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1<?php
2/**
3 *
4 * This file is part of the phpBB Forum Software package.
5 *
6 * @copyright (c) phpBB Limited <https://www.phpbb.com>
7 * @license GNU General Public License, version 2 (GPL-2.0)
8 *
9 * For full copyright and license information, please see
10 * the docs/CREDITS.txt file.
11 *
12 */
13
14namespace phpbb\feed;
15
16/**
17 * News feed
18 *
19 * This will give you {$this->num_items} first posts
20 * of all topics in the selected news forums.
21 */
22class news extends topic_base
23{
24    /**
25     * Returns the ids of the 'news forums'
26     * @return int[]
27     */
28    private function get_news_forums()
29    {
30        static $forum_ids;
31
32        // Matches acp/acp_board.php
33        $cache_name    = 'feed_news_forum_ids';
34
35        if (!isset($forum_ids) && ($forum_ids = $this->cache->get('_' . $cache_name)) === false)
36        {
37            $sql = 'SELECT forum_id
38                FROM ' . FORUMS_TABLE . '
39                WHERE ' . $this->db->sql_bit_and('forum_options', FORUM_OPTION_FEED_NEWS, '<> 0');
40            $result = $this->db->sql_query($sql);
41
42            $forum_ids = array();
43            while ($forum_id = (int) $this->db->sql_fetchfield('forum_id'))
44            {
45                $forum_ids[$forum_id] = $forum_id;
46            }
47            $this->db->sql_freeresult($result);
48
49            $this->cache->put('_' . $cache_name, $forum_ids);
50        }
51
52        return $forum_ids;
53    }
54
55    /**
56     * {@inheritdoc}
57     */
58    protected function get_sql()
59    {
60        // Determine forum ids
61        $in_fid_ary = array_intersect($this->get_news_forums(), $this->get_readable_forums());
62        if (empty($in_fid_ary))
63        {
64            return false;
65        }
66
67        $in_fid_ary = array_diff($in_fid_ary, $this->get_passworded_forums());
68        if (empty($in_fid_ary))
69        {
70            return false;
71        }
72
73        // We really have to get the post ids first!
74        $sql = 'SELECT topic_first_post_id, topic_time
75            FROM ' . TOPICS_TABLE . '
76            WHERE topic_moved_id = 0
77                AND ' . $this->content_visibility->get_forums_visibility_sql('topic', $in_fid_ary) . '
78            ORDER BY topic_time DESC';
79        $result = $this->db->sql_query_limit($sql, $this->num_items);
80
81        $post_ids = array();
82        while ($row = $this->db->sql_fetchrow($result))
83        {
84            $post_ids[] = (int) $row['topic_first_post_id'];
85        }
86        $this->db->sql_freeresult($result);
87
88        if (empty($post_ids))
89        {
90            return false;
91        }
92
93        parent::fetch_attachments($post_ids);
94
95        $this->sql = array(
96            'SELECT'    => 'f.forum_id, f.forum_name,
97                            t.topic_id, t.topic_title, t.topic_poster, t.topic_first_poster_name, t.topic_posts_approved, t.topic_posts_unapproved, t.topic_posts_softdeleted, t.topic_views, t.topic_time, t.topic_last_post_time,
98                            p.post_id, p.post_time, p.post_edit_time, p.post_text, p.bbcode_bitfield, p.bbcode_uid, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.post_attachment, t.topic_visibility',
99            'FROM'        => array(
100                TOPICS_TABLE    => 't',
101                POSTS_TABLE        => 'p',
102            ),
103            'LEFT_JOIN'    => array(
104                array(
105                    'FROM'    => array(FORUMS_TABLE => 'f'),
106                    'ON'    => 'p.forum_id = f.forum_id',
107                ),
108            ),
109            'WHERE'        => 'p.topic_id = t.topic_id
110                            AND ' . $this->db->sql_in_set('p.post_id', $post_ids),
111            'ORDER_BY'    => 'p.post_time DESC, p.post_id DESC',
112        );
113
114        return true;
115    }
116}