promotional_rule_type_quantity.inc

<?php
require_once dirname(__FILE__).'/../../promotional_rule/promotional_rule.inc';

class Promotional_Rule_Type_Quantity extends Promotional_Rule
{
    
    
    function __construct($assetid=0)
    {
        parent::__construct($assetid);

    }//end constructor
    
    
    public function getDiscountTypes()
    {
        return Array(
                        'fixed_amount'  => 'Fixed Amount',
                        'percentage'    => 'Percentage',
                    );
        
    }//end getDiscountTypes()
    
    
    public function getDefaultDiscountType()
    {
        return 'fixed_amount';
        
    }//end getDefaultDiscountType()
    
    
    public function getDefaultRuleData()
    {
        return Array(
                        'discount_type' => $this->getDefaultDiscountType(),
                        'discount_options' => Array(),
                    );
        
    }//end getDefaultRuleData()
    
    
    public function evaluate(&$asset_data, $rule_data)
    {
        $price = $asset_data['price'];
        $remaining_quantity = $asset_data['quantity'];
        $discount = 0;
        
        $discount_options = $rule_data['discount_options'];
        $fixed_amount = $rule_data['discount_type'] == 'fixed_amount' ? TRUE : FALSE;
        $discount_options = array_reverse($discount_options, TRUE);
        foreach ($discount_options as $asset_quantity => $discount_amount) {
            if ($remaining_quantity >= $asset_quantity) {
                $quotient = (int) ($remaining_quantity / $asset_quantity);
                $remaining_quantity = $remaining_quantity % $asset_quantity;
                if ($fixed_amount) {
                    $discount += $quotient * $discount_amount;
                } else {
                    $discount += $quotient * ($asset_quantity * $price * $discount_amount / 100);
                }
                
                if ($remaining_quantity == 0) break;
            }
        }
        
        $asset_data['discount'] = $discount;
        
    }//end evaluate()
    
    
}//end class

?>