chore: Disable fetching new emails after mailbox error (#4176)

- Disabled email fetch job if credentials for the channel isn't working
- notify customers when the email channel isn't working

fixes: https://github.com/chatwoot/chatwoot/issues/4174

app/jobs/inboxes/fetch_imap_emails_job.rb

@@ -1,9 +1,28 @@
+require 'net/imap'
+
 class Inboxes::FetchImapEmailsJob < ApplicationJob
   queue_as :low
 
   def perform(channel)
-    return unless channel.imap_enabled?
+    return unless should_fetch_email?(channel)
 
+    process_mail_for_channel(channel)
+  rescue Errno::ECONNREFUSED, Net::OpenTimeout, Net::IMAP::NoResponseError
+    channel.authorization_error!
+  rescue StandardError => e
+    channel.authorization_error!
+    Sentry.capture_exception(e)
+  end
+
+  private
+
+  def should_fetch_email?(channel)
+    channel.imap_enabled? && !channel.reauthorization_required?
+  end
+
+  def process_mail_for_channel(channel)
+    # TODO: rather than setting this as default method for all mail objects, lets if can do new mail object
+    # using Mail.retriever_method.new(params)
     Mail.defaults do
       retriever_method :imap, address: channel.imap_address,
                               port: channel.imap_port,
@@ -21,6 +40,6 @@ class Inboxes::FetchImapEmailsJob < ApplicationJob
       end
     end
 
-    Channel::Email.update(channel.id, imap_inbox_synced_at: Time.now.utc) if new_mails
+    channel.update(imap_inbox_synced_at: Time.now.utc) if new_mails
   end
 end