fix: undefined method contact in support mailbox (#2678)

if chatwoot receives an email of already existing contact with a different case say "Care@example.com", before this fix, it will throw an error. Now it will retrieve existing contact

Fixes: #2553


Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/builders/contact_builder.rb

@@ -38,17 +38,30 @@ class ContactBuilder
   end
 
   def find_contact
-    contact = nil
-
-    contact = account.contacts.find_by(identifier: contact_attributes[:identifier]) if contact_attributes[:identifier].present?
-
-    contact ||= account.contacts.find_by(email: contact_attributes[:email]) if contact_attributes[:email].present?
-
-    contact ||= account.contacts.find_by(phone_number: contact_attributes[:phone_number]) if contact_attributes[:phone_number].present?
-
+    contact = find_contact_by_identifier(contact_attributes[:identifier])
+    contact ||= find_contact_by_email(contact_attributes[:email])
+    contact ||= find_contact_by_phone_number(contact_attributes[:phone_number])
     contact
   end
 
+  def find_contact_by_identifier(identifier)
+    return if identifier.blank?
+
+    account.contacts.find_by(identifier: identifier)
+  end
+
+  def find_contact_by_email(email)
+    return if email.blank?
+
+    account.contacts.find_by(email: email.downcase)
+  end
+
+  def find_contact_by_phone_number(phone_number)
+    return if phone_number.blank?
+
+    account.contacts.find_by(phone_number: phone_number)
+  end
+
   def build_contact_inbox
     ActiveRecord::Base.transaction do
       contact = find_contact || create_contact
@@ -57,6 +70,7 @@ class ContactBuilder
       contact_inbox
     rescue StandardError => e
       Rails.logger.info e
+      raise e
     end
   end
 end

app/presenters/mail_presenter.rb

@@ -77,6 +77,11 @@ class MailPresenter < SimpleDelegator
     }
   end
 
+  def from
+    # changing to downcase to avoid case mismatch while finding contact
+    @mail.from.map(&:downcase)
+  end
+
   private
 
   # forcing the encoding of the content to UTF-8 so as to be compatible with database and serializers

spec/builders/contact_builder_spec.rb

@@ -66,6 +66,20 @@ describe ::ContactBuilder do
       expect(contact_inbox.contact.id).to be(contact.id)
     end
 
+    it 'doesnot create contact when an uppercase email is passed for an already existing contact email' do
+      contact_inbox = described_class.new(
+        source_id: '123456',
+        inbox: inbox,
+        contact_attributes: {
+          name: 'Contact',
+          phone_number: '+1234567890',
+          email: contact.email.upcase
+        }
+      ).perform
+
+      expect(contact_inbox.contact.id).to be(contact.id)
+    end
+
     it 'doesnot create contact if it already exist with phone number' do
       contact_inbox = described_class.new(
         source_id: '123456',

spec/fixtures/files/welcome.eml

@@ -1,4 +1,4 @@
-From: Sony Mathew <sony@chatwoot.com>
+From: Sony Mathew <Sony@chatwoot.com>
 Mime-Version: 1.0 (Apple Message framework v1244.3)
 Content-Type: multipart/alternative; boundary="Apple-Mail=_33A037C7-4BB3-4772-AE52-FCF2D7535F74"
 Subject: Discussion: Let's debate these attachments

spec/presenters/mail_presenter_spec.rb

@@ -52,5 +52,9 @@ RSpec.describe MailPresenter do
       expect(data[:multipart]).to eq(true)
       expect(data[:subject]).to eq(decorated_mail.subject)
     end
+
+    it 'give email from in downcased format' do
+      expect(decorated_mail.from.first.eql?(mail.from.first.downcase)).to eq true
+    end
   end
 end