woocom_min_order

add_action( 'woocommerce_check_cart_items', 'spyr_set_min_total' );
function spyr_set_min_total() {
    // Only run in the Cart or Checkout pages
    if( is_cart() || is_checkout() ) {
        global $woocommerce;
        global $product;

        // get user attributes
        $current_user = wp_get_current_user();

        // Set minimum cart total
        if ( wc_customer_bought_product( $current_user->email, $current_user->ID ) ) {
            $minimum_cart_total = 300;
        } else {
            $minimum_cart_total = 100;
        }
        // $minimum_cart_total = 100;

        // Total we are going to be using for the Math
        // This is before taxes and shipping charges
        $total = WC()->cart->subtotal;

        // Compare values and add an error is Cart's total
        // happens to be less than the minimum required before checking out.
        // Will display a message along the lines of
        // A Minimum of 10 USD is required before checking out. (Cont. below)
        // Current cart total: 6 USD
        if( $total <= $minimum_cart_total  ) {
            // Display our error message
            wc_add_notice( sprintf( '<strong>A Minimum of %s %s is required before checking out.</strong>'
                .'<br />Current cart\'s total: %s %s',
                $minimum_cart_total,
                get_option( 'woocommerce_currency'),
                $total,
                get_option( 'woocommerce_currency') ),
            'error' );
        }
    }
}