Restrict customer status change using script.

Jira Code: TM-193

Description

1. Whenever a proposal is created for the customer, the customer Lead status will be changed from PROSPECT-Pre sales order to CUSTOMER-Closed Won as a default NetSuite action. This action needs to be changed. When a proposal is created, the customer status needs to remain the same as PROSPECT-Pre sales order.
2. When Pre-sales order button is visible at that time the status should not be changed.

    /**
     * @NApiVersion 2.x
     * @NScriptType UserEventScript
     * @NModuleScope SameAccount
     */
    /*******************************************************************************
     * TM-193 UE Restrict customer status change
     * **************************************************************************
     * 
     * Date: 11-05-2019
     * 
     * Author: Jobin & Jismi IT Services LLP
     * 
     *****************************************************************************
     **/
    define(['N/format', 'N/url', 'N/search', 'N/runtime', 'N/record', 'N/https', 'N/ui/serverWidget'],

        function(format, url, search, runtime, record, https, serverWidget) {
            var main = {
                beforeLoad: function(scriptContext) {
                    log.debug("scriptContext", scriptContext)
                    var newRecId = scriptContext.newRecord.id;
                    if (scriptContext.type == "view") {

                        var salesorder = record.load({
                            type: "salesorder",
                            id: newRecId,
                            isDynamic: false
                        });
                        var customer = salesorder.getValue({
                            fieldId: 'entity'
                        })
                        var salescustomer = record.load({
                            type: "customer",
                            id: customer,
                            isDynamic: false
                        });
                        salescustomer.setValue({
                            fieldId: 'entitystatus',
                            value: "18"
                        });
                        var salescustomId = salescustomer.save();
                        log.debug("salescustomId,", salescustomId);
                    }

                }
            };
            for (var key in main) {
                if (typeof main[key] === 'function') {
                    main[key] = trycatch(main[key], key);
                }
            }

            function trycatch(myfunction, key) {
                return function() {
                    try {
                        return myfunction.apply(this, arguments);
                    } catch (e) {
                        log.debug("e in  " + key, e);
                    }
                }
            };
            return main;

        });