From cc43805f25c1e3b69c18d78cf5bc6a409d95eac7 Mon Sep 17 00:00:00 2001
From: Saqib Ansari <nextchamp.saqib@gmail.com>
Date: Wed, 30 Sep 2020 19:34:09 +0530
Subject: [PATCH] feat: cancel e-way bill before cancelling IRN

---
 erpnext/regional/india/e_invoice_utils.py | 15 ++++++++++
 erpnext/regional/india/einvoice.js        | 35 ++++++++++++++++++++++-
 erpnext/regional/india/setup.py           |  8 ++++--
 3 files changed, 54 insertions(+), 4 deletions(-)

diff --git a/erpnext/regional/india/e_invoice_utils.py b/erpnext/regional/india/e_invoice_utils.py
index f597e329621..dc38b25bed7 100644
--- a/erpnext/regional/india/e_invoice_utils.py
+++ b/erpnext/regional/india/e_invoice_utils.py
@@ -192,6 +192,21 @@ def cancel_irn(irn, reason, remark=''):
 
 	return res
 
+@frappe.whitelist()
+def cancel_eway_bill(eway_bill, reason, remark=''):
+	einv_creds = get_einv_credentials()
+	endpoint = 'https://einv-apisandbox.nic.in/ewaybillapi/v1.03/ewayapi'
+	headers = get_header(einv_creds)
+
+	cancel_eway_bill_json = json.dumps(dict(ewbNo=eway_bill, cancelRsnCode=reason, cancelRmrk=remark))
+	enc_json = aes_encrypt(cancel_eway_bill_json, einv_creds.sek)
+	payload = dict(action="CANEWB", Data=enc_json)
+
+	res = make_post_request(endpoint, headers=headers, data=json.dumps(payload))
+	handle_err_response(res)
+
+	return res
+
 def handle_irn_response(data):
 	enc_signed_invoice = data['SignedInvoice']
 	enc_signed_qr_code = data['SignedQRCode']
diff --git a/erpnext/regional/india/einvoice.js b/erpnext/regional/india/einvoice.js
index 05cf56e8f51..20461ea317b 100644
--- a/erpnext/regional/india/einvoice.js
+++ b/erpnext/regional/india/einvoice.js
@@ -28,7 +28,8 @@ erpnext.setup_einvoice_actions = (doctype) => {
 						})
 					}
 				)
-			} else if (frm.doc.docstatus == 1 && frm.doc.irn && !frm.doc.irn_cancelled) {
+			}
+			if (frm.doc.docstatus == 1 && frm.doc.irn && !frm.doc.irn_cancelled) {
 				frm.add_custom_button(
 					"Cancel IRN",
 					() => {
@@ -59,6 +60,38 @@ erpnext.setup_einvoice_actions = (doctype) => {
 					}
 				)
 			}
+			if (frm.doc.docstatus == 1 && frm.doc.irn && !frm.doc.irn_cancelled && !frm.doc.eway_bill_cancelled) {
+				frm.add_custom_button(
+					"Cancel E-Way Bill",
+					() => {
+						const d = new frappe.ui.Dialog({
+							title: __('Cancel E-Way Bill'),
+							fields: [
+								{ "label" : "Reason", "fieldname": "reason", "fieldtype": "Select", "reqd": 1, "default": "1-Duplicate",
+									"options": ["1-Duplicate", "2-Data Entry Error", "3-Order Cancelled", "4-Other"] },
+								{ "label": "Remark", "fieldname": "remark", "fieldtype": "Data", "reqd": 1 }
+							],
+							primary_action: function() {
+								const data = d.get_values();
+								frappe.call({
+									method: 'erpnext.regional.india.e_invoice_utils.cancel_eway_bill',
+									args: { eway_bill: frm.doc.ewaybill, reason: data.reason.split('-')[0], remark: data.remark },
+									freeze: true,
+									callback: () => {
+										frm.set_value('eway_bill_cancelled', 1);
+										frm.save("Update");
+										d.hide()
+									},
+									error: () => d.hide()
+								})
+							},
+							primary_action_label: __('Submit')
+						});
+						d.show();
+					}
+				)
+			}
 		}
+		
 	})
 }
\ No newline at end of file
diff --git a/erpnext/regional/india/setup.py b/erpnext/regional/india/setup.py
index 0b032019145..d5aba17a88f 100644
--- a/erpnext/regional/india/setup.py
+++ b/erpnext/regional/india/setup.py
@@ -369,7 +369,7 @@ def make_custom_fields(update=True):
 			'fieldname': 'ewaybill',
 			'label': 'e-Way Bill No.',
 			'fieldtype': 'Data',
-			'depends_on': 'eval:(doc.docstatus === 1)',
+			'depends_on': 'eval:((doc.docstatus === 1 || doc.ewaybill) && doc.eway_bill_cancelled === 0)',
 			'allow_on_submit': 1,
 			'insert_after': 'tax_id',
 			'translatable': 0
@@ -379,10 +379,12 @@ def make_custom_fields(update=True):
 	si_einvoice_fields = [
 		dict(fieldname='irn', label='IRN', fieldtype='Data', read_only=1, insert_after='customer', no_copy=1,
 			depends_on='eval:in_list(["Register Regular", "SEZ", "Overseas", "Deemed Export"], doc.gst_category) && doc.irn_cancelled === 0'),
-		dict(fieldname='irn_cancelled', label='IRN Cancelled', fieldtype='Check', no_copy=1
+		dict(fieldname='irn_cancelled', label='IRN Cancelled', fieldtype='Check', no_copy=1,
 			depends_on='eval:(doc.irn_cancelled === 1)', read_only=1, allow_on_submit=1, insert_after='customer'),
 		dict(fieldname='signed_einvoice', fieldtype='Code', options='JSON', hidden=1, no_copy=1, read_only=1),
-		dict(fieldname='signed_qr_code', fieldtype='Code', options='JSON', hidden=1, no_copy=1, read_only=1)
+		dict(fieldname='signed_qr_code', fieldtype='Code', options='JSON', hidden=1, no_copy=1, read_only=1),
+		dict(fieldname='eway_bill_cancelled', label='E-Way Bill Cancelled', fieldtype='Check', no_copy=1,
+			depends_on='eval:(doc.eway_bill_cancelled === 1)', read_only=1, allow_on_submit=1, insert_after='customer'),
 	]
 
 	custom_fields = {