Validação de formulário em campos e FileUpload

Eu estou olhando para fazer validação / campos obrigatórios em um formulário que tenha entrada de texto earquivo de upload para anexos de arquivos.

O script recebe entradas e permite ao usuário anexar um arquivo. Ao enviar, ele adiciona campos de entrada à planilha e faz o upload do arquivo para minha unidade. O que eu quero fazer é forçar a entrada de texto e as listas suspensas a serem respondidas e exigir um anexo de arquivo.

Eu encontrei este link para exemplos"Exemplo de validação" mas estou com um problema ao tentar adicionar isso ao manipulador de cliques no meu código. Alguém pode ajudar a apontar na direção certa?

// Script-as-app template.
var submissionSSKey = 'Insert SS Key';

function doGet(e) {
  var app = UiApp.createApplication().setTitle('Loan Registration Processing');
  var panel = app.createFormPanel();
  var grid = app.createGrid(10,2).setId('loanGrid');
  var loanTypeLabel = app.createLabel('Loan Type');
  var loanList = app.createListBox().setName('Loan List').setWidth('120px').setName('LoanType');
      loanList.addItem('Select Option');    
      loanList.addItem('FHA');
      loanList.addItem('Convential');  
      loanList.addItem('VA');
      loanList.addItem('Reverse');
      loanList.addItem('HELOC');
  var borrowerNameLabel = app.createLabel("Borrower's Name");
  var borrowerTextbox = app.createTextBox().setWidth('150px').setName('borrower');
  var loanAmountLabel = app.createLabel('Loan Amount');
  var loanAmountTextbox = app.createTextBox().setWidth('150px').setName('amount');
  var appDateLabel = app.createLabel('Loan Date');
  var appDateTextbox = app.createDateBox().setWidth('150px').setName('date');
  var lienPostition = app.createLabel('Lien Position');
  var lienPos = app.createListBox().setName('Lien Position').setWidth('150px').setName('LienPosition');
      lienPos.addItem('Select Option');     
      lienPos.addItem('1st');
      lienPos.addItem('2nd');
  var propertyType = app.createLabel('Property Type');
  var propType = app.createListBox().setName('Property Type').setWidth('150px').setName('PropertyType');
      propType.addItem('Select Option');
      propType.addItem('1-4 Units');
      propType.addItem('Manufactured');
  var submitButton = app.createSubmitButton('<B>Submit</B>'); 
  var warning = app.createHTML('<B>PLEASE WAIT WHILE DATA IS UPLOADING<B>').setStyleAttribute('background','yellow').setVisible(false)
  //file upload
  var upLoadTypeLabel = app.createLabel('Point File');
  var upLoad = (app.createFileUpload().setName('thefile'));
  var upLoadTypeLabel2 = app.createLabel('Credit Report');
  var upLoad2 = (app.createFileUpload().setName('thefile2'));

  //Grid layout of items on form
  grid.setWidget(0, 0, loanTypeLabel)
      .setWidget(0, 1, loanList)
      .setWidget(1, 0, borrowerNameLabel)
      .setWidget(1, 1, borrowerTextbox)
      .setWidget(2, 0, loanAmountLabel)
      .setWidget(2, 1, loanAmountTextbox)
      .setWidget(3, 0, appDateLabel)
      .setWidget(3, 1, appDateTextbox)
      .setWidget(4, 0, lienPostition)
      .setWidget(4, 1, lienPos)
      .setWidget(5, 0, propertyType)
      .setWidget(5, 1, propType)
      .setWidget(6, 0, upLoadTypeLabel)
      .setWidget(6, 1, upLoad)
      .setWidget(7, 0, upLoadTypeLabel2)
      .setWidget(7, 1, upLoad2)
      .setWidget(8, 0, submitButton)
      .setWidget(9, 1, warning)

  var cliHandler = app.createClientHandler().forTargets(warning).setVisible(true)
  submitButton.addClickHandler(cliHandler);  
  panel.add(grid);
  app.add(panel);
  return app;

}

 function doPost(e) {
  var app = UiApp.getActiveApplication();
  var LoanType = e.parameter.LoanType;
  var borrower = e.parameter.borrower;
  var amount = e.parameter.amount;
  var date = e.parameter.date;
  var LienPosition = e.parameter.LienPosition;
  var PropertyType = e.parameter.PropertyType;

   //Spreadsheet to load form values to
   var sheet = SpreadsheetApp.openById(submissionSSKey).getActiveSheet();
   var lastRow = sheet.getLastRow();
   var targetRange = sheet.getRange(lastRow+1, 1, 1, 6).setValues([[LoanType,borrower,amount,date,LienPosition,PropertyType]]);
   // data returned is a blob for FileUpload widget
   var fileBlob = e.parameter.thefile;
   var fileBlob2 = e.parameter.thefile2;
   //Grabs the folder to send upload files
   var folder = DocsList.getFolderById('0B8PHKnfhErK-T2IzRW9ZWjcwRmc');
   //Creates the upload file in root
   var doc = DocsList.createFile(fileBlob);
   var doc2 = DocsList.createFile(fileBlob2);
   //moves created files in root to specific folder
   doc.addToFolder(folder);
   doc2.addToFolder(folder);
   //Remove the copy left in the root, leaving only the version in the specific folder
   doc.removeFromFolder(DocsList.getRootFolder());       
   doc2.removeFromFolder(DocsList.getRootFolder());   
   //Message to user after submit of form

   var uplabel = app.createHTML('<B>Thank you for your Loan Registation Subumission. Press F5 on your keyboard to enter another Loan Registration.</B>');

//Send email to group
   var emailAddress = '[email protected]';
   var folderURL = 'Folder URL';
   var ssURL = 'SS URL';

   var message = "<HTML><BODY>"
   + "<P>" + " A new Loan Registration has been submitted."
   + '<P>You can access the Loan Submitted documents <A HREF="' + folderURL + '">here</A>.'
   + '<P>You can access the submitted Loan Registration Spreadsheet <A HREF="' + ssURL + '">here</A>.'
   + "</HTML></BODY>";
   MailApp.sendEmail(emailAddress, "New Loan Registrtion Submittal Posted!", "", {htmlBody: message}); 
   app.add(uplabel);   
   return app;   
 }    

EDITAR - Adicionado no segundo upload e envio do arquivo não ativará

Eu voltei e editei o script e modifiquei um pouco para basicamente executar a mesma função de antes, mas este precisa fazer upload de dois arquivos. Estou seguindo o mesmo código, mas depois de testar o botão de envio nunca será ativado .. Aqui está o código que foi atualizado:

//Create the Labels, TextBoxes, and Drop downs
var borrowerTextbox = app.createTextBox().setWidth('150px').setName('borrower');
var Lender = app.createTextBox().setWidth('150px').setName('lender');
var correspondentBroker = app.createListBox().setName('Correspondent Broker').setWidth('120px').setName('correspondentbroker');
    correspondentBroker.addItem('Select Option');
    correspondentBroker.addItem('Correspondent');
    correspondentBroker.addItem('Broker');
var loanAmountTextbox = app.createTextBox().setWidth('150px').setName('amount');
var loanprogram = app.createTextBox().setWidth('150px').setName('program');
var rate = app.createTextBox().setWidth('150px').setName('rate');
var ysp = app.createTextBox().setWidth('150px').setName('ysp');
var closingcostcredit = app.createTextBox().setWidth('150px').setName('credit');
var ltv = app.createTextBox().setWidth('150px').setName('ltv');
var impound = app.createListBox().setName('impounds').setWidth('120px').setName('impounds');
    impound.addItem('Select Option');
    impound.addItem('Yes');
    impound.addItem('No');
var mortgageIns = app.createListBox().setName('Correspondent Broker').setWidth('120px').setName('mortgageinsurance');
    mortgageIns.addItem('Select Option');
    mortgageIns.addItem('MI');
    mortgageIns.addItem('PMI Borrower Paid');
    mortgageIns.addItem('PMI Lender Paid');
var upLoad = app.createFileUpload().setName('thefile');
var upLoad2 = app.createFileUpload().setName('thefile2');
var uploadtracker = app.createTextBox().setVisible(false);
var uploadtracker2 = app.createTextBox().setVisible(false);
var submitButton = app.createSubmitButton('<B>Submit</B>');  
var warning = app.createHTML('Please fill in all fields').setStyleAttribute('background','#FFcc99').setStyleAttribute('fontSize','20px');


//Click Handlers are set
var cliHandler2 = app.createClientHandler()
.validateLength(borrowerTextbox, 1, 40)
.validateLength(Lender, 1, 40)
.validateNotMatches(correspondentBroker,'Select Option')
.validateLength(loanAmountTextbox, 1, 40)
.validateLength(loanprogram, 1, 40)
.validateNotMatches(mortgageIns,'Select Option')
.validateLength(rate, 1, 40)
.validateLength(ysp, 1, 40)
.validateLength(closingcostcredit, 1, 40)
.validateLength(ltv, 1, 40)
.validateNotMatches(impound, 'Select Option')
.validateMatches(uploadtracker, 'selected')
.validateMatches(uploadtracker2, 'selected')
.forTargets(submitButton).setEnabled(true)
.forTargets(warning)
.setHTML('Now you can submit your form')
.setStyleAttribute('background','#99FF99')
.setStyleAttribute('fontSize','12px');

var cliHandler3 = app.createClientHandler().forTargets(uploadtracker).forTargets(uploadtracker2).setText('selected')

//Grid layout of items on form
grid.setText(0, 0, 'Borrower Name')
  .setWidget(0, 1, borrowerTextbox)
  .setText(1, 0, "Lender")
  .setWidget(1, 1, Lender)
  .setText(2, 0, 'Correspondent or Broker')
  .setWidget(2, 1, correspondentBroker)
  .setText(3, 0, 'Loan Amount')
  .setWidget(3, 1, loanAmountTextbox)
  .setText(4, 0, 'Loan Program')
  .setWidget(4, 1, loanprogram)  
  .setText(5, 0, 'Rate')
  .setWidget(5, 1, rate)  
  .setText(6, 0, 'YSP')
  .setWidget(6, 1,ysp)
  .setText(7, 0, 'Closing Cost Credit')
  .setWidget(7, 1, closingcostcredit)
  .setText(8, 0, 'LTV')
  .setWidget(8, 1, ltv)
  .setText(9, 0, 'Impounds')
  .setWidget(9, 1,impound)  
  .setText(10, 0, 'Point File')
  .setWidget(10, 1, upLoad.addChangeHandler(cliHandler3).addChangeHandler(cliHandler2))
  .setText(11, 0, 'Credit Report')
  .setWidget(11, 1, upLoad2.addChangeHandler(cliHandler3).addChangeHandler(cliHandler2))
  .setWidget(12, 0, submitButton)
  .setWidget(12, 1, warning)
  .setWidget(13, 0, uploadtracker)
  .setWidget(13, 1, uploadtracker2)
  .addClickHandler(cliHandler2);

var cliHandler = app.createClientHandler().forTargets(warning).setHTML('<B>PLEASE WAIT WHILE DATA IS BEING UPLOADED TO Google Drive<B>').setStyleAttribute('background','yellow');
submitButton.addClickHandler(cliHandler).setEnabled(false);

panel.add(grid);
app.add(panel);
return app;
}

Editar-para adicionar CliHandler4 Eu atualizei o código para refletir o 4º cliHandler, mas ainda não consigo ativar o botão de envio. Não tenho certeza por que isso está falhando .. Eu olhei várias vezes e não consigo descobrir o que está errado .. Aqui está o código

EDIT como resposta: um widget estava faltando na interface do usuário (mortgageIns)

    var submissionSSKey = 'ID GOES HERE';
    var Panelstyle = {'background':'#c0d6e4','padding':'100px','borderStyle':'ridge','borderWidth':'15PX','borderColor':'#31698a'}


function doGet(e) {
  var app = UiApp.createApplication().setTitle('PCH Mortgage Disclosure Request');
  app.add(app.createImage("http://www.pchmortgage.com/img/logo_thumbnail/6644.png"));
  var instructLabel = app.createHTML('<B><p> </p><p>Be sure to fill in each field completely prior to submitting the Disclsure Request</P></B>');
  app.add(instructLabel);

//Create the FormPanel and Grid for the application  
  var panel = app.createFormPanel().setStyleAttributes(Panelstyle).setPixelSize(450, 300);
  var grid = app.createGrid(15,2).setId('loanGrid');

//Create the Labels, TextBoxes, and Drop downs
    var borrowerTextbox = app.createTextBox().setWidth('150px').setName('borrower');
    var lender = app.createTextBox().setWidth('150px').setName('lender');
    var correspondentBroker = app.createListBox().setName('Correspondent Broker').setWidth('120px').setName('correspondentbroker');
    correspondentBroker.addItem('Select Option');
    correspondentBroker.addItem('Correspondent');
    correspondentBroker.addItem('Broker');
    var loanAmountTextbox = app.createTextBox().setWidth('150px').setName('amount');
    var loanprogram = app.createTextBox().setWidth('150px').setName('program');
    var rate = app.createTextBox().setWidth('150px').setName('rate');
    var ysp = app.createTextBox().setWidth('150px').setName('ysp');
    var closingcostcredit = app.createTextBox().setWidth('150px').setName('credit');
    var ltv = app.createTextBox().setWidth('150px').setName('ltv');
    var impound = app.createListBox().setName('impounds').setWidth('120px').setName('impounds');
    impound.addItem('Select Option');
    impound.addItem('Yes');
    impound.addItem('No');
    var mortgageIns = app.createListBox().setName('Correspondent Broker').setWidth('120px').setName('mortgageinsurance');
    mortgageIns.addItem('Select Option');
    mortgageIns.addItem('MI');
    mortgageIns.addItem('PMI Borrower Paid');
    mortgageIns.addItem('PMI Lender Paid');
    var upLoad = app.createFileUpload().setName('thefile');
    var upLoad2 = app.createFileUpload().setName('thefile2');
    var uploadtracker = app.createTextBox().setVisible(false);
    var uploadtracker2 = app.createTextBox().setVisible(false);
    var submitButton = app.createSubmitButton('<B>Submit</B>');  
    var warning = app.createHTML('Please fill in all fields').setStyleAttribute('background','#9999ff').setStyleAttribute('fontSize','20px');


//Click Handlers are set
  var cliHandler2 = app.createClientHandler().validateLength(borrowerTextbox, 1, 40).validateLength(lender, 1, 40)
  .validateNotMatches(correspondentBroker,'Select Option').validateLength(loanAmountTextbox, 1, 40).validateLength(loanprogram, 1, 40)
  .validateLength(rate, 1, 40).validateLength(ysp, 1, 40).validateLength(closingcostcredit, 1, 40)
  .validateLength(ltv, 1, 40).validateNotMatches(mortgageIns,'Select Option')
  .validateMatches(uploadtracker, 'selected').validateMatches(uploadtracker2, 'selected')
  .forTargets(submitButton).setEnabled(true).forTargets(warning).setHTML('Now you can submit your form')
  .setStyleAttribute('background','#99FF99').setStyleAttribute('fontSize','12px');

  var cliHandler3 = app.createClientHandler().forTargets(uploadtracker).setText('selected')
  var cliHandler4 = app.createClientHandler().forTargets(uploadtracker2).setText('selected')
  //Grid layout of items on form
  grid.setText(0, 0, 'Borrower Name')
  .setWidget(0, 1, borrowerTextbox)
  .setText(1, 0, "Lender")
  .setWidget(1, 1, lender)
  .setText(2, 0, 'Correspondent or Broker')
  .setWidget(2, 1, correspondentBroker)
  .setText(3, 0, 'Loan Amount')
  .setWidget(3, 1, loanAmountTextbox)
  .setText(4, 0, 'Loan Program')
  .setWidget(4, 1, loanprogram)  
  .setText(5, 0, 'Rate')
  .setWidget(5, 1, rate)  
  .setText(6, 0, 'YSP')
  .setWidget(6, 1,ysp)
  .setText(7, 0, 'Closing Cost Credit')
  .setWidget(7, 1, closingcostcredit)
  .setText(8, 0, 'LTV')
  .setWidget(8, 1, ltv)
  .setText(9, 0, 'Impounds')
  .setWidget(9, 1,impound)  
  .setText(10, 0, 'Mortgage Insurance')
  .setWidget(10, 1,mortgageIns)  
  .setText(11, 0, 'Point File')
  .setWidget(11, 1, upLoad.addChangeHandler(cliHandler3).addChangeHandler(cliHandler2))
  .setText(12, 0, 'Credit Report')
  .setWidget(12, 1, upLoad2.addChangeHandler(cliHandler4).addChangeHandler(cliHandler2))
  .setWidget(13, 0, submitButton)
  .setWidget(13, 1, warning)
  .setWidget(14, 0, uploadtracker)
  .setWidget(14, 1, uploadtracker2)
  .addClickHandler(cliHandler2);

  var cliHandler = app.createClientHandler().forTargets(warning).setHTML('<B>PLEASE WAIT WHILE DATA IS BEING UPLOADED TO GOOGLE DRIVE<B>').setStyleAttribute('background','yellow');
  submitButton.addClickHandler(cliHandler).setEnabled(false);

  panel.add(grid);
  app.add(panel);
  return app;
}

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