feat: HSN Code wise Item Tax (#19478)

* feat: HSN Code wise Item Tax

* feat: enqueued task of updating all items

erpnext/regional/doctype/gst_hsn_code/gst_hsn_code.js

@@ -3,6 +3,26 @@
 
 frappe.ui.form.on('GST HSN Code', {
 	refresh: function(frm) {
-
+		if(! frm.doc.__islocal && frm.doc.taxes.length){
+			frm.add_custom_button(__('Update Taxes for Items'), function(){
+				frappe.confirm(
+					'Are you sure? It will overwrite taxes for all items with HSN Code <b>'+frm.doc.name+'</b>.',
+					function(){
+						frappe.call({
+							args:{
+								taxes: frm.doc.taxes,
+								hsn_code: frm.doc.name
+							},
+							method: 'erpnext.regional.doctype.gst_hsn_code.gst_hsn_code.update_taxes_in_item_master',
+							callback: function(r) {
+								if(r.message){
+									frappe.show_alert(__('Item taxes updated'));
+								}
+							}
+						});
+					}
+				);
+			});
+		}
 	}
-});
+});

erpnext/regional/doctype/gst_hsn_code/gst_hsn_code.json

@@ -1,104 +1,46 @@
 {
- "allow_copy": 0, 
+ "autoname": "field:hsn_code",
- "allow_guest_to_view": 0, 
+ "creation": "2017-06-21 10:48:56.422086",
- "allow_import": 0, 
+ "doctype": "DocType",
- "allow_rename": 0, 
+ "editable_grid": 1,
- "autoname": "field:hsn_code", 
+ "engine": "InnoDB",
- "beta": 0, 
+ "field_order": [
- "creation": "2017-06-21 10:48:56.422086", 
+  "hsn_code",
- "custom": 0, 
+  "description",
- "docstatus": 0, 
+  "taxes"
- "doctype": "DocType", 
+ ],
- "document_type": "", 
- "editable_grid": 1, 
- "engine": "InnoDB", 
  "fields": [
   {
-   "allow_bulk_edit": 0, 
+   "fieldname": "hsn_code",
-   "allow_on_submit": 0, 
+   "fieldtype": "Data",
-   "bold": 0, 
+   "in_list_view": 1,
-   "collapsible": 0, 
+   "label": "HSN Code",
-   "columns": 0, 
+   "reqd": 1,
-   "fieldname": "hsn_code", 
+   "unique": 1
-   "fieldtype": "Data", 
+  },
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 0, 
-   "label": "HSN Code", 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 1, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0
-  }, 
   {
-   "allow_bulk_edit": 0, 
+   "fieldname": "description",
-   "allow_on_submit": 0, 
+   "fieldtype": "Small Text",
-   "bold": 0, 
+   "in_list_view": 1,
-   "collapsible": 0, 
+   "label": "Description"
-   "columns": 0, 
+  },
-   "fieldname": "description", 
+  {
-   "fieldtype": "Small Text", 
+   "fieldname": "taxes",
-   "hidden": 0, 
+   "fieldtype": "Table",
-   "ignore_user_permissions": 0, 
+   "label": "Taxes",
-   "ignore_xss_filter": 0, 
+   "options": "Item Tax"
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 0, 
-   "label": "Description", 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0
   }
- ], 
+ ],
- "has_web_view": 0, 
+ "modified": "2019-11-01 11:18:59.556931",
- "hide_heading": 0, 
+ "modified_by": "Administrator",
- "hide_toolbar": 0, 
+ "module": "Regional",
- "idx": 0, 
+ "name": "GST HSN Code",
- "image_view": 0, 
+ "owner": "Administrator",
- "in_create": 0, 
+ "permissions": [],
- "is_submittable": 0, 
+ "quick_entry": 1,
- "issingle": 0, 
+ "search_fields": "hsn_code, description",
- "istable": 0, 
+ "sort_field": "modified",
- "max_attachments": 0, 
+ "sort_order": "DESC",
- "modified": "2017-09-29 14:38:52.220743", 
+ "title_field": "hsn_code",
- "modified_by": "Administrator", 
+ "track_changes": 1
- "module": "Regional", 
- "name": "GST HSN Code", 
- "name_case": "", 
- "owner": "Administrator", 
- "permissions": [], 
- "quick_entry": 1, 
- "read_only": 0, 
- "read_only_onload": 0, 
- "search_fields": "hsn_code, description", 
- "show_name_in_global_search": 0, 
- "sort_field": "modified", 
- "sort_order": "DESC", 
- "title_field": "hsn_code", 
- "track_changes": 1, 
- "track_seen": 0
 }

erpnext/regional/doctype/gst_hsn_code/gst_hsn_code.py

@@ -8,3 +8,22 @@ from frappe.model.document import Document
 
 class GSTHSNCode(Document):
 	pass
+
+@frappe.whitelist()
+def update_taxes_in_item_master(taxes, hsn_code):
+	items = frappe.get_list("Item", filters={
+		'gst_hsn_code': hsn_code
+	})
+
+	taxes = frappe.parse_json(taxes)
+	frappe.enqueue(update_item_document, items=items, taxes=taxes)
+	return 1
+
+def update_item_document(items, taxes):
+	for item in items:
+		item_to_be_updated=frappe.get_doc("Item", item.name)
+		item_to_be_updated.taxes = []
+		for tax in taxes:
+			tax = frappe._dict(tax)
+			item_to_be_updated.append("taxes", {'item_tax_template': tax.item_tax_template, 'tax_category': tax.tax_category})
+			item_to_be_updated.save()

erpnext/stock/doctype/item/item.js

@@ -136,6 +136,20 @@ frappe.ui.form.on("Item", {
 		frm.toggle_reqd('customer', frm.doc.is_customer_provided_item ? 1:0);
 	},
 
+	gst_hsn_code: function(frm){
+		if(!frm.doc.taxes){
+			frappe.db.get_doc("GST HSN Code", frm.doc.gst_hsn_code).then(hsn_doc=>{
+				frm.doc.taxes = [];
+				$.each(hsn_doc.taxes || [], function(i, tax) {
+					let a = frappe.model.add_child(cur_frm.doc, 'Item Tax', 'taxes');
+					a.item_tax_template = tax.item_tax_template;
+					a.tax_category = tax.tax_category;
+					frm.refresh_field('taxes');
+				});
+			});
+		}
+	},
+
 	is_fixed_asset: function(frm) {
 		// set serial no to false & toggles its visibility
 		frm.set_value('has_serial_no', 0);