[fix] contact us page should create a opportunity by default (#6939)

diff --git a/erpnext/templates/utils.py b/erpnext/templates/utils.py
index f33e647..94f9242 100644
--- a/erpnext/templates/utils.py
+++ b/erpnext/templates/utils.py
@@ -10,15 +10,43 @@
 @frappe.whitelist(allow_guest=True)
 def send_message(subject="Website Query", message="", sender="", status="Open"):
 	from frappe.www.contact import send_message as website_send_message
+	lead = customer = None
 
 	website_send_message(subject, message, sender)
 
+	customer = frappe.db.get_value('Contact', dict(email_id=sender), 'customer')
+	if not customer:
+		lead = frappe.db.get_value('Lead', dict(email_id=sender))
+	if not lead:
+		new_lead = frappe.get_doc(dict(
+			doctype='Lead',
+			email_id = sender,
+			lead_name = sender.split('@')[0].title()
+		)).insert(ignore_permissions=True)
+
+	opportunity = frappe.get_doc(dict(
+		doctype='Opportunity',
+		enquiry_from = 'Customer' if customer else 'Lead',
+		status = 'Open',
+		title = subject,
+		to_discuss=message
+	))
+
+	if customer:
+		opportunity.customer = customer
+	else:
+		opportunity.lead = new_lead.name
+
+	opportunity.insert(ignore_permissions=True)
+
 	comm = frappe.get_doc({
 		"doctype":"Communication",
 		"subject": subject,
 		"content": message,
 		"sender": sender,
-		"sent_or_received": "Received"
+		"sent_or_received": "Received",
+		'reference_doctype': 'Opportunity',
+		'reference_name': opportunity.name
 	})
 	comm.insert(ignore_permissions=True)