Catalog Item: Add 7 Days Restriction

[cfrazer]

Hello,

On my ServiceNow catalog items, I have a field asking users when they would ideally need to receive their item by (it is a date field called needed_by). I would like to set a restriction that they cannot pick a date unless it is 7 days from the current date. If they pick a date sooner, I want a message to pop up stating that they need to pick a different date. I have tried everything, but cannot get this to work. Any help is appreciate. Here is my code so far:

function onChange(control, oldValue, newValue, isLoading) {   
   
if(isLoading || newValue == '') {   
return;   
}   
var date = now().adddays(7);
var select= new Date(getDateFromFormat(g_form.getValue('needed_by'),g_user_date_format));
 
if (select < date) {   
alert('Please select a future date.');   
g_form.clearValue('needed_by');   
}   
   
}   

[ccajohnson]

I cleaned up the script provided by Janjiv:

Be sure to create your Script include with the following details:

Name: DateValidation

Client callable: true

Accessible from: All application scopes

Script:

var DateValidation = Class.create();
DateValidation.prototype = Object.extendsObject(AbstractAjaxProcessor, {

       ValidateStartDate: function() {
               var se_start_date = this.getParameter('startdate');
               var opened_date = gs.now();
               var currentDateTime = new GlideDateTime();
               currentDateTime.setDisplayValue(opened_date,"MMM d, yyyy");
               var start_date = new GlideDateTime();
               start_date.setDisplayValue(se_start_date,"MMM d, yyyy");
               if (se_start_date!='' && start_date<currentDateTime) {
                       return 1;
               } else if (se_start_date!='') {
                       var dc = new DurationCalculator();
                       dc.setStartDateTime(currentDateTime);
                       if (!dc.calcDuration(7*24*3600)) {                   // Add 1 weeks
                               gs.log("*** Error calculating duration");
                       }
                       var newDateTime = dc.getEndDateTime();
                       if (start_date < newDateTime) {
                               return 2;
                       }
               }
       },

       type: 'DateValidation'
});