Preciousomonze · September 29, 2020 03:23
diff --git a/README.md b/README.md
diff --git a/class-wc-free-gift-coupons-admin.php b/class-wc-free-gift-coupons-admin.php
 <?php
 if ( ! defined( 'ABSPATH' ) ) {
 	exit; // Exit if accessed directly
 }

 if ( class_exists( 'WC_Free_Gift_Coupons_Admin' ) ) {
 	WC_Free_Gift_Coupons_Admin::init(); // Run if class exists.
 }

 /**
 * Main Admin Class
 *
 * @class WC_Free_Gift_Coupons_Admin
 * @version	2.0.0
 */
 class WC_Free_Gift_Coupons_Admin {

 	/**
 	 * The plugin version
 	 * 
 	 * @var string
 	 */
 	public static $version = '2.5.2';

 	/** 
 	 * Coupon Product ids list
 	 * 
 	 * @var array
 	 * @since 3.0.0 
 	 */
 	protected static $coupon_product_ids = array();

 	/**
 	 * Initialize
 	 *
 	 * @return WC_Free_Gift_Coupons_Admin
 	 * @since 1.0
 	 */
 	public static function init() {

 		// Admin scripts.
 		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'admin_scripts' ) );
 		
 		// Add and save coupon meta.
 		add_action( 'woocommerce_coupon_options', array( __CLASS__, 'coupon_options' ), 10, 2 );
 		add_action( 'woocommerce_coupon_options_save', array( __CLASS__, 'process_shop_coupon_meta' ), 20, 2 );

 		// Show row meta on the plugin screen.
 		add_filter( 'plugin_row_meta', array( __CLASS__, 'plugin_row_meta' ), 10, 2 );

 	}

 	/**
 	 * Load admin script
 	 *
 	 * @return void
 	 * @since 1.0
 	 */
 	public static function admin_scripts() {

 		// Coupon styles.
 		wp_register_style( 'woocommerce_free_gift_coupon_meta', plugins_url( '../assets/css/free-gift-coupons-meta-box.css' , __DIR__ ), array(), WC_Free_Gift_Coupons::$version );
 			
 		// Coupon script.
 		$suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';
 		wp_register_script( 'woocommerce_free_gift_coupon_meta', plugins_url( '../assets/js/free-gift-coupons-meta-box' . $suffix . '.js' , __DIR__ ), array( 'jquery', 'backbone', 'underscore', 'wp-util', 'jquery-ui-sortable', 'wc-enhanced-select' ), WC_Free_Gift_Coupons::$version, true );

 	}

 	/**
 	 * Load admin script
 	 *
 	 * @param  int $coupon_id
 	 * @return void
 	 * @since 1.0
 	 */
 	public static function load_scripts( $coupon_id = '' ) {

 		// Coupon styles.
 		wp_enqueue_style( 'woocommerce_free_gift_coupon_meta' );
 			
 		// Coupon script.
 		wp_enqueue_script( 'woocommerce_free_gift_coupon_meta' );

 		$translation_array = array(
 				'coupon_types' => wp_json_encode( WC_Free_Gift_Coupons::get_gift_coupon_types() ),
 				'free_gifts' => array_values( WC_Free_Gift_Coupons::get_gift_data( intval( $coupon_id ) ) )
 			);

 		wp_localize_script( 'woocommerce_free_gift_coupon_meta', 'woocommerce_free_gift_coupon_meta_i18n', $translation_array );		

 		// Backbone template.
 		add_action( 'admin_print_footer_scripts', array( __CLASS__, 'print_templates' ) );

 	}

 	/**
 	 * Output the new Coupon metabox fields
 	 *
 	 * @return HTML
 	 * @since 1.0
 	 */
 	public static function coupon_options( $coupon_id, $coupon ) {
 		self::load_scripts( $coupon_id );
 		?>

 		<p class="form-field show_if_free_gift">

 			<label for="free_gift_ids"><?php esc_html_e( 'Free Gifts', 'wc_free_gift_coupons' ) ?></label>

 			<span class="description"><?php esc_html_e( 'These are the products you are giving away with this coupon. They will automatically be added to the cart.', 'wc_free_gift_coupons' ); ?></span>

 		</p>

 		<p class="form-field show_if_free_gift">

 			<span class="add_prompt dashicons-before dashicons-plus"></span>

 			<select id="free_gift_ids" style="width:90%;" class="wc-product-search" name="free_gift_ids" multiple="multiple" data-sortable="sortable" data-placeholder="<?php esc_attr_e( 'Search for a product&hellip;', 'wc_free_gift_coupons' ); ?>" data-action="woocommerce_json_search_products_and_variations">
 				<option></option>
 			</select>			

 		</p>

 		<div id="wc-free-gift-container" class="show_if_free_gift">
 		<table id="wc-free-gift-table"></table>
 			<noscript><?php esc_html_e( 'Javascript is required for product selection to work.', 'wc_free_gift_coupons' );?></noscript>
 		</div>

 		<!-- Sync Quantities -->
 		<p class="form-field show_if_free_gift">

 			<label for="_wc_fgc_product_sync_ids"><?php esc_html_e( 'Sync Quantities', 'wc_free_gift_coupons' ) ?></label>

 			<span class="description"><?php esc_html_e( 'Sync the gift products\' quantities to the qauntity of a product in the cart.', 'wc_free_gift_coupons' ); ?></span>

 		</p>

 		<p class="form-field show_if_free_gift">

 			<span class="add_prompt dashicons-before dashicons-plus"></span>

 			<select id="_wc_fgc_product_sync_ids" style="width:80%;" class="wc-product-search" name="_wc_fgc_product_sync_ids" data-sortable="sortable" data-allow-clear="tru" data-placeholder="<?php esc_attr_e( 'Search for a product&hellip;', 'wc_free_gift_coupons' ); ?>" data-action="woocommerce_json_search_products_and_variations">
 				<option></option>
 				<?php
 				$product_ids = $coupon->get_meta( '_wc_fgc_product_sync_ids', true, 'edit' );

 				foreach ( $product_ids as $row => $product_id ) {
 					$product = wc_get_product( $product_id );
 					if ( is_object( $product ) ) {
 						echo '<option value="' . esc_attr( $product_id ) . '"' . selected( true, true, false ) . '>' . htmlspecialchars( wp_kses_post( $product->get_formatted_name() ) ) . '</option>';
 					}
 				}
 				?>
 			</select>			
 			<?php
 			echo wc_help_tip(
 				__( 'This adds the Synced Product to the required Product List, if it is not already added.', 'wc_free_gift_coupons' )
 			);
 			?>
 		</p>

 		<?php
 		woocommerce_wp_checkbox( array(
 			'id'          => 'wc_fgc_leave_old_synced_products',
 			'value'		  => $coupon->get_meta( '_wc_fgc_leave_old_synced_products', true, 'edit' ),
 			'label'       => __( 'Leave synced products in required product list.', 'wc_free_gift_coupons' ),
 			'description' => __( 'Check this box if you want to keep the previous synced product in the required product list.', 'wc_free_gift_coupons' ),
 			'wrapper_class' => 'show_if_free_gift'
 		) );

 		// Free shipping for free gift.
 		if ( function_exists( 'wc_shipping_enabled' ) && wc_shipping_enabled() ) {
 			woocommerce_wp_checkbox( array(
 				'id'          => 'wc_free_gift_coupon_free_shipping',
 				'value'		  => $coupon->get_meta( '_wc_free_gift_coupon_free_shipping', true, 'edit' ),
 				'label'       => __( 'Free shipping for gift(s)', 'wc_free_gift_coupons' ),
 				'description' => __( 'Check this box if the free gift(s) should not incur a shipping cost. A free shipping method must be enabled.', 'wc_free_gift_coupons' ),
 				'wrapper_class' => 'show_if_free_gift'
 			) );
 		}

 	}

 	/**
 	 * Prints the templates used in the coupon options metabox
 	 *
 	 * @since 2.0.0
 	 */
 	public static function print_templates() {
 		
 		/**
 		 * Backbone Templates
 		 * This file contains all of the HTML used in our application
 		 *
 		 * Each template is wrapped in a script block ( note the type is set to "text/html" ) and given an ID prefixed with
 		 * 'tmpl'. The wp.template method retrieves the contents of the script block and converts these blocks into compiled
 		 * templates to be used and reused in your application.
 		 */

 		/**
 		 * The Table Header View
 		 */
 		?>
 		<script type="text/template" id="tmpl-wc-free-gift-products-table-header">	
 			<thead>
 				<tr>
 					<th><?php esc_html_e( 'Product', 'wc_free_gift_coupons' );?></th>
 					<th><?php esc_html_e( 'Quantity', 'wc_free_gift_coupons' );?></th>
 					<th>&nbsp;</th>
 				</tr>
 			</thead>
 			<tbody></tbody>
 			
 		</script>
 		
 		<?php
 		/**
 		 * The Singular List View
 		 */
 		?>
 		<script type="text/template" id="tmpl-wc-free-gift-product">
 			
 				<td class="product-title">{{{ data.title }}}</td>
 				<td class="product-quantity">
 					<input type="number" name="wc_free_gift_coupons_data[{{{ data.gift_id }}}][quantity]" value="{{{ data.quantity }}}" />
 				</td>
 				<td class="product-remove">
 					<button class="delete-product dashicons-before dashicons-no" href="#" title="<?php esc_attr_e( 'Click to remove', 'wc_free_gift_coupons' );?>"></button>
 				</td>
 		
 		</script>
 		
 		<?php
 	}

 	/**
 	 * Save the new coupon metabox field data
 	 *
 	 * @param integer $post_id
 	 * @param object WC_Coupon $coupon
 	 * @return void
 	 * @since 1.0
 	 */
 	public static function process_shop_coupon_meta( $post_id, $coupon ) {

 		// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
 		if ( isset( $_POST['discount_type'] ) && in_array( $_POST['discount_type'], WC_Free_Gift_Coupons::get_gift_coupon_types(), true ) ) { 

 			// Sanitize gift products.
 			// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
 			$gift_data = isset( $_POST['wc_free_gift_coupons_data'] ) ? self::sanitize_free_gift_meta( $_POST['wc_free_gift_coupons_data'] ) : array();
 		
 			// If discount type is free gift, free gift is important.
 			// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
 			if ( 'free_gift' === $_POST['discount_type'] ) {

 				// Do not allow, a free gift is a must.
 				if ( empty( $gift_data ) ) {
 					$notice = __( 'Please select at least one product to give away with this coupon.', 'wc_free_gift_coupons' );
 					WC_Free_Gift_Coupons_Admin_Notices::add_notice( $notice, 'error', true );
 					return;
 				}

 			}
 			// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
 			$synced_products = isset(  $_POST['_wc_fgc_product_sync_ids'] ) ? array_filter( array_map( 'intval', (array) $_POST['_wc_fgc_product_sync_ids'] ) ) : array();

 			// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
 			$leave_old_synced_products = isset( $_POST['wc_fgc_leave_old_synced_products'] ) ? 'yes' : 'no';

 			if ( 'yes' === $leave_old_synced_products ) {
 				$clear_old_synced_prod = false; 
 			} else {
 				$clear_old_synced_prod = true;
 			}

 			// Add the synced product to list of required products. Stealth way of making sure the sync doesn't malfunction!
 			self::sort_synced_products_for_coupon( $coupon, $synced_products, $clear_old_synced_prod, true );

 			// Sanitize free shipping option.
 			// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
 			$free_gift_shipping = isset( $_POST['wc_free_gift_coupon_free_shipping'] ) ? 'yes' : 'no';

 			// Save.
 			$coupon->update_meta_data( '_wc_free_gift_coupon_data', $gift_data );
 			$coupon->update_meta_data( '_wc_free_gift_coupon_free_shipping', $free_gift_shipping );
 			$coupon->update_meta_data( '_wc_fgc_product_sync_ids', $synced_products );
 			$coupon->update_meta_data( '_wc_fgc_leave_old_synced_products', $leave_old_synced_products );
 			$coupon->save_meta_data();
 		}

 	}

 	/**
 	 * Sorts/Clears old Synced products from Coupon's product id list.
 	 *
 	 * Clears the old synced data is $clear_old_synced_products is true,
 	 * And adds the new set.
 	 *
 	 * @param  WC_Coupon  $coupon The coupon object.
 	 * @param  array      $new_synced_products New synced product to be added to product_ids list.
 	 * @param  bool       $clear_old_synced_products Removes old synced products if true, default is true.
 	 * @param  bool       $save If true, runs the save method, default is false. 
 	 * @return array The flushed array of product_ids
 	 */
 	public static function sort_synced_products_for_coupon( $coupon, $new_synced_products, $clear_old_synced_products = true, $save = false ) {
 		// First get list of products already added, if any.
 		self::$coupon_product_ids = $coupon->get_product_ids();

 		// Get old synced product data.
 		$old_synced_products = $coupon->get_meta( '_wc_fgc_product_sync_ids' );

 		// Should we clear old data? if no, let's save stress.
 		if ( true === $clear_old_synced_products ) {
 			// Check if old synced products are in product ids data.
 			foreach ( $old_synced_products as $old_data ) {
 				if ( in_array( $old_data, self::$coupon_product_ids, true ) ) {
 					// Remove old synced products from product_ids, incase there's a change.
 					unset( self::$coupon_product_ids[ array_search( $old_data, self::$coupon_product_ids, true ) ] );
 				}
 			}
 				
 		} else {
 			// Show notice only when new synced product is different from old.
 			if ( $old_synced_products !== $new_synced_products ) {
 				// Show notice
 				$notice = __( 'The previously synced product is still in your required product list.', 'wc_free_gift_coupons' );
 				WC_Free_Gift_Coupons_Admin_Notices::add_notice(
 					$notice,
 					array(
 						'type'          => 'info',
 						'dismiss_class' => 'yes',
 					),
 					true
 				);
 			}
 		}

 		// Set new, and no need to check for duplicates, WC does that by default :).
 		$merged = array_merge( self::$coupon_product_ids, $new_synced_products );
 		$coupon->set_product_ids( $merged );
 		//exit;
 		if ( true === $save ) {
 			$coupon->save();
 		}
 		return $coupon->get_product_ids();
 	}

 	/**
 	 * Sanitize separately so we can re-use this method for compatibility reasons.
 	 *
 	 * @param array $wc_free_gift_coupons_data - The posted data.
 	 * @return array
 	 * @since 2.1.0
 	 */
 	public static function sanitize_free_gift_meta( $wc_free_gift_coupons_data ) {

 		$gift_data = array();

 		if ( is_array( $wc_free_gift_coupons_data ) ) {

 			foreach ( $wc_free_gift_coupons_data as $gift_id => $data ) {

 				$gift_id = intval( $gift_id );

 				$_product = wc_get_product( $gift_id );
 				
 				if ( $_product ) {
 					$gift_data[$gift_id] = 
 						array( 
 							'product_id' => $_product->get_parent_id() > 0 ? $_product->get_parent_id() : $gift_id,
 							'variation_id' => $_product->get_parent_id() > 0 ? $gift_id : 0,
 							'quantity' => isset( $data['quantity'] ) ? intval( $data['quantity'] ) : 1
 						);
 				}
 			}
 		}

 		return $gift_data;
 	}

 	/**
 	 * Show row meta on the plugin screen.
 	 *
 	 * @param	mixed  $links
 	 * @param	mixed  $file
 	 * @return	array
 	 */
 	public static function plugin_row_meta( $links, $file ) {

 		if ( $file === WC_FGC_PLUGIN_NAME ) {
 			$row_meta = array(
 				'docs'    => '<a target="_blank" href="https://docs.woocommerce.com/document/free-gift-coupons/">' . __( 'Documentation', 'wc_free_gift_coupons' ) . '</a>',
 				'support' => '<a target="_blank" href="' . esc_url( 'https://woocommerce.com/my-account/marketplace-ticket-form/' ) . '">' . __( 'Support', 'wc_free_gift_coupons' ) . '</a>',
 			);

 			return array_merge( $links, $row_meta );
 		}

 		return $links;
 	}

 } // End class.

 WC_Free_Gift_Coupons_Admin::init();
diff --git a/free-gift-coupons-meta-box.js b/free-gift-coupons-meta-box.js
 /* global woocommerce_free_gift_coupon_meta_i18n */

 /**
 * Script for handling the coupon metabox UI.
 * 
 * @type {Object} JavaScript namespace for our application.
 */
 var WC_Free_Gift_Coupons = {};

 (function($, WC_Free_Gift_Coupons) {

 	// Model.
 	WC_Free_Gift_Coupons.Product = Backbone.Model.extend({
 		defaults: {
 			"quantity": 1,
 			"title": "",
 			"product_id" : "",
 			"variation_id" : "",
 			"gift_id" : ""
 		},

 		initialize: function() {
 			if ( ! this.get( "gift_id" ).length ) {
 				this.set( "gift_id", this.get( "variation_id" ) > 0 ? this.get( "variation_id" ) : this.get( "product_id" ) );
 			}
 		},
 	});

 	// Collection.
 	WC_Free_Gift_Coupons.ProductsCollection = Backbone.Collection.extend({
 		model: WC_Free_Gift_Coupons.Product,
 		el: "#wc-free-gift-container"
 	});

 	// Singular Row View.
 	WC_Free_Gift_Coupons.productView = Backbone.View.extend({

 		model: WC_Free_Gift_Coupons.Product,
 		tagName: 'tr',

 		events: {
 			'click .delete-product': 'removeProduct',
 			'change .product-quantity :input': 'setQuantity'
 		},

 		// Get the template from the DOM.
 		template: wp.template("wc-free-gift-product"),

 		// Render the single model.
 		render: function() {
 			this.$el.html(this.template(this.model.toJSON()));
 			return this;
 		},

 		// Reorder after sort.
 		reorder: function(event, index) {
 			this.$el.trigger('update-sort', [this.model, index]);
 		},

 		// Remove/destroy a model.
 		removeProduct: function(e) { 
 			e.preventDefault();
 			this.model.destroy();
 			WC_Free_Gift_Coupons.productList.render(); // Manually calling instead of listening since listening interferes with sorting.

 			// Disable button or not.
 			WC_Free_Gift_Coupons.toggleButtonActivity();
 		},

 		// Persist the quantity in the model.
 		setQuantity: function(e) {
 			value = this.$el.find('.product-quantity :input').val();
 			this.model.set('quantity', value);
 		}

 	});

 	// List View.
 	WC_Free_Gift_Coupons.productListTable = Backbone.View.extend({

 		el: "#wc-free-gift-table",
 		template: wp.template( 'wc-free-gift-products-table-header'),

 		addSingle: function(model) {
 			var view = new WC_Free_Gift_Coupons.productView({
 				model: model
 			});
 			this.$el.find('tbody').prepend(view.render().el);
 		},

 		// Callback for SelectWoo section.
 		addProduct: function( event, attributes) {
 			Product = new WC_Free_Gift_Coupons.Product(attributes);
 			this.collection.add(Product, {at: 0} );
 			this.render();
 		},

 		events: {
 			'click .delete-product': 'removeProduct',
 			'addFreeGiftProduct': 'addProduct',
 		},
 	 
 		render: function() {

 			this.$el.children().remove();

 			if ( this.collection.length ) {

 				this.$el.html(this.template());
 			
 				this.collection.each( function(data) {
 					this.$el.find('tbody').append(new WC_Free_Gift_Coupons.productView({model : data}).render().el);
 				}, this);

 			}
 	 
 			return this;
 		}

 	});

 	// Init.
 	WC_Free_Gift_Coupons.initApplication = function() {

 		// Create Collection From Existing Meta.
 		WC_Free_Gift_Coupons.productCollection = new WC_Free_Gift_Coupons.ProductsCollection(woocommerce_free_gift_coupon_meta_i18n.free_gifts);

 		// Create the List View.
 		WC_Free_Gift_Coupons.productList = new WC_Free_Gift_Coupons.productListTable({
 			collection: WC_Free_Gift_Coupons.productCollection
 		});

 		// Render the List View.
 		WC_Free_Gift_Coupons.productList.render();

 	};

 	/**
 	 * Toggle Publish Button enable/disable.
 	 * 
 	 * It also checks if free gift products have been added.
 	 */
 	WC_Free_Gift_Coupons.toggleButtonActivity = function() {
 		let $ = jQuery;
 		let freeGiftsQty = $( '#wc-free-gift-table' ).find( 'tr' ).length;

 		// Has any product been added?
 		 if ( 'free_gift' === $( 'select#discount_type' ).val() && freeGiftsQty == 0 ) {
 			$( '#publish' ).attr( 'disabled', 'true' );
 		}
 		else {
 			$( '#publish' ).removeAttr( 'disabled' );	
 		}
 	};

 	/*-----------------------------------------------------------------------------------*/
 	/* Execute the above methods in the WC_Free_Gift_Coupons object.
 	/*-----------------------------------------------------------------------------------*/

 	jQuery(document).ready(function($) {

 		WC_Free_Gift_Coupons.initApplication();


 		$( '#wc-free-gift-table' ).sortable({
 			items: "tbody > tr",
 			handle: ".product-title",
 			axis: "y",
 			opacity: 0.5,
 			grid: [20, 10],
 			tolerance: "pointer"
 		});

 		$( document.body ).trigger( 'wc-enhanced-select-init' );

 		if ( $( '#free_gift_ids' ).hasClass( 'select2-hidden-accessible' ) ) {

 			$( '#free_gift_ids' ).on( 'select2:select', function ( e ) { 
 				var data = e.params.data;
 				
 				if ( data.id.length ) {

 					var new_gift = {
 						gift_id: data.id,
 						title: data.text
 					}

 					$( '#wc-free-gift-table' ).trigger( 'addFreeGiftProduct', new_gift );

 					// Keep values out of enhanced select container.
 					$( this ).val([]).change();

 					$('#wc-free-gift-table').sortable('refresh');

 					// Enable Publish Button.
 					WC_Free_Gift_Coupons.toggleButtonActivity();

 				}
 			});
 		}
 	
 		// Toggle coupon type options.
 		$( 'select#discount_type' ).change(function(){

 			// Get value.
 			var select_val = $(this).val();

 			$toggle_fields = $( '.coupon_amount_field' );

 			coupon_types = jQuery.parseJSON( woocommerce_free_gift_coupon_meta_i18n.coupon_types );

 			// Check if coupon type is in supported type list.
 			if ( $.inArray( select_val, coupon_types ) !== -1 ) {
 				$( '.show_if_free_gift' ).show();

 				// Only hide the price field for Free Gift type
 				if ( 'free_gift' == select_val ) {
 					$toggle_fields.hide();
 				} else {
 					$toggle_fields.show();
 				}

 				// Enable/Disable Publish Button.
 				WC_Free_Gift_Coupons.toggleButtonActivity();

 			} else {
 				$( '.show_if_free_gift' ).hide();
 				$toggle_fields.show();
 			}

 		}).change();
 	});

 })(jQuery, WC_Free_Gift_Coupons);
diff --git a/name-your-price.js b/name-your-price.js
 jQuery( document ).ready( function($) {

 	/**
 	 * woocommerce_nyp_update function
 	 * Wraps all important nyp callbacks for plugins that maybe don't have elements available on load
 	 * ie: quickview, bundles, etc
 	 */
 	$.fn.woocommerce_nyp_update = function() {

 		/**
 		 * Name Your Price Handler for individual items
 		 */
 		$( this ).on( 'woocommerce-nyp-update', function() {

 			// Some important objects.
 			var $cart 			= $( this );
 			var $nyp 			= $cart.find( '.nyp' );
 			var $nyp_input 		= $cart.find( '.nyp-input' );
 			var $submit 		= $cart.find( ':submit' );
 			var $ajax_cart_button 	= $cart.find( '.ajax_add_to_cart' );

 			// Add a div to hold the error message.
 			var $error = $cart.find( '.woocommerce-nyp-message' );

 			if ( ! $error.length ){
 				$('<div class="woocommerce-nyp-message woocommerce-error"></div>').hide().prependTo($nyp);
 			}

 			// Clear errors.
 			$nyp.removeClass( 'nyp-error' );

 			// Skip validation for optional products, ex: grouped/bundled.
 			if( $nyp.data( 'optional' ) === 'yes' && $nyp.data( 'optional_status' ) === false ) {
 				$error.empty().slideUp();
 				return;
 			}

 			// The default error message.
 			var error_message = $nyp.data( 'hide-minimum' ) ? $nyp.data( 'hide-minimum-error' ) : $nyp.data( 'minimum-error' );
 			var error_tag = "%%MINIMUM%%";
 			var error = false;
 			var error_price = ''; // This will hold the formatted price for the error message.

 			// The current price.
 			var form_price 	= $nyp_input.val();
 			// Convert price to default decimal setting for calculations.
 			var form_price_num 	= woocommerce_nyp_unformat_price( form_price );

 			var min_price 			= parseFloat( $nyp.data( 'min-price' ) );
 			var max_price 			= parseFloat( $nyp.data( 'max-price' ) );
 			var annual_minimum	= parseFloat( $nyp.data( 'annual-minimum' ) );

 			// Get variable billing period data.
 			var $nyp_period		= $cart.find( '.nyp-period' );
 			var form_period		= $nyp_period.val();

 			// If has variable billing period AND a minimum then we need to annulalize min price for comparison.
 			if ( annual_minimum > 0 ){

 				// Calculate the price over the course of a year for comparison.
 				form_annulualized_price = form_price_num * woocommerce_nyp_params.annual_price_factors[form_period];

 				// If the calculated annual price is less than the annual minimum.
 				if( form_annulualized_price < annual_minimum ){

 					error = annual_minimum / woocommerce_nyp_params.annual_price_factors[form_period];

 					// In the case of variable period we need to adjust the error message a bit.
 					error_price = woocommerce_nyp_format_price( error, woocommerce_nyp_params.currency_format_symbol, true ) + ' / ' + $nyp_period.find('option[value="' + form_period + '"]').text();

 				}

 			// Otherwise a regular product or subscription with non-variable periods, compare price directly.
 			} else if ( form_price_num < min_price ) {
 				error = min_price;
 				error_price = woocommerce_nyp_format_price( min_price, woocommerce_nyp_params.currency_format_symbol, true );

 			// Check maximum price.
 			} else if ( form_price_num > max_price ) {
 				error = max_price;
 				error_message = $nyp.data( 'maximum-error' );
 				error_tag = "%%MAXIMUM%%";
 				error_price = woocommerce_nyp_format_price( max_price, woocommerce_nyp_params.currency_format_symbol, true );
 			}

 			// Maybe auto-format the input.
 			if( $.trim( form_price ) != '' ){
 				$nyp_input.val( woocommerce_nyp_format_price( form_price_num ) );
 			}

 			// Always add the price to the button as data for AJAX add to cart.
 			$submit.data( $nyp_input.attr( 'name' ), woocommerce_nyp_format_price( form_price_num ) );

 			// For grouped products and product bundles, make sure to show error message that has quantity.
 			$nyp_closest_form = $nyp.closest( 'form' );
 			if( $nyp_closest_form.hasClass( 'grouped_form' ) || $nyp_closest_form.hasClass( 'bundle_form' ) ){
 				// Also change the btn value, its different for grouped products.
 				$submit = $nyp_closest_form.find( ':submit' );
 			}

 			// If we've set an error, show message and prevent submit.
 			if ( error ){

 				// Disable submit.
 				$nyp.addClass( 'nyp-error' );

 				// Disable core AJAX support.
 				if( $ajax_cart_button.length ) {
 					$ajax_cart_button.removeAttr( 'data-product_id' );
 				}

 				// Show error, but not on page load.
 				if( $nyp.data( 'initialized' ) === 1 ) {
 					error_message = error_message.replace( error_tag, error_price );

 					$error.html( error_message ).slideDown( function() {
 					    $nyp_input.focus();
 					});

 					// Add disabled btn class.
 					$submit.addClass( 'nyp-disabled' );

 				}

 			// Otherwise allow submit and update.
 			} else {

 				// Remove error.
 				$error.slideUp();

 				// Remove disabled btn class.
 				$submit.removeClass( 'nyp-disabled' );

 				// Restore core AJAX support.
 				if( $ajax_cart_button.length ) {
 					$ajax_cart_button.attr( 'data-product_id', $nyp.data( 'product_id' ) );
 				}

 				// Product add ons compatibility.
 				$(this).find( '#product-addons-total' ).data( 'price', form_price_num );
 				$cart.trigger( 'woocommerce-product-addons-update' );

 				// Bundles compatibility.
 				$nyp.data( 'price', form_price_num );
 				$cart.trigger( 'woocommerce-nyp-updated-item' );
 				$( 'body' ).trigger( 'woocommerce-nyp-updated' );

 			}

 			// For NYP Products in OPC Template.
 			
 			// If opc is currently around, and nyp is also found.
 			if( $nyp.closest( '.wcopc' ).length > 0  ){

 				if( error && resetQty === true ){
 					// Reset quantity value of current NYP element.
 					$cart.find( '.quantity .qty' ).val(0);

 					// Set value to true.
 					nypAllowTrigger = true;

 					// Reset back
 					resetQty = false;
 				}

 			}

 			// Set to initialized.
 			$nyp.data( 'initialized', 1 );

 		} ); // End woocommerce-nyp-update handler.

 		// NYP update on change to any nyp input.
 		$( this ).on( 'change', '.nyp-input, .nyp-period', function() { 
 			var $cart = $(this).closest( '.cart, .nyp-product' );
 			$cart.trigger( 'woocommerce-nyp-update' );
 		} );

 		// Trigger right away.
 		$( this ).find( '.nyp-input' ).trigger( 'change' );

 		/**
 		 * Handle NYP Variations
 		 */

 		if ( $( this ).hasClass( 'variations_form' ) ) {

 			// Some important objects.
 			var $variation_form 	= $(this);
 			var $add_to_cart 		= $(this).find( 'button.single_add_to_cart_button' );
 			var $nyp 				= $(this).find( '.nyp' );
 			var $nyp_input 			= $nyp.find( '.nyp-input' );
 			var $minimum 			= $nyp.find( '.minimum-price' );
 			var $subscription_terms = $nyp.find( '.subscription-details' );
 			var $error      = $variation_form.find( '.woocommerce-nyp-message' );

 			// The add to cart text.
 			var default_add_to_cart_text 	= $add_to_cart.html();

 			// Hide the nyp form by default.
 			$nyp.hide();
 			$minimum.hide();

 			// Listeners

 			// When variation is found, decide if it is NYP or not.
 			$variation_form

 			.on( 'found_variation', function( event, variation ) {

 				// Hide any existing error message.
 				$error.slideUp();

 				// If NYP show the price input and tweak the data attributes.
 				if ( typeof variation.is_nyp != undefined && variation.is_nyp == true ) {

 					// Switch add to cart button text if variation is NYP.
 					$add_to_cart.html( variation.add_to_cart_text );

 					// Get the prices out of data attributes.
 					var display_price = typeof variation.display_price != 'undefined' ? variation.display_price : '';
 					var minimum_price = typeof variation.minimum_price != 'undefined' ? variation.minimum_price : '';
 					var maximum_price = typeof variation.maximum_price != 'undefined' ? variation.maximum_price : '';

 					// Maybe auto-format the input.
 					if( $.trim( display_price ) != '' ){
 						$nyp_input.val( woocommerce_nyp_format_price( display_price ) );
 					} else {
 						$nyp_input.val( '' );
 					}

 					// Maybe show subscription terms.
 					if( $subscription_terms.length && variation.subscription_terms ){
 						$subscription_terms.html( variation.subscription_terms );
 					}

 					// Maybe show minimum price html.
 					if( variation.minimum_price_html ){
 						$minimum.html( variation.minimum_price_html ).show();
 					} else {
 						$minimum.hide();
 					}

 					// Set the NYP data attributes for JS validation on submit.
 					$nyp.data( 'min-price', minimum_price ).slideDown();
 					$nyp.data( 'max-price', maximum_price );

 					// Toggle minimum error message between explicit and obscure.
 					$nyp.data( 'hide-minimum', variation.hide_minimum );

 					// Product add ons compatibility.
 					var form_price_num 	= woocommerce_nyp_unformat_price( $nyp_input.val() );
 					$(this).find( '#product-addons-total' ).data( 'price', form_price_num );
 					$(this).trigger( 'woocommerce-product-addons-update' );

 				// If not NYP, hide the price input.
 				} else {

 					// Use default add to cart button text if variation is not NYP.
 					$add_to_cart.html( default_add_to_cart_text );

 					// Hide.
 					$nyp.slideUp();

 				}

 			} )

 			// Hide the price input when reset is clicked.
 			.on( 'reset_image', function( event ) {

 				$add_to_cart.html( default_add_to_cart_text );
 				$nyp.slideUp();
 				$error.hide();

 			} )

 			// Hide the price input when reset is clicked.
 			.on( 'click', '.reset_variations', function( event ) {

 				$add_to_cart.html( default_add_to_cart_text );
 				$nyp.slideUp();
 				$error.hide();

 			} );

 			// Need to re-trigger some things on load since Woo unbinds the found_variation event.
 			$( this ).find( '.variations select, .variations input[type=radio]' ).trigger( 'change' );

 		}


 	} // End fn.woocommerce_nyp_update().

 	/**
 	 * Run when Quick view item is launched.
 	 */
 	$( 'body' ).on( 'quick-view-displayed', function() {
 		$( 'body' ).find( '.cart:not(.cart_group)' ).each( function() {
 			$( this ).woocommerce_nyp_update();
 		} );
 	} );

 	/**
 	 * Run when a Composite component is re-loaded.
 	 */
 	$( 'body .component' ).on( 'wc-composite-component-loaded', function() {
 		$( this ).find( '.cart:not(.cart_group)' ).each( function() {
 			$( this ).woocommerce_nyp_update();
 		} );
 	} );

 	/**
 	 * Run on load.
 	 */
 	$( 'body' ).find( '.cart:not(.cart_group, .grouped_form)' ).each( function() {
 		$( this ).woocommerce_nyp_update();
 	} );

 	/**
 	 * Run on load for grouped products.
 	 */
 	$( 'body .grouped_form' ).find( '.nyp-product' ).each( function() {
 		$( this ).woocommerce_nyp_update();
 	} );

 	/**
 	 * Compatibility with optional grouped products.
 	 */
 	$( 'body .grouped_form .qty' ).on( 'change', function() {

 		var $nyp = $(this).closest( 'tr' ).find( '.nyp' );

 		if( $nyp.length ) {
 			if( $(this).val() > 0 ) {
 				$nyp.data( 'optional_status', true );
 			} else {
 				$nyp.data( 'optional_status', false );
 			}
 		}

 	} ).change();


 	/**
 	 * Beginning of OPC compatibilty.
 	 * If opc is currently around, and nyp is also found, to preserve resource :)
 	 */
 	if( $( 'body .wcopc' ).length > 0 && $( 'body .wcopc .nyp' ).length > 0 ){
 		/**
 		 * Variables to be used within this scope
 		 */
 		// Store the destroyed bind here, access anywhere
 		var bindStorer = null;

 		// Determines if we are to reset qty value in 'woocommerce-nyp-update' function.
 		var resetQty = false;

 		/**
 		  * Should we allow .trigger( 'woocommerce-nyp-update' ); in event opc_validate_add_remove_product
 		  * This is useful when the 2 events "input and change" are running, and along the line, qty is already set to 0
 		  * before the second event runs, cause if qty is already zero before second event runs, opc will go allowed to validate.
 		  */
 		var nypAllowTrigger = false;

 		/**
 	 	* Validate One Page Checkout ajax add to cart.
 	 	*/
 		$( 'body' ).on( 'opc_validate_add_remove_product', function( e, $triggeredBy ) {
 			var valid = true;
 			var $cart = $triggeredBy.closest( '.cart' );
 			var $nyp  = $cart.find( '.nyp' );
 			var $qty  = $cart.find( '.quantity .qty' );	
 			
 			if( $qty.val() > 0 || nypAllowTrigger === true ) {
 				$cart.trigger( 'woocommerce-nyp-update' );		
 				if( $nyp.hasClass( 'nyp-error' ) ) {
 					valid = false; 
 				}
 			}
 			return valid;
 		});

 		/**
 		 * PreBind Function
 		 *
 		 * Helps to trigger an event before its ancestors :)
 		 * This helps to make our validation trigger before that of opc
 		 * helps to solve the issue of not having to add a snippet to the one-page-checkout.js file ;)
 		 * @reference https://stackoverflow.com/a/10413124/5510038
 		 */
 		$.fn.preBind = function( type, data, fn ) {
    		this.each( function(){
        		var $this = $( this );

        		// Add nyp namespace to our event for easy recognition.
        		$this.bind( type + '.nyp', data, fn );

 				var currentBindings = $this.data( 'events' )[type];

 				if ( $.isArray( currentBindings ) ){
        		    currentBindings.unshift( currentBindings.pop() );
    	    	}
    		});
    		return this;
 		};


 		/**
 		 * Extract Handler Function
 		 *
 		 * Helps to remove the callback function attached to the element event
 		 * @return Array
 		 */
 		$.fn.nypExtractEventBinding = function( type, data, fn ) {
 			var newBindings = {};
 			var i = 0;
 			this.each( function(){
        		var $this = $( this );
        		
        		// If a bind element is to be destroyed
        		if ( undefined !== data && data.bindDestroy === true ){
 					// Delete only from element without event namespace nyp
        			$this.data( 'events' )[type].forEach( function( item, index, object ){
        		
        				if( item.namespace !== "nyp" ){
        					// store and remove from element.
        					newBindings[i] = item;
        					object.splice( index, 1 );
        		    	}
        			});
        		}
        		++i;
        	});
    		return newBindings;
 		};

 		/**
 		 * Run by our own ocp quantity input to change default behaviour of the opc version
 		 * @param e - event
 		 * @param that - this object
 		 */
 		var wcNypOpcValidate = function( e, that ) {
 			var $input = $( that );

 			// Get the element opc uses to trigger validation
 			var $opcSelector = $( '#opc-product-selection input[type="number"][data-add_to_cart]' );
 			var nypOpcValidTrigger = $( 'body' ).triggerHandler( 'opc_validate_add_remove_product', [ $input ] );
 			
 			// Set nyp Allowed trigger to false now.
 			nypAllowTrigger = false;

 			if( nypOpcValidTrigger === false ) {
 				// Destroy bind.
 				// You can get the function handler of an event and store. :)
 				// Storing the event function on opc js file.
 				var storeBindChange = $input.nypExtractEventBinding( 'change', { "bindDestroy": true } );
 				var storeBindInput = $input.nypExtractEventBinding( 'input', { "bindDestroy": true } );
 				
 				// Store anyone of the above only when there's a value.
 				bindStorer = ( JSON.stringify(storeBindInput) !== "{}" ? storeBindInput : bindStorer );
 				
 				// Allow quantity reset.
 				resetQty = true;
 				
 				// Prevent opc trigger when running first time.
 				e.stopImmediatePropagation();
 			}
 			else{
 				// On and re-add the handler to retrigger for next time. :)
 				if(bindStorer != null){
 					// Disable qauntity reset.
 					resetQty = false;

 					// Turn back on.
 					$opcSelector.on( 'input change', bindStorer[0]['handler'] );
 				}

 			}
 		};

 		/**
 		 * Compatibility with Validation One Page Checkout ajax add to cart.
 		 * Get the selector that opc uses to trigger on change,input and prebind our function to run before it
 		 * I guess you can call this technique being the flash :)
 		 */
 		 var $wcNypOpcSelector = $( '#opc-product-selection input[type="number"][data-add_to_cart]' );
 	 	
 	 	 // Prebind for change.
 		 $wcNypOpcSelector.preBind( 'change', function( e ){
 		 	wcNypOpcValidate( e, this );
 		 });
 		 // Prebind for input.
 		 $wcNypOpcSelector.preBind( 'input', function( e ){
 			wcNypOpcValidate( e, this );
 		});
 	}
 	// End of OPC Compatibility.

 	/**
 	 * Validate on submit.
 	 */
 	$( document.body ).on( 'click', '.single_add_to_cart_button', function(e) {
 		var valid = true;
 		$( '.nyp' ).each( function() {
 			$( this ).woocommerce_nyp_update();
 			if( $( this ).hasClass( 'nyp-error' ) ) {
 				valid = false;
 			}
 		});

 		if( ! valid ) {
 			e.preventDefault();
 		}

 	});

 	/**
 	 * Helper functions
 	 */
 	// Format the price with accounting.js.
 	function woocommerce_nyp_format_price( price, currency_symbol, format ){

 		if ( typeof currency_symbol === 'undefined' ) {
 			currency_symbol = '';
 		}

 		if ( typeof format === 'undefined' ) {
 			format = false;
 		}

 		var currency_format = format ? woocommerce_nyp_params.currency_format : '%v';

 		return accounting.formatMoney( price, {
 				symbol : currency_symbol,
 				decimal : woocommerce_nyp_params.currency_format_decimal_sep,
 				thousand: woocommerce_nyp_params.currency_format_thousand_sep,
 				precision : woocommerce_nyp_params.currency_format_num_decimals,
 				format: currency_format
 		}).trim();

 	}

 	// Get absolute value of price and turn price into float decimal.
 	function woocommerce_nyp_unformat_price( price ){
 		return Math.abs( parseFloat( accounting.unformat( price, woocommerce_nyp_params.currency_format_decimal_sep ) ) );
 	}

 } );
	<?php
	if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
	}

	if ( class_exists( 'WC_Free_Gift_Coupons_Admin' ) ) {
	WC_Free_Gift_Coupons_Admin::init(); // Run if class exists.
	}

	/**
	* Main Admin Class
	*
	* @class WC_Free_Gift_Coupons_Admin
	* @version 2.0.0
	*/
	class WC_Free_Gift_Coupons_Admin {

	/**
	* The plugin version
	*
	* @var string
	*/
	public static $version = '2.5.2';

	/**
	* Coupon Product ids list
	*
	* @var array
	* @since 3.0.0
	*/
	protected static $coupon_product_ids = array();

	/**
	* Initialize
	*
	* @return WC_Free_Gift_Coupons_Admin
	* @since 1.0
	*/
	public static function init() {

	// Admin scripts.
	add_action( 'admin_enqueue_scripts', array( __CLASS__, 'admin_scripts' ) );

	// Add and save coupon meta.
	add_action( 'woocommerce_coupon_options', array( __CLASS__, 'coupon_options' ), 10, 2 );
	add_action( 'woocommerce_coupon_options_save', array( __CLASS__, 'process_shop_coupon_meta' ), 20, 2 );

	// Show row meta on the plugin screen.
	add_filter( 'plugin_row_meta', array( __CLASS__, 'plugin_row_meta' ), 10, 2 );

	}

	/**
	* Load admin script
	*
	* @return void
	* @since 1.0
	*/
	public static function admin_scripts() {

	// Coupon styles.
	wp_register_style( 'woocommerce_free_gift_coupon_meta', plugins_url( '../assets/css/free-gift-coupons-meta-box.css' , __DIR__ ), array(), WC_Free_Gift_Coupons::$version );

	// Coupon script.
	$suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';
	wp_register_script( 'woocommerce_free_gift_coupon_meta', plugins_url( '../assets/js/free-gift-coupons-meta-box' . $suffix . '.js' , __DIR__ ), array( 'jquery', 'backbone', 'underscore', 'wp-util', 'jquery-ui-sortable', 'wc-enhanced-select' ), WC_Free_Gift_Coupons::$version, true );

	}

	/**
	* Load admin script
	*
	* @param int $coupon_id
	* @return void
	* @since 1.0
	*/
	public static function load_scripts( $coupon_id = '' ) {

	// Coupon styles.
	wp_enqueue_style( 'woocommerce_free_gift_coupon_meta' );

	// Coupon script.
	wp_enqueue_script( 'woocommerce_free_gift_coupon_meta' );

	$translation_array = array(
	'coupon_types' => wp_json_encode( WC_Free_Gift_Coupons::get_gift_coupon_types() ),
	'free_gifts' => array_values( WC_Free_Gift_Coupons::get_gift_data( intval( $coupon_id ) ) )
	);

	wp_localize_script( 'woocommerce_free_gift_coupon_meta', 'woocommerce_free_gift_coupon_meta_i18n', $translation_array );

	// Backbone template.
	add_action( 'admin_print_footer_scripts', array( __CLASS__, 'print_templates' ) );

	}

	/**
	* Output the new Coupon metabox fields
	*
	* @return HTML
	* @since 1.0
	*/
	public static function coupon_options( $coupon_id, $coupon ) {
	self::load_scripts( $coupon_id );
	?>

	<p class="form-field show_if_free_gift">

	<label for="free_gift_ids"><?php esc_html_e( 'Free Gifts', 'wc_free_gift_coupons' ) ?></label>

	<span class="description"><?php esc_html_e( 'These are the products you are giving away with this coupon. They will automatically be added to the cart.', 'wc_free_gift_coupons' ); ?></span>

	</p>

	<p class="form-field show_if_free_gift">

	<span class="add_prompt dashicons-before dashicons-plus"></span>

	<select id="free_gift_ids" style="width:90%;" class="wc-product-search" name="free_gift_ids" multiple="multiple" data-sortable="sortable" data-placeholder="<?php esc_attr_e( 'Search for a product…', 'wc_free_gift_coupons' ); ?>" data-action="woocommerce_json_search_products_and_variations">
	<option></option>
	</select>

	</p>

	<div id="wc-free-gift-container" class="show_if_free_gift">
	<table id="wc-free-gift-table"></table>
	<noscript><?php esc_html_e( 'Javascript is required for product selection to work.', 'wc_free_gift_coupons' );?></noscript>
	</div>

	<!-- Sync Quantities -->
	<p class="form-field show_if_free_gift">

	<label for="_wc_fgc_product_sync_ids"><?php esc_html_e( 'Sync Quantities', 'wc_free_gift_coupons' ) ?></label>

	<span class="description"><?php esc_html_e( 'Sync the gift products\' quantities to the qauntity of a product in the cart.', 'wc_free_gift_coupons' ); ?></span>

	</p>

	<p class="form-field show_if_free_gift">

	<span class="add_prompt dashicons-before dashicons-plus"></span>

	<select id="_wc_fgc_product_sync_ids" style="width:80%;" class="wc-product-search" name="_wc_fgc_product_sync_ids" data-sortable="sortable" data-allow-clear="tru" data-placeholder="<?php esc_attr_e( 'Search for a product…', 'wc_free_gift_coupons' ); ?>" data-action="woocommerce_json_search_products_and_variations">
	<option></option>
	<?php
	$product_ids = $coupon->get_meta( '_wc_fgc_product_sync_ids', true, 'edit' );

	foreach ( $product_ids as $row => $product_id ) {
	$product = wc_get_product( $product_id );
	if ( is_object( $product ) ) {
	echo '<option value="' . esc_attr( $product_id ) . '"' . selected( true, true, false ) . '>' . htmlspecialchars( wp_kses_post( $product->get_formatted_name() ) ) . '</option>';
	}
	}
	?>
	</select>
	<?php
	echo wc_help_tip(
	__( 'This adds the Synced Product to the required Product List, if it is not already added.', 'wc_free_gift_coupons' )
	);
	?>
	</p>

	<?php
	woocommerce_wp_checkbox( array(
	'id' => 'wc_fgc_leave_old_synced_products',
	'value' => $coupon->get_meta( '_wc_fgc_leave_old_synced_products', true, 'edit' ),
	'label' => __( 'Leave synced products in required product list.', 'wc_free_gift_coupons' ),
	'description' => __( 'Check this box if you want to keep the previous synced product in the required product list.', 'wc_free_gift_coupons' ),
	'wrapper_class' => 'show_if_free_gift'
	) );

	// Free shipping for free gift.
	if ( function_exists( 'wc_shipping_enabled' ) && wc_shipping_enabled() ) {
	woocommerce_wp_checkbox( array(
	'id' => 'wc_free_gift_coupon_free_shipping',
	'value' => $coupon->get_meta( '_wc_free_gift_coupon_free_shipping', true, 'edit' ),
	'label' => __( 'Free shipping for gift(s)', 'wc_free_gift_coupons' ),
	'description' => __( 'Check this box if the free gift(s) should not incur a shipping cost. A free shipping method must be enabled.', 'wc_free_gift_coupons' ),
	'wrapper_class' => 'show_if_free_gift'
	) );
	}

	}

	/**
	* Prints the templates used in the coupon options metabox
	*
	* @since 2.0.0
	*/
	public static function print_templates() {

	/**
	* Backbone Templates
	* This file contains all of the HTML used in our application
	*
	* Each template is wrapped in a script block ( note the type is set to "text/html" ) and given an ID prefixed with
	* 'tmpl'. The wp.template method retrieves the contents of the script block and converts these blocks into compiled
	* templates to be used and reused in your application.
	*/

	/**
	* The Table Header View
	*/
	?>
	<script type="text/template" id="tmpl-wc-free-gift-products-table-header">
	<thead>
	<tr>
	<th><?php esc_html_e( 'Product', 'wc_free_gift_coupons' );?></th>
	<th><?php esc_html_e( 'Quantity', 'wc_free_gift_coupons' );?></th>
	<th> </th>
	</tr>
	</thead>
	<tbody></tbody>

	</script>

	<?php
	/**
	* The Singular List View
	*/
	?>
	<script type="text/template" id="tmpl-wc-free-gift-product">

	<td class="product-title">{{{ data.title }}}</td>
	<td class="product-quantity">
	<input type="number" name="wc_free_gift_coupons_data[{{{ data.gift_id }}}][quantity]" value="{{{ data.quantity }}}" />
	</td>
	<td class="product-remove">
	<button class="delete-product dashicons-before dashicons-no" href="#" title="<?php esc_attr_e( 'Click to remove', 'wc_free_gift_coupons' );?>"></button>
	</td>

	</script>

	<?php
	}

	/**
	* Save the new coupon metabox field data
	*
	* @param integer $post_id
	* @param object WC_Coupon $coupon
	* @return void
	* @since 1.0
	*/
	public static function process_shop_coupon_meta( $post_id, $coupon ) {

	// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
	if ( isset( $_POST['discount_type'] ) && in_array( $_POST['discount_type'], WC_Free_Gift_Coupons::get_gift_coupon_types(), true ) ) {

	// Sanitize gift products.
	// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
	$gift_data = isset( $_POST['wc_free_gift_coupons_data'] ) ? self::sanitize_free_gift_meta( $_POST['wc_free_gift_coupons_data'] ) : array();

	// If discount type is free gift, free gift is important.
	// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
	if ( 'free_gift' === $_POST['discount_type'] ) {

	// Do not allow, a free gift is a must.
	if ( empty( $gift_data ) ) {
	$notice = __( 'Please select at least one product to give away with this coupon.', 'wc_free_gift_coupons' );
	WC_Free_Gift_Coupons_Admin_Notices::add_notice( $notice, 'error', true );
	return;
	}

	}
	// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
	$synced_products = isset( $_POST['_wc_fgc_product_sync_ids'] ) ? array_filter( array_map( 'intval', (array) $_POST['_wc_fgc_product_sync_ids'] ) ) : array();

	// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
	$leave_old_synced_products = isset( $_POST['wc_fgc_leave_old_synced_products'] ) ? 'yes' : 'no';

	if ( 'yes' === $leave_old_synced_products ) {
	$clear_old_synced_prod = false;
	} else {
	$clear_old_synced_prod = true;
	}

	// Add the synced product to list of required products. Stealth way of making sure the sync doesn't malfunction!
	self::sort_synced_products_for_coupon( $coupon, $synced_products, $clear_old_synced_prod, true );

	// Sanitize free shipping option.
	// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce check handled by WooCommerce core.
	$free_gift_shipping = isset( $_POST['wc_free_gift_coupon_free_shipping'] ) ? 'yes' : 'no';

	// Save.
	$coupon->update_meta_data( '_wc_free_gift_coupon_data', $gift_data );
	$coupon->update_meta_data( '_wc_free_gift_coupon_free_shipping', $free_gift_shipping );
	$coupon->update_meta_data( '_wc_fgc_product_sync_ids', $synced_products );
	$coupon->update_meta_data( '_wc_fgc_leave_old_synced_products', $leave_old_synced_products );
	$coupon->save_meta_data();
	}

	}

	/**
	* Sorts/Clears old Synced products from Coupon's product id list.
	*
	* Clears the old synced data is $clear_old_synced_products is true,
	* And adds the new set.
	*
	* @param WC_Coupon $coupon The coupon object.
	* @param array $new_synced_products New synced product to be added to product_ids list.
	* @param bool $clear_old_synced_products Removes old synced products if true, default is true.
	* @param bool $save If true, runs the save method, default is false.
	* @return array The flushed array of product_ids
	*/
	public static function sort_synced_products_for_coupon( $coupon, $new_synced_products, $clear_old_synced_products = true, $save = false ) {
	// First get list of products already added, if any.
	self::$coupon_product_ids = $coupon->get_product_ids();

	// Get old synced product data.
	$old_synced_products = $coupon->get_meta( '_wc_fgc_product_sync_ids' );

	// Should we clear old data? if no, let's save stress.
	if ( true === $clear_old_synced_products ) {
	// Check if old synced products are in product ids data.
	foreach ( $old_synced_products as $old_data ) {
	if ( in_array( $old_data, self::$coupon_product_ids, true ) ) {
	// Remove old synced products from product_ids, incase there's a change.
	unset( self::$coupon_product_ids[ array_search( $old_data, self::$coupon_product_ids, true ) ] );
	}
	}

	} else {
	// Show notice only when new synced product is different from old.
	if ( $old_synced_products !== $new_synced_products ) {
	// Show notice
	$notice = __( 'The previously synced product is still in your required product list.', 'wc_free_gift_coupons' );
	WC_Free_Gift_Coupons_Admin_Notices::add_notice(
	$notice,
	array(
	'type' => 'info',
	'dismiss_class' => 'yes',
	),
	true
	);
	}
	}

	// Set new, and no need to check for duplicates, WC does that by default :).
	$merged = array_merge( self::$coupon_product_ids, $new_synced_products );
	$coupon->set_product_ids( $merged );
	//exit;
	if ( true === $save ) {
	$coupon->save();
	}
	return $coupon->get_product_ids();
	}

	/**
	* Sanitize separately so we can re-use this method for compatibility reasons.
	*
	* @param array $wc_free_gift_coupons_data - The posted data.
	* @return array
	* @since 2.1.0
	*/
	public static function sanitize_free_gift_meta( $wc_free_gift_coupons_data ) {

	$gift_data = array();

	if ( is_array( $wc_free_gift_coupons_data ) ) {

	foreach ( $wc_free_gift_coupons_data as $gift_id => $data ) {

	$gift_id = intval( $gift_id );

	$_product = wc_get_product( $gift_id );

	if ( $_product ) {
	$gift_data[$gift_id] =
	array(
	'product_id' => $_product->get_parent_id() > 0 ? $_product->get_parent_id() : $gift_id,
	'variation_id' => $_product->get_parent_id() > 0 ? $gift_id : 0,
	'quantity' => isset( $data['quantity'] ) ? intval( $data['quantity'] ) : 1
	);
	}
	}
	}

	return $gift_data;
	}

	/**
	* Show row meta on the plugin screen.
	*
	* @param mixed $links
	* @param mixed $file
	* @return array
	*/
	public static function plugin_row_meta( $links, $file ) {

	if ( $file === WC_FGC_PLUGIN_NAME ) {
	$row_meta = array(
	'docs' => '<a target="_blank" href="https://docs.woocommerce.com/document/free-gift-coupons/">' . __( 'Documentation', 'wc_free_gift_coupons' ) . '</a>',
	'support' => '<a target="_blank" href="' . esc_url( 'https://woocommerce.com/my-account/marketplace-ticket-form/' ) . '">' . __( 'Support', 'wc_free_gift_coupons' ) . '</a>',
	);

	return array_merge( $links, $row_meta );
	}

	return $links;
	}

	} // End class.

	WC_Free_Gift_Coupons_Admin::init();
	/* global woocommerce_free_gift_coupon_meta_i18n */

	/**
	* Script for handling the coupon metabox UI.
	*
	* @type {Object} JavaScript namespace for our application.
	*/
	var WC_Free_Gift_Coupons = {};

	(function($, WC_Free_Gift_Coupons) {

	// Model.
	WC_Free_Gift_Coupons.Product = Backbone.Model.extend({
	defaults: {
	"quantity": 1,
	"title": "",
	"product_id" : "",
	"variation_id" : "",
	"gift_id" : ""
	},

	initialize: function() {
	if ( ! this.get( "gift_id" ).length ) {
	this.set( "gift_id", this.get( "variation_id" ) > 0 ? this.get( "variation_id" ) : this.get( "product_id" ) );
	}
	},
	});

	// Collection.
	WC_Free_Gift_Coupons.ProductsCollection = Backbone.Collection.extend({
	model: WC_Free_Gift_Coupons.Product,
	el: "#wc-free-gift-container"
	});

	// Singular Row View.
	WC_Free_Gift_Coupons.productView = Backbone.View.extend({

	model: WC_Free_Gift_Coupons.Product,
	tagName: 'tr',

	events: {
	'click .delete-product': 'removeProduct',
	'change .product-quantity :input': 'setQuantity'
	},

	// Get the template from the DOM.
	template: wp.template("wc-free-gift-product"),

	// Render the single model.
	render: function() {
	this.$el.html(this.template(this.model.toJSON()));
	return this;
	},

	// Reorder after sort.
	reorder: function(event, index) {
	this.$el.trigger('update-sort', [this.model, index]);
	},

	// Remove/destroy a model.
	removeProduct: function(e) {
	e.preventDefault();
	this.model.destroy();
	WC_Free_Gift_Coupons.productList.render(); // Manually calling instead of listening since listening interferes with sorting.

	// Disable button or not.
	WC_Free_Gift_Coupons.toggleButtonActivity();
	},

	// Persist the quantity in the model.
	setQuantity: function(e) {
	value = this.$el.find('.product-quantity :input').val();
	this.model.set('quantity', value);
	}

	});

	// List View.
	WC_Free_Gift_Coupons.productListTable = Backbone.View.extend({

	el: "#wc-free-gift-table",
	template: wp.template( 'wc-free-gift-products-table-header'),

	addSingle: function(model) {
	var view = new WC_Free_Gift_Coupons.productView({
	model: model
	});
	this.$el.find('tbody').prepend(view.render().el);
	},

	// Callback for SelectWoo section.
	addProduct: function( event, attributes) {
	Product = new WC_Free_Gift_Coupons.Product(attributes);
	this.collection.add(Product, {at: 0} );
	this.render();
	},

	events: {
	'click .delete-product': 'removeProduct',
	'addFreeGiftProduct': 'addProduct',
	},

	render: function() {

	this.$el.children().remove();

	if ( this.collection.length ) {

	this.$el.html(this.template());

	this.collection.each( function(data) {
	this.$el.find('tbody').append(new WC_Free_Gift_Coupons.productView({model : data}).render().el);
	}, this);

	}

	return this;
	}

	});

	// Init.
	WC_Free_Gift_Coupons.initApplication = function() {

	// Create Collection From Existing Meta.
	WC_Free_Gift_Coupons.productCollection = new WC_Free_Gift_Coupons.ProductsCollection(woocommerce_free_gift_coupon_meta_i18n.free_gifts);

	// Create the List View.
	WC_Free_Gift_Coupons.productList = new WC_Free_Gift_Coupons.productListTable({
	collection: WC_Free_Gift_Coupons.productCollection
	});

	// Render the List View.
	WC_Free_Gift_Coupons.productList.render();

	};

	/**
	* Toggle Publish Button enable/disable.
	*
	* It also checks if free gift products have been added.
	*/
	WC_Free_Gift_Coupons.toggleButtonActivity = function() {
	let $ = jQuery;
	let freeGiftsQty = $( '#wc-free-gift-table' ).find( 'tr' ).length;

	// Has any product been added?
	if ( 'free_gift' === $( 'select#discount_type' ).val() && freeGiftsQty == 0 ) {
	$( '#publish' ).attr( 'disabled', 'true' );
	}
	else {
	$( '#publish' ).removeAttr( 'disabled' );
	}
	};

	/-----------------------------------------------------------------------------------/
	/* Execute the above methods in the WC_Free_Gift_Coupons object.
	/-----------------------------------------------------------------------------------/

	jQuery(document).ready(function($) {

	WC_Free_Gift_Coupons.initApplication();


	$( '#wc-free-gift-table' ).sortable({
	items: "tbody > tr",
	handle: ".product-title",
	axis: "y",
	opacity: 0.5,
	grid: [20, 10],
	tolerance: "pointer"
	});

	$( document.body ).trigger( 'wc-enhanced-select-init' );

	if ( $( '#free_gift_ids' ).hasClass( 'select2-hidden-accessible' ) ) {

	$( '#free_gift_ids' ).on( 'select2:select', function ( e ) {
	var data = e.params.data;

	if ( data.id.length ) {

	var new_gift = {
	gift_id: data.id,
	title: data.text
	}

	$( '#wc-free-gift-table' ).trigger( 'addFreeGiftProduct', new_gift );

	// Keep values out of enhanced select container.
	$( this ).val([]).change();

	$('#wc-free-gift-table').sortable('refresh');

	// Enable Publish Button.
	WC_Free_Gift_Coupons.toggleButtonActivity();

	}
	});
	}

	// Toggle coupon type options.
	$( 'select#discount_type' ).change(function(){

	// Get value.
	var select_val = $(this).val();

	$toggle_fields = $( '.coupon_amount_field' );

	coupon_types = jQuery.parseJSON( woocommerce_free_gift_coupon_meta_i18n.coupon_types );

	// Check if coupon type is in supported type list.
	if ( $.inArray( select_val, coupon_types ) !== -1 ) {
	$( '.show_if_free_gift' ).show();

	// Only hide the price field for Free Gift type
	if ( 'free_gift' == select_val ) {
	$toggle_fields.hide();
	} else {
	$toggle_fields.show();
	}

	// Enable/Disable Publish Button.
	WC_Free_Gift_Coupons.toggleButtonActivity();

	} else {
	$( '.show_if_free_gift' ).hide();
	$toggle_fields.show();
	}

	}).change();
	});

	})(jQuery, WC_Free_Gift_Coupons);
	jQuery( document ).ready( function($) {

	/**
	* woocommerce_nyp_update function
	* Wraps all important nyp callbacks for plugins that maybe don't have elements available on load
	* ie: quickview, bundles, etc
	*/
	$.fn.woocommerce_nyp_update = function() {

	/**
	* Name Your Price Handler for individual items
	*/
	$( this ).on( 'woocommerce-nyp-update', function() {

	// Some important objects.
	var $cart = $( this );
	var $nyp = $cart.find( '.nyp' );
	var $nyp_input = $cart.find( '.nyp-input' );
	var $submit = $cart.find( ':submit' );
	var $ajax_cart_button = $cart.find( '.ajax_add_to_cart' );

	// Add a div to hold the error message.
	var $error = $cart.find( '.woocommerce-nyp-message' );

	if ( ! $error.length ){
	$('<div class="woocommerce-nyp-message woocommerce-error"></div>').hide().prependTo($nyp);
	}

	// Clear errors.
	$nyp.removeClass( 'nyp-error' );

	// Skip validation for optional products, ex: grouped/bundled.
	if( $nyp.data( 'optional' ) === 'yes' && $nyp.data( 'optional_status' ) === false ) {
	$error.empty().slideUp();
	return;
	}

	// The default error message.
	var error_message = $nyp.data( 'hide-minimum' ) ? $nyp.data( 'hide-minimum-error' ) : $nyp.data( 'minimum-error' );
	var error_tag = "%%MINIMUM%%";
	var error = false;
	var error_price = ''; // This will hold the formatted price for the error message.

	// The current price.
	var form_price = $nyp_input.val();
	// Convert price to default decimal setting for calculations.
	var form_price_num = woocommerce_nyp_unformat_price( form_price );

	var min_price = parseFloat( $nyp.data( 'min-price' ) );
	var max_price = parseFloat( $nyp.data( 'max-price' ) );
	var annual_minimum = parseFloat( $nyp.data( 'annual-minimum' ) );

	// Get variable billing period data.
	var $nyp_period = $cart.find( '.nyp-period' );
	var form_period = $nyp_period.val();

	// If has variable billing period AND a minimum then we need to annulalize min price for comparison.
	if ( annual_minimum > 0 ){

	// Calculate the price over the course of a year for comparison.
	form_annulualized_price = form_price_num * woocommerce_nyp_params.annual_price_factors[form_period];

	// If the calculated annual price is less than the annual minimum.
	if( form_annulualized_price < annual_minimum ){

	error = annual_minimum / woocommerce_nyp_params.annual_price_factors[form_period];

	// In the case of variable period we need to adjust the error message a bit.
	error_price = woocommerce_nyp_format_price( error, woocommerce_nyp_params.currency_format_symbol, true ) + ' / ' + $nyp_period.find('option[value="' + form_period + '"]').text();

	}

	// Otherwise a regular product or subscription with non-variable periods, compare price directly.
	} else if ( form_price_num < min_price ) {
	error = min_price;
	error_price = woocommerce_nyp_format_price( min_price, woocommerce_nyp_params.currency_format_symbol, true );

	// Check maximum price.
	} else if ( form_price_num > max_price ) {
	error = max_price;
	error_message = $nyp.data( 'maximum-error' );
	error_tag = "%%MAXIMUM%%";
	error_price = woocommerce_nyp_format_price( max_price, woocommerce_nyp_params.currency_format_symbol, true );
	}

	// Maybe auto-format the input.
	if( $.trim( form_price ) != '' ){
	$nyp_input.val( woocommerce_nyp_format_price( form_price_num ) );
	}

	// Always add the price to the button as data for AJAX add to cart.
	$submit.data( $nyp_input.attr( 'name' ), woocommerce_nyp_format_price( form_price_num ) );

	// For grouped products and product bundles, make sure to show error message that has quantity.
	$nyp_closest_form = $nyp.closest( 'form' );
	if( $nyp_closest_form.hasClass( 'grouped_form' ) \|\| $nyp_closest_form.hasClass( 'bundle_form' ) ){
	// Also change the btn value, its different for grouped products.
	$submit = $nyp_closest_form.find( ':submit' );
	}

	// If we've set an error, show message and prevent submit.
	if ( error ){

	// Disable submit.
	$nyp.addClass( 'nyp-error' );

	// Disable core AJAX support.
	if( $ajax_cart_button.length ) {
	$ajax_cart_button.removeAttr( 'data-product_id' );
	}

	// Show error, but not on page load.
	if( $nyp.data( 'initialized' ) === 1 ) {
	error_message = error_message.replace( error_tag, error_price );

	$error.html( error_message ).slideDown( function() {
	$nyp_input.focus();
	});

	// Add disabled btn class.
	$submit.addClass( 'nyp-disabled' );

	}

	// Otherwise allow submit and update.
	} else {

	// Remove error.
	$error.slideUp();

	// Remove disabled btn class.
	$submit.removeClass( 'nyp-disabled' );

	// Restore core AJAX support.
	if( $ajax_cart_button.length ) {
	$ajax_cart_button.attr( 'data-product_id', $nyp.data( 'product_id' ) );
	}

	// Product add ons compatibility.
	$(this).find( '#product-addons-total' ).data( 'price', form_price_num );
	$cart.trigger( 'woocommerce-product-addons-update' );

	// Bundles compatibility.
	$nyp.data( 'price', form_price_num );
	$cart.trigger( 'woocommerce-nyp-updated-item' );
	$( 'body' ).trigger( 'woocommerce-nyp-updated' );

	}

	// For NYP Products in OPC Template.

	// If opc is currently around, and nyp is also found.
	if( $nyp.closest( '.wcopc' ).length > 0 ){

	if( error && resetQty === true ){
	// Reset quantity value of current NYP element.
	$cart.find( '.quantity .qty' ).val(0);

	// Set value to true.
	nypAllowTrigger = true;

	// Reset back
	resetQty = false;
	}

	}

	// Set to initialized.
	$nyp.data( 'initialized', 1 );

	} ); // End woocommerce-nyp-update handler.

	// NYP update on change to any nyp input.
	$( this ).on( 'change', '.nyp-input, .nyp-period', function() {
	var $cart = $(this).closest( '.cart, .nyp-product' );
	$cart.trigger( 'woocommerce-nyp-update' );
	} );

	// Trigger right away.
	$( this ).find( '.nyp-input' ).trigger( 'change' );

	/**
	* Handle NYP Variations
	*/

	if ( $( this ).hasClass( 'variations_form' ) ) {

	// Some important objects.
	var $variation_form = $(this);
	var $add_to_cart = $(this).find( 'button.single_add_to_cart_button' );
	var $nyp = $(this).find( '.nyp' );
	var $nyp_input = $nyp.find( '.nyp-input' );
	var $minimum = $nyp.find( '.minimum-price' );
	var $subscription_terms = $nyp.find( '.subscription-details' );
	var $error = $variation_form.find( '.woocommerce-nyp-message' );

	// The add to cart text.
	var default_add_to_cart_text = $add_to_cart.html();

	// Hide the nyp form by default.
	$nyp.hide();
	$minimum.hide();

	// Listeners

	// When variation is found, decide if it is NYP or not.
	$variation_form

	.on( 'found_variation', function( event, variation ) {

	// Hide any existing error message.
	$error.slideUp();

	// If NYP show the price input and tweak the data attributes.
	if ( typeof variation.is_nyp != undefined && variation.is_nyp == true ) {

	// Switch add to cart button text if variation is NYP.
	$add_to_cart.html( variation.add_to_cart_text );

	// Get the prices out of data attributes.
	var display_price = typeof variation.display_price != 'undefined' ? variation.display_price : '';
	var minimum_price = typeof variation.minimum_price != 'undefined' ? variation.minimum_price : '';
	var maximum_price = typeof variation.maximum_price != 'undefined' ? variation.maximum_price : '';

	// Maybe auto-format the input.
	if( $.trim( display_price ) != '' ){
	$nyp_input.val( woocommerce_nyp_format_price( display_price ) );
	} else {
	$nyp_input.val( '' );
	}

	// Maybe show subscription terms.
	if( $subscription_terms.length && variation.subscription_terms ){
	$subscription_terms.html( variation.subscription_terms );
	}

	// Maybe show minimum price html.
	if( variation.minimum_price_html ){
	$minimum.html( variation.minimum_price_html ).show();
	} else {
	$minimum.hide();
	}

	// Set the NYP data attributes for JS validation on submit.
	$nyp.data( 'min-price', minimum_price ).slideDown();
	$nyp.data( 'max-price', maximum_price );

	// Toggle minimum error message between explicit and obscure.
	$nyp.data( 'hide-minimum', variation.hide_minimum );

	// Product add ons compatibility.
	var form_price_num = woocommerce_nyp_unformat_price( $nyp_input.val() );
	$(this).find( '#product-addons-total' ).data( 'price', form_price_num );
	$(this).trigger( 'woocommerce-product-addons-update' );

	// If not NYP, hide the price input.
	} else {

	// Use default add to cart button text if variation is not NYP.
	$add_to_cart.html( default_add_to_cart_text );

	// Hide.
	$nyp.slideUp();

	}

	} )

	// Hide the price input when reset is clicked.
	.on( 'reset_image', function( event ) {

	$add_to_cart.html( default_add_to_cart_text );
	$nyp.slideUp();
	$error.hide();

	} )

	// Hide the price input when reset is clicked.
	.on( 'click', '.reset_variations', function( event ) {

	$add_to_cart.html( default_add_to_cart_text );
	$nyp.slideUp();
	$error.hide();

	} );

	// Need to re-trigger some things on load since Woo unbinds the found_variation event.
	$( this ).find( '.variations select, .variations input[type=radio]' ).trigger( 'change' );

	}


	} // End fn.woocommerce_nyp_update().

	/**
	* Run when Quick view item is launched.
	*/
	$( 'body' ).on( 'quick-view-displayed', function() {
	$( 'body' ).find( '.cart:not(.cart_group)' ).each( function() {
	$( this ).woocommerce_nyp_update();
	} );
	} );

	/**
	* Run when a Composite component is re-loaded.
	*/
	$( 'body .component' ).on( 'wc-composite-component-loaded', function() {
	$( this ).find( '.cart:not(.cart_group)' ).each( function() {
	$( this ).woocommerce_nyp_update();
	} );
	} );

	/**
	* Run on load.
	*/
	$( 'body' ).find( '.cart:not(.cart_group, .grouped_form)' ).each( function() {
	$( this ).woocommerce_nyp_update();
	} );

	/**
	* Run on load for grouped products.
	*/
	$( 'body .grouped_form' ).find( '.nyp-product' ).each( function() {
	$( this ).woocommerce_nyp_update();
	} );

	/**
	* Compatibility with optional grouped products.
	*/
	$( 'body .grouped_form .qty' ).on( 'change', function() {

	var $nyp = $(this).closest( 'tr' ).find( '.nyp' );

	if( $nyp.length ) {
	if( $(this).val() > 0 ) {
	$nyp.data( 'optional_status', true );
	} else {
	$nyp.data( 'optional_status', false );
	}
	}

	} ).change();


	/**
	* Beginning of OPC compatibilty.
	* If opc is currently around, and nyp is also found, to preserve resource :)
	*/
	if( $( 'body .wcopc' ).length > 0 && $( 'body .wcopc .nyp' ).length > 0 ){
	/**
	* Variables to be used within this scope
	*/
	// Store the destroyed bind here, access anywhere
	var bindStorer = null;

	// Determines if we are to reset qty value in 'woocommerce-nyp-update' function.
	var resetQty = false;

	/**
	* Should we allow .trigger( 'woocommerce-nyp-update' ); in event opc_validate_add_remove_product
	* This is useful when the 2 events "input and change" are running, and along the line, qty is already set to 0
	* before the second event runs, cause if qty is already zero before second event runs, opc will go allowed to validate.
	*/
	var nypAllowTrigger = false;

	/**
	* Validate One Page Checkout ajax add to cart.
	*/
	$( 'body' ).on( 'opc_validate_add_remove_product', function( e, $triggeredBy ) {
	var valid = true;
	var $cart = $triggeredBy.closest( '.cart' );
	var $nyp = $cart.find( '.nyp' );
	var $qty = $cart.find( '.quantity .qty' );

	if( $qty.val() > 0 \|\| nypAllowTrigger === true ) {
	$cart.trigger( 'woocommerce-nyp-update' );
	if( $nyp.hasClass( 'nyp-error' ) ) {
	valid = false;
	}
	}
	return valid;
	});

	/**
	* PreBind Function
	*
	* Helps to trigger an event before its ancestors :)
	* This helps to make our validation trigger before that of opc
	* helps to solve the issue of not having to add a snippet to the one-page-checkout.js file ;)
	* @reference https://stackoverflow.com/a/10413124/5510038
	*/
	$.fn.preBind = function( type, data, fn ) {
	this.each( function(){
	var $this = $( this );

	// Add nyp namespace to our event for easy recognition.
	$this.bind( type + '.nyp', data, fn );

	var currentBindings = $this.data( 'events' )[type];

	if ( $.isArray( currentBindings ) ){
	currentBindings.unshift( currentBindings.pop() );
	}
	});
	return this;
	};


	/**
	* Extract Handler Function
	*
	* Helps to remove the callback function attached to the element event
	* @return Array
	*/
	$.fn.nypExtractEventBinding = function( type, data, fn ) {
	var newBindings = {};
	var i = 0;
	this.each( function(){
	var $this = $( this );

	// If a bind element is to be destroyed
	if ( undefined !== data && data.bindDestroy === true ){
	// Delete only from element without event namespace nyp
	$this.data( 'events' )[type].forEach( function( item, index, object ){

	if( item.namespace !== "nyp" ){
	// store and remove from element.
	newBindings[i] = item;
	object.splice( index, 1 );
	}
	});
	}
	++i;
	});
	return newBindings;
	};

	/**
	* Run by our own ocp quantity input to change default behaviour of the opc version
	* @param e - event
	* @param that - this object
	*/
	var wcNypOpcValidate = function( e, that ) {
	var $input = $( that );

	// Get the element opc uses to trigger validation
	var $opcSelector = $( '#opc-product-selection input[type="number"][data-add_to_cart]' );
	var nypOpcValidTrigger = $( 'body' ).triggerHandler( 'opc_validate_add_remove_product', [ $input ] );

	// Set nyp Allowed trigger to false now.
	nypAllowTrigger = false;

	if( nypOpcValidTrigger === false ) {
	// Destroy bind.
	// You can get the function handler of an event and store. :)
	// Storing the event function on opc js file.
	var storeBindChange = $input.nypExtractEventBinding( 'change', { "bindDestroy": true } );
	var storeBindInput = $input.nypExtractEventBinding( 'input', { "bindDestroy": true } );

	// Store anyone of the above only when there's a value.
	bindStorer = ( JSON.stringify(storeBindInput) !== "{}" ? storeBindInput : bindStorer );

	// Allow quantity reset.
	resetQty = true;

	// Prevent opc trigger when running first time.
	e.stopImmediatePropagation();
	}
	else{
	// On and re-add the handler to retrigger for next time. :)
	if(bindStorer != null){
	// Disable qauntity reset.
	resetQty = false;

	// Turn back on.
	$opcSelector.on( 'input change', bindStorer[0]['handler'] );
	}

	}
	};

	/**
	* Compatibility with Validation One Page Checkout ajax add to cart.
	* Get the selector that opc uses to trigger on change,input and prebind our function to run before it
	* I guess you can call this technique being the flash :)
	*/
	var $wcNypOpcSelector = $( '#opc-product-selection input[type="number"][data-add_to_cart]' );

	// Prebind for change.
	$wcNypOpcSelector.preBind( 'change', function( e ){
	wcNypOpcValidate( e, this );
	});
	// Prebind for input.
	$wcNypOpcSelector.preBind( 'input', function( e ){
	wcNypOpcValidate( e, this );
	});
	}
	// End of OPC Compatibility.

	/**
	* Validate on submit.
	*/
	$( document.body ).on( 'click', '.single_add_to_cart_button', function(e) {
	var valid = true;
	$( '.nyp' ).each( function() {
	$( this ).woocommerce_nyp_update();
	if( $( this ).hasClass( 'nyp-error' ) ) {
	valid = false;
	}
	});

	if( ! valid ) {
	e.preventDefault();
	}

	});

	/**
	* Helper functions
	*/
	// Format the price with accounting.js.
	function woocommerce_nyp_format_price( price, currency_symbol, format ){

	if ( typeof currency_symbol === 'undefined' ) {
	currency_symbol = '';
	}

	if ( typeof format === 'undefined' ) {
	format = false;
	}

	var currency_format = format ? woocommerce_nyp_params.currency_format : '%v';

	return accounting.formatMoney( price, {
	symbol : currency_symbol,
	decimal : woocommerce_nyp_params.currency_format_decimal_sep,
	thousand: woocommerce_nyp_params.currency_format_thousand_sep,
	precision : woocommerce_nyp_params.currency_format_num_decimals,
	format: currency_format
	}).trim();

	}

	// Get absolute value of price and turn price into float decimal.
	function woocommerce_nyp_unformat_price( price ){
	return Math.abs( parseFloat( accounting.unformat( price, woocommerce_nyp_params.currency_format_decimal_sep ) ) );
	}

	} );