bitrix catalog calc

gistfile1.php

<?
class nav_catalog{
	function canBuy($arItem){
		if(isset($arItem['OFFERS']) && !empty($arItem['OFFERS'])){
			$can_buys = array();
			foreach($arItem['OFFERS'] as $offer){
				$can_buys[] = self::canBuy($offer); 
			}
			
			$can_buy = "N";
			foreach($can_buys as $one_can_buy){
				if($one_can_buy == "Y"){
					$can_buy = "Y";
					break;
				}
			}
			return $can_buy;
		}elseif(isset($arItem['OFFERS']) && empty($arItem['OFFERS'])){
			return false;
		}else{
			foreach($arItem['PRICES'] as $price){
				break;
			}
			return $price['CAN_BUY'];
		}
	}
	
	function minPrice($arItem, $discount = true ){
		if(isset($arItem['OFFERS']) && !empty($arItem['OFFERS'])){
			$prices = array();
			
			foreach($arItem['OFFERS'] as $offer){
				$prices[] = self::minPrice($offer); //no discount flag because no offers in offers
			}
			
			//pre($prices);
			
			$minPrice = $prices[0]['VALUE'];
			$minPriceKey = 0;
			foreach($prices as $key=>$price){
				$value = $price['VALUE'];
				if($discount){
					if($price['DISCOUNT_VALUE'] < $value){
						$value = $price['DISCOUNT_VALUE'];
					}
				}
				if($minPrice > $value){
					$minPrice = $value;
					$minPriceKey = $key;
				}
			}
			
			return $prices[$minPriceKey];
		}else{
			foreach($arItem['PRICES'] as $price){
				break;
			}
			return $price;
		}
	}
	
	
	function minPriceEx($arElement){
		
		$arMinPrice = array();
		
		if(is_array($arElement["OFFERS"]) && !empty($arElement["OFFERS"])) //Product has offers
		{
			$minItemPrice = 0;
			$minItemPriceFormat = "";
		
			foreach($arElement["OFFERS"] as $arOffer)
			{
				foreach($arOffer["PRICES"] as $code=>$arPrice)
				{
					if($arPrice["CAN_ACCESS"])
					{
						if ($arPrice["DISCOUNT_VALUE"] < $arPrice["VALUE"])
						{
							$minOfferPrice = $arPrice["DISCOUNT_VALUE"];
							$minOfferPriceFormat = $arPrice["PRINT_DISCOUNT_VALUE"];
						}
						else
						{
							$minOfferPrice = $arPrice["VALUE"];
							$minOfferPriceFormat = $arPrice["PRINT_VALUE"];
						}

						if ($minItemPrice > 0 && $minOfferPrice < $minItemPrice)
						{
							$minItemPrice = $minOfferPrice;
							$minItemPriceFormat = $minOfferPriceFormat;
							$arMinPrice = $arPrice;
						}
						elseif ($minItemPrice == 0) //for first step
						{
							$minItemPrice = $minOfferPrice;
							$minItemPriceFormat = $minOfferPriceFormat;
							$arMinPrice = $arPrice;
						}
					}
				}
			}
			if ($minItemPrice > 0)
			{
				$arElement["MIN_OFFER_PRICE"] = $minItemPrice;
				$arElement["PRINT_MIN_OFFER_PRICE"] = $minItemPriceFormat;
			}
		}else{
			$minItemPrice = 0;
			$minItemPriceFormat = "";
			
			foreach($arElement["PRICES"] as $code=>$arPrice){
				
				if($arPrice["CAN_ACCESS"]){
					
					if ($arPrice["DISCOUNT_VALUE"] < $arPrice["VALUE"]){
						
						$minOfferPrice = $arPrice["DISCOUNT_VALUE"];
						$minOfferPriceFormat = $arPrice["PRINT_DISCOUNT_VALUE"];
					
					}else{
						
						$minOfferPrice = $arPrice["VALUE"];
						$minOfferPriceFormat = $arPrice["PRINT_VALUE"];
					}

					if ($minItemPrice > 0 && $minOfferPrice < $minItemPrice)
					{
						$minItemPrice = $minOfferPrice;
						$minItemPriceFormat = $minOfferPriceFormat;
						$arMinPrice = $arPrice;
					}
					elseif ($minItemPrice == 0) //for first step
					{
						$minItemPrice = $minOfferPrice;
						$minItemPriceFormat = $minOfferPriceFormat;
						$arMinPrice = $arPrice;
					}
				}
			}
			
		}
		
		return $arMinPrice;
	}
	
}