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[feature/soft-delete] Add get_visibility_sql_forums based on global

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The resulting query is 4-times faster, as the forum_id IN () arrays are
smaller and we need less AND/OR to build the hole query. The main difference
between those two functions is, that this one takes an array of included ids and
the _global one takes an array of excluded ids.

PHPBB3-9657
This commit is contained in:
Joas Schilling 2012-08-30 18:07:00 +02:00
parent df83f22b71
commit 1c043254c0
2 changed files with 50 additions and 7 deletions
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9
phpBB/feed.php
View file

@ -751,16 +751,11 @@ class phpbb_feed_overall extends phpbb_feed_post_base
return false;
}
// m_approve forums
$fid_m_approve = $this->get_moderator_approve_forums();
$sql_m_approve = (!empty($fid_m_approve)) ? 'OR ' . $db->sql_in_set('forum_id', $fid_m_approve) : '';
// Determine topics with recent activity
$sql = 'SELECT topic_id, topic_last_post_time
FROM ' . TOPICS_TABLE . '
WHERE ' . $db->sql_in_set('forum_id', $forum_ids) . '
AND topic_moved_id = 0
AND ' . phpbb_content_visibility::get_visibility_sql_global('topic') . '
WHERE topic_moved_id = 0
AND ' . phpbb_content_visibility::get_visibility_sql_forums('topic', $forum_ids) . '
ORDER BY topic_last_post_time DESC';
$result = $db->sql_query_limit($sql, $this->num_items);

48
phpBB/includes/content_visibility.php
View file

@ -69,6 +69,54 @@ class phpbb_content_visibility
return $clause;
}
/**
* Fetch visibility SQL for a set of forums
* @param $mode string - either "topic" or "post"
* @param $forum_ids - int array -
* @param $table_alias string - Table alias to prefix in SQL queries
* @return string with the appropriate combination SQL logic for topic/post_visibility
*/
static public function get_visibility_sql_forums($mode, $forum_ids = array(), $table_alias = '')
{
global $auth, $db, $user;
// users can always see approved posts
$where_sql = "($table_alias{$mode}_visibility = " . ITEM_APPROVED;
// in set notation: {approve_forums} = {m_approve} - {exclude_forums}
$approve_forums = array_intersect($forum_ids, array_keys($auth->acl_getf('m_approve', true)));
if (sizeof($approve_forums))
{
// users can view unapproved topics in certain forums. specify them.
$where_sql .= " OR ($table_alias{$mode}_visibility = " . ITEM_UNAPPROVED . '
AND ' . $db->sql_in_set($table_alias . 'forum_id', $approve_forums) . ')';
}
// this is exactly the same logic as for approve forums, above
$restore_forums = array_intersect($forum_ids, array_keys($auth->acl_getf('m_restore', true)));
if (sizeof($restore_forums))
{
$where_sql .= " OR ($table_alias{$mode}_visibility = " . ITEM_DELETED . '
AND ' . $db->sql_in_set($table_alias . 'forum_id', $restore_forums) . ')';
}
// we also allow the user to view deleted posts he himself made
$user_restore_forums = array_diff(array_intersect($forum_ids, array_keys($auth->acl_getf('f_restore', true))), $restore_forums);
if (sizeof($user_restore_forums) && !sizeof($restore_forums))
{
$poster_column = ($mode == 'topic') ? 'topic_poster' : 'poster_id';
// specify the poster ID, the visibility type, and the forums we're interested in
$where_sql .= " OR ($table_alias$poster_column = " . $user->data['user_id'] . "
AND $table_alias{$mode}_visibility = " . ITEM_DELETED . "
AND " . $db->sql_in_set($table_alias . 'forum_id', $user_restore_forums) . ')';
}
$where_sql .= ')';
return $where_sql;
}
/**
* Fetch visibility SQL for all forums on the board.
* @param $mode string - either "topic" or "post"