Previous request open (#2605)

* Create Readme.MD

* Create previous request client script.js

* Create previous request script include.js

* Rename previous request script include to previous request script include.js

Author: Maheshkh9738

Client-Side Components/Catalog Client Script/previous Request/Readme.MD

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+Show previous request ON requested for selection
+
+This feature enhances the Service Catalog experience by displaying previous requests for the selected Requested For user. When a user selects the Requested For variable in a catalog item form, a confirmation message appears showing the last few requests created for that user.

Client-Side Components/Catalog Client Script/previous Request/previous request client script.js

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+function onChange(control, oldValue, newValue, isLoading) {
+    if (isLoading || newValue == '') return;
+
+    var ga = new GlideAjax('PreviousRequestsUtils');
+    ga.addParam('sysparm_name', 'getPreviousRequests');
+    ga.addParam('sysparm_requested_for', newValue);
+    ga.getXMLAnswer(function(response) {
+        var requests = JSON.parse(response);
+        if (requests.length === 0) {
+            alert('No previous requests found for this user.');
+        } else {
+            var message = 'Previous Requests:\n\n';
+            requests.forEach(function(req) {
+                message += 'Number: ' + req.number + ' | Item: ' + req.item + ' | Date: ' + req.date + '\n';
+            });
+            if (confirm(message + '\nDo you want to continue?')) {
+                // User clicked OK
+            } else {
+                // User clicked Cancel
+                g_form.setValue('requested_for', oldValue);
+            }
+        }
+    });
+}

Client-Side Components/Catalog Client Script/previous Request/previous request script include.js

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+var PreviousRequestsUtils = Class.create();
+PreviousRequestsUtils.prototype = Object.extendsObject(AbstractAjaxProcessor, {
+    getPreviousRequests: function() {
+        var requestedFor = this.getParameter('sysparm_requested_for');
+        var result = [];
+        var gr = new GlideRecord('sc_req_item');
+        gr.addQuery('requested_for', requestedFor);
+        gr.orderByDesc('sys_created_on');
+        gr.setLimit(5); // Show last 5 requests
+        gr.query();
+        while (gr.next()) {
+            result.push({
+                number: gr.number.toString(),
+                item: gr.cat_item.getDisplayValue(),
+                date: gr.sys_created_on.getDisplayValue()
+            });
+        }
+        return JSON.stringify(result);
+    }
+});