From 5cdca97116fb1db2ff6e3a19a65a0b54040d852a Mon Sep 17 00:00:00 2001
From: Saksham Arora <sakshamarora1001@gmail.com>
Date: Mon, 8 Jan 2024 14:07:48 +0100
Subject: [PATCH] circulation: Made loan request start date to be configurable
 and validated at the backend

---
 invenio_app_ils/circulation/config.py                    | 2 ++
 .../circulation/loaders/schemas/json/loan_request.py     | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/invenio_app_ils/circulation/config.py b/invenio_app_ils/circulation/config.py
index e1045d51e..5a26649b7 100644
--- a/invenio_app_ils/circulation/config.py
+++ b/invenio_app_ils/circulation/config.py
@@ -74,6 +74,8 @@
 ILS_CIRCULATION_NOTIFICATION_OVERDUE_REMINDER_INTERVAL = 3
 #: The maximum duration of a loan request
 ILS_CIRCULATION_LOAN_REQUEST_DURATION_DAYS = 60
+#: Loan Request Offset Value
+ILS_CIRCULATION_LOAD_REQUEST_OFFSET = 0
 #: Period of time in days, before loans expire, for notifications etc.
 ILS_CIRCULATION_LOAN_WILL_EXPIRE_DAYS = 7
 #: Optional delivery methods when requesting a new loan. Set to empty object to
diff --git a/invenio_app_ils/circulation/loaders/schemas/json/loan_request.py b/invenio_app_ils/circulation/loaders/schemas/json/loan_request.py
index b6dfc884a..71e0777b0 100644
--- a/invenio_app_ils/circulation/loaders/schemas/json/loan_request.py
+++ b/invenio_app_ils/circulation/loaders/schemas/json/loan_request.py
@@ -83,6 +83,7 @@ def postload_checks(self, data, **kwargs):
         start = arrow.get(data["request_start_date"]).date()
         end = arrow.get(data["request_expire_date"]).date()
         duration_days = current_app.config["ILS_CIRCULATION_LOAN_REQUEST_DURATION_DAYS"]
+        loan_request_offset = timedelta(days=current_app.config["ILS_CIRCULATION_LOAD_REQUEST_OFFSET"])
         duration = timedelta(days=duration_days)
 
         if end < start:
@@ -106,4 +107,12 @@ def postload_checks(self, data, **kwargs):
                     "request_expire_date": [message],
                 }
             )
+        elif end - start < loan_request_offset:
+            message = "The request end date can only be {} days after the request start date.".format(loan_request_offset.days)
+            raise ValidationError(
+                {
+                    "request_start_date": [message],
+                    "request_expire_date": [message],
+                }
+            )
         return data