Woo-Commerce(Wordpress) login redirect based on cart

function.php

function woocommerce_custom_redirects() {

    // Case1: Non logged user on checkout page (cart empty or not empty)
    if ( !is_user_logged_in() && is_checkout() )
        wp_redirect( get_permalink( get_option('woocommerce_myaccount_page_id') ) );

    // Case2: Logged user on my account page with something in cart
    if( is_user_logged_in() && !WC()->cart->is_empty() && is_account_page() )
        wp_redirect( get_permalink( get_option('woocommerce_checkout_page_id') ) );
}
add_action('template_redirect', 'woocommerce_custom_redirects');

/* You can write this into function.php file of your active theme or child theme or in any plugin file also.*/