Set accepted files for job spreadsheet upload

app/main/views/send.py

@@ -187,13 +187,15 @@ def send_messages(service_id, template_id):
             ))
 
     column_headings = get_spreadsheet_column_headings_from_template(template)
+    allowed_spreadsheet_file_extensions = ','.join([f'.{ext}' for ext in Spreadsheet.ALLOWED_FILE_EXTENSIONS])
 
     return render_template(
         'views/send.html',
         template=template,
         column_headings=list(ascii_uppercase[:len(column_headings)]),
         example=[column_headings, get_example_csv_rows(template)],
-        form=form
+        form=form,
+        allowed_spreadsheet_file_extensions=allowed_spreadsheet_file_extensions
     )
 
 
@@ -709,6 +711,7 @@ def _check_messages(service_id, template_id, upload_id, preview_row, letters_as_
 def check_messages(service_id, template_id, upload_id, row_index=2):
 
     data = _check_messages(service_id, template_id, upload_id, row_index)
+    data['allowed_spreadsheet_file_extensions'] = ','.join([f'.{ext}' for ext in Spreadsheet.ALLOWED_FILE_EXTENSIONS])
 
     if (
         data['recipients'].too_many_rows

app/templates/views/check/column-errors.html

@@ -137,6 +137,7 @@
       {% if not request.args.from_test %}
         {{ file_upload(
           form.file,
+          allowed_file_extensions=allowed_spreadsheet_file_extensions,
           action=url_for('.send_messages', service_id=current_service.id, template_id=template.id),
           button_text='Upload your file again'
         ) }}

app/templates/views/check/row-errors.html

@@ -43,6 +43,7 @@
     <div class="form-group">
       {{ file_upload(
         form.file,
+        allowed_file_extensions=allowed_spreadsheet_file_extensions,
         action=url_for('.send_messages', service_id=current_service.id, template_id=template.id),
         button_text='Upload your file again'
       ) }}

app/templates/views/send.html

@@ -19,6 +19,7 @@
   <div class="page-footer bottom-gutter">
     {{file_upload(
       form.file,
+      allowed_file_extensions=allowed_spreadsheet_file_extensions,
       button_text='Choose a file'
     )}}
   </div>