Create Set due date on RITM

Sets the "due_date" for a Request Item (RITM) based on delivery time set on catalog item record.

Follows the below step to calculate and set value:
1) Reading the delivery time (in days) from the associated Catalog Item
2) Parsing the days component from the display value (e.g. "5 Days" - 5).
3) Adding those days to the record's creation date ("sys_created_on").
4) Writing the calculated date to "due_date".

Author: AnandMahajan2799

Server-Side Components/Business Rules/Set Due Date on Request and RITM based on Delivery Time/set_due_date_on_ritm.js

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+/**
+ * Business Rule: Set due date on RITM
+ * Table: sc_req_item
+ * When: before insert
+ *
+ * @description
+ * Sets the "due_date" for a Request Item (RITM) by:
+ *  1) Reading the delivery time (in days) from the associated Catalog Item
+ *  2) Parsing the days component from the display value (e.g. "5 Days" - 5).
+ *  3) Adding those days to the record's creation date ("sys_created_on").
+ *  4) Writing the calculated date to "due_date".
+ */
+(function executeRule(current, previous /* null when async */) {
+
+    try {
+        //  Get days from Catalog Item's delivery time field.
+        var deliveryTimeDaysStr = current.getDisplayValue('cat_item.delivery_time').split(' ')[0];
+
+        // Convert to a Number
+        var deliveryTimeDays = Number(deliveryTimeDaysStr);
+
+        var createdDate = current.getValue('sys_created_on');
+        var newDueDate = new GlideDateTime(createdDate);
+
+        // Add delivery days to created date in UTC to avoid timezone drift.
+        newDueDate.addDaysUTC(deliveryTimeDays);
+
+		    // Set due date
+        current.due_date.setValue(newDueDate.getValue());
+
+        // If you also need the estimated delivery date, uncomment the line below:
+        // current.estimated_delivery.setValue(newDueDate.getValue());
+
+    } catch (ex) {
+        var message = ex.getMessage();
+        gs.error("Error in BR: Set Due Date on RITM - " + message);
+    }
+
+})(current, previous);