if (!(MainTab.selected)) {
    Submit.visible = false;
    Cancel.visible = false;
} else {
   Submit.visible = true;
   Cancel.visible = true;
}

 Submit.visible = Cancel.visible = (MainTab.selected);

...

You can build forms/flows In that meet Section 508 and WCAG 2.0 accessibility standards. Accessible forms/flows can assist users with visual and motor impairments. When the Accessible property is enabled for a form/flow, the error, "You can't leave this empty <control name>"  displays, if users move ahead from a required field without filling it. The status property for the empty control becomes invalid and sets the error message. Normally, the status property can be used in a business rule. For example, let's say a form has a text control named 't', and a message control named "m". If you write a rule to update the message field (control named m) with the STATUS of the required/invalid control (control named t), as shown below, it will not work because the "You can't leave this empty" message for a required control is not treated as it's status.

if(!t.valid)
  {
    m.value = t.status;
  }

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 You may want to calculate a date in a workflow based on a five day work week. This is a common business scenario and may be helpful if you are using the Escalations feature. It is not possible to select calendar or working days for the Days interval of the Escalation feature at this time but this enhancement is planned for a future release. As a work-around, you can calculate X number of working days from the current date, and set that date in a Date control on your form. Then while configuring escalations, use the ‘Complete By’ condition and select the Date control.

Here is the business function/rule that will add 3 working days to the current date to give you the escalation date. Copy/paste the entire rule including the function in the Rule Editor. Substitute the name of your date control for <your date control>:

 function calcWorkingDays(fromDate, days) {
    var count = 0;
    while (count < days) {
        fromDate.setDate(fromDate.getDate() + 1);
      if (fromDate.getDay() !== 0 && fromDate.getDay() !== 6) {  // Skip weekends
            count++;
      }
    }
    return fromDate;
}
 
if (form.load && <your date control>.value.length === 0){
  var numWorkingDays = 3; 
  var today = frevvo.currentDate().split('-');
  var escDate = calcWorkingDays(new Date(today[0], today[1]-1, today[2]), numWorkingDays);
  var m = escDate.getMonth() + 1;
  var d = escDate.getDate();
  var y = escDate.getFullYear();
  <your date control>.value = m + '-' + d + '-' + y;
}

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Imagine an airline reservation form where the number of traveler information sections displayed or the number of rows in a table is based on the number of airline tickets purchased. There is a field in the form for the number of tickets named count and a repeat with a section including controls to collect information about each traveler. You can leave the default values for the Min/Max properties of the Section in the Forms designer or set them to any values provided the min value < max value and the max value  > min value.

This is an example of a business rule that displays the number of sections based on the number of purchased airline tickets. Min/Max for the section are set to 1 and 20 in the forms designer.

var i;
if (TravelRepeat.itemAdded) {
    i = TravelRepeat.itemIndex;
    TravelNo[i].value = 1 + i;
} else {
    if (count.value > TravelNo.value.length){
        TravelRepeat.maxOccurs = count.value;
        TravelRepeat.minOccurs = count.value;
    } else {
        TravelRepeat.minOccurs = count.value;
        TravelRepeat.maxOccurs = count.value;
    }
    for (i=0; i<TravelNo.value.length;i++) {
        TravelNo[i].value = 1 + i;
    }
} 

...

1. The first part of your rule should retrieve the results set (this part of the rule is not shown here). In this example, the user enters a number in the Number of Travelers field in the form.
2. The itemAdded statement is needed to determine if you are adding more sections. The first time the rule runs, this statement will evaluate as false and run the else statement
3. Evaluate if the number of sections needed is greater than the number or existing sections. If true, set the maxoccurs first because the table needs to increase.
4. if the number of sections needed is less than the number of existing sections then set the minoccurs first.
5. The rule will loop through the existing sections and set the values in the TravelNo field. If there are still additional sections to be added after the rule has looped through the existing sections, the itemAdded lines will run.
6. This rule sets the Min/Max properties to he same values so the plus and minus icons are not visible. This prevents users from adding repeating items.

Entering "5" as the number of travelers, sets the minOccurs and maxOccurs to 5 and shows 5 information sections.

Repeat Item Initialization

...

If you click on the Rule Code to see the JavaScript generated by the Rule Builder, you will notice:

• The individual rows inside the CustomerTable are referred to in the rule as CustomerTableItem.
• Notice the TableItem deletable property is set to false when a lowercase or capital Y is entered in the first column. This will remove the minus icon for that row of the table. The for loop cycles through the table rows until the Max# property is reached.
  
  

  var event = form.load;
for (let i = 0; i < ContactCustomer.value.length; i++) {
  if ((ContactCustomer[i].value === 'Y') || (ContactCustomer[i].value === 'y')) {
    CustomerTableItem[i].deletable = false;
  } else {
    CustomerTableItem[i].deletable = true;
  }
}

...

var i;
if (TableRepeat.itemAdded) {
    i = TableRepeat.itemIndex;
    TravelID[i].value = 1 + i;
} else {
    if (count.value > TravelID.value.length){
        Table.maxOccurs = count.value;
        Table.minOccurs = count.value;
    } else {
        Table.minOccurs = count.value;
        Table.maxOccurs = count.value;
    }
    for (i=0; i<TravelID.value.length;i++) {
        TravelID[i].value = 1 + i;
    }
} 

The images show the table when the user enters 5 as the number of travelers and then changes the value to 3.

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If you are using the frevvo Database Connector to work with and an external database, you can generate unique sequential ids with a database table, a stored procedure and a business rule. Refer to this Generate Unique Sequential Id example for the details.

Upload Control

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A rule can dynamically display an image uploaded to your form via the upload control. In this example the upload control is named 'u'. The form also must contain a message control as a place holder for displaying the uploaded image. The rule dynamically creates a URL to the uploaded image in the temporary attachment repository. The upload control's value 'u.value' is a GUID that uniquely identifies the attachment. The uploaded image will be included in the submission PDF.

if (u.value.length > 0) {
  var baseUrl = "/frevvo/web/tn/" +
      _data.getParameter('tn.id') +
      "/user/"+_data.getParameter('user.id') +
      "/app/"+_data.getParameter('app.id') +
      "/form/"+_data.getParameter('form.id');
 
  im.value = '<img src="' +
         baseUrl + '/attachment/' + u.value+'/does_not_matter"/>';
}

...