source: riverbank/1.0.11/functions.php

<?php
/**
 * Riverbank functions file
 *
 * @author Themeisle
 * @package riverbank
 * @since 1.0.0
 */

namespace Riverbank;

/**
 * Bootstrap the theme.
 *
 * @return void
 */
function bootstrap() {
        global $_riverbank_bootstrap_errors;

        $_riverbank_bootstrap_errors = new \WP_Error();

        check_php();

        define_constants();

        check_build_files();

        maybe_add_notices();

        load_sdk();

        load_dependencies();

        run();
}

/**
 * Checks that the PHP version is correct.
 *
 * @return void
 */
function check_php() {
        global $_riverbank_bootstrap_errors;

        if ( version_compare( PHP_VERSION, '7.0' ) > 0 ) {
                return;
        }

        $_riverbank_bootstrap_errors->add(
                'php_version',
                sprintf(
                /* translators: %s message to upgrade PHP to the latest version */
                        __( "Hey, we've noticed that you're running an outdated version of PHP which is no longer supported. Make sure your site is fast and secure, by %1\$s. Riverbank's minimal requirement is PHP%2\$s.", 'riverbank' ),
                        sprintf(
                        /* translators: %s message to upgrade PHP to the latest version */
                                '<a href="https://wordpress.org/support/upgrade-php/">%s</a>',
                                __( 'upgrading PHP to the latest version', 'riverbank' )
                        ),
                        '7.0'
                )
        );
}

/**
 * Define theme constants.
 *
 * @return void
 */
function define_constants() {
        define( 'RIVERBANK_VERSION', '1.0.11' );
        define( 'RIVERBANK_DEBUG', defined( 'WP_DEBUG' ) && WP_DEBUG === true );
        define( 'RIVERBANK_DIR', trailingslashit( get_template_directory() ) );
        define( 'RIVERBANK_URL', trailingslashit( get_template_directory_uri() ) );
}

/**
 * Checks that the build files are present.
 *
 * @return void
 */
function check_build_files() {
        if ( defined( 'RIVERBANK_IGNORE_SOURCE_CHECK' ) ) {
                return;
        }

        $_files_to_check = array(
                RIVERBANK_DIR . 'vendor/autoload.php',
                RIVERBANK_DIR . 'assets/css/build/style.css',
                RIVERBANK_DIR . 'assets/css/build/editor.css',
                RIVERBANK_DIR . 'assets/css/build/style-rtl.css',
                RIVERBANK_DIR . 'assets/css/build/editor-rtl.css',
        );

        foreach ( $_files_to_check as $file ) {
                if ( is_file( $file ) ) {
                        continue;
                }

                global $_riverbank_bootstrap_errors;

                $_riverbank_bootstrap_errors->add(
                        'build_missing',
                        sprintf(
                        /* translators: %s: commands to run the theme */
                                __( 'You appear to be running the Riverbank theme from source code. Please finish installation by running %s.', 'riverbank' ),
                                '<code>composer install --no-dev &amp;&amp; yarn install --frozen-lockfile &amp;&amp; yarn run build</code>'
                        )
                );

                return;
        }
}

/**
 * Adds notices if something went wrong and activates the default theme.
 *
 * @return void
 */
function maybe_add_notices() {
        global $_riverbank_bootstrap_errors;

        if ( ! $_riverbank_bootstrap_errors->has_errors() ) {
                return;
        }

        add_filter( 'template_include', '__return_null', 99 );
        switch_theme( WP_DEFAULT_THEME );
        unset( $_GET['activated'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        add_action(
                'admin_notices',
                function () {
                        global $_riverbank_bootstrap_errors;

                        printf( '<div class="notice notice-error"><p>%1$s</p></div>', wp_kses_post( $_riverbank_bootstrap_errors->get_error_message() ) );
                }
        );
}

/**
 * Load SDK.
 *
 * @return void
 */
function load_sdk() {
        add_filter(
                'themeisle_sdk_products',
                function ( $products ) {
                        $products[] = RIVERBANK_DIR . 'style.css';

                        return $products;
                } 
        );
}

/**
 * Load composer dependencies.
 *
 * @return void
 */
function load_dependencies() {
        $vendor_file = RIVERBANK_DIR . '/vendor/autoload.php';
        if ( is_readable( $vendor_file ) ) {
                require_once $vendor_file;
        }
}

/**
 * Run theme core.
 *
 * @return void
 */
function run() {
        Core::get_instance();
}

bootstrap();