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/** |
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* Payment Manager for Easy Invoice |
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* Handles payment calculations, discounts, and tax calculations |
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*/ |
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(function($) { |
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'use strict'; |
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|
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// Payment Manager object |
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window.EasyInvoicePayment = { |
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// Default settings |
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settings: { |
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discountType: 'none', // none, percentage or fixed |
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discountValue: 0, |
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taxRate: 0, |
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calculationMethod: 'before_tax', // before_tax or after_tax |
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pricesIncludeTax: 'no', // yes or no |
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currency: 'USD', |
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currencySymbol: '$' |
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}, |
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|
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// Initialize the payment manager |
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init: function() { |
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|
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|
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// Load settings from form fields first (preserves PHP-set values) |
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this.loadSettingsFromForm(); |
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|
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// Then override with localized data if available |
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if (typeof easyInvoicePayment !== 'undefined') { |
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this.settings.discountType = easyInvoicePayment.discountType || this.settings.discountType; |
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this.settings.discountValue = parseFloat(easyInvoicePayment.discountValue) || this.settings.discountValue; |
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this.settings.taxRate = parseFloat(easyInvoicePayment.taxRate) || this.settings.taxRate; |
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this.settings.calculationMethod = easyInvoicePayment.calculationMethod || this.settings.calculationMethod; |
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this.settings.currency = easyInvoicePayment.currency || this.settings.currency; |
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this.settings.currencySymbol = easyInvoicePayment.currencySymbol || this.settings.currencySymbol; |
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} |
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|
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// Set up event handlers |
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this.setupEventHandlers(); |
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|
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// Update totals (but don't overwrite field values) |
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this.updateTotals(); |
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}, |
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|
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// Load settings from form fields |
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loadSettingsFromForm: function() { |
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// Read values from form fields if they exist |
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var discountType = $('#discount_type').val(); |
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if (discountType) { |
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this.settings.discountType = discountType; |
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} |
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|
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var discountValue = parseFloat($('#discount_value').val()); |
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if (!isNaN(discountValue)) { |
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this.settings.discountValue = discountValue; |
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} |
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|
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var taxRate = parseFloat($('#tax_rate').val()); |
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if (!isNaN(taxRate)) { |
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this.settings.taxRate = taxRate; |
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} |
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|
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var calculationMethod = $('select[name="discount_calculation_method"]').val(); |
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if (calculationMethod) { |
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this.settings.calculationMethod = calculationMethod; |
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} |
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|
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var pricesIncludeTax = $('select[name="prices_include_tax"]').val(); |
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if (pricesIncludeTax) { |
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this.settings.pricesIncludeTax = pricesIncludeTax; |
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} |
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|
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var currency = $('#currency').val(); |
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if (currency) { |
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this.settings.currency = currency; |
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} |
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}, |
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|
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// Set up event handlers for payment-related elements |
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setupEventHandlers: function() { |
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var self = this; |
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|
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// Discount type change |
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$('#discount_type').on('change', function() { |
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self.settings.discountType = $(this).val(); |
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self.updateTotals(); |
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}); |
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|
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// Discount value change |
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$('#discount_value').on('input', function() { |
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self.settings.discountValue = parseFloat($(this).val()) || 0; |
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self.updateTotals(); |
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}); |
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|
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// Tax rate change |
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$('#tax_rate').on('input', function() { |
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self.settings.taxRate = parseFloat($(this).val()) || 0; |
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self.updateTotals(); |
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}); |
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|
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// Calculation method change |
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$('select[name="discount_calculation_method"]').on('change', function() { |
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self.settings.calculationMethod = $(this).val(); |
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self.updateTotals(); |
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}); |
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|
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// Prices include tax change |
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$('select[name="prices_include_tax"]').on('change', function() { |
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self.settings.pricesIncludeTax = $(this).val(); |
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self.updateTotals(); |
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}); |
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|
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// Currency change |
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$('#currency_code').on('change', function() { |
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self.settings.currency = $(this).val(); |
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|
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// Get the currency symbol for the selected currency |
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switch($(this).val()) { |
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case 'USD': |
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self.settings.currencySymbol = '$'; |
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break; |
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case 'EUR': |
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self.settings.currencySymbol = '€'; |
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break; |
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case 'GBP': |
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self.settings.currencySymbol = '£'; |
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break; |
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default: |
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self.settings.currencySymbol = '$'; |
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} |
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|
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self.updateTotals(); |
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}); |
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}, |
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|
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// Update UI with current settings |
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updateUI: function() { |
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// Only set form field values if they are empty or if we have explicit settings |
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// This preserves values set by PHP/HTML |
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if (!$('#discount_type').val()) { |
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$('#discount_type').val(this.settings.discountType); |
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} |
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if (!$('#discount_value').val()) { |
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$('#discount_value').val(this.settings.discountValue); |
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} |
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if (!$('#tax_rate').val()) { |
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$('#tax_rate').val(this.settings.taxRate); |
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} |
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if (!$('input[name="calculation_method"]:checked').val()) { |
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$('input[name="calculation_method"][value="' + this.settings.calculationMethod + '"]').prop('checked', true); |
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} |
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if (!$('#currency_code').val()) { |
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$('#currency_code').val(this.settings.currency); |
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} |
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|
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// Update totals |
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this.updateTotals(); |
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}, |
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|
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// Update totals based on invoice items and settings |
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updateTotals: function() { |
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// Calculate subtotal from invoice items |
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var subtotal = 0; |
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var taxableSubtotal = 0; |
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|
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// Get items from invoice builder if available |
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if (window.EasyInvoiceBuilder && typeof window.EasyInvoiceBuilder.getItems === 'function') { |
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var items = window.EasyInvoiceBuilder.getItems(); |
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|
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items.forEach(function(item) { |
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var baseTotal = item.quantity * item.price; |
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var adjustPercentage = 0; |
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// Only apply adjust percentage if the adjust field is enabled |
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if (window.easyInvoice && window.easyInvoice.showAdjustField) { |
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adjustPercentage = parseFloat(item.adjust_percentage) || 0; |
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} |
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var itemTotal = baseTotal * (1 + adjustPercentage / 100); |
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subtotal += itemTotal; |
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|
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if (item.taxable) { |
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taxableSubtotal += itemTotal; |
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} |
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}); |
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} else { |
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// Fallback: Calculate directly from DOM using dynamic field helpers |
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$('.invoice-item, .quote-item').each(function(index) { |
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var $item = $(this); |
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|
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// Use dynamic field helpers if available |
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if (window.EasyInvoiceFieldHelpers) { |
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var quantity = parseFloat(window.EasyInvoiceFieldHelpers.getFieldValue('quantity', $item)) || 0; |
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var price = parseFloat(window.EasyInvoiceFieldHelpers.getFieldValue('price', $item)) || 0; |
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var adjustPercentage = 0; |
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// Only apply adjust percentage if the adjust field is enabled |
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if (window.easyInvoice && window.easyInvoice.showAdjustField) { |
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adjustPercentage = parseFloat(window.EasyInvoiceFieldHelpers.getFieldValue('adjust_percentage', $item)) || 0; |
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} |
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var baseTotal = quantity * price; |
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var itemTotal = baseTotal * (1 + adjustPercentage / 100); |
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var isTaxable = window.EasyInvoiceFieldHelpers.getFieldValue('taxable', $item) === '1'; |
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|
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subtotal += itemTotal; |
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|
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if (isTaxable) { |
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taxableSubtotal += itemTotal; |
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} |
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} else { |
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// Fallback to hardcoded field names |
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var quantity = parseFloat($(this).find('input[name*="[quantity]"]').val()) || 0; |
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var price = parseFloat($(this).find('input[name*="[price]"]').val()) || 0; |
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var adjustPercentage = 0; |
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// Only apply adjust percentage if the adjust field is enabled |
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if (window.easyInvoice && window.easyInvoice.showAdjustField) { |
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adjustPercentage = parseFloat($(this).find('input[name*="[adjust_percentage]"]').val()) || 0; |
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} |
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var baseTotal = quantity * price; |
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var itemTotal = baseTotal * (1 + adjustPercentage / 100); |
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var isTaxable = $(this).find('input[name*="[taxable]"]').is(':checked'); |
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|
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subtotal += itemTotal; |
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|
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if (isTaxable) { |
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taxableSubtotal += itemTotal; |
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} |
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} |
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}); |
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} |
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|
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// Calculate discount amount |
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var discountAmount = 0; |
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if (this.settings.discountType === 'none') { |
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discountAmount = 0; |
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} else if (this.settings.discountType === 'percentage') { |
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discountAmount = subtotal * (this.settings.discountValue / 100); |
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} else { // fixed amount |
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discountAmount = Math.min(this.settings.discountValue, subtotal); // Don't discount more than subtotal |
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} |
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|
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// Calculate after discount amount |
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var afterDiscountAmount = subtotal - discountAmount; |
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|
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// Calculate tax amount |
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var taxAmount = 0; |
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var total = 0; |
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var pricesIncludeTax = this.settings.pricesIncludeTax === 'yes'; |
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var discountRatio = (subtotal > 0) ? (discountAmount / subtotal) : 0; |
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|
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if (pricesIncludeTax && this.settings.taxRate > 0) { |
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// Tax is already included in prices: extract it from the taxable portion after discount |
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var taxableAfterDiscount = taxableSubtotal * (1 - discountRatio); |
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taxAmount = taxableAfterDiscount - (taxableAfterDiscount / (1 + this.settings.taxRate / 100)); |
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total = afterDiscountAmount; |
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} else if (this.settings.taxRate > 0) { |
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if (this.settings.calculationMethod === 'before_tax') { |
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// Discount first, then tax on remaining taxable amount |
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var taxableAfterDiscount = taxableSubtotal * (1 - discountRatio); |
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taxAmount = taxableAfterDiscount * (this.settings.taxRate / 100); |
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} else { // after_tax |
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// Tax first on full taxable subtotal, then discount |
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taxAmount = taxableSubtotal * (this.settings.taxRate / 100); |
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// Recalculate percentage discount based on total including tax |
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if (this.settings.discountType === 'percentage') { |
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var totalBeforeDiscount = subtotal + taxAmount; |
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discountAmount = (totalBeforeDiscount * this.settings.discountValue) / 100; |
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afterDiscountAmount = subtotal - discountAmount; |
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} |
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} |
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total = afterDiscountAmount + taxAmount; |
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} else { |
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total = afterDiscountAmount; |
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} |
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|
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// Update UI |
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$('#subtotal_value').text(this.formatCurrency(subtotal)); |
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$('#discount_amount_value').text(this.formatCurrency(discountAmount)); |
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$('#after_discount_value').text(this.formatCurrency(afterDiscountAmount)); |
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$('#tax_amount_value').text(this.formatCurrency(taxAmount)); |
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$('#total_value').text(this.formatCurrency(total)); |
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|
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// Update hidden fields for form submission |
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$('#subtotal_field').val(subtotal); |
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$('#discount_amount_field').val(discountAmount); |
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$('#tax_amount_field').val(taxAmount); |
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$('#total_field').val(total); |
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}, |
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|
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// Format currency value |
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formatCurrency: function(value) { |
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return this.settings.currencySymbol + parseFloat(value).toFixed(2); |
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}, |
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|
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// Get payment settings for saving |
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getPaymentSettings: function() { |
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return { |
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discountType: this.settings.discountType, |
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discountValue: this.settings.discountValue, |
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taxRate: this.settings.taxRate, |
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calculationMethod: this.settings.calculationMethod, |
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currency: this.settings.currency, |
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currencySymbol: this.settings.currencySymbol |
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}; |
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} |
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}; |
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|
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// Initialize payment manager when document is ready |
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$(document).ready(function() { |
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EasyInvoicePayment.init(); |
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}); |
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|
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})(jQuery); |
