Refactor shopify (#13588)

* move shopify settings to ERPNext

* [fix] setup webhook for order and validate webhook request

* validate webhook request

* sync customer and item if not exists while syncing order from shopify

* pull item from shopify and minor fixes

* fix method naming, mechanisim to register and withdraw webhooks, patch

* minor fix

* minor fixes

* [Patch][fix] use remove_from_installed_apps instead of remove app

* log exceptions

* add shopify logging for failed requests

* minor fixes

* fix test case

* codecy fixes

* check shared secret exists

* Test Case fixes

* UX fixes and patch fixes

* Documentation

* fixes

* [fix] dump webhooks request data into doctype

* Provision to resync the order if error occured in sync

* [fix] set default host

erpnext/erpnext_integrations/utils.py

@@ -0,0 +1,42 @@
+import frappe
+from frappe import _
+import base64, hashlib, hmac
+from six.moves.urllib.parse import urlparse
+
+def validate_webhooks_request(doctype,  hmac_key, secret_key='secret'):
+	def innerfn(fn):
+		settings = frappe.get_doc(doctype)
+
+		if frappe.request and settings and settings.get(secret_key) and not frappe.flags.in_test:
+			sig = base64.b64encode(
+				hmac.new(
+					settings.get(secret_key).encode('utf8'),
+					frappe.request.data,
+					hashlib.sha256
+				).digest()
+			)
+
+			if frappe.request.data and \
+				frappe.get_request_header(hmac_key) and \
+				not sig == bytes(frappe.get_request_header(hmac_key).encode()):
+					frappe.throw(_("Unverified Webhook Data"))
+			frappe.set_user(settings.modified_by)
+
+		return fn
+
+	return innerfn
+
+def get_webhook_address(connector_name, method, exclude_uri=False):
+	endpoint = "erpnext.erpnext_integrations.connectors.{0}.{1}".format(connector_name, method)
+
+	if exclude_uri:
+		return endpoint
+
+	try:
+		url = frappe.request.url
+	except RuntimeError:
+		url = "http://localhost:8000"
+
+	server_url = '{uri.scheme}://{uri.netloc}/api/method/{endpoint}'.format(uri=urlparse(url), endpoint=endpoint)
+
+	return server_url