installed plugin Easy Digital Downloads version 3.1.0.3

wp-content/plugins/easy-digital-downloads/includes/gateways/paypal/buy-now.php

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+<?php
+/**
+ * PayPal Commerce "Buy Now" Buttons
+ *
+ * @package    easy-digital-downloads
+ * @subpackage Gateways\PayPal
+ * @copyright  Copyright (c) 2021, Sandhills Development, LLC
+ * @license    GPL2+
+ */
+
+namespace EDD\Gateways\PayPal;
+
+/**
+ * Determines whether or not Buy Now is enabled for PayPal.
+ *
+ * @since 2.11
+ * @return bool
+ */
+function is_buy_now_enabled() {
+	return edd_shop_supports_buy_now() && array_key_exists( 'paypal_commerce', edd_get_enabled_payment_gateways() );
+}
+
+/**
+ * Sets the gateway to `paypal_commerce` when building straight to gateway data.
+ * This is technically already set via `edd_build_straight_to_gateway_data()` but we want
+ * to make 100% sure we override PayPal Standard when PayPal Commerce is enabled.
+ *
+ * @param array $purchase_data
+ *
+ * @since 2.11
+ * @return array
+ */
+function straight_to_gateway_data( $purchase_data ) {
+	if ( is_buy_now_enabled() ) {
+		$_REQUEST['edd-gateway']  = 'paypal_commerce';
+		$purchase_data['gateway'] = 'paypal_commerce';
+	}
+
+	return $purchase_data;
+}
+
+add_filter( 'edd_straight_to_gateway_purchase_data', __NAMESPACE__ . '\straight_to_gateway_data' );
+
+/**
+ * Adds the `edd-paypal-checkout-buy-now` class to qualified shortcodes.
+ *
+ * @param array $args
+ *
+ * @since 2.11
+ * @return array
+ */
+function maybe_add_purchase_link_class( $args ) {
+	if ( ! is_buy_now_enabled() ) {
+		return $args;
+	}
+
+	// Don't add class if "Free Downloads" is active and available for this download.
+	if ( function_exists( 'edd_free_downloads_use_modal' ) ) {
+		if ( edd_free_downloads_use_modal( $args['download_id'] ) && ! edd_has_variable_prices( $args['download_id'] ) ) {
+			return $args;
+		}
+	}
+
+	// Don't add class if Recurring is enabled for this download.
+	if ( function_exists( 'edd_recurring' ) ) {
+		// Overall download is recurring.
+		if ( edd_recurring()->is_recurring( $args['download_id'] ) ) {
+			return $args;
+		}
+
+		// Price ID is recurring.
+		if ( ! empty( $args['price_id'] ) && edd_recurring()->is_price_recurring( $args['download_id'], $args['price_id'] ) ) {
+			return $args;
+		}
+	}
+
+	if ( ! empty( $args['direct'] ) ) {
+		$args['class'] .= ' edd-paypal-checkout-buy-now';
+	}
+
+	return $args;
+}
+
+add_filter( 'edd_purchase_link_args', __NAMESPACE__ . '\maybe_add_purchase_link_class' );
+
+/**
+ * Registers PayPal Commerce JavaScript if using "direct" buy now links.
+ *
+ * @param int   $download_id ID of the download.
+ * @param array $args        Purchase link arguments.
+ *
+ * @since 2.11
+ */
+function maybe_enable_buy_now_js( $download_id, $args ) {
+	if ( ! empty( $args['direct'] ) && is_buy_now_enabled() ) {
+		register_js( true );
+		$timestamp = time();
+		?>
+		<input type="hidden" name="edd_process_paypal_nonce" value="<?php echo esc_attr( wp_create_nonce( 'edd_process_paypal' ) ); ?>">
+		<input type="hidden" name="edd-process-paypal-token" data-timestamp="<?php echo esc_attr( $timestamp ); ?>" data-token="<?php echo esc_attr( \EDD\Utils\Tokenizer::tokenize( $timestamp ) ); ?>" />
+		<?php
+	}
+}
+
+add_action( 'edd_purchase_link_end', __NAMESPACE__ . '\maybe_enable_buy_now_js', 10, 2 );