<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Catalog
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Product View block
 *
 * @category   Mage
 * @package    Mage_Catalog
 * @module     Catalog
 */
class Mage_Catalog_Block_Product_View extends Mage_Catalog_Block_Product_Abstract
{
    /**
     * Add meta information from product to head block
     *
     * @return Mage_Catalog_Block_Product_View
     */
    protected function _prepareLayout()
    {
        $this->getLayout()->createBlock('catalog/breadcrumbs');
        $headBlock = $this->getLayout()->getBlock('head');
        if ($headBlock) {
            $product = $this->getProduct();
            $title = $product->getMetaTitle();
            if ($title) {
                $headBlock->setTitle($title);
            }
            $keyword = $product->getMetaKeyword();
            $currentCategory = Mage::registry('current_category');
            if ($keyword) {
                $headBlock->setKeywords($keyword);
            } elseif($currentCategory) {
                $headBlock->setKeywords($product->getName());
            }
            $description = $product->getMetaDescription();
            if ($description) {
                $headBlock->setDescription( ($description) );
            } else {
                $headBlock->setDescription($product->getDescription());
            }
            if ($this->helper('catalog/product')->canUseCanonicalTag()) {
                $params = array('_ignore_category'=>true);
                $headBlock->addLinkRel('canonical', $product->getUrlModel()->getUrl($product, $params));
            }
        }

        return parent::_prepareLayout();
    }

    /**
     * Retrieve current product model
     *
     * @return Mage_Catalog_Model_Product
     */
    public function getProduct()
    {
        if (!Mage::registry('product') && $this->getProductId()) {
            $product = Mage::getModel('catalog/product')->load($this->getProductId());
            Mage::register('product', $product);
        }
        return Mage::registry('product');
    }

    /**
     * Check if product can be emailed to friend
     *
     * @return bool
     */
    public function canEmailToFriend()
    {
        $sendToFriendModel = Mage::registry('send_to_friend_model');
        return $sendToFriendModel && $sendToFriendModel->canEmailToFriend();
    }

    /**
     * Retrieve url for direct adding product to cart
     *
     * @param Mage_Catalog_Model_Product $product
     * @param array $additional
     * @return string
     */
    public function getAddToCartUrl($product, $additional = array())
    {
        if ($this->getRequest()->getParam('wishlist_next')){
            $additional['wishlist_next'] = 1;
        }

        return $this->helper('checkout/cart')->getAddUrl($product, $additional);
    }

    /**
     * Get JSON encripted configuration array which can be used for JS dynamic
     * price calculation depending on product options
     *
     * @return string
     */
    public function getJsonConfig()
    {
        $config = array();
        if (!$this->hasOptions()) {
            return Mage::helper('core')->jsonEncode($config);
        }

        $_request = Mage::getSingleton('tax/calculation')->getRateRequest(false, false, false);
        $_request->setProductClassId($this->getProduct()->getTaxClassId());
        $defaultTax = Mage::getSingleton('tax/calculation')->getRate($_request);

        $_request = Mage::getSingleton('tax/calculation')->getRateRequest();
        $_request->setProductClassId($this->getProduct()->getTaxClassId());
        $currentTax = Mage::getSingleton('tax/calculation')->getRate($_request);

        $_regularPrice = $this->getProduct()->getPrice();
        $_finalPrice = $this->getProduct()->getFinalPrice();
        $_priceInclTax = Mage::helper('tax')->getPrice($this->getProduct(), $_finalPrice, true);
        $_priceExclTax = Mage::helper('tax')->getPrice($this->getProduct(), $_finalPrice);

        $config = array(
            'productId'           => $this->getProduct()->getId(),
            'priceFormat'         => Mage::app()->getLocale()->getJsPriceFormat(),
            'includeTax'          => Mage::helper('tax')->priceIncludesTax() ? 'true' : 'false',
            'showIncludeTax'      => Mage::helper('tax')->displayPriceIncludingTax(),
            'showBothPrices'      => Mage::helper('tax')->displayBothPrices(),
            'productPrice'        => Mage::helper('core')->currency($_finalPrice, false, false),
            'productOldPrice'     => Mage::helper('core')->currency($_regularPrice, false, false),
            'skipCalculate'       => ($_priceExclTax != $_priceInclTax ? 0 : 1),
            'defaultTax'          => $defaultTax,
            'currentTax'          => $currentTax,
            'idSuffix'            => '_clone',
            'oldPlusDisposition'  => 0,
            'plusDisposition'     => 0,
            'oldMinusDisposition' => 0,
            'minusDisposition'    => 0,
        );

        $responseObject = new Varien_Object();
        Mage::dispatchEvent('catalog_product_view_config', array('response_object'=>$responseObject));
        if (is_array($responseObject->getAdditionalOptions())) {
            foreach ($responseObject->getAdditionalOptions() as $option=>$value) {
                $config[$option] = $value;
            }
        }

        return Mage::helper('core')->jsonEncode($config);
    }

    /**
     * Return true if product has options
     *
     * @return bool
     */
    public function hasOptions()
    {
        if ($this->getProduct()->getTypeInstance(true)->hasOptions($this->getProduct())) {
            return true;
        }
        return false;
    }

    /**
     * Check if product has required options
     *
     * @return bool
     */
    public function hasRequiredOptions()
    {
        return $this->getProduct()->getTypeInstance(true)->hasRequiredOptions($this->getProduct());
    }
}