Merge pull request #16859 from rohitwaghchaure/added_new_tags_e_invoice_xml

fix: added tags for discount amount, multiple customer po no, delivery notes
diff --git a/erpnext/accounts/page/pos/pos.js b/erpnext/accounts/page/pos/pos.js
index c3274b9..4550ded 100755
--- a/erpnext/accounts/page/pos/pos.js
+++ b/erpnext/accounts/page/pos/pos.js
@@ -333,6 +333,7 @@
 		var me = this;
 		this.frm = {}
 		this.load_data(true);
+		this.frm.doc.offline_pos_name = '';
 		this.setup();
 		this.set_default_customer()
 	},
@@ -345,7 +346,6 @@
 
 		if (load_doc) {
 			this.frm.doc = JSON.parse(localStorage.getItem('doc'));
-			this.frm.doc.offline_pos_name = null;
 		}
 
 		$.each(this.meta, function (i, data) {
@@ -641,7 +641,7 @@
 			me.list_customers_btn.toggleClass("view_customer");
 			me.pos_bill.show();
 			me.list_customers_btn.show();
-			me.frm.doc.offline_pos_name = $(this).parents().attr('invoice-name')
+			me.frm.doc.offline_pos_name = $(this).parents().attr('invoice-name');
 			me.edit_record();
 		})
 
@@ -984,7 +984,7 @@
 		}
 
 		if(!this.customer_doc.fields_dict.customer_pos_id.value) {
-			this.customer_doc.set_value("customer_pos_id", $.now())
+			this.customer_doc.set_value("customer_pos_id", frappe.datetime.now_datetime())
 		}
 	},
 
@@ -1686,10 +1686,18 @@
 
 	create_invoice: function () {
 		var me = this;
+		var existing_pos_list = [];
 		var invoice_data = {};
 		this.si_docs = this.get_doc_from_localstorage();
 
-		if (this.frm.doc.offline_pos_name) {
+		if(this.si_docs) {
+			this.si_docs.forEach((row) => {
+				existing_pos_list.push(Object.keys(row));
+			});
+		}
+
+		if (this.frm.doc.offline_pos_name
+			&& in_list(existing_pos_list, this.frm.doc.offline_pos_name)) {
 			this.update_invoice()
 			//to retrieve and set the default payment
 			invoice_data[this.frm.doc.offline_pos_name] = this.frm.doc;
@@ -1698,8 +1706,8 @@
 
 			this.frm.doc.paid_amount = this.frm.doc.net_total
 			this.frm.doc.outstanding_amount = 0
-		} else {
-			this.frm.doc.offline_pos_name = $.now();
+		} else if(!this.frm.doc.offline_pos_name) {
+			this.frm.doc.offline_pos_name = frappe.datetime.now_datetime();
 			this.frm.doc.posting_date = frappe.datetime.get_today();
 			this.frm.doc.posting_time = frappe.datetime.now_time();
 			this.frm.doc.pos_total_qty = this.frm.doc.qty_total;
diff --git a/erpnext/hr/doctype/leave_application/leave_application.py b/erpnext/hr/doctype/leave_application/leave_application.py
index 692db8e..b73d0e5 100755
--- a/erpnext/hr/doctype/leave_application/leave_application.py
+++ b/erpnext/hr/doctype/leave_application/leave_application.py
@@ -399,6 +399,19 @@
 
 	return flt(allocation.total_leaves_allocated) - (flt(leaves_taken) + flt(leaves_encashed))
 
+def get_total_allocated_leaves(employee, leave_type, date):
+	filters= {
+		'from_date': ['<=', date],
+		'to_date': ['>=', date],
+		'docstatus': 1,
+		'leave_type': leave_type,
+		'employee': employee
+	}
+
+	leave_allocation_records = frappe.db.get_all('Leave Allocation', filters=filters, fields=['total_leaves_allocated'])
+
+	return flt(leave_allocation_records[0]['total_leaves_allocated']) if leave_allocation_records else flt(0)
+
 def get_leaves_for_period(employee, leave_type, from_date, to_date, status, docname=None):
 	leave_applications = frappe.db.sql("""
 		select name, employee, leave_type, from_date, to_date, total_leave_days
diff --git a/erpnext/hr/report/employee_leave_balance/employee_leave_balance.py b/erpnext/hr/report/employee_leave_balance/employee_leave_balance.py
index ed44d63..95cb30b 100644
--- a/erpnext/hr/report/employee_leave_balance/employee_leave_balance.py
+++ b/erpnext/hr/report/employee_leave_balance/employee_leave_balance.py
@@ -5,21 +5,21 @@
 import frappe
 from frappe import _
 from erpnext.hr.doctype.leave_application.leave_application \
-	import get_leave_allocation_records, get_leave_balance_on, get_approved_leaves_for_period
+	import get_leave_allocation_records, get_leave_balance_on, get_approved_leaves_for_period, get_total_allocated_leaves
 
 
 def execute(filters=None):
 	leave_types = frappe.db.sql_list("select name from `tabLeave Type` order by name asc")
-	
+
 	columns = get_columns(leave_types)
 	data = get_data(filters, leave_types)
-	
+
 	return columns, data
-	
+
 def get_columns(leave_types):
 	columns = [
-		_("Employee") + ":Link/Employee:150", 
-		_("Employee Name") + "::200", 
+		_("Employee") + ":Link/Employee:150",
+		_("Employee Name") + "::200",
 		_("Department") +"::150"
 	]
 
@@ -27,18 +27,18 @@
 		columns.append(_(leave_type) + " " + _("Opening") + ":Float:160")
 		columns.append(_(leave_type) + " " + _("Taken") + ":Float:160")
 		columns.append(_(leave_type) + " " + _("Balance") + ":Float:160")
-	
+
 	return columns
-	
+
 def get_data(filters, leave_types):
 	user = frappe.session.user
 	allocation_records_based_on_to_date = get_leave_allocation_records(filters.to_date)
 	allocation_records_based_on_from_date = get_leave_allocation_records(filters.from_date)
 
-	active_employees = frappe.get_all("Employee", 
-		filters = { "status": "Active", "company": filters.company}, 
+	active_employees = frappe.get_all("Employee",
+		filters = { "status": "Active", "company": filters.company},
 		fields = ["name", "employee_name", "department", "user_id"])
-	
+
 	data = []
 	for employee in active_employees:
 		leave_approvers = get_approvers(employee.department)
@@ -51,8 +51,7 @@
 					filters.from_date, filters.to_date)
 
 				# opening balance
-				opening = get_leave_balance_on(employee.name, leave_type, filters.from_date,
-					allocation_records_based_on_from_date.get(employee.name, frappe._dict()))
+				opening = get_total_allocated_leaves(employee.name, leave_type, filters.to_date)
 
 				# closing balance
 				closing = get_leave_balance_on(employee.name, leave_type, filters.to_date,
@@ -61,7 +60,7 @@
 				row += [opening, leaves_taken, closing]
 
 			data.append(row)
-		
+
 	return data
 
 def get_approvers(department):