<?php

class ICMLLoader {
	
	public $iblocks;
	public $filename;
        public $articleProperties;
	public $application;
	public $encoding = 'utf-8';
	
	protected $fp;
        protected $mainSection = 1000000;
        
	public function Load()
	{
            global $USER;
            if(!isset($USER))
                $USER = new CUser;
            
            if (count($this->iblocks) < count($this->articleProperties))
                return false;
            
            $categories = $this->GetCategories();

            $offers = $this->GetOffers();

            $this->PrepareFile();

            $this->PreWriteCatalog();

            $this->WriteCategories($categories);
            $this->WriteOffers($offers);

            $this->PostWriteCatalog();

            $this->CloseFile();
            return true;
		
	}
	
	protected function PrepareValue($text)
        {
            $newText = $this->application->ConvertCharset($text, LANG_CHARSET, $this->encoding);
            $newText = strip_tags($newText);
            $newText = str_replace("&", "&#x26;", $newText);
            return $newText;
        }
	
	protected function PrepareFile()
	{
            $fullFilename = $_SERVER["DOCUMENT_ROOT"] . $this->filename;
            CheckDirPath($fullFilename);

            if (!$this->fp = @fopen($fullFilename, "w"))
                    return false;
            else
                return true;
	}
	
	protected function PreWriteCatalog()
	{
            @fwrite($this->fp, "<yml_catalog date=\"" . $this->PrepareValue(Date("Y-m-d H:i:s")) . "\">\n");
            @fwrite($this->fp, "<shop>\n");

            @fwrite($this->fp, "<name>". $this->PrepareValue(COption::GetOptionString("main", "site_name", ""))."</name>\n");

            @fwrite($this->fp, "<company>".$this->PrepareValue(COption::GetOptionString("main", "site_name", ""))."</company>\n");

	}
	
	protected function WriteCategories($categories)
	{
            @fwrite($this->fp, "<categories>\n");
            foreach ($categories as $category) {
                @fwrite($this->fp, $category . "\n");
            }
            @fwrite($this->fp, "</categories>\n");
	}
	protected function WriteOffers($offers)
	{
            @fwrite($this->fp, "<offers>\n");
            foreach ($offers as $offer) {
                @fwrite($this->fp, $offer . "\n");
            }
            @fwrite($this->fp, "</offers>\n");
	}
	
	protected function PostWriteCatalog()
	{
            @fwrite($this->fp, "</shop>\n");
            @fwrite($this->fp, "</yml_catalog>\n");
	}
	
	protected function CloseFile()
	{
            @fclose($this->fp);
	}
	
	
	protected function GetCategories()
	{
            $categories = array();
            foreach ($this->iblocks as $id) 
            {
                $filter = Array(
                                "IBLOCK_ID" => $id,
                                "ACTIVE" => "Y",
                                "IBLOCK_ACTIVE" => "Y",
                                "GLOBAL_ACTIVE" => "Y"
                                );


                $dbRes = CIBlockSection::GetList(array("left_margin" => "asc"), $filter);
                while ($arRes = $dbRes->Fetch())
                {
                        $categories[] = $this->BuildCategory($arRes);
                }
                if (count($categories) == 0)
                {
                    $arRes = Array();
                    $arRes['ID'] = $this->mainSection + $id;
                    $arRes['IBLOCK_SECTION_ID'] = 0;
                    $arRes['NAME'] = "Основной раздел каталога";
                    $categories[] = $this->BuildCategory($arRes);
                }
            }
            return $categories;

	}
	
	protected function BuildCategory($arCategory)
	{
            return "
                    <category id=\"" . $this->PrepareValue($arCategory["ID"]) . "\""
                    . ( intval($arCategory["IBLOCK_SECTION_ID"] ) > 0 ?
                            " parentId=\"" . $this->PrepareValue($arCategory["IBLOCK_SECTION_ID"]) . "\""
                            :"")
                    . ">"
                    . $this->PrepareValue($arCategory["NAME"])
                    . "</category>";
			
	}
	
	protected function GetOffers()
	{
            $offers = Array();
            foreach ($this->iblocks as $key => $id) 
            {

                    $iblock['IBLOCK_DB'] = CIBlock::GetByID($id)->Fetch();
                    $iblockOffer = CCatalogSKU::GetInfoByProductIBlock($id);


                    $arSelect = Array (
                                    "ID",
                                    "LID",
                                    "IBLOCK_ID",
                                    "IBLOCK_SECTION_ID",
                                    "ACTIVE",
                                    "ACTIVE_FROM",
                                    "ACTIVE_TO",
                                    "NAME",
                                    "DETAIL_PICTURE",
                                    "DETAIL_TEXT",
                                    "DETAIL_PICTURE",
                                    "LANG_DIR",
                                    "DETAIL_PAGE_URL"
                            );
                    
                    if (isset($this->articleProperties[$id]))
                        $arSelect[] =  "PROPERTY_" . $this->articleProperties[$id];
                            

                    $filter = Array (
                                    "IBLOCK_ID" => $id,
                                    "ACTIVE_DATE" => "Y",
                                    "ACTIVE" => "Y",
                                    "INCLUDE_SUBSECTIONS" => "Y"
                            );

                    $dbResProducts = CIBlockElement::GetList(array(), $filter, false, false, $arSelect);
                    while ($product = $dbResProducts->GetNextElement()) {

                            $product = $product->GetFields();

                            $categoriesString = "";


                            $existOffer = false;
                            if (!empty($iblockOffer['IBLOCK_ID'])) {
                                    $arFilterOffer = Array (
                                                    'IBLOCK_ID' => $iblockOffer['IBLOCK_ID'],
                                                    'PROPERTY_'.$iblockOffer['SKU_PROPERTY_ID'] => $product["ID"]
                                            );
                                    $arSelectOffer = Array (
                                                    'ID',
                                                    "NAME",
                                                    "DETAIL_TEXT",
                                                    "DETAIL_PAGE_URL",
                                                    "DETAIL_PICTURE"
                                            );
                                    if (isset($this->articleProperties[$id]))
                                        $arSelectOffer[] =  "PROPERTY_" . $this->articleProperties[$id];

                                    $rsOffers = CIBlockElement::GetList(array(), $arFilterOffer, false, false, $arSelectOffer);
                                    while ($arOffer = $rsOffers->GetNext()) {

                                            $dbResCategories = CIBlockElement::GetElementGroups($arOffer['ID'], true);
                                            while ($arResCategory = $dbResCategories->Fetch()) {
                                                    $categoriesString .= "<categoryId>" . $arResCategory["ID"] . "</categoryId>\n";
                                            }
                                            if ($categoriesString == '')
                                                $categoriesString .= "<categoryId>" . ($this->mainSection + $id) . "</categoryId>\n";
                                            $offer = CCatalogProduct::GetByID($arOffer['ID']);
                                            $arOffer['QUANTITY'] = $offer["QUANTITY"];

                                            $arOffer['PRODUCT_ID'] = $product["ID"];
                                            $arOffer['DETAIL_PAGE_URL'] = $product["DETAIL_PAGE_URL"];
                                            $arOffer['DETAIL_PICTURE'] = $product["DETAIL_PICTURE"];
                                            $arOffer['PREVIEW_PICTURE'] = $product["PREVIEW_PICTURE"];
                                            $arOffer['PRODUCT_NAME'] = $product["NAME"];
                                            if (isset($this->articleProperties[$id]))
                                                $arOffer['ARTICLE'] = $product["PROPERTY_" . $this->articleProperties[$id] . "_VALUE"];

                                            $dbPrice = GetCatalogProductPrice($arOffer["ID"],1);
                                            $arOffer['PRICE'] = $dbPrice['PRICE'];


                                            $offers[] = $this->BuildOffer($arOffer, $categoriesString, $iblock);
                                            $existOffer = true;
                                    }
                            }
                            if (!$existOffer) {
                                    $dbResCategories = CIBlockElement::GetElementGroups($product["ID"], true);
                                    while ($arResCategory = $dbResCategories->Fetch()) {
                                            $categoriesString .= "<categoryId>" . $arResCategory["ID"] . "</categoryId>\n";
                                    }
                                    if ($categoriesString == '')
                                        $categoriesString .= "<categoryId>" . ($this->mainSection + $id) . "</categoryId>\n";

                                    $offer = CCatalogProduct::GetByID($product['ID']);
                                    $product['QUANTITY'] = $offer["QUANTITY"];

                                    $product['PRODUCT_ID'] = $product["ID"];
                                    $product['PRODUCT_NAME'] = $product["NAME"];
                                    if (isset($this->articleProperties[$id]))
                                        $product['ARTICLE'] = $product["PROPERTY_" . $this->articleProperties[$id] . "_VALUE"];

                                    $dbPrice = GetCatalogProductPrice($product["ID"],1);
                                    $product['PRICE'] = $dbPrice['PRICE'];

                                    $offers[] = $this->BuildOffer($product, $categoriesString, $iblock);
                            }
                    }
            }
            return $offers;
	}
	
	
	protected function BuildOffer($arOffer, $categoriesString, $iblock)
	{
            $offer = "";
            $offer .= "<offer id=\"" .$this->PrepareValue($arOffer["ID"]) . "\" ".
                    "productId=\"" . $this->PrepareValue($arOffer["PRODUCT_ID"]) . "\" ".
                    "quantity=\"" . $this->PrepareValue(DoubleVal($arOffer['QUANTITY'])) . "\">\n";
            $offer .= "<url>http://" . $this->PrepareValue($iblock['IBLOCK_DB']['SERVER_NAME']) . $this->PrepareValue($arOffer['DETAIL_PAGE_URL']) . "</url>\n";

            $offer .= "<price>" . $this->PrepareValue($arOffer['PRICE']) . "</price>\n";
            $offer .= $categoriesString;

            $detailPicture = intval($arOffer["DETAIL_PICTURE"]);
            $previewPicture = intval($arOffer["PREVIEW_PICTURE"]);

            if ($detailPicture > 0 || $previewPicture > 0)
            {
                    $picture = $detailPicture;
                    if ($picture <= 0) {
                            $picture = $previewPicture;
                    }

                    if ($arFile = CFile::GetFileArray($picture))
                    {
                            if(substr($arFile["SRC"], 0, 1) == "/")
                                    $strFile = "http://" . $this->PrepareValue($iblock['IBLOCK_DB']['SERVER_NAME']) . implode("/", array_map("rawurlencode", explode("/", $arFile["SRC"])));
                            elseif(preg_match("/^(http|https):\\/\\/(.*?)\\/(.*)\$/", $arFile["SRC"], $match))
                                    $strFile = "http://" . $this->PrepareValue($match[2]) . '/' . implode("/", array_map("rawurlencode", explode("/", $this->PrepareValue($match[3]))));
                            else
                                    $strFile = $arFile["SRC"];
                            $offer .= "<picture>" . $this->PrepareValue($strFile) . "</picture>\n";
                    }
            }

            $offer .= "<name>" . $this->PrepareValue($arOffer["NAME"]) . "</name>\n";

            $offer .= "<xmlId>" . $this->PrepareValue($arOffer["EXTERNAL_ID"]) . "</xmlId>\n";
            $offer .= "<productName>" . $this->PrepareValue($arOffer["PRODUCT_NAME"]) . "</productName>\n";
            if (isset($arOffer["ARTICLE"]))
                $offer .= "<article>" . $this->PrepareValue($arOffer["ARTICLE"]) . "</article>\n";

            $offer.= "</offer>\n";
            return $offer;
	}
	
	
}