Honest Lending

' ); } // Get the amount, rate(s), and term - and clean the values var amount = get_field( elem, options, "amount" ); var rate = get_field( elem, options, "rate" ); var term = get_field( elem, options, "term" ); // If we're in comparison mode, grab an additiona field/value. if ( options.mode=="compare" ) var rate_compare = get_field( elem, options, "rate_compare" ); // If we are using the default results div and it doesn't exist, create it. var output_elem; if ( options.response_output_div === ".results" ) if ( elem.find(".results").length === 0 ) elem.append('

'); // Set the output div as a variable so we can refer to it more easily. output_elem = elem.find(".results"); else // Set the output div as a variable so we can refer to it more easily. output_elem = $(options.response_output_div);

// Set the calculation method based on which mode we're in. var calculation_method; switch ( options.mode ) case "basic": calculation_method = calculateBasic; break; case "compare": calculation_method = calculateComparison; break; case "amortization": calculation_method = calculateAmortization; break; // Get the information about the loan. calculation_method( elem, options, output_elem ); // Do some different things if the operation mode is "button" if ( options.operation=="button" ) // If we are using button operation mode and the button doesn't exist, create one. if ( elem.find("button").length === 0 && elem.find("input[type=submit]").length === 0 && elem.find("input[type=image]").length === 0 ) elem.find(".form").append(''); // If the developer has chosen to bind to a button instead // of operate on keyup, let's set up a click event binding // that performs the calculation. elem.find("button, input[type=submit], input[type=image]").each(function() $(this).click(function( event ) event.preventDefault(); calculation_method( elem, options, output_elem ); ); ); else // Bind to the select and input elements so that we calculate // on keyup (or change in the case of the select list). elem.find("input, select").each(function() $(this).bind( "keyup change", function() calculation_method( elem, options, output_elem ); ); ); // If the developer has chosen to bind to a button instead // of operate on keyup, let's set up a click event binding // that performs the calculation. elem.find("form").each(function() $(this).submit(function(event) event.preventDefault(); calculation_method( elem, options, output_elem ); ); ); }); } }); // DEFAULTS // Set up some default options for our plugin that can be overridden // as needed when we actually instantiate our plugin on a form. $.fn.accrue.options = mode: "basic", operation: "keyup", default_values: amount: "$7,500", rate: "7%", rate_compare: "1.49%", term: "36m" , field_titles: amount: "Loan Amount:", rate: "Rate (APR):", rate_compare: "Comparison Rate:", term: "Term:" , button_label: "Calculate", field_comments: amount: "", rate: "", rate_compare: "", term: "Format: 12m, 36m, 3y, 7y" , response_output_div: ".results", response_basic: '

', response_compare: '

Save $%savings% in interest!

', error_text: '

Please fill in all fields.

', callback: function ( elem, data ) ; // FORMAT MONEY // This function is used to add thousand seperators to numerical ouput // as a means of properly formatting money function formatNumber (num) return num.toString().replace(/(\d)(?=(\d3)+(?!\d))/g, "$1,"); // GET FIELD // A function just for grabbing the value from a particular field. // We need this because if the field doesn't exist, the plugin will // create it for them. var get_field = function( elem, options, name ) // Check for an input with a class of the name. var field; if ( elem.find(".accrue-"+name).length ) // if has a class of accrue-[name] field = elem.find(".accrue-"+name); else if ( elem.find("."+name).length ) // if we have class of just the name field = elem.find("."+name); else if ( elem.find( "input[name~="+name+"]" ).length ) elem.find( "input[name~="+name+"]" ); else field = ""; // If we have the field value, return it right away so that the // calculator doesn't write the field to the form div since we // don't need it to. if ( typeof( field ) !== "string" ) return field.val(); if ( name == "term_compare" ) return false; // If we've gotten here, no fields were found that match the // criteria. Create the form field and return the default value. elem.find(".form").append( '

'); return elem.find("."+name).val(); ; // CALCULATE BASIC // for the basic calculation, we're just getting the values and // calculating loan info for a single loan. var calculateBasic = function( elem, options, output_elem ) // get the loan information from the current values in the form. var loan_info = $.loanInfo( amount: get_field( elem, options, "amount" ), rate: get_field( elem, options, "rate" ), term: get_field( elem, options, "term" ) ); // if valid, output into the output_elem that was passed into this function. if ( loan_info!==0 ) // replace the placeholders with the response values. var output_content = options.response_basic .replace( "%payment_amount%", formatNumber(loan_info.payment_amount_formatted) ) .replace( "%num_payments%", loan_info.num_payments ) .replace( "%total_payments%",formatNumber(loan_info.total_payments_formatted) ) .replace( "%total_interest%", formatNumber(loan_info.total_interest_formatted) ); // output the content to the actual output element. output_elem.html( output_content ); else // if the values for the loan calculation aren't valid, provide an error. output_elem.html( options.error_text ); // run the callback function after the calculation is done, including // the calculation info so it's available in the callback. options.callback( elem, loan_info ); ; // CALCULATE COMPARE // The comparison mode gets 4 values from the form and calculates, then // compares two different loans to determine savings in interest. var calculateComparison = function( elem, options, output_elem ) // see if there's a comparison term var term_compare = get_field( elem, options, "term_compare" ); // if the comparison term is empty, use the normal term field if ( typeof( term_compare ) == "boolean" ) term_compare = get_field( elem, options, "term" ); // Get information about the two different loans in question // and create a callback data variable that we'll pass into // our callback function. var loan_1_info = $.loanInfo( amount: get_field( elem, options, "amount" ), rate: get_field( elem, options, "rate" ), term: get_field( elem, options, "term" ) ), loan_2_info = $.loanInfo( amount: get_field( elem, options, "amount" ), rate: get_field( elem, options, "rate_compare" ), term: term_compare ), callback_data = loan_1: loan_1_info, loan_2: loan_2_info ; // If both loans are good, populate response element with info, // else error. if ( loan_1_info!==0 && loan_2_info!==0 ) if ( loan_1_info.total_interest-loan_2_info.total_interest > 0 ) callback_data.savings = loan_1_info.total_interest-loan_2_info.total_interest; else callback_data.savings = 0; // replace our savings placeholder in the response text with // the real difference in interest. var output_content = options.response_compare .replace( "%savings%", formatNumber(callback_data.savings.toFixed(2)) ) .replace( "%loan_1_payment_amount%", formatNumber(loan_2_info.payment_amount_formatted) ) .replace( "%loan_1_num_payments%", loan_2_info.num_payments ) .replace( "%loan_1_total_payments%", loan_2_info.total_payments_formatted ) .replace( "%loan_1_total_interest%", formatNumber(loan_2_info.total_interest_formatted) ) .replace( "%loan_2_payment_amount%", formatNumber(loan_1_info.payment_amount_formatted) ) .replace( "%loan_2_num_payments%", loan_1_info.num_payments ) .replace( "%loan_2_total_payments%", loan_1_info.total_payments_formatted ) .replace( "%loan_2_total_interest%", formatNumber(loan_1_info.total_interest_formatted) ); output_elem.html( output_content ); else // output an error output_elem.html( options.error_text ); // run the callback, passing our loan data into it. options.callback( elem, callback_data ); ; // CALCULATE AMORTIZATION SCHEDULE // This method outputs a table with the repayment schedule // for a single loan object. var calculateAmortization = function( elem, options, output_elem ) // Get the loan information so we can build out our amortization // schedule table. var loan_info = $.loanInfo( amount: get_field( elem, options, "amount" ), rate: get_field( elem, options, "rate" ), term: get_field( elem, options, "term" ) ); // If the loan info's good, start buildin'! if ( loan_info!==0 ) // Set some initial variables for the table header, interest // per payment, amount from balance, and counter variables // to values as we list rows. var output_content = '

'; // Push our output content into the output element. output_elem.html( output_content ); else // Values aren't good yet, show the error. output_elem.html( options.error_text ); // Execute callback, passing in loan information. options.callback( elem, loan_info ); ; // BASIC LOGGING FUNCTION // Checks to see if the console is available before outputting // anything through console.log(). Prevent issues with IE. var log = function( message ) if ( window.console ) console.log( message ); ; // GENERAL LOAN INFORMATION FUNCTION // This is the public function we use inside our plugin function // and we're exposing it here so that we can also provide generic // calculations that just return JSON objects that can be used // for custom-developed plugins. $.loanInfo = function( input ) var amount = ( typeof( input.amount )!=="undefined" ? input.amount : 0 ).toString().replace(/[^\d.]/ig, ''), rate = ( typeof( input.rate )!=="undefined" ? input.rate : 0 ).toString().replace(/[^\d.]/ig, ''), term = ( typeof( input.term )!=="undefined" ? input.term : 0 ); // parse year values passed into the term value if ( term.match("y") ) term = parseInt( term.replace(/[^\d.]/ig, ''), 10 )*12; else term = parseInt( term.replace(/[^\d.]/ig, ''), 10 ); // process the input values var monthly_interest = rate / 100 / 12; // Now compute the monthly payment amount. var x = Math.pow(1 + monthly_interest, term), monthly = (amount*x*monthly_interest)/(x-1); // If the result is a finite number, the user's input was good and // we have meaningful results to display if ( amount*rate*term>0 ) // Fill in the output fields, rounding to 2 decimal places return original_amount: amount, payment_amount: monthly, payment_amount_formatted: monthly.toFixed(2), num_payments: term, total_payments: ( monthly * term ), total_payments_formatted: ( monthly * term ).toFixed(2), total_interest: ( ( monthly * term ) - amount ), total_interest_formatted: ( ( monthly * term ) - amount ).toFixed(2) ; else // The numbers provided won't provide good data as results, // so we'll return 0 so it's easy to test if one of the fields // is empty or invalid. return 0; ; // REVERSE LOAN INFORMATION FUNCTION // This is a copy of the above, only that given a payment amount, rate and term it // will return the principal amount that can be borrowed. $.loanAmount = function( input ) var payment = ( typeof( input.payment )!=="undefined" ? input.payment : 0 ).toString().replace(/[^\d.]/ig, ''), rate = ( typeof( input.rate )!=="undefined" ? input.rate : 0 ).toString().replace(/[^\d.]/ig, ''), term = ( typeof( input.term )!=="undefined" ? input.term : 0 ); // parse year values passed into the term value if ( term.match("y") ) term = parseInt( term.replace(/[^\d.]/ig, ''), 10 )*12; else term = parseInt( term.replace(/[^\d.]/ig, ''), 10 ); // process the input values var monthly_interest = rate / 100 / 12, annual_interest = rate / 100; // Now compute. var x = payment * (1 - Math.pow(1 + monthly_interest, -1 * term)) * (12/(annual_interest)); // If the result is a finite number, the user's input was good and // we have meaningful results to display if ( x>0 ) // Fill in the output fields, rounding to 2 decimal places return principal_amount: x, principal_amount_formatted: ( x * 1 ).toFixed(2), payment_amount: payment, payment_amount_formatted: ( payment * 1 ).toFixed(2), num_payments: term, total_payments: ( payment * term ), total_payments_formatted: ( payment * term ).toFixed(2), total_interest: ( ( payment * term ) - x ), total_interest_formatted: ( ( payment * term ) - x ).toFixed(2) ; else // The numbers provided won't provide good data as results, // so we'll return 0 so it's easy to test if one of the fields // is empty or invalid. return 0; ; })( jQuery, window, document ); })(jQuery);