Basic Mortgage Calculator with Rule Engine Feedback

Mortgage Calculator - Rule Engine Feedback Sample

This sample builds on the Basic sample, but adds how to get the Rule Execution Log and process Notifications and Validations.

<script src="MortgageCalculator.min.js"></script>
 <script language="javascript">
 function runRules() {
 // make JavaScript object to pass to InRule 
 var mortgage = {};
 mortgage.LoanInfo = {};
 mortgage.LoanInfo.Principal = document.getElementById('loanAmount').value;
 mortgage.LoanInfo.APR = document.getElementById('apr').value;
 mortgage.LoanInfo.TermInYears =
document.getElementById('termInYears').value;
 // run rules, entity is not used here, but is available if needed
 var session = inrule.createRuleSession();
 var entity = session.createEntity('Mortgage', mortgage);
 session.applyRules(function(log){
 if(!log.hasErrors){
 // write exec log, notifications and validations to form
 document.getElementById('log').value = log.messages.join('\n');
 document.getElementById('notifications').value =
session.getActiveNotifications().map(function(x){return x.message}).join('\n');
 document.getElementById('validations').value =
session.getActiveValidations().map(function(x){return x.message}).join('\n');
 // get data from updated JavaScript object and write back to form
 document.getElementById('montlyPayment').value =
mortgage.PaymentSummary.MonthlyPayment.toFixed(2);
 document.getElementById('totalCost').value =
mortgage.PaymentSummary.TotalCost.toFixed(2);
 }
 else{
 document.getElementById('errors').value =
log.runtimeErrors.join('\n');
 }
 });
 }
 </script>