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<?php

/* --------------------------------------------------------------
   CategoryRepositoryWriter.php 2016-06-23
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2016 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * Class CategoryRepositoryWriter
 * 
 * This class provides methods for creating and updating specific category records in the database and is used in the category
 * repository among the classes for reading and deleting category records.
 *
 * @category   System
 * @package    Category
 * @subpackage Repositories
 */
class CategoryRepositoryWriter implements CategoryRepositoryWriterInterface
{
    /**
     * @var CI_DB_query_builder
     */
    protected $db;

    /**
     * @var string
     */
    protected $categoriesTable = 'categories';

    /**
     * @var LanguageProviderInterface $languageProvider
     */
    protected $languageProvider;


    /**
     * CategoryRepositoryWriter constructor.
     *
     * @param CI_DB_query_builder       $db Database connector.
     * @param LanguageProviderInterface $languageProvider
     */
    public function __construct(CI_DB_query_builder $db, LanguageProviderInterface $languageProvider)
    {
        $this->db               = $db;
        $this->languageProvider = $languageProvider;
    }


    /**
     * Inserts a category record into the database accordingly to the provided category object and returns the ID from
     * the saved entity.
     *
     * @param CategoryInterface $category The category to insert.
     *
     * @return int Returns the ID of the new category.
     *             
     * @throws UnexpectedValueException When no language id was found by the given language code.
     * @throws InvalidArgumentException
     */
    public function insert(CategoryInterface $category)
    {
        // Insert the category. 
        $categoryDataArray = $this->_parseCategoryData($category);

        $this->db->insert($this->categoriesTable, $categoryDataArray);

        $categoryId = $this->db->insert_id();

        // Insert the category description. 
        foreach($this->languageProvider->getCodes() as $languageCode)
        {
            $languageId = $this->languageProvider->getIdByCode($languageCode);

            $categoryDescriptionDataArray                  = $this->_parseCategoryDescriptionData($category, $languageCode);
            $categoryDescriptionDataArray['language_id']   = $languageId;
            $categoryDescriptionDataArray['categories_id'] = $categoryId;

            $this->db->insert('categories_description', $categoryDescriptionDataArray);
        }

        return $categoryId;
    }


    /**
     * Updates an existing category record accordingly to the provided category object.
     *
     * @param StoredCategoryInterface $category The category to update.
     *
     * @return CategoryRepositoryWriter Same instance for chained method calls.
     *                                  
     * @throws UnexpectedValueException When no language id was found by the given language code.
     * @throws InvalidArgumentException
     */
    public function update(StoredCategoryInterface $category)
    {
        // Update the category. 
        $categoryDataArray = $this->_parseCategoryData($category);
        $this->db->update($this->categoriesTable,
                          $categoryDataArray,
                          array('categories_id' => $category->getCategoryId()));

        // Update the category descriptions. 
        foreach($this->languageProvider->getCodes() as $languageCode)
        {
            $languageId = $this->languageProvider->getIdByCode($languageCode);

            $categoryDescriptionDataArray = array_merge(array(
                                                           'categories_id' => $category->getCategoryId(),
                                                           'language_id' => $languageId
                                                       ), $this->_parseCategoryDescriptionData($category, $languageCode));
            
            $this->db->replace('categories_description', $categoryDescriptionDataArray);
        }

        return $this;
    }


    protected function _parseCategoryData(CategoryInterface $category)
    {
        $categoryDataArray = array(
            'categories_image'     => $category->getImage(),
            'parent_id'            => $category->getParentId(),
            'categories_status'    => $category->isActive(),
            'sort_order'           => $category->getSortOrder(),
            'date_added'           => $category->getAddedDateTime()->format('Y-m-d H:i:s'),
            'last_modified'        => $category->getLastModifiedDateTime()->format('Y-m-d H:i:s'),
            'categories_icon'      => $category->getIcon()
        );

        return $categoryDataArray;
    }


    protected function _parseCategoryDescriptionData(CategoryInterface $category, LanguageCode $languageCode)
    {
        $categoryDescriptionDataArray = array(
            'categories_name'             => $category->getName($languageCode),
            'categories_heading_title'    => $category->getHeadingTitle($languageCode),
            'categories_description'      => $category->getDescription($languageCode),
            'categories_meta_title'       => $category->getMetaTitle($languageCode),
            'categories_meta_description' => $category->getMetaDescription($languageCode),
            'categories_meta_keywords'    => $category->getMetaKeywords($languageCode),
            'gm_alt_text'                 => $category->getImageAltText($languageCode),
            'gm_url_keywords'             => $category->getUrlKeywords($languageCode),
        );

        return $categoryDescriptionDataArray;
    }
}