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add_filter('b2bking_product_min_value', 'set_minimum_product_quantity', 10, 3);

function set_minimum_product_quantity($have, $product_id, $user_id) {
    // Check if user is B2B
    if (b2bking()->is_b2b_user()) {
        global $wpdb;
        
        // Query database directly for stock status and quantity
        $stock_status = $wpdb->get_var($wpdb->prepare(
            "SELECT meta_value FROM {$wpdb->postmeta} 
            WHERE post_id = %d AND meta_key = '_stock_status'",
            $product_id
        ));
        
        
        // Set minimum to 3 if stock is 0 or out of stock
        if ($stock_status === 'outofstock' || $stock_status === 'onbackorder') {
            return 3;
        }
    }
    
    // Return original value if conditions not met
    return $have;
}