text: from django.contrib import admin
  from django.utils.translation import ugettext_lazy as _
  from helpdesk.models import Queue, Ticket, FollowUp, PreSetReply, KBCategory
  from helpdesk.models import EscalationExclusion, EmailTemplate, KBItem
  from helpdesk.models import TicketChange, KBIAttachment, FollowUpAttachment, IgnoreEmail
  from helpdesk.models import CustomField
  
  
  @admin.register(Queue)
  class QueueAdmin(admin.ModelAdmin):
      list_display = ('title', 'slug', 'email_address', 'locale', 'time_spent')
      prepopulated_fields = {"slug": ("title",)}
  
      def time_spent(self, q):
          if q.dedicated_time:
              return "{} / {}".format(q.time_spent, q.dedicated_time)
          elif q.time_spent:
              return q.time_spent
          else:
              return "-"
  
  
  @admin.register(Ticket)
  class TicketAdmin(admin.ModelAdmin):
      list_display = ('title', 'status', 'assigned_to', 'queue',
                      'hidden_submitter_email', 'time_spent')
      date_hierarchy = 'created'
      list_filter = ('queue', 'assigned_to', 'status')
  
      def hidden_submitter_email(self, ticket):
          if ticket.submitter_email:
              username, domain = ticket.submitter_email.split("@")
              username = username[:2] + "*" * (len(username) - 2)
              domain = domain[:1] + "*" * (len(domain) - 2) + domain[-1:]
              return "%s@%s" % (username, domain)
          else:
              return ticket.submitter_email
      hidden_submitter_email.short_description = _('Submitter E-Mail')
  
      def time_spent(self, ticket):
          return ticket.time_spent
  
  
  class TicketChangeInline(admin.StackedInline):
      model = TicketChange
      extra = 0
  
  
  class FollowUpAttachmentInline(admin.StackedInline):
      model = FollowUpAttachment
      extra = 0
  
  
  class KBIAttachmentInline(admin.StackedInline):
      model = KBIAttachment
      extra = 0
  
  
  @admin.register(FollowUp)
  class FollowUpAdmin(admin.ModelAdmin):
      inlines = [TicketChangeInline, FollowUpAttachmentInline]
      list_display = ('ticket_get_ticket_for_url', 'title', 'date', 'ticket',
                      'user', 'new_status', 'time_spent')
      list_filter = ('user', 'date', 'new_status')
  
      def ticket_get_ticket_for_url(self, obj):
          return obj.ticket.ticket_for_url
      ticket_get_ticket_for_url.short_description = _('Slug')
  
  
  @admin.register(KBItem)
  class KBItemAdmin(admin.ModelAdmin):
      list_display = ('category', 'title', 'last_updated',)
      inlines = [KBIAttachmentInline]
      readonly_fields = ('voted_by', 'downvoted_by')
  
      list_display_links = ('title',)
  
  
  @admin.register(CustomField)
  class CustomFieldAdmin(admin.ModelAdmin):
      list_display = ('name', 'label', 'data_type')
  
  
  @admin.register(EmailTemplate)
  class EmailTemplateAdmin(admin.ModelAdmin):
      list_display = ('template_name', 'heading', 'locale')
      list_filter = ('locale', )
  
  
  @admin.register(IgnoreEmail)
  class IgnoreEmailAdmin(admin.ModelAdmin):
      list_display = ('name', 'queue_list', 'email_address', 'keep_in_mailbox')
  
  
  admin.site.register(PreSetReply)
  admin.site.register(EscalationExclusion)
  admin.site.register(KBCategory)
  