0ba79694b..3f203f49a 100644
--- a/app/validators/blacklisted_email_validator.rb
+++ b/app/validators/blacklisted_email_validator.rb
@@ -12,6 +12,7 @@ class BlacklistedEmailValidator < ActiveModel::Validator
   end
 
   def on_blacklist?(value)
+    return true if EmailDomainBlock.block?(value)
     return false if Rails.configuration.x.email_domains_blacklist.blank?
 
     domains = Rails.configuration.x.email_domains_blacklist.gsub('.', '\.')
diff --git a/app/views/admin/email_domain_blocks/_email_domain_block.html.haml b/app/views/admin/email_domain_blocks/_email_domain_block.html.haml
new file mode 100644
index 000000000..61cff9395
--- /dev/null
+++ b/app/views/admin/email_domain_blocks/_email_domain_block.html.haml
@@ -0,0 +1,5 @@
+%tr
+  %td.domain
+    %samp= email_domain_block.domain
+  %td
+    = table_link_to 'trash', t('admin.email_domain_blocks.delete'), admin_email_domain_block_path(email_domain_block), method: :delete
diff --git a/app/views/admin/email_domain_blocks/index.html.haml b/app/views/admin/email_domain_blocks/index.html.haml
new file mode 100644
index 000000000..fbdb3b80b
--- /dev/null
+++ b/app/views/admin/email_domain_blocks/index.html.haml
@@ -0,0 +1,13 @@
+- content_for :page_title do
+  = t('admin.email_domain_blocks.title')
+
+%table.table
+  %thead
+    %tr
+      %th= t('admin.email_domain_blocks.domain')
+      %th
+  %tbody
+    = render @email_domain_blocks
+
+= paginate @email_domain_blocks
+= link_to t('admin.email_domain_blocks.add_new'), new_admin_email_domain_block_path, class: 'button'
diff --git a/app/views/admin/email_domain_blocks/new.html.haml b/app/views/admin/email_domain_blocks/new.html.haml
new file mode 100644
index 000000000..bcae867d9
--- /dev/null
+++ b/app/views/admin/email_domain_blocks/new.html.haml
@@ -0,0 +1,10 @@
+- content_for :page_title do
+  = t('.title')
+
+= simple_form_for @email_domain_block, url: admin_email_domain_blocks_path do |f|
+  = render 'shared/error_messages', object: @email_domain_block
+
+  = f.input :domain, placeholder: t('admin.email_domain_blocks.domain')
+
+  .actions
+    = f.button :button, t('.create'), type: :submit