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<?php |
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/** |
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* Add support for Google Analytics e-commerce events for AMP pages. |
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* |
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* @package Jetpack |
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*/ |
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/** |
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* Bail if accessed directly |
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*/ |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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/** |
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* Jetpack_Google_AMP_Analytics class. |
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*/ |
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class Jetpack_Google_AMP_Analytics { |
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/** |
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* Constructor method. |
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*/ |
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public function __construct() { |
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$this->maybe_load_hooks(); |
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} |
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/** |
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* Maybe load the hooks. |
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* Checks if its AMP request, if WooCommerce is available, if there's tracking code and in tracking is enabled. |
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*/ |
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public function maybe_load_hooks() { |
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if ( ! class_exists( 'Jetpack_AMP_Support' ) || ! Jetpack_AMP_Support::is_amp_request() ) { |
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return; |
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} |
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if ( ! class_exists( 'WooCommerce' ) ) { |
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return; |
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} |
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if ( ! Jetpack_Google_Analytics_Options::has_tracking_code() ) { |
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return; |
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} |
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if ( ! Jetpack_Google_Analytics_Options::track_add_to_cart_is_enabled() ) { |
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return; |
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} |
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add_action( 'woocommerce_add_to_cart', array( $this, 'amp_add_to_cart' ), 10, 6 ); |
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add_action( 'woocommerce_thankyou', array( $this, 'amp_after_purchase' ), 10, 1 ); |
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add_action( 'wp_footer', array( $this, 'amp_send_ga_events' ) ); |
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} |
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/** |
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* Generate a GA event when adding an item to the cart. |
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* |
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* @param string $cart_item_key Cart item key. |
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* @param string $product_id Product ID. |
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* @param int $quantity Product quantity. |
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* @param int $variation_id Product variation ID. |
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* @param object $variation Product variation. |
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* @param object $cart_item_data Cart item data. |
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*/ |
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public function amp_add_to_cart( $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data ) { |
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$product = wc_get_product( $product_id ); |
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if ( $product ) { |
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$product_sku = Jetpack_Google_Analytics_Utils::get_product_sku_or_id( $product ); |
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$product_name = $product->get_name(); |
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$events = WC()->session->get( 'wc_ga_events' ); |
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$events[] = array( |
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'type' => 'add', |
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'ga_params' => array( |
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'pa' => 'add', |
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'pr1id' => sanitize_text_field( $product_sku ), |
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'pr1nm' => sanitize_text_field( $product_name ), |
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'pr1qt' => absint( $quantity ), |
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), |
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); |
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WC()->session->set( 'wc_ga_events', $events ); |
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} |
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} |
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/** |
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* Generate a GA event when removing an item to the cart. |
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* |
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* @param int $order_id The Order ID. |
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*/ |
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public function amp_after_purchase( $order_id ) { |
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$events = WC()->session->get( 'wc_ga_events' ); |
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$order = wc_get_order( $order_id ); |
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$order_total = $order->get_total(); |
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$order_tax = $order->get_total_tax(); |
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$i = 1; |
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$event = array( |
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'type' => 'purchase', |
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'ga_params' => array( |
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'pa' => 'purchase', |
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'ti' => absint( $order_id ), |
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'tr' => (float) $order_total, |
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'tt' => (float) $order_tax, |
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), |
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); |
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foreach ( $order->get_items() as $item_id => $item ) { |
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$product = $item->get_product(); |
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if ( $product ) { |
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$event['ga_params'][ 'pr' . $i . 'id' ] = sanitize_text_field( Jetpack_Google_Analytics_Utils::get_product_sku_or_id( $product ) ); |
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$event['ga_params'][ 'pr' . $i . 'nm' ] = sanitize_text_field( $item->get_name() ); |
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$event['ga_params'][ 'pr' . $i . 'qt' ] = absint( $item->get_quantity() ); |
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$i++; |
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} |
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} |
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$events[] = $event; |
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WC()->session->set( 'wc_ga_events', $events ); |
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} |
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/** |
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* Send the stored events to GA. |
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*/ |
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public function amp_send_ga_events() { |
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if ( 'GET' !== strtoupper( $_SERVER['REQUEST_METHOD'] ) ) { |
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return; |
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} |
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$events = WC()->session->get( 'wc_ga_events' ); |
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if ( ! is_array( $events ) ) { |
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return; |
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} |
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foreach ( $events as $i => $event ) { |
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?> |
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<amp-analytics type='googleanalytics'> |
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<script type='application/json'> |
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{ |
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"vars": { |
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"account": "<?php echo esc_html( Jetpack_Google_Analytics_Options::get_tracking_code() ); ?>" |
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}, |
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"triggers": { |
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"trackPageview": { |
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"on": "visible", |
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"request": "pageview", |
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"extraUrlParams": <?php echo wp_json_encode( $event['ga_params'] ); ?> |
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} |
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} |
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} |
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</script> |
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</amp-analytics> |
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<?php |
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array_shift( $events ); |
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} |
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WC()->session->set( 'wc_ga_events', $events ); |
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} |
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} |
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Automattic /
jetpack
