src/Biz/Article/Service/Impl/ArticleServiceImpl.php

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<?php

namespace Biz\Article\Service\Impl;

use AppBundle\Common\SimpleValidator;
use Biz\Article\ArticleException;
use Biz\Article\CategoryException;
use Biz\BaseService;
use Biz\Article\Dao\ArticleDao;
use AppBundle\Common\ArrayToolkit;
use Biz\Common\CommonException;
use Biz\System\Service\LogService;
use Biz\Article\Dao\ArticleLikeDao;
use Biz\Taxonomy\Service\TagService;
use Biz\Article\Service\ArticleService;
use Biz\User\UserException;
use Codeages\Biz\Framework\Event\Event;
use Biz\Article\Service\CategoryService;

class ArticleServiceImpl extends BaseService implements ArticleService
{
    public function getArticle($id)
    {
        return $this->getArticleDao()->get($id);
    }

    public function getArticlePrevious($currentArticleId)
    {
        $article = $this->getArticle($currentArticleId);

        if (empty($article)) {
            $this->createNewException(ArticleException::NOTFOUND());
        }

        $createdTime = $article['createdTime'];
        $categoryId = $article['categoryId'];
        $category = $this->getCategoryService()->getCategory($categoryId);

        if (empty($category)) {
            $this->createNewException(CategoryException::NOTFOUND_CATEGORY());
        }

        return $this->getArticleDao()->getPrevious($categoryId, $createdTime);
    }

    public function getArticleNext($currentArticleId)
    {
        $article = $this->getArticle($currentArticleId);

        if (empty($article)) {
            $this->createNewException(ArticleException::NOTFOUND());
        }

        $createdTime = $article['createdTime'];
        $categoryId = $article['categoryId'];
        $category = $this->getCategoryService()->getCategory($categoryId);

        if (empty($category)) {
            $this->createNewException(CategoryException::NOTFOUND_CATEGORY());
        }