Unify document type selection forms

Merge all document type selection forms into a single smarter form
that can perform permission filtering and allow single or multiple
selections.

This commit also add the document type selection for submit
view to the file metadata app.

This commit also updates the document type selection views
for the OCR, document parsing, and upload wizard to use
the new document type selection form and removes their
respective document type selection forms.

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

mayan/apps/document_parsing/views.py

@@ -3,7 +3,7 @@ from __future__ import absolute_import, unicode_literals
 from django.contrib import messages
 from django.http import HttpResponseRedirect
 from django.shortcuts import get_object_or_404
-from django.urls import reverse, reverse_lazy
+from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ungettext
 
@@ -11,11 +11,10 @@ from mayan.apps.common.generics import (
     FormView, MultipleObjectConfirmActionView, SingleObjectDetailView,
     SingleObjectDownloadView, SingleObjectEditView, SingleObjectListView
 )
+from mayan.apps.documents.forms import DocumentTypeFilteredSelectForm
 from mayan.apps.documents.models import Document, DocumentPage, DocumentType
 
-from .forms import (
-    DocumentContentForm, DocumentPageContentForm, DocumentTypeSelectForm
-)
+from .forms import DocumentContentForm, DocumentPageContentForm
 from .models import DocumentVersionParseError
 from .permissions import (
     permission_content_view, permission_document_type_parsing_setup,
@@ -159,37 +158,36 @@ class DocumentTypeSettingsEditView(SingleObjectEditView):
 
 
 class DocumentTypeSubmitView(FormView):
-    form_class = DocumentTypeSelectForm
     extra_context = {
         'title': _('Submit all documents of a type for parsing')
     }
+    form_class = DocumentTypeFilteredSelectForm
+    post_action_redirect = reverse_lazy('common:tools_list')
+
+    def get_form_extra_kwargs(self):
+        return {
+            'allow_multiple': True,
+            'permission': permission_parse_document,
+            'user': self.request.user
+        }
 
     def form_valid(self, form):
         count = 0
-        for document in form.cleaned_data['document_type'].documents.all():
-            document.submit_for_parsing()
-            count += 1
+        for document_type in form.cleaned_data['document_type']:
+            for document in document_type.documents.all():
+                document.submit_for_parsing()
+                count += 1
 
         messages.success(
             self.request, _(
-                '%(count)d documents of type "%(document_type)s" added to the '
-                'parsing queue.'
+                '%(count)d documents added to the parsing queue.'
             ) % {
                 'count': count,
-                'document_type': form.cleaned_data['document_type']
             }
         )
 
         return HttpResponseRedirect(self.get_success_url())
 
-    def get_form_extra_kwargs(self):
-        return {
-            'user': self.request.user
-        }
-
-    def get_post_action_redirect(self):
-        return reverse('common:tools_list')
-
 
 class ParseErrorListView(SingleObjectListView):
     extra_context = {