feat(HR): share doc with employee approvers if they don't have access

erpnext/hr/utils.py

@@ -504,3 +504,23 @@ def grant_leaves_automatically():
 		lpa = frappe.db.get_all("Leave Policy Assignment", filters={"effective_from": getdate(), "docstatus": 1, "leaves_allocated":0})
 		for assignment in lpa:
 			frappe.get_doc("Leave Policy Assignment", assignment.name).grant_leave_alloc_for_employee()
+
+def share_doc_with_approver(doc, user):
+	# if approver does not have permissions, share
+	if not frappe.has_permission(doc=doc, ptype="submit", user=user):
+		frappe.share.add(doc.doctype, doc.name, user, submit=1)
+		frappe.msgprint(_("Shared with the user {0} with {1} access").format(
+			user, frappe.bold("submit"), alert=True))
+
+	# remove shared doc if approver changes
+	doc_before_save = doc.get_doc_before_save()
+	if doc_before_save:
+		approvers = {
+			"Leave Application": "leave_approver",
+			"Expense Claim": "expense_approver",
+			"Shift Request": "approver"
+		}
+
+		approver = approvers.get(doc.doctype)
+		if doc_before_save.get(approver) != doc.get(approver):
+			frappe.share.remove(doc.doctype, doc.name, doc_before_save.get(approver))