Get the value of the highest price in woocommerce cart

Question

I have some custom calculation in my woocommerce project and need to get the most expensive product in my cart to apply the correct (insurance) fee.

It's working so far with this code:

/**
 * use woocommerce fee api
 * calculate insurances and assign to checkout
 */

public function add_cart_versicherung_fee() {
    global $woocommerce;

    session_start();

    if ( isset( $_SESSION['versicherung_one'] ) ) {
        foreach ( $_SESSION['versicherung_one'] as $key => $value ) {
            if ( $value == 'ja-ohne-sb' ) {

                $fee = [];

                $prices = [
                    300  => 26,
                    400  => 29,
                    500  => 36,
                    600  => 39,
                    800  => 44,
                    1000 => 49
                ];

                $total = WC()->cart->cart_contents_total;

                foreach ( $prices as $amount => $fee_value ) {

                    if ( $total < $amount ) {
                        array_push( $fee, $amount );
                    }
                }

                $current_fee = $prices[ $fee[0] ];


                WC()->cart->add_fee( '1. Teilnehmer: Versicherung (ohne Selbstbeteiligung)', $current_fee );

            } elseif ( $value == 'ja-ohne-sb-jahr' ) {

                $fee = [];

                $prices = [
                    750  => 49,
                    1000 => 59
                ];

                $total = WC()->cart->cart_contents_total;

                foreach ( $prices as $amount => $fee_value ) {

                    if ( $total < $amount ) {
                        array_push( $fee, $amount );
                    }
                }

                $current_fee = $prices[ $fee[0] ];


                WC()->cart->add_fee( '1. Teilnehmer: Jahresversicherung (ohne Selbstbeteiligung)', $current_fee );

            } elseif ( $value == 'ja-mit-sb' ) {

                $fee = [];

                $prices = [
                    300  => 14,
                    400  => 18,
                    500  => 22,
                    600  => 28,
                    800  => 34,
                    1000 => 39
                ];

                $total = WC()->cart->cart_contents_total;

                foreach ( $prices as $amount => $fee_value ) {

                    if ( $total < $amount ) {
                        array_push( $fee, $amount );
                    }
                }

                $current_fee = $prices[ $fee[0] ];

                WC()->cart->add_fee( '1. Teilnehmer: Versicherung (mit Selbstbeteiligung)', $current_fee );

            } elseif ( $value == 'ja-mit-sb-jahr' ) {

                $fee = [];

                $prices = [
                    750  => 29,
                    1000 => 34
                ];

                $total = WC()->cart->cart_contents_total;

                foreach ( $prices as $amount => $fee_value ) {

                    if ( $total < $amount ) {
                        array_push( $fee, $amount );
                    }
                }

                $current_fee = $prices[ $fee[0] ];

                WC()->cart->add_fee( '1. Teilnehmer: Jahresversicherung (mit Selbstbeteiligung) ', $current_fee );

            } elseif ( $value == 'nein' ) {

                WC()->cart->add_fee( '1. Teilnehmer: Keine Versicherung', 0 );

            }
        }
    }

But it takes the total cart price at the end. I want that the different insurances fees to orientate towards the most expensive product price.

Any ideas how I could get the value for $total of what I need?

Thanks for any help.

Answer 1

If I have correctly understood, try the following, where you will get the highest product price in cart and the corresponding fee will be applied:

public function add_cart_versicherung_fee() {
    session_start();

    if ( isset( $_SESSION['versicherung_one'] ) ) {

    $fee_rates = [
        'ja-mit-sb' => [
            14 => [0, 300],
            18 => [300, 400],
            22 => [400, 500],
            28 => [500, 600],
            34 => [600, 800],
            39 => [800, 1000],
        ],
        'ja-ohne-sb' => [
            26 => [0, 300],
            29 => [300, 400],
            36 => [400, 500],
            39 => [500, 600],
            44 => [600, 800],
            49 => [800, 1000],
        ],
       'ja-mit-sb-jahr' => [
            29 => [0, 750],
            34 => [750, 1000],

        ],
        'ja-ohne-sb-jahr' => [
            49 => [0, 750],
            59 => [750, 1000],
        ],
        'nein' => 0,
    ];

    $texts = [
        'ja-ohne-sb'        => 'Versicherung (ohne Selbstbeteiligung)',
        'ja-ohne-sb-jahr'   => 'Jahresversicherung (ohne Selbstbeteiligung)',
        'ja-mit-sb'         => 'Versicherung (mit Selbstbeteiligung)',
        'ja-mit-sb-jahr'    => 'Jahresversicherung (mit Selbstbeteiligung)',
        'nein'              => 'Keine Versicherung',
    ];

        $product_prices = [];
        $fee = 0;

        // Loop Through cart items - Collect product prices
        foreach ( WC()->cart->get_cart() as $cart_item ) {
            $product_prices[] = $cart_item['data']->get_price();
        }

        // Sorting prices DESC and keep highest price
        rsort($product_prices); // Sorting prices (Desc)
        $highest_price = reset($product_prices);

        // Loop through versicherung session array
        foreach ( $_SESSION['versicherung_one'] as $value ) {
            if ( isset( $fee_rates[$value]) ) {

                // Loop through fee rates multi array to get the fee
                foreach ( $fee_rates[$value] as $rate => $range ) {
                    if( $value == 'nein' ) break;

                    if ( $highest_price > $range[0] && $highest_price <= $range[1]) {
                        $fee = $rate;
                        break;
                    }
                }

                WC()->cart->add_fee( '1. Teilnehmer: '.$texts[$value], $fee );
                break;
            }
        }
    }
}

If needed, for product price including or excluding taxes you can replace this line:

$product_prices[] = $cart_item['data']->get_price();

1) product price including taxes:

$product_prices[] = wc_get_price_including_tax( $cart_item['data'] );

2) product price excluding taxes:

$product_prices[] = wc_get_price_excluding_tax( $cart_item['data'] );