Initial support for basic WooCommerce integration

can export products to WooCommerce, plus maintain local cache, and track Woo ID
for each rattail product

rattail_woocommerce/importing/versions.py

@@ -0,0 +1,42 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  Rattail -- Retail Software Framework
+#  Copyright © 2010-2021 Lance Edgar
+#
+#  This file is part of Rattail.
+#
+#  Rattail is free software: you can redistribute it and/or modify it under the
+#  terms of the GNU General Public License as published by the Free Software
+#  Foundation, either version 3 of the License, or (at your option) any later
+#  version.
+#
+#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+#  details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
+#
+################################################################################
+"""
+Rattail -> Rattail "versions" data import
+"""
+
+from rattail.importing import versions as base
+from rattail_woocommerce.db import model
+
+
+class WooVersionMixin(object):
+    """
+    Add default registration of custom importers
+    """
+
+    def add_woocommerce_importers(self, importers):
+        importers['WooCacheProduct'] = WooCacheProductImporter
+        return importers
+
+
+class WooCacheProductImporter(base.VersionImporter):
+    host_model_class = model.WooCacheProduct