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<?php
/**
 *
 * This file is part of the phpBB Forum Software package.
 *
 * @copyright (c) phpBB Limited <https://www.phpbb.com>
 * @license GNU General Public License, version 2 (GPL-2.0)
 *
 * For full copyright and license information, please see
 * the docs/CREDITS.txt file.
 *
 */
namespace phpbb\feed;
use phpbb\feed\exception\no_feed_exception;
use phpbb\feed\exception\no_forum_exception;
use phpbb\feed\exception\unauthorized_forum_exception;
/**
 * Forum feed
 *
 * This will give you the last {$this->num_items} posts made
 * within a specific forum.
 */
class forum extends post_base
{
    protected $forum_id        = 0;
    protected $forum_data    = array();
    /**
     * Set the Forum ID
     *
     * @param int    $forum_id            Forum ID
     * @return    \phpbb\feed\forum
     */
    public function set_forum_id($forum_id)
    {
        $this->forum_id = (int) $forum_id;
        return $this;
    }
    /**
     * {@inheritdoc}
     */
    public function open()
    {
        // Check if forum exists
        $sql = 'SELECT forum_id, forum_name, forum_password, forum_type, forum_options
            FROM ' . FORUMS_TABLE . '
            WHERE forum_id = ' . $this->forum_id;
        $result = $this->db->sql_query($sql);
        $this->forum_data = $this->db->sql_fetchrow($result);
        $this->db->sql_freeresult($result);
        if (empty($this->forum_data))
        {
            throw new no_forum_exception($this->forum_id);
        }
        // Forum needs to be postable
        if ($this->forum_data['forum_type'] != FORUM_POST)
        {
            throw new no_feed_exception();
        }
        // Make sure forum is not excluded from feed
        if (phpbb_optionget(FORUM_OPTION_FEED_EXCLUDE, $this->forum_data['forum_options']))
        {
            throw new no_feed_exception();
        }
        // Make sure we can read this forum
        if (!$this->auth->acl_get('f_read', $this->forum_id))
        {
            if ($this->user->data['user_id'] != ANONYMOUS)
            {
                send_status_line(403, 'Forbidden');
            }
            else
            {
                send_status_line(401, 'Unauthorized');
            }
            throw new unauthorized_forum_exception($this->forum_id);
        }
        // Make sure forum is not passworded or user is authed
        if ($this->forum_data['forum_password'])
        {
            $forum_ids_passworded = $this->get_passworded_forums();
            if (isset($forum_ids_passworded[$this->forum_id]))
            {
                if ($this->user->data['user_id'] != ANONYMOUS)
                {
                    send_status_line(403, 'Forbidden');
                }
                else
                {
                    send_status_line(401, 'Unauthorized');
                }
                throw new unauthorized_forum_exception($this->forum_id);
            }
            unset($forum_ids_passworded);
        }
        parent::open();
    }
    /**
     * {@inheritdoc}
     */
    protected function get_sql()
    {
        // Determine topics with recent activity
        $sql = 'SELECT topic_id, topic_last_post_time
            FROM ' . TOPICS_TABLE . '
            WHERE forum_id = ' . $this->forum_id . '
                AND topic_moved_id = 0
                AND ' . $this->content_visibility->get_visibility_sql('topic', $this->forum_id) . '
            ORDER BY topic_last_post_time DESC, topic_last_post_id DESC';
        $result = $this->db->sql_query_limit($sql, $this->num_items);
        $topic_ids = array();
        $min_post_time = 0;
        while ($row = $this->db->sql_fetchrow())
        {
            $topic_ids[] = (int) $row['topic_id'];
            $min_post_time = (int) $row['topic_last_post_time'];
        }
        $this->db->sql_freeresult($result);
        if (empty($topic_ids))
        {
            return false;
        }
        parent::fetch_attachments(array(), $topic_ids);
        $this->sql = array(
            'SELECT'    =>    'p.post_id, p.topic_id, p.post_time, p.post_edit_time, p.post_visibility, p.post_subject, p.post_text, p.bbcode_bitfield, p.bbcode_uid, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.post_attachment, ' .
                'u.username, u.user_id',
            'FROM'        => array(
                POSTS_TABLE        => 'p',
                USERS_TABLE        => 'u',
            ),
            'WHERE'        => $this->db->sql_in_set('p.topic_id', $topic_ids) . '
                            AND ' . $this->content_visibility->get_visibility_sql('post', $this->forum_id, 'p.') . '
                            AND p.post_time >= ' . $min_post_time . '
                            AND p.poster_id = u.user_id',
            'ORDER_BY'    => 'p.post_time DESC, p.post_id DESC',
        );
        return true;
    }
    /**
     * {@inheritdoc}
     */
    public function adjust_item(&$item_row, &$row)
    {
        parent::adjust_item($item_row, $row);
        $item_row['title'] = (isset($row['forum_name']) && $row['forum_name'] !== '') ? $row['forum_name'] . ' ' . $this->separator . ' ' . $item_row['title'] : $item_row['title'];
        $item_row['forum_id'] = $this->forum_id;
    }
    /**
     * {@inheritdoc}
     */
    public function get_item()
    {
        return ($row = parent::get_item()) ? array_merge($this->forum_data, $row) : $row;
    }
}