Working on issue #1161 - Count of Tickets in Zendesk import state overview is wrong due rate limit of 1000 tickets per batch.

app/assets/javascripts/app/controllers/import_zendesk.coffee

@@ -10,6 +10,7 @@ class Index extends App.ControllerContent
     '.zendesk-api-token-error':              'apiTokenErrorMessage'
     '#zendesk-email':                        'zendeskEmail'
     '#zendesk-api-token':                    'zendeskApiToken'
+    '.js-ticket-count-info':                 'ticketCountInfo'
   updateMigrationDisplayLoop: 0
 
   events:
@@ -172,6 +173,10 @@ class Index extends App.ControllerContent
           for key, item of data.data
             if item.done > item.total
               item.done = item.total
+
+            if key == 'Ticket' && item.total >= 1000
+              @ticketCountInfo.removeClass('hide')
+
             element = @$('.js-' + key.toLowerCase() )
             element.find('.js-done').text(item.done)
             element.find('.js-total').text(item.total)

app/assets/javascripts/app/views/import/zendesk.jst.eco

@@ -61,6 +61,7 @@
     <div class="wizard-slide vertical hide" data-slide="zendesk-import">
       <h2><%- @T('%s Migration', 'Zendesk') %></h2>
       <div class="alert alert--danger hide js-error" role="alert"></div>
+      <div class="alert alert--info hide js-ticket-count-info" role="alert"><%- @T("There are more than 1000 tickets in the Zendesk system. Due to API rate limit restrictions we can't get the exact number of tickets yet and have to fetch them in batches of 1000. This might take some time, better grab a cup of coffee. The total number of tickets gets updated as soon as the currently known number is surpassed.") %></div>
       <div class="wizard-body flex vertical justified">
         <table class="progressTable">
           <tr class="js-group">

lib/import/zendesk/ticket_factory.rb

@@ -2,6 +2,45 @@ module Import
   module Zendesk
     module TicketFactory
       extend Import::Zendesk::BaseFactory
+
+      # rubocop:disable Style/ModuleFunction
+      extend self
+
+      private
+
+      def import_loop(records, *args)
+
+        count_update_hook = proc { |record|
+          yield(record)
+          update_ticket_count(records)
+        }
+
+        super(records, *args, &count_update_hook)
+      end
+
+      def update_ticket_count(collection)
+
+        cache_key      = 'import_zendesk_stats'
+        count_variable = :@count
+        page_variable  = :@next_page
+
+        next_page    = collection.instance_variable_get(page_variable)
+        @last_page ||= next_page
+
+        return if @last_page == next_page
+        return if !collection.instance_variable_get(count_variable)
+
+        @last_page = next_page
+
+        # check cache
+        cache = Cache.get(cache_key)
+        return if !cache
+
+        cache['Tickets'] ||= 0
+        cache['Tickets']  += collection.instance_variable_get(count_variable)
+
+        Cache.write(cache_key, cache)
+      end
     end
   end
 end