Commonify function

frappe/contacts/address_and_contact.js

@@ -0,0 +1,21 @@
+// Copyright (c) 2018, Frappe Technologies and contributors
+// For license information, please see license.txt
+
+frappe.ui.form.on(cur_frm.doctype, {
+	get_last_doc: function() {
+		const reverse_routes = frappe.route_history.reverse();
+		const last_route = reverse_routes.find(route => {
+			return route[0] === 'Form' && route[1] !== cur_frm.doctype
+		})
+		let doctype = last_route && last_route[1];
+		let docname = last_route && last_route[2];
+
+		if (last_route && last_route.length > 3)
+			docname = last_route.slice(2).join("/");
+
+		return {
+			doctype,
+			docname
+		}
+	}
+});

frappe/contacts/doctype/address/address.js

@@ -1,6 +1,8 @@
 // Copyright (c) 2016, Frappe Technologies and contributors
 // For license information, please see license.txt
 
+{% include 'frappe/contacts/address_and_contact.js' %};
+
 frappe.ui.form.on("Address", {
 	refresh: function(frm) {
 		if(frm.doc.__islocal) {
@@ -44,21 +46,5 @@ frappe.ui.form.on("Address", {
 				}
 			}
 		]);
-	},
-	get_last_doc() {
-		const reverse_routes = frappe.route_history.reverse();
-		const last_route = reverse_routes.find(route => {
-			return route[0] === 'Form' && route[1] !== 'Address'
-		})
-		let doctype = last_route && last_route[1];
-		let docname = last_route && last_route[2];
-
-		if (last_route && last_route.length > 3)
-			docname = last_route.slice(2).join("/");
-
-		return {
-			doctype,
-			docname
-		}
 	}
 });

frappe/contacts/doctype/contact/contact.js

@@ -1,6 +1,8 @@
 // Copyright (c) 2016, Frappe Technologies and contributors
 // For license information, please see license.txt
 
+{% include 'frappe/contacts/address_and_contact.js' %};
+
 cur_frm.email_field = "email_id";
 frappe.ui.form.on("Contact", {
 	refresh: function(frm) {
@@ -59,22 +61,6 @@ frappe.ui.form.on("Contact", {
 				}
 			}
 		]);
-	},
-	get_last_doc() {
-		const reverse_routes = frappe.route_history.reverse();
-		const last_route = reverse_routes.find(route => {
-			return route[0] === 'Form' && route[1] !== 'Contact'
-		})
-		let doctype = last_route && last_route[1];
-		let docname = last_route && last_route[2];
-
-		if (last_route && last_route.length > 3)
-			docname = last_route.slice(2).join("/");
-
-		return {
-			doctype,
-			docname
-		}
 	}
 });