Fix: Find mailbox with cc email (#4372)

app/finders/email_channel_finder.rb

@@ -0,0 +1,15 @@
+class EmailChannelFinder
+  def initialize(email_object)
+    @email_object = email_object
+  end
+
+  def perform
+    channel = nil
+    recipient_mails = @email_object.to.to_a + @email_object.cc.to_a
+    recipient_mails.each do |email|
+      channel = Channel::Email.find_by('lower(email) = ? OR lower(forward_to_email) = ?', email.downcase, email.downcase)
+      break if channel.present?
+    end
+    channel
+  end
+end

app/mailboxes/application_mailbox.rb

@@ -21,17 +21,20 @@ class ApplicationMailbox < ActionMailbox::Base
   def self.support_mail?
     proc do |inbound_mail_obj|
       is_a_support_email = false
-      inbound_mail_obj.mail.to&.each do |email|
-        channel = Channel::Email.find_by('lower(email) = ? OR lower(forward_to_email) = ?', email.downcase, email.downcase)
-        if channel.present?
-          is_a_support_email = true
-          break
-        end
-      end
+
+      is_a_support_email = true if reply_to_mail?(inbound_mail_obj, is_a_support_email)
+
       is_a_support_email
     end
   end
 
+  def self.reply_to_mail?(inbound_mail_obj, is_a_support_email)
+    return if is_a_support_email
+
+    channel = EmailChannelFinder.new(inbound_mail_obj.mail).perform
+    channel.present?
+  end
+
   def self.catch_all_mail?
     proc { |_mail| true }
   end

app/mailboxes/mailbox_helper.rb

@@ -2,6 +2,8 @@ module MailboxHelper
   private
 
   def create_message
+    return if @conversation.messages.find_by(source_id: processed_mail.message_id).present?
+
     @message = @conversation.messages.create(
       account_id: @conversation.account_id,
       sender: @conversation.contact,

app/mailboxes/support_mailbox.rb

@@ -21,15 +21,17 @@ class SupportMailbox < ApplicationMailbox
   private
 
   def find_channel
-    mail.to.each do |email|
-      @channel = Channel::Email.find_by('lower(email) = ? OR lower(forward_to_email) = ?', email.downcase, email.downcase)
-      break if @channel.present?
-    end
+    find_channel_with_to_mail if @channel.blank?
+
     raise 'Email channel/inbox not found' if @channel.nil?
 
     @channel
   end
 
+  def find_channel_with_to_mail
+    @channel = EmailChannelFinder.new(mail).perform
+  end
+
   def load_account
     @account = @channel.account
   end

spec/finders/email_channel_finder_spec.rb

@@ -0,0 +1,29 @@
+require 'rails_helper'
+
+describe ::EmailChannelFinder do
+  include ActionMailbox::TestHelper
+  let!(:channel_email) { create(:channel_email) }
+
+  describe '#perform' do
+    context 'with cc mail' do
+      let(:reply_cc_mail) { create_inbound_email_from_fixture('reply_cc.eml') }
+
+      it 'return channel with cc email' do
+        channel_email.update(email: 'test@example.com')
+        channel = described_class.new(reply_cc_mail.mail).perform
+        expect(channel).to eq(channel_email)
+      end
+    end
+
+    context 'with to mail' do
+      let(:reply_mail) { create_inbound_email_from_fixture('reply.eml') }
+
+      it 'return channel with to email' do
+        channel_email.update(email: 'test@example.com')
+        reply_mail.mail['to'] = 'test@example.com'
+        channel = described_class.new(reply_mail.mail).perform
+        expect(channel).to eq(channel_email)
+      end
+    end
+  end
+end

spec/fixtures/files/in_reply_to.eml

@@ -5,7 +5,7 @@ Subject: Discussion: Let's debate these attachments
 Date: Tue, 20 Apr 2020 04:20:20 -0400
 In-Reply-To: <0CB459E0-0336-41DA-BC88-E6E28C697DDB@chatwoot.com>
 References: <4e6e35f5a38b4_479f13bb90078178@small-app-01.mail>
-Message-Id: <0CB459E0-0336-41DA-BC88-E6E28C697DDB@chatwoot.com>
+Message-Id: <0CB459E0-0336-41DA-BC88-E6E28C697DDBF@chatwoot.com>
 X-Mailer: Apple Mail (2.1244.3)
 
 --Apple-Mail=_33A037C7-4BB3-4772-AE52-FCF2D7535F74

spec/fixtures/files/reply_cc.eml

@@ -0,0 +1,30 @@
+MIME-Version: 1.0
+Date: Thu, 31 Mar 2022 19:25:32 +0530
+Message-ID: <CAFkiBVw2B=CPf=8=VqBQqssFp7XfGm4u6LpByHuMXWsPZCxPYQ@mail.gmail.com>
+Subject: Discussion: Let's debate these attachments
+From: Sony Mathew <sony@chatwoot.com>
+To: <test123@example.com>
+Cc: Replies <test@example.com>
+Content-Type: multipart/alternative; boundary="00000000000001f49e05db8404a8"
+
+--00000000000001f49e05db8404a8
+Content-Type: text/plain; charset="UTF-8"
+
+Hello,
+
+Find the related inbox.
+
+--
+*Sony Mathew*
+
+--00000000000001f49e05db8404a8
+Content-Type: text/html; charset="UTF-8"
+Content-Transfer-Encoding: quoted-printable
+
+<div dir=3D"ltr">Hello,<div><br></div><div>Find the related inbox.<br clear=
+=3D"all"><div><br></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" d=
+ata-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><d=
+iv><div><b>Sony Mathew</b><br></div><br></di=
+v></div></div></div></div></div></div>
+
+--00000000000001f49e05db8404a8--

spec/mailboxes/application_mailbox_spec.rb

@@ -6,6 +6,7 @@ RSpec.describe ApplicationMailbox, type: :mailbox do
   describe 'route the inbound mail to appropriate mailbox' do
     let(:welcome_mail) { create_inbound_email_from_fixture('welcome.eml') }
     let(:reply_mail) { create_inbound_email_from_fixture('reply.eml') }
+    let(:reply_cc_mail) { create_inbound_email_from_fixture('reply_cc.eml') }
     let(:reply_mail_without_uuid) { create_inbound_email_from_fixture('reply.eml') }
     let(:reply_mail_with_in_reply_to) { create_inbound_email_from_fixture('in_reply_to.eml') }
     let(:support_mail) { create_inbound_email_from_fixture('support.eml') }
@@ -55,6 +56,14 @@ RSpec.describe ApplicationMailbox, type: :mailbox do
         expect(dbl).to receive(:perform_processing).and_return(true)
         described_class.route support_mail
       end
+
+      it 'routes support emails to Support Mailbox with cc email' do
+        channel_email.update(email: 'test@example.com')
+        dbl = double
+        expect(SupportMailbox).to receive(:new).and_return(dbl)
+        expect(dbl).to receive(:perform_processing).and_return(true)
+        described_class.route reply_cc_mail
+      end
     end
   end
 end

spec/mailboxes/support_mailbox_spec.rb

@@ -148,6 +148,7 @@ RSpec.describe SupportMailbox, type: :mailbox do
         expect(conversation_1.messages.count).to eq(1)
 
         reply_mail_without_uuid.mail['In-Reply-To'] = 'conversation/6bdc3f4d-0bec-4515-a284-5d916fdde489/messages/123'
+        reply_mail_without_uuid.mail['Message-Id'] = '0CB459E0-0336-41DA-BC88-E6E28C697SFC@chatwoot.com'
 
         described_class.receive reply_mail_without_uuid