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/datasync/woocommerce.py

@@ -0,0 +1,69 @@
+# -*- 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/>.
+#
+################################################################################
+"""
+DataSync for WooCommerce
+"""
+
+from rattail.datasync import FromRattailConsumer
+
+
+class FromRattailToWooCommerce(FromRattailConsumer):
+    """
+    Rattail -> WooCommerce datasync consumer
+    """
+    handler_spec = 'rattail_woocommerce.woocommerce.importing.rattail:FromRattailToWooCommerce'
+
+    def process_changes(self, session, changes):
+        """
+        Process all the given changes, coming from Rattail.
+        """
+        # tell session who is responsible here
+        if self.runas_username:
+            session.set_continuum_user(self.runas_username)
+
+        # get all importers up to speed
+        for importer in self.importers.values():
+            importer.host_session = session
+            importer.datasync_setup()
+
+        # sync all Product changes
+        types = [
+            'Product',
+            'ProductPrice',
+        ]
+        for change in [c for c in changes if c.payload_type in types]:
+            product = self.get_product(session, change)
+            if product:
+                self.process_change(session, self.importers['Product'],
+                                    host_object=product)
+
+    def get_product(self, session, change):
+        model = self.model
+
+        if change.payload_type == 'Product':
+            return session.query(model.Product).get(change.payload_key)
+
+        if change.payload_type == 'ProductPrice':
+            price = session.query(model.ProductPrice).get(change.payload_key)
+            if price:
+                return price.product