[hub] Move sync, correct legacy code

erpnext/hub_node/__init__.py

@@ -10,3 +10,8 @@ def enable_hub():
 	hub_settings.register()
 	frappe.db.commit()
 	return hub_settings
+
+@frappe.whitelist()
+def sync():
+	hub_settings = frappe.get_doc('Hub Settings')
+	hub_settings.sync()

erpnext/hub_node/doctype/hub_settings/hub_settings.py

@@ -109,11 +109,6 @@ def reset_hub_settings(last_sync_datetime = ""):
 	doc.save()
 	frappe.msgprint(_("Successfully unregistered."))
 
-@frappe.whitelist()
-def sync():
-	hub_settings = frappe.get_doc('Hub Settings')
-	hub_settings.sync()
-
 @frappe.whitelist()
 def register_seller(**kwargs):
 	settings = frappe.get_doc('Hub Settings')

erpnext/hub_node/legacy.py

@@ -2,6 +2,21 @@ from __future__ import unicode_literals
 import frappe, requests, json
 from frappe.utils import now, nowdate
 from frappe.frappeclient import FrappeClient
+from frappe.utils.nestedset import get_root_of
+from frappe.contacts.doctype.contact.contact import get_default_contact
+
+def get_list(doctype, start, limit, fields, filters, order_by):
+	pass
+
+def get_hub_connection():
+	if frappe.db.exists('Data Migration Connector', 'Hub Connector'):
+		hub_connector = frappe.get_doc('Data Migration Connector', 'Hub Connector')
+		hub_connection = hub_connector.get_connection()
+		return hub_connection.connection
+
+	# read-only connection
+	hub_connection = FrappeClient(frappe.conf.hub_url)
+	return hub_connection
 
 @frappe.whitelist()
 def get_item_favourites(start=0, limit=20, fields=["*"], order_by=None):