<?php
/**
 * ownCloud - News
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Alessandro Cosentino <cosenal@gmail.com>
 * @author Bernhard Posselt <dev@bernhard-posselt.com>
 * @copyright Alessandro Cosentino 2012
 * @copyright Bernhard Posselt 2012, 2014
 */

namespace OCA\News\Db;

use \OCP\AppFramework\Db\Entity;


/**
 * @method integer getId()
 * @method void setId(integer $value)
 * @method string getGuid()
 * @method void setGuid(string $value)
 * @method string getGuidHash()
 * @method void setGuidHash(string $value)
 * @method string getUrl()
 * @method string getTitle()
 * @method string getAuthor()
 * @method string getRtl()
 * @method string getFingerprint()
 * @method integer getPubDate()
 * @method void setPubDate(integer $value)
 * @method string getBody()
 * @method string getEnclosureMime()
 * @method void setEnclosureMime(string $value)
 * @method string getEnclosureLink()
 * @method void setEnclosureLink(string $value)
 * @method integer getFeedId()
 * @method void setFeedId(integer $value)
 * @method integer getStatus()
 * @method void setStatus(integer $value)
 * @method void setRtl(boolean $value)
 * @method integer getLastModified()
 * @method void setLastModified(integer $value)
 * @method void setFingerprint(string $value)
 * @method void setSearchIndex(string $value)
 */
class Item extends Entity implements IAPI, \JsonSerializable {

    use EntityJSONSerializer;

    protected $guidHash;
    protected $guid;
    protected $url;
    protected $title;
    protected $author;
    protected $pubDate;
    protected $body;
    protected $enclosureMime;
    protected $enclosureLink;
    protected $feedId;
    protected $status = 0;
    protected $lastModified;
    protected $searchIndex;
    protected $rtl;
    protected $fingerprint;

    public function __construct(){
        $this->addType('pubDate', 'integer');
        $this->addType('feedId', 'integer');
        $this->addType('status', 'integer');
        $this->addType('lastModified', 'integer');
        $this->addType('rtl', 'boolean');
    }


    public function setRead() {
        $this->markFieldUpdated('status');
        $this->status &= ~StatusFlag::UNREAD;
    }

    public function isRead() {
        return !(($this->status & StatusFlag::UNREAD) === StatusFlag::UNREAD);
    }

    public function setUnread() {
        $this->markFieldUpdated('status');
        $this->status |= StatusFlag::UNREAD;
    }

    public function isUnread() {
        return !$this->isRead();
    }

    public function setStarred() {
        $this->markFieldUpdated('status');
        $this->status |= StatusFlag::STARRED;
    }

    public function isStarred() {
        return ($this->status & StatusFlag::STARRED) === StatusFlag::STARRED;
    }

    public function setUnstarred() {
        $this->markFieldUpdated('status');
        $this->status &= ~StatusFlag::STARRED;
    }

    public function isUnstarred() {
        return !$this->isStarred();
    }

    /**
     * Turns entitie attributes into an array
     */
    public function jsonSerialize() {
        return [
            'id' => $this->getId(),
            'guid' => $this->getGuid(),
            'guidHash' => $this->getGuidHash(),
            'url' => $this->getUrl(),
            'title' => $this->getTitle(),
            'author' => $this->getAuthor(),
            'pubDate' => $this->getPubDate(),
            'body' => $this->getBody(),
            'enclosureMime' => $this->getEnclosureMime(),
            'enclosureLink' => $this->getEnclosureLink(),
            'feedId' => $this->getFeedId(),
            'unread' => $this->isUnread(),
            'starred' => $this->isStarred(),
            'lastModified' => $this->getLastModified(),
            'rtl' => $this->getRtl(),
            'intro' => $this->getIntro(),
            'fingerprint' => $this->getFingerprint()
        ];
    }

    public function toAPI() {
        return [
            'id' => $this->getId(),
            'guid' => $this->getGuid(),
            'guidHash' => $this->getGuidHash(),
            'url' => $this->getUrl(),
            'title' => $this->getTitle(),
            'author' => $this->getAuthor(),
            'pubDate' => $this->getPubDate(),
            'body' => $this->getBody(),
            'enclosureMime' => $this->getEnclosureMime(),
            'enclosureLink' => $this->getEnclosureLink(),
            'feedId' => $this->getFeedId(),
            'unread' => $this->isUnread(),
            'starred' => $this->isStarred(),
            'lastModified' => $this->getLastModified(),
            'rtl' => $this->getRtl(),
            'fingerprint' => $this->getFingerprint()
        ];
    }


    public function toExport($feeds) {
        return [
            'guid' => $this->getGuid(),
            'url' => $this->getUrl(),
            'title' => $this->getTitle(),
            'author' => $this->getAuthor(),
            'pubDate' => $this->getPubDate(),
            'body' => $this->getBody(),
            'enclosureMime' => $this->getEnclosureMime(),
            'enclosureLink' => $this->getEnclosureLink(),
            'unread' => $this->isUnread(),
            'starred' => $this->isStarred(),
            'feedLink' => $feeds['feed'. $this->getFeedId()]->getLink(),
            'rtl' => $this->getRtl()
        ];
    }


    public function getIntro() {
        return strip_tags($this->getBody());
    }

    public static function fromImport($import) {
        $item = new static();
        $item->setGuid($import['guid']);
        $item->setGuidHash($import['guid']);
        $item->setUrl($import['url']);
        $item->setTitle($import['title']);
        $item->setAuthor($import['author']);
        $item->setPubDate($import['pubDate']);
        $item->setBody($import['body']);
        $item->setEnclosureMime($import['enclosureMime']);
        $item->setEnclosureLink($import['enclosureLink']);
        $item->setRtl($import['rtl']);
        if($import['unread']) {
            $item->setUnread();
        } else {
            $item->setRead();
        }
        if($import['starred']) {
            $item->setStarred();
        } else {
            $item->setUnstarred();
        }

        return $item;
    }


    public function setAuthor($name) {
        parent::setAuthor(strip_tags($name));
    }


    public function setTitle($title) {
        parent::setTitle(strip_tags($title));
    }

    public function generateSearchIndex() {
        $this->setSearchIndex(
            mb_strtolower(
                html_entity_decode(strip_tags($this->getBody())) .
                html_entity_decode($this->getAuthor()) .
                html_entity_decode($this->getTitle()) .
                $this->getUrl(),
                'UTF-8'
            )
        );
        $this->setFingerprint($this->computeFingerprint());
    }

    private function computeFingerprint() {
        return md5($this->getTitle() . $this->getUrl() . $this->getBody() .
                   $this->getEnclosureLink());
    }

    public function setUrl($url) {
        $url = trim($url);
        if(strpos($url, 'http') === 0 || strpos($url, 'magnet') === 0) {
            parent::setUrl($url);
        }
    }


    public function setBody($body) {
        // FIXME: this should not happen if the target="_blank" is already
        // on the link
        parent::setBody(str_replace(
            '<a', '<a target="_blank" rel="noreferrer"', $body
        ));
    }

}