feat: Add configurable interval for IMAP sync (#9302)

app/jobs/inboxes/fetch_imap_emails_job.rb

@@ -3,13 +3,13 @@ require 'net/imap'
 class Inboxes::FetchImapEmailsJob < MutexApplicationJob
   queue_as :scheduled_jobs
 
-  def perform(channel)
+  def perform(channel, interval = 1)
     return unless should_fetch_email?(channel)
 
     key = format(::Redis::Alfred::EMAIL_MESSAGE_MUTEX, inbox_id: channel.inbox.id)
 
     with_lock(key, 5.minutes) do
-      process_email_for_channel(channel)
+      process_email_for_channel(channel, interval)
     end
   rescue *ExceptionList::IMAP_EXCEPTIONS => e
     Rails.logger.error "Authorization error for email channel - #{channel.inbox.id} : #{e.message}"
@@ -28,11 +28,11 @@ class Inboxes::FetchImapEmailsJob < MutexApplicationJob
     channel.imap_enabled? && !channel.reauthorization_required?
   end
 
-  def process_email_for_channel(channel)
+  def process_email_for_channel(channel, interval)
     inbound_emails = if channel.microsoft?
-                       Imap::MicrosoftFetchEmailService.new(channel: channel).perform
+                       Imap::MicrosoftFetchEmailService.new(channel: channel, interval: interval).perform
                      else
-                       Imap::FetchEmailService.new(channel: channel).perform
+                       Imap::FetchEmailService.new(channel: channel, interval: interval).perform
                      end
     inbound_emails.map do |inbound_mail|
       process_mail(inbound_mail, channel)

app/services/imap/base_fetch_email_service.rb

@@ -1,7 +1,7 @@
 require 'net/imap'
 
 class Imap::BaseFetchEmailService
-  pattr_initialize [:channel!]
+  pattr_initialize [:channel!, :interval]
 
   def fetch_emails
     # Override this method
@@ -99,10 +99,10 @@ class Imap::BaseFetchEmailService
   end
 
   # Sends a SEARCH command to search the mailbox for messages that were
-  # created between yesterday and today and returns message sequence numbers.
+  # created between yesterday (or given date) and today and returns message sequence numbers.
   # Return <message set>
   def fetch_available_mail_sequence_numbers
-    imap_client.search(['SINCE', yesterday])
+    imap_client.search(['SINCE', since])
   end
 
   def build_imap_client
@@ -123,7 +123,8 @@ class Imap::BaseFetchEmailService
     Mail.read_from_string(raw_email_content)
   end
 
-  def yesterday
-    (Time.zone.today - 1).strftime('%d-%b-%Y')
+  def since
+    previous_day = Time.zone.today - (interval || 1).to_i
+    previous_day.strftime('%d-%b-%Y')
   end
 end