<?php
/**
 * Data class to mark notices as bookmarks
 *
 * PHP version 5
 *
 * @category Data
 * @package  StatusNet
 * @author   Evan Prodromou <evan@status.net>
 * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
 * @link     http://status.net/
 *
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2009, StatusNet, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.     See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

if (!defined('GNUSOCIAL')) { exit(1); }

/**
 * For storing the fact that a notice is a bookmark
 *
 * @category Bookmark
 * @package  StatusNet
 * @author   Evan Prodromou <evan@status.net>
 * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
 * @link     http://status.net/
 *
 * @see      DB_DataObject
 */
class Bookmark extends Managed_DataObject
{
    public $__table = 'bookmark'; // table name
    public $id;          // char(36) primary_key not_null
    public $profile_id;  // int(4) not_null
    public $url;         // varchar(191) not_null   not 255 because utf8mb4 takes more space
    public $title;       // varchar(191)   not 255 because utf8mb4 takes more space
    public $uri;         // varchar(191)   not 255 because utf8mb4 takes more space
    public $description; // text
    public $created;     // datetime

    public static function schemaDef()
    {
        return array(
            'fields' => array(
                'id' => array('type' => 'char',
                            'length' => 36,
                            'not null' => true),
                'profile_id' => array('type' => 'int', 'not null' => true),
                'uri' => array('type' => 'varchar',
                            'length' => 191,
                            'not null' => true),
                'url' => array('type' => 'varchar',
                            'length' => 191,
                            'not null' => true),
                'title' => array('type' => 'varchar', 'length' => 191),
                'description' => array('type' => 'text'),
                'created' => array('type' => 'datetime', 'not null' => true),
            ),
            'primary key' => array('uri'),
            'unique keys' => array(
                'bookmark_id_key' => array('id'),
            ),
            'foreign keys' => array(
                'bookmark_profile_id_fkey' => array('profile', array('profile_id' => 'id')),
                'bookmark_uri_fkey' => array('notice', array('uri' => 'uri')),
            ),
            'indexes' => array('bookmark_created_idx' => array('created'),
                            'bookmark_url_idx' => array('url'),
                            'bookmark_profile_id_idx' => array('profile_id'),
            ),
        );
    }

    /**
     * Get a bookmark based on a notice
     *
     * @param   Notice              $stored Notice activity which represents the Bookmark
     *
     * @return  Bookmark            The found bookmark object.
     * @throws  NoResultException   When you don't find it after all.
     */
    static public function fromStored(Notice $stored)
    {
        return self::getByPK(array('uri' => $stored->getUri()));
    }

    public function getDescription()
    {
        return $this->description;
    }

    public function getTitle()
    {
        return $this->title;
    }

    public function getUrl()
    {
        if (empty($this->url)) {
            throw new InvalidUrlException($this->url);
        }
        return $this->url;
    }

    /**
     * Get the bookmark that a user made for an URL
     *
     * @param Profile $profile Profile to check for
     * @param string  $url     URL to check for
     *
     * @return Bookmark bookmark found or null
     */
    static function getByURL(Profile $profile, $url)
    {
        $nb = new Bookmark();

        $nb->profile_id = $profile->getID();
        $nb->url        = $url;

        if (!$nb->find(true)) {
            throw new NoResultException($nb);
        }

        return $nb;
    }

    /**
     * Store a Bookmark object
     *
     * @param Profile $profile     To save the bookmark for
     * @param string  $title       Title of the bookmark
     * @param string  $url         URL of the bookmark
     * @param string  $description Description of the bookmark
     *
     * @return Bookmark the Bookmark object
     */
    static function addNew(Notice $stored, $title, $url, $description)
    {
        if ($title === '' or is_null($title)) {
            throw new ClientException(_m('You must provide a non-empty title.'));
        }
        if (!common_valid_http_url($url)) {
            throw new ClientException(_m('Only web bookmarks can be posted (HTTP or HTTPS).'));
        }

        try {
            $object = self::getByURL($stored->getProfile(), $url);
            throw new ClientException(_m('You have already bookmarked this URL.'));
        } catch (NoResultException $e) {
            // Alright, so then we have to create it.
        }

        $nb = new Bookmark();

        $nb->id          = UUID::gen();
        $nb->uri         = $stored->uri;
        $nb->profile_id  = $stored->getProfile()->getID();
        $nb->title       = $title;
        $nb->url         = $url;
        $nb->description = $description;
        $nb->created     = $stored->created;

        $result = $nb->insert();
        if ($result === false) {
            throw new ServerException('Could not insert Bookmark into database!');
        }

        /*$hashtags = array();
        $taglinks = array();

        foreach ($tags as $tag) {
            $hashtags[] = '#'.$tag;
            $attrs      = array('href' => Notice_tag::url($tag),
                                'rel'  => $tag,
                                'class' => 'tag');
            $taglinks[] = XMLStringer::estring('a', $attrs, $tag);
        }*/

        return $nb;
    }

    /**
     * Save a new notice bookmark
     *
     * @param Profile $profile     To save the bookmark for
     * @param string  $title       Title of the bookmark
     * @param string  $url         URL of the bookmark
     * @param array   $rawtags     array of tags
     * @param string  $description Description of the bookmark
     * @param array   $options     Options for the Notice::saveNew()
     *
     * @return Notice saved notice
     */
    static function saveNew(Profile $profile, $title, $url, $rawtags, $description,
                            array $options=array())
    {
        if (!common_valid_http_url($url)) {
            throw new ClientException(_m('Only web bookmarks can be posted (HTTP or HTTPS).'));
        }

        try {
            $object = self::getByURL($profile, $url);
            return $object;
        } catch (NoResultException $e) {
            // Alright, so then we have to create it.
        }

        if (array_key_exists('uri', $options)) {
            $other = Bookmark::getKV('uri', $options['uri']);
            if (!empty($other)) {
                // TRANS: Client exception thrown when trying to save a new bookmark that already exists.
                throw new ClientException(_m('Bookmark already exists.'));
            }
        }

        $nb = new Bookmark();

        $nb->id          = UUID::gen();
        $nb->profile_id  = $profile->id;
        $nb->url         = $url;
        $nb->title       = $title;
        $nb->description = $description;

        if (array_key_exists('created', $options)) {
            $nb->created = $options['created'];
        } else {
            $nb->created = common_sql_now();
        }

        if (array_key_exists('uri', $options)) {
            $nb->uri = $options['uri'];
        } else {
            // FIXME: hacks to work around router bugs in
            // queue daemons

            $r = Router::get();

            $path = $r->build('showbookmark',
                              array('id' => $nb->id));

            if (empty($path)) {
                $nb->uri = common_path('bookmark/'.$nb->id, false, false);
            } else {
                $nb->uri = common_local_url('showbookmark',
                                            array('id' => $nb->id),
                                            null,
                                            null,
                                            false);
            }
        }

        $nb->insert();

        $tags    = array();
        $replies = array();

        // filter "for:nickname" tags

        foreach ($rawtags as $tag) {
            if (strtolower(mb_substr($tag, 0, 4)) == 'for:') {
                // skip if done by caller
                if (!array_key_exists('replies', $options)) {
                    $nickname = mb_substr($tag, 4);
                    $other    = common_relative_profile($profile,
                                                        $nickname);
                    if (!empty($other)) {
                        $replies[] = $other->getUri();
                    }
                }
            } else {
                $tags[] = common_canonical_tag($tag);
            }
        }

        $hashtags = array();
        $taglinks = array();

        foreach ($tags as $tag) {
            $hashtags[] = '#'.$tag;
            $attrs      = array('href' => Notice_tag::url($tag),
                                'rel'  => $tag,
                                'class' => 'tag');
            $taglinks[] = XMLStringer::estring('a', $attrs, $tag);
        }

        // Use user's preferences for short URLs, if possible

        try {
            $user = User::getKV('id', $profile->id);

            $shortUrl = File_redirection::makeShort($url,
                                                    empty($user) ? null : $user);
        } catch (Exception $e) {
            // Don't let this stop us.
            $shortUrl = $url;
        }

        // TRANS: Bookmark content.
        // TRANS: %1$s is a title, %2$s is a short URL, %3$s is the bookmark description,
	// TRANS: %4$s is space separated list of hash tags.
        $content = sprintf(_m('"%1$s" %2$s %3$s %4$s'),
                           $title,
                           $shortUrl,
                           $description,
                           implode(' ', $hashtags));

        // TRANS: Rendered bookmark content.
        // TRANS: %1$s is a URL, %2$s the bookmark title, %3$s is the bookmark description,
	// TRANS: %4$s is space separated list of hash tags.
        $rendered = sprintf(_m('<span class="xfolkentry">'.
                              '<a class="taggedlink" href="%1$s">%2$s</a> '.
                              '<span class="description">%3$s</span> '.
                              '<span class="meta">%4$s</span>'.
                              '</span>'),
                            htmlspecialchars($url),
                            htmlspecialchars($title),
                            htmlspecialchars($description),
                            implode(' ', $taglinks));

        $options = array_merge(array('urls' => array($url),
                                     'rendered' => $rendered,
                                     'tags' => $tags,
                                     'replies' => $replies,
                                     'object_type' => ActivityObject::BOOKMARK),
                               $options);

        $options['uri'] = $nb->uri;

        try {
            $saved = Notice::saveNew($profile->id,
                                     $content,
                                     array_key_exists('source', $options) ?
                                     $options['source'] : 'web',
                                     $options);
        } catch (Exception $e) {
            $nb->delete();
            throw $e;
        }

        if (empty($saved)) {
            $nb->delete();
        }

        return $saved;
    }
}