Add staging folder "no results" template

Signed-off-by: Roberto Rosario <roberto.rosario@mayan-edms.com>

HISTORY.rst

@@ -104,6 +104,8 @@
   the workflow view permission is granted to at
   least one workflow.
 - Add ACL support to smart links.
+- Add "no result" template to staging folder files
+  view.
 
 3.2.9 (2019-11-03)
 ==================

mayan/apps/sources/icons.py

@@ -16,6 +16,7 @@ icon_setup_source_edit = Icon(driver_name='fontawesome', symbol='pencil-alt')
 icon_source_create = Icon(driver_name='fontawesome', symbol='plus')
 icon_source_list = Icon(driver_name='fontawesome', symbol='upload')
 icon_staging_folder = Icon(driver_name='fontawesome', symbol='folder')
+icon_staging_folder_file = Icon(driver_name='fontawesome', symbol='file')
 icon_staging_file_delete = Icon(driver_name='fontawesome', symbol='times')
 icon_upload_view_link = Icon(driver_name='fontawesome', symbol='upload')
 icon_wizard_submit = Icon(driver_name='fontawesome', symbol='arrow-right')

mayan/apps/sources/views.py

@@ -30,7 +30,10 @@ from .exceptions import SourceException
 from .forms import (
     NewDocumentForm, NewVersionForm, WebFormUploadForm, WebFormUploadFormHTML5
 )
-from .icons import icon_log, icon_setup_sources, icon_upload_view_link
+from .icons import (
+    icon_log, icon_setup_sources, icon_staging_folder_file,
+    icon_upload_view_link
+)
 from .literals import SOURCE_UNCOMPRESS_CHOICE_ASK, SOURCE_UNCOMPRESS_CHOICE_Y
 from .links import (
     link_setup_source_create_imap_email, link_setup_source_create_pop3_email,
@@ -155,6 +158,17 @@ class UploadBaseView(MultiFormView):
                         'name': 'appearance/generic_list_subtemplate.html',
                         'context': {
                             'hide_link': True,
+
+                            'no_results_icon': icon_staging_folder_file,
+                            'no_results_text': _(
+                                'This could mean that the staging folder is '
+                                'empty. It could also mean that the '
+                                'operating system user account being used '
+                                'for Mayan EDMS doesn\'t have the necessary '
+                                'file system permissions for the folder.'
+                            ),
+                            'no_results_title': _('No staging files available'),
+
                             'object_list': staging_filelist,
                             'title': _('Files in staging path'),
                         }