https://www.realtormikemahoney.com/wp/wp-content/themes/ixact/js/lib/mclidd.js?ver=1.0.1

1/**
2 * Get this, they created that JavaScript while the plugin was having problems in 2015. That JavaScript performs
3 * ALL of the calculator functions so technically, the mortgage calculator plugin is not actually used. If I build out
4 * an identical form and drop it in the JavaScript is the thing that handles everything. The plugin never actually sees
5 * the light of day aside from outputting the form on the front end.
6 *
7 * Their plan was to remove the JS when the plugin was working again but they just never did.
8 *
9 * TL;DR The responsive mortgage calculator plugin has only ever been used to output a form on the front end and we've
10 * just been overriding the functionality with JS because no one ever removed the "temporary" fix from 5 years ago.
11 *
12 * https://artscience.atlassian.net/browse/IC-544
13 * https://bitbucket.org/artscience/ixact-wam-wordpress/commits/ac68419128e428e9f12f43a4624ec0ee49339526
14 */
15jQuery(document).ready(function() {
16    
17    // Get the results divs.
18    detailsDiv = jQuery('#lidd_mc_details');
19    resultDiv = jQuery('#lidd_mc_results');
20    summaryDiv = jQuery('#lidd_mc_summary');
21    
22    jQuery(".lidd_mc_form").submit(function(event) {
23        
24        // Prevent the form from being submitted.
25        event.preventDefault();
26        
27        // Formatting function for outputting numbers with commas.
28        function numberWithCommas(x) {
29            return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
30        }
31        
32        // Formatting function for currency codes
33        function validateCurrencyCode(code) {
34            return code.replace(/[^A-Za-z]/, "");
35        }
36        
37        // Initialize variables.
38        var error = false; // Marker. Assume there is an error.
39        var period; // Store the payment period.
40        var showSummary = false; // Record whether the summary is displayed or not.
41        
42        // Get variables.
43        var ta = jQuery('#lidd_mc_total_amount').val();
44        var dp = jQuery('#lidd_mc_down_payment').val();
45        var ir = jQuery('#lidd_mc_interest_rate').val();
46        var am = jQuery('#lidd_mc_amortization_period').val();
47        var pp = jQuery('#lidd_mc_payment_period option:selected').val();
48        var cp = jQuery('#lidd_mc_compounding_period').val();
49        var currency = jQuery('#lidd_mc_currency').val();
50        var currency_code = jQuery('#lidd_mc_currency_code').val();
51        
52        // Get the error reporting spans.
53        var ta_error = jQuery('#lidd_mc_total_amount-error');
54        var dp_error = jQuery('#lidd_mc_down_payment-error');
55        var ir_error = jQuery('#lidd_mc_interest_rate-error');
56        var am_error = jQuery('#lidd_mc_amortization_period-error');
57        
58        // Make sure the results divs are in their default states.
59        detailsDiv.hide();
60        resultDiv.html('');
61        summaryDiv.html('');
62        
63        // ********************** //
64        // ***** VALIDATION ***** //
65        
66        // A function to trigger an error.
67        function triggerError(element, message) {
68            error = true;
69            element.text(message);
70            element.addClass('lidd_mc_error');
71        }
72        
73        // A function to remove an error.
74        function removeError(element) {
75            element.text('');
76            element.removeClass('lidd_mc_error');
77        }
78        
79        // Make sure total amount * 100 is an integer, or round it to one.
80        if (jQuery.isNumeric(+ta) && ta > 0) {
81            ta = Math.abs(Math.round((+ta) * 100) / 100);
82            removeError(ta_error);
83        } else {
84            triggerError(ta_error, 'Please enter the total amount of the mortgage.');
85        }
86        // Down payment. If it is set, it must be less than the total amount.
87        if (+dp == 0 || (jQuery.isNumeric(+dp) && +dp < ta)) {
88            dp = Math.abs(Math.round((+dp) * 100) / 100);
89            removeError(dp_error);
90        } else {
91            triggerError(dp_error, 'Please enter a down payment amount or leave blank.');
92        }
93        // Interest rate. Positve value less than 100%. Leaves room for loan sharks.
94        if (jQuery.isNumeric(+ir) && (+ir) < 100 && (+ir) > 0) {
95            ir = +ir;
96            removeError(ir_error);
97        } else {
98            triggerError(ir_error, 'Please enter an interest rate.');
99        }
100        // Validate the payment period, just in case.
101        switch (pp) {
102            case '52':
103                pp = 52;
104                period = 'Weekly';
105                break;
106            case '26':
107                pp = 26;
108                period = 'Bi-Weekly';
109                break;
110            default:
111                pp = 12;
112                period = 'Monthly';
113                break;
114        }
115        // Amortization period. 50 years is absurdly long, but meh...
116        if (jQuery.isNumeric(+am) && Math.abs(+am) < 50 && (+am) !== 0) {
117            // The amortization period needs to fit nicely with the payment periods if there are decimals.
118            am = Math.abs(Math.ceil((+am) * pp) / pp);
119            removeError(am_error);
120        } else {
121            triggerError(am_error, 'Please enter an amortization period.');
122        }
123        // Compounding period
124        switch (cp) {
125            case '1':
126                cp = 1;
127                break;
128            case '2':
129                cp = 2;
130                break;
131            case '4':
132                cp = 4;
133                break;
134            case '12':
135            default:
136                cp = 12;
137                break;
138        }
139        // Currency
140        switch (currency) {
141            case '€': // Euro
142                currency = '€';
143                break;
144            case '£': // Pound
145                curency = '£';
146                break;
147            case 'Â¥': // Yen
148                currency = 'Â¥';
149                break;
150            case '¤': // Generic
151                currency = '¤';
152                break;
153            case '$': // Dollar
154            default:
155                currency = '$';
156                break;
157        }
158        // Currency Code
159        if (currency_code) {
160            currency_code = validateCurrencyCode(currency_code);
161        } else {
162            currency_code = '';
163        }
164        
165        // ***** END VALIDATION ***** //
166        // ************************** //
167        
168        // If there are no errors, continue with the calculation.
169        if (error === false) {
170            
171            // Calculate the total amount of the loan.
172            var loan = ta - dp;
173            
174            // Calculate the number of payments. This is amortization * payment period
175            var np = am * pp;
176            
177            // Convert the interest rate to a decimal. (Nominal Rate)
178            var rNom = (+ir) / 100;
179            
180            // Calculate the rate per payment period
181            var rPeriod = (Math.pow((1 + (rNom / +cp)), (+cp / pp))) - 1;
182            
183            // Calculate the total interest rate for the duration of the loan.
184            var rFactor = Math.pow((rPeriod + 1), np);
185            
186            // Calculate the payments.
187            var payment = loan * ((rPeriod * rFactor) / (rFactor - 1));
188            
189            // Set the result for output.
190            var result = numberWithCommas(parseFloat(Math.round(payment * 100) / 100).toFixed(2));
191            
192            // Summarize the data.
193            var summary = '<p>For a mortgage of <b class="lidd_mc_b">' + currency + numberWithCommas(parseInt(ta - dp).toFixed(2)) + '</b> amortized over <b class="lidd_mc_b">';
194            // Determine the payment period in years.
195            summary += (Math.floor(am)) + '</b> years';
196            // Check for weeks or months.
197            if ((am - Math.floor(am) > 0)) {
198                var remainder = (np > pp) ? np % pp : pp % np;
199                if (period === 'Monthly') {
200                    summary += ' and <b class="lidd_mc_b">' + remainder + '</b> months';
201                } else if (period === 'Weekly') {
202                    summary += ' and <b class="lidd_mc_b">' + remainder + '</b> weeks';
203                } else {
204                    summary += ' and <b class="lidd_mc_b">' + (remainder * 2) + '</b> weeks';
205                }
206            }
207            summary += ', your <b class="lidd_mc_b">' + period + '</b> payment is:</p>';
208            summary += '<p>Mortgage Payment: <b class="lidd_mc_b">' + currency + result + '</b></p>';
209            summary += '<p>Total Mortgage with Interest: <b class="lidd_mc_b">' + currency + numberWithCommas(parseFloat(Math.round((payment * np) * 100) / 100).toFixed(2)) + '</b></p>';
210            
211            if (dp > 0) {
212                summary += '<p>Total with Down Payment: <b class="lidd_mc_b">' + currency + numberWithCommas(parseFloat(dp + Math.round((payment * np) * 100) / 100).toFixed(2)) + '</b></p>';
213            }
214            
215            // Print to the messaging areas.
216            resultDiv.html('<p>Payments: <b class="lidd_mc_b">' + currency + result + ' ' + currency_code + '</b></p>');
217            summaryDiv.html(summary);
218            
219            // Show the details div.
220            detailsDiv.show();
221            
222            // Show the summary div when the result div is clicked.
223            if (document.getElementById('lidd_mc_inspector') != null) {
224                
225                jQuery('#lidd_mc_inspector').click(function() {
226                    if (showSummary === false) {
227                        summaryDiv.show();
228                        showSummary = true;
229                    } else {
230                        summaryDiv.hide();
231                        showSummary = false;

232                    }
233                });
234                
235            }
236            
237        }
238        
239    });
240    
241});