commission-tax-on-admin-commission-only.php

//Commission tax only on admin commission amount.
add_filter( 'wcfmmp_commission_deducted_tax', function( $commission_tax, $vendor_id, $product_id, $variation_id, $order_id, $total_commission, $commission_rule, $item_id ) {
    global $WCFMmp;
    if( apply_filters( 'wcfm_is_admin_fee_mode', false ) ) {
        remove_filter( 'wcfmmp_commission_deducted_tax', array($WCFMmp->wcfmmp_commission, 'wcfmmp_commission_deducted_tax_admin_mode_handler' ), 100 );
        $admin_commission_amount = calculate_commission_tax_on_admin_commission($item_id, $commission_tax, $vendor_id, $product_id, $variation_id, $order_id, $commission_rule);
        $commission_tax = $admin_commission_amount * ( (float)$commission_rule['tax_percent'] / 100 );
    }
    return $commission_tax;
}, 99, 8 );

function calculate_commission_tax_on_admin_commission($item_id, $commission_tax, $vendor_id, $product_id, $variation_id, $order_id, $commission_rule) {
    global $WCFMmp;
    if( apply_filters( 'wcfm_is_admin_fee_mode', false ) ) {
        $commission_meta_key = '_wcfmmp_commission_tax_only_on_admin_commission';
        if($item_commission_tax = wc_get_order_item_meta( $item_id, $commission_meta_key, true )) {
            return $item_commission_tax;
        }

        if( isset( $commission_rule['tax_enable'] ) && ( $commission_rule['tax_enable'] == 'yes' ) ) {
            $line_item = new WC_Order_Item_Product($item_id);
            $order = $line_item->get_order();
            $quantity = $line_item->get_quantity();
            $refunded_qty = $item_price = $item_qty = 0;
            if ( $refunded_amount = $order->get_total_refunded_for_item( absint( $item_id ) ) ) {
                $refunded_qty = $order->get_qty_refunded_for_item( absint( $item_id ) );
                $refunded_qty = $refunded_qty * -1;
            }
            $item_qty = $quantity - $refunded_qty;
            if( $WCFMmp->wcfmmp_vendor->is_vendor_deduct_discount( $vendor_id, $order_id ) ) {
                $item_price = $line_item->get_total() - $refunded_amount;
            } else {
                $item_price = $line_item->get_subtotal() - $refunded_amount;
            }
            if( apply_filters( 'wcfmmp_is_allow_commission_on_tax', false ) ) {
                $item_price += $line_item->get_total_tax();
            }
            if( apply_filters( 'wcfmmp_is_allow_commission_on_shipping', false ) ) {
                $shipping_items = $order->get_items( 'shipping' );
                $package_qty = 1;
                foreach ( $shipping_items as $shipping_item_id => $shipping_item ) {
                    $order_item_shipping = new WC_Order_Item_Shipping( $shipping_item_id );
                    $shipping_vendor_id = $order_item_shipping->get_meta( 'vendor_id', true );
                    if ( ( $shipping_vendor_id > 0 ) && ( $shipping_vendor_id == $vendor_id ) ) {
                        $shipping_item_total = $order_item_shipping->get_total() + $order_item_shipping->get_total_tax();
                        $package_qty = $order_item_shipping->get_meta('package_qty', true);
                        $item_price += $shipping_item_total / $package_qty;
                    }
                }
            }
            $commission_amount = $WCFMmp->wcfmmp_commission->wcfmmp_get_order_item_commission( $order_id, $vendor_id, $product_id, $variation_id, $item_price, $item_qty, $commission_rule );
            $admin_commission_amount = $item_price - $commission_amount;

            wc_update_order_item_meta( $item_id, $commission_meta_key, $admin_commission_amount );

            return $admin_commission_amount;
        }
    }
    return $commission_tax;
}

//Delete order meta keys on Order reset
add_action( 'wcfm_manual_order_processed', function( $order_id, $order_posted, $order = '' ) {
    global $wpdb;
    if ( ! $order_id ) return;
    if ( ! $order ) $order = wc_get_order( $order_id );
    if ( ! is_a( $order, 'WC_Order' ) ) return;

    $marketplace_orders = $wpdb->get_results(  $wpdb->prepare( "SELECT ID, item_id from {$wpdb->prefix}wcfm_marketplace_orders WHERE order_id = %d", $order_id ) );
    foreach( $marketplace_orders as $marketplace_order ) {
        wc_delete_order_item_meta( $marketplace_order->item_id, '_wcfmmp_commission_tax_only_on_admin_commission' );
    }
}, 10, 3 );