File class-wc-stripe-frontend-scripts.php

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<?php
defined( 'ABSPATH' ) || exit();

/**
 * Handles scrip enqueuement and output of params needed by the plugin.
 *
 * @package Stripe/Classes
 * @author PaymentPlugins
 */
class WC_Stripe_Frontend_Scripts {

    public $prefix = 'wc-stripe-';

    public $registered_scripts = array();

    public $enqueued_scripts = array();

    public $localized_scripts = array();

    public $localized_data = array();

    public $global_scripts = array(
        'external' => 'https://js.stripe.com/v3/',
        'gpay'     => 'https://pay.google.com/gp/p/js/pay.js'
    );

    public function __construct() {
        add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
        add_action( 'wp_print_scripts', array( $this, 'localize_scripts' ), 5 );
        add_action( 'wp_print_footer_scripts', array( $this, 'localize_scripts' ), 5 );
        add_action( 'wp_print_footer_scripts', array( $this, 'print_footer_scripts' ), 6 );
    }

    /**
     * Enqueue all frontend scripts needed by the plugin
     */
    public function enqueue_scripts() {
        // register global scripts
        foreach ( $this->global_scripts as $handle => $src ) {
            $this->register_script( $handle, $src );
        }

        $this->register_script( 'form-handler', $this->assets_url( 'js/frontend/form-handler.js' ), array( 'jquery' ) );

        // register scripts that aren't part of gateways
        $this->register_script( 'wc-stripe', $this->assets_url( 'js/frontend/wc-stripe.js' ),
            array(
                'jquery',
                $this->get_handle( 'external' ),
                'woocommerce',
                $this->get_handle( 'form-handler' )
            ) );

        // mini cart is not relevant on cart and checkout page.
        if ( ! is_checkout() && ! is_cart() ) {
            foreach ( WC()->payment_gateways()->payment_gateways() as $gateway ) {
                if ( $gateway instanceof WC_Payment_Gateway_Stripe && $gateway->is_available() && $gateway->mini_cart_enabled() ) {
                    $gateway->enqueue_frontend_scripts( 'mini_cart' );
                }
            }
        }

        if ( function_exists( 'wp_add_inline_script' ) ) {
            wp_add_inline_script( $this->get_handle( 'wc-stripe' ), '(function(){
                if(window.navigator.userAgent.match(/MSIE|Trident/)){
                    var script = document.createElement(\'script\');
                    script.setAttribute(\'src\', \'' . $this->assets_url( 'js/frontend/promise-polyfill.min.js' ) . '\');
                    document.head.appendChild(script);
                }
            }());' );
        }
    }

    public function localize_scripts() {
        $this->localize_script( 'wc-stripe',
            array(
                'api_key' => wc_stripe_get_publishable_key(),
                'account' => wc_stripe_get_account_id(),
                'page'    => $this->get_page_id(),
                'version' => stripe_wc()->version(),
                'mode'    => wc_stripe_mode()
            ),
            'wc_stripe_params_v3'
        );
        $this->localize_script( 'form-handler',
            array(
                'no_results' => __(
                    'No matches found',
                    'woo-stripe-payment'
                ),
            )
        );
        $this->localize_script( 'wc-stripe', wc_stripe_get_error_messages(), 'wc_stripe_messages' );
        $this->localize_script( 'wc-stripe', wc_stripe_get_checkout_fields(), 'wc_stripe_checkout_fields' );

        // don't need to call localize_scripts twice.
        if ( doing_action( 'wp_print_scripts' ) ) {
            remove_action( 'wp_print_footer_scripts', array( $this, 'localize_scripts' ), 5 );
        }
    }

    public function enqueue_checkout_scripts() {
        $this->enqueue_local_payment_scripts();
    }

    public function enqueue_local_payment_scripts() {
        if ( ! in_array( $this->get_handle( 'local-payment' ), $this->enqueued_scripts ) ) {
            $data = wc_stripe_get_local_payment_params();
            // only enqueue local payment script if there are local payment gateways that have been enabled.
            if ( ! empty( $data['gateways'] ) ) {
                $this->enqueue_script(
                    'local-payment',
                    $this->assets_url( 'js/frontend/local-payment.js' ),
                    array(
                        $this->get_handle( 'external' ),
                        $this->get_handle( 'wc-stripe' ),
                    )
                );
                $this->localize_script( 'local-payment', $data );
            }
        }
    }

    public function register_script( $handle, $src, $deps = array(), $version = '', $footer = true ) {
        $version                    = empty( $version ) && null !== $version ? stripe_wc()->version() : $version;
        $this->registered_scripts[] = $this->get_handle( $handle );
        wp_register_script( $this->get_handle( $handle ), $src, $deps, $version, $footer );
    }

    public function enqueue_script( $handle, $src = '', $deps = array(), $version = '', $footer = true ) {
        $handle  = $this->get_handle( $handle );
        $version = empty( $version ) && null !== $version ? stripe_wc()->version() : $version;
        if ( ! in_array( $handle, $this->registered_scripts ) ) {
            $this->register_script( $handle, $src, $deps, $version, $footer );
        }
        $this->enqueued_scripts[] = $handle;
        wp_enqueue_script( $handle );
    }

    /**
     *
     * @param string $handle
     * @param array $data
     * @param string $object_name
     */
    public function localize_script( $handle, $data, $object_name = '' ) {
        $handle = $this->get_handle( $handle );
        if ( wp_script_is( $handle, 'registered' ) ) {
            $name = str_replace( $this->prefix, '', $handle );
            if ( ! $object_name ) {
                $object_name = str_replace( '-', '_', $handle ) . '_params';
            }
            if ( ! in_array( $object_name, $this->localized_data ) ) {
                $data = apply_filters( 'wc_stripe_localize_script_' . $name, $data, $object_name );
                if ( $data ) {
                    $this->localized_scripts[] = $handle;
                    $this->localized_data[]    = $object_name;
                    wp_localize_script( $handle, $object_name, $data );
                }
            }
        }
    }

    public function get_handle( $handle ) {
        return strpos( $handle, $this->prefix ) === false ? $this->prefix . $handle : $handle;
    }

    /**
     *
     * @param string $uri
     */
    public function assets_url( $uri = '' ) {
        // if minification scripts required, convert the uri to it's min format.
        $uri = ( ( $min = $this->get_min() ) ) ? preg_replace( '/([\w-]+)(\.(?<!min\.)(js|css))$/', '$1' . $min . '$2', $uri ) : $uri;

        return untrailingslashit( stripe_wc()->assets_url( $uri ) );
    }

    public function get_min() {
        return $suffix = SCRIPT_DEBUG ? '' : '.min';
    }

    private function get_page_id() {
        return wc_stripe_get_current_page();
    }

    public function print_footer_scripts() {
        if ( is_checkout() && ! isset( $wp->query_vars['order_pay'] ) && ! is_order_received_page() && ! did_action( 'wc_stripe_blocks_enqueue_styles' ) ) {
            $available_gateways = array_keys( WC()->payment_gateways()->get_available_payment_gateways() );
            $gateways           = array_filter( WC()->payment_gateways()->payment_gateways(), function ( $gateway ) use ( $available_gateways ) {
                return $gateway instanceof WC_Payment_Gateway_Stripe && $gateway->is_available() && ( ! in_array( $gateway->id, $available_gateways ) || ! $gateway->has_enqueued_scripts( $this ) );
            } );
            // If there are entries in the $gateways array that means some plugin filtered out the gateway.
            // It still needs to output its scripts
            foreach ( $gateways as $gateway ) {
                /**
                 * @var WC_Payment_Gateway_Stripe $gateway
                 */
                $gateway->enqueue_frontend_scripts( 'checkout' );
            }
        }
    }
}

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