Merge pull request #10687 from opf/fix/42377/mailer-interceptors

Fix mailer interceptors rejecting empty to addresses

app/mailers/application_mailer.rb

@@ -173,36 +173,3 @@ class ApplicationMailer < ActionMailer::Base
     host
   end
 end
-
-##
-# Interceptors
-#
-# These are registered in config/initializers/register_mail_interceptors.rb
-#
-# Unfortunately, this results in changes on the interceptor classes during development mode
-# not being reflected until a server restart.
-
-class DefaultHeadersInterceptor
-  def self.delivering_email(mail)
-    mail.headers(default_headers)
-  end
-
-  def self.default_headers
-    {
-      'X-Mailer' => 'OpenProject',
-      'X-OpenProject-Host' => Setting.host_name,
-      'X-OpenProject-Site' => Setting.app_title,
-      'Precedence' => 'bulk',
-      'Auto-Submitted' => 'auto-generated'
-    }
-  end
-end
-
-class DoNotSendMailsWithoutReceiverInterceptor
-  def self.delivering_email(mail)
-    receivers = [mail.to, mail.cc, mail.bcc]
-    # the above fields might be empty arrays (if entries have been removed
-    # by another interceptor) or nil, therefore checking for blank?
-    mail.perform_deliveries = false if receivers.all?(&:blank?)
-  end
-end

app/mailers/interceptors/default_headers.rb

@@ -0,0 +1,17 @@
+module Interceptors
+  class DefaultHeaders
+    def self.delivering_email(mail)
+      mail.headers(default_headers)
+    end
+
+    def self.default_headers
+      {
+        'X-Mailer' => 'OpenProject',
+        'X-OpenProject-Host' => Setting.host_name,
+        'X-OpenProject-Site' => Setting.app_title,
+        'Precedence' => 'bulk',
+        'Auto-Submitted' => 'auto-generated'
+      }
+    end
+  end
+end

app/mailers/interceptors/do_not_send_mails_without_recipient.rb

@@ -0,0 +1,10 @@
+module Interceptors
+  class DoNotSendMailsWithoutRecipient
+    def self.delivering_email(mail)
+      receivers = [mail.to, mail.cc, mail.bcc]
+      # the above fields might be empty arrays (if entries have been removed
+      # by another interceptor) or nil, therefore checking for blank?
+      mail.perform_deliveries = false if receivers.all?(&:blank?)
+    end
+  end
+end

config/initializers/register_mail_interceptors.rb

@@ -29,8 +29,6 @@
 # Register interceptors defined in app/mailers/user_mailer.rb
 # Do this here, so they aren't registered multiple times due to reloading in development mode.
 
-Rails.application.config.action_mailer.interceptors = [
-  "DefaultHeadersInterceptor",
-  # following needs to be the last interceptor
-  "DoNotSendMailsWithoutReceiverInterceptor"
-]
+ApplicationMailer.register_interceptor Interceptors::DefaultHeaders
+# following needs to be the last interceptor
+ApplicationMailer.register_interceptor Interceptors::DoNotSendMailsWithoutRecipient

spec/mailers/user_mailer_spec.rb

@@ -116,6 +116,12 @@ describe UserMailer, type: :mailer do
             with_settings: { user_format: :lastname_coma_firstname } do
       it_behaves_like 'mail is sent'
     end
+
+    context 'with the recipient being the system user' do
+      let(:recipient) { User.system }
+
+      it_behaves_like 'mail is not sent'
+    end
   end
 
   describe '#wiki_content_added' do