* @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\search;
/**
* Fulltext search for MySQL
*/
class fulltext_mysql extends \phpbb\search\base
{
/**
* Associative array holding index stats
* @var array
*/
protected $stats = array();
/**
* Holds the words entered by user, obtained by splitting the entered query on whitespace
* @var array
*/
protected $split_words = array();
/**
* Config object
* @var \phpbb\config\config
*/
protected $config;
/**
* Database connection
* @var \phpbb\db\driver\driver_interface
*/
protected $db;
/**
* phpBB event dispatcher object
* @var \phpbb\event\dispatcher_interface
*/
protected $phpbb_dispatcher;
/**
* User object
* @var \phpbb\user
*/
protected $user;
/**
* Associative array stores the min and max word length to be searched
* @var array
*/
protected $word_length = array();
/**
* Contains tidied search query.
* Operators are prefixed in search query and common words excluded
* @var string
*/
protected $search_query;
/**
* Contains common words.
* Common words are words with length less/more than min/max length
* @var array
*/
protected $common_words = array();
/**
* Constructor
* Creates a new \phpbb\search\fulltext_mysql, which is used as a search backend
*
* @param string|bool $error Any error that occurs is passed on through this reference variable otherwise false
* @param string $phpbb_root_path Relative path to phpBB root
* @param string $phpEx PHP file extension
* @param \phpbb\auth\auth $auth Auth object
* @param \phpbb\config\config $config Config object
* @param \phpbb\db\driver\driver_interface Database object
* @param \phpbb\user $user User object
* @param \phpbb\event\dispatcher_interface $phpbb_dispatcher Event dispatcher object
*/
public function __construct(&$error, $phpbb_root_path, $phpEx, $auth, $config, $db, $user, $phpbb_dispatcher)
{
$this->config = $config;
$this->db = $db;
$this->phpbb_dispatcher = $phpbb_dispatcher;
$this->user = $user;
$this->word_length = array('min' => $this->config['fulltext_mysql_min_word_len'], 'max' => $this->config['fulltext_mysql_max_word_len']);
/**
* Load the UTF tools
*/
if (!function_exists('utf8_strlen'))
{
include($phpbb_root_path . 'includes/utf/utf_tools.' . $phpEx);
}
$error = false;
}
/**
* Returns the name of this search backend to be displayed to administrators
*
* @return string Name
*/
public function get_name()
{
return 'MySQL Fulltext';
}
/**
* Returns the search_query
*
* @return string search query
*/
public function get_search_query()
{
return $this->search_query;
}
/**
* Returns the common_words array
*
* @return array common words that are ignored by search backend
*/
public function get_common_words()
{
return $this->common_words;
}
/**
* Returns the word_length array
*
* @return array min and max word length for searching
*/
public function get_word_length()
{
return $this->word_length;
}
/**
* Checks for correct MySQL version and stores min/max word length in the config
*
* @return string|bool Language key of the error/incompatiblity occurred
*/
public function init()
{
if ($this->db->get_sql_layer() != 'mysql4' && $this->db->get_sql_layer() != 'mysqli')
{
return $this->user->lang['FULLTEXT_MYSQL_INCOMPATIBLE_DATABASE'];
}
$result = $this->db->sql_query('SHOW TABLE STATUS LIKE \'' . POSTS_TABLE . '\'');
$info = $this->db->sql_fetchrow($result);
$this->db->sql_freeresult($result);
$engine = '';
if (isset($info['Engine']))
{
$engine = $info['Engine'];
}
else if (isset($info['Type']))
{
$engine = $info['Type'];
}
$fulltext_supported =
$engine === 'MyISAM' ||
// FULLTEXT is supported on InnoDB since MySQL 5.6.4 according to
// http://dev.mysql.com/doc/refman/5.6/en/innodb-storage-engine.html
// We also require https://bugs.mysql.com/bug.php?id=67004 to be
// fixed for proper overall operation. Hence we require 5.6.8.
$engine === 'InnoDB' &&
phpbb_version_compare($this->db->sql_server_info(true), '5.6.8', '>=');
if (!$fulltext_supported)
{
return $this->user->lang['FULLTEXT_MYSQL_NOT_SUPPORTED'];
}
$sql = 'SHOW VARIABLES
LIKE \'ft\_%\'';
$result = $this->db->sql_query($sql);
$mysql_info = array();
while ($row = $this->db->sql_fetchrow($result))
{
$mysql_info[$row['Variable_name']] = $row['Value'];
}
$this->db->sql_freeresult($result);
$this->config->set('fulltext_mysql_max_word_len', $mysql_info['ft_max_word_len']);
$this->config->set('fulltext_mysql_min_word_len', $mysql_info['ft_min_word_len']);
return false;
}
/**
* Splits keywords entered by a user into an array of words stored in $this->split_words
* Stores the tidied search query in $this->search_query
*
* @param string &$keywords Contains the keyword as entered by the user
* @param string $terms is either 'all' or 'any'
* @return bool false if no valid keywords were found and otherwise true
*/
public function split_keywords(&$keywords, $terms)
{
if ($terms == 'all')
{
$match = array('#\sand\s#iu', '#\sor\s#iu', '#\snot\s#iu', '#(^|\s)\+#', '#(^|\s)-#', '#(^|\s)\|#');
$replace = array(' +', ' |', ' -', ' +', ' -', ' |');
$keywords = preg_replace($match, $replace, $keywords);
}
// Filter out as above
$split_keywords = preg_replace("#[\n\r\t]+#", ' ', trim(htmlspecialchars_decode($keywords)));
// Split words
$split_keywords = preg_replace('#([^\p{L}\p{N}\'*"()])#u', '$1$1', str_replace('\'\'', '\' \'', trim($split_keywords)));
$matches = array();
preg_match_all('#(?:[^\p{L}\p{N}*"()]|^)([+\-|]?(?:[\p{L}\p{N}*"()]+\'?)*[\p{L}\p{N}*"()])(?:[^\p{L}\p{N}*"()]|$)#u', $split_keywords, $matches);
$this->split_words = $matches[1];
// We limit the number of allowed keywords to minimize load on the database
if ($this->config['max_num_search_keywords'] && count($this->split_words) > $this->config['max_num_search_keywords'])
{
trigger_error($this->user->lang('MAX_NUM_SEARCH_KEYWORDS_REFINE', (int) $this->config['max_num_search_keywords'], count($this->split_words)));
}
// to allow phrase search, we need to concatenate quoted words
$tmp_split_words = array();
$phrase = '';
foreach ($this->split_words as $word)
{
if ($phrase)
{
$phrase .= ' ' . $word;
if (strpos($word, '"') !== false && substr_count($word, '"') % 2 == 1)
{
$tmp_split_words[] = $phrase;
$phrase = '';
}
}
else if (strpos($word, '"') !== false && substr_count($word, '"') % 2 == 1)
{
$phrase = $word;
}
else
{
$tmp_split_words[] = $word;
}
}
if ($phrase)
{
$tmp_split_words[] = $phrase;
}
$this->split_words = $tmp_split_words;
unset($tmp_split_words);
unset($phrase);
foreach ($this->split_words as $i => $word)
{
// Check for not allowed search queries for InnoDB.
// We assume similar restrictions for MyISAM, which is usually even
// slower but not as restrictive as InnoDB.
// InnoDB full-text search does not support the use of a leading
// plus sign with wildcard ('+*'), a plus and minus sign
// combination ('+-'), or leading a plus and minus sign combination.
// InnoDB full-text search only supports leading plus or minus signs.
// For example, InnoDB supports '+apple' but does not support 'apple+'.
// Specifying a trailing plus or minus sign causes InnoDB to report
// a syntax error. InnoDB full-text search does not support the use
// of multiple operators on a single search word, as in this example:
// '++apple'. Use of multiple operators on a single search word
// returns a syntax error to standard out.
// Also, ensure that the wildcard character is only used at the
// end of the line as it's intended by MySQL.
if (preg_match('#^(\+[+-]|\+\*|.+[+-]$|.+\*(?!$))#', $word))
{
unset($this->split_words[$i]);
continue;
}
$clean_word = preg_replace('#^[+\-|"]#', '', $word);
// check word length
$clean_len = utf8_strlen(str_replace('*', '', $clean_word));
if (($clean_len < $this->config['fulltext_mysql_min_word_len']) || ($clean_len > $this->config['fulltext_mysql_max_word_len']))
{
$this->common_words[] = $word;
unset($this->split_words[$i]);
}
}
if ($terms == 'any')
{
$this->search_query = '';
foreach ($this->split_words as $word)
{
if ((strpos($word, '+') === 0) || (strpos($word, '-') === 0) || (strpos($word, '|') === 0))
{
$word = substr($word, 1);
}
$this->search_query .= $word . ' ';
}
}
else
{
$this->search_query = '';
foreach ($this->split_words as $word)
{
if ((strpos($word, '+') === 0) || (strpos($word, '-') === 0))
{
$this->search_query .= $word . ' ';
}
else if (strpos($word, '|') === 0)
{
$this->search_query .= substr($word, 1) . ' ';
}
else
{
$this->search_query .= '+' . $word . ' ';
}
}
}
$this->search_query = utf8_htmlspecialchars($this->search_query);
if ($this->search_query)
{
$this->split_words = array_values($this->split_words);
sort($this->split_words);
return true;
}
return false;
}
/**
* Turns text into an array of words
* @param string $text contains post text/subject
*/
public function split_message($text)
{
// Split words
$text = preg_replace('#([^\p{L}\p{N}\'*])#u', '$1$1', str_replace('\'\'', '\' \'', trim($text)));
$matches = array();
preg_match_all('#(?:[^\p{L}\p{N}*]|^)([+\-|]?(?:[\p{L}\p{N}*]+\'?)*[\p{L}\p{N}*])(?:[^\p{L}\p{N}*]|$)#u', $text, $matches);
$text = $matches[1];
// remove too short or too long words
$text = array_values($text);
for ($i = 0, $n = count($text); $i < $n; $i++)
{
$text[$i] = trim($text[$i]);
if (utf8_strlen($text[$i]) < $this->config['fulltext_mysql_min_word_len'] || utf8_strlen($text[$i]) > $this->config['fulltext_mysql_max_word_len'])
{
unset($text[$i]);
}
}
return array_values($text);
}
/**
* Performs a search on keywords depending on display specific params. You have to run split_keywords() first
*
* @param string $type contains either posts or topics depending on what should be searched for
* @param string $fields contains either titleonly (topic titles should be searched), msgonly (only message bodies should be searched), firstpost (only subject and body of the first post should be searched) or all (all post bodies and subjects should be searched)
* @param string $terms is either 'all' (use query as entered, words without prefix should default to "have to be in field") or 'any' (ignore search query parts and just return all posts that contain any of the specified words)
* @param array $sort_by_sql contains SQL code for the ORDER BY part of a query
* @param string $sort_key is the key of $sort_by_sql for the selected sorting
* @param string $sort_dir is either a or d representing ASC and DESC
* @param string $sort_days specifies the maximum amount of days a post may be old
* @param array $ex_fid_ary specifies an array of forum ids which should not be searched
* @param string $post_visibility specifies which types of posts the user can view in which forums
* @param int $topic_id is set to 0 or a topic id, if it is not 0 then only posts in this topic should be searched
* @param array $author_ary an array of author ids if the author should be ignored during the search the array is empty
* @param string $author_name specifies the author match, when ANONYMOUS is also a search-match
* @param array &$id_ary passed by reference, to be filled with ids for the page specified by $start and $per_page, should be ordered
* @param int $start indicates the first index of the page
* @param int $per_page number of ids each page is supposed to contain
* @return boolean|int total number of results
*/
public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
{
// No keywords? No posts
if (!$this->search_query)
{
return false;
}
// generate a search_key from all the options to identify the results
$search_key_array = array(
implode(', ', $this->split_words),
$type,
$fields,
$terms,
$sort_days,
$sort_key,
$topic_id,
implode(',', $ex_fid_ary),
$post_visibility,
implode(',', $author_ary)
);
/**
* Allow changing the search_key for cached results
*
* @event core.search_mysql_by_keyword_modify_search_key
* @var array search_key_array Array with search parameters to generate the search_key
* @var string type Searching type ('posts', 'topics')
* @var string fields Searching fields ('titleonly', 'msgonly', 'firstpost', 'all')
* @var string terms Searching terms ('all', 'any')
* @var int sort_days Time, in days, of the oldest possible post to list
* @var string sort_key The sort type used from the possible sort types
* @var int topic_id Limit the search to this topic_id only
* @var array ex_fid_ary Which forums not to search on
* @var string post_visibility Post visibility data
* @var array author_ary Array of user_id containing the users to filter the results to
* @since 3.1.7-RC1
*/
$vars = array(
'search_key_array',
'type',
'fields',
'terms',
'sort_days',
'sort_key',
'topic_id',
'ex_fid_ary',
'post_visibility',
'author_ary',
);
extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_by_keyword_modify_search_key', compact($vars)));
$search_key = md5(implode('#', $search_key_array));
if ($start < 0)
{
$start = 0;
}
// try reading the results from cache
$result_count = 0;
if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
{
return $result_count;
}
$id_ary = array();
$join_topic = ($type == 'posts') ? false : true;
// Build sql strings for sorting
$sql_sort = $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');
$sql_sort_table = $sql_sort_join = '';
switch ($sql_sort[0])
{
case 'u':
$sql_sort_table = USERS_TABLE . ' u, ';
$sql_sort_join = ($type == 'posts') ? ' AND u.user_id = p.poster_id ' : ' AND u.user_id = t.topic_poster ';
break;
case 't':
$join_topic = true;
break;
case 'f':
$sql_sort_table = FORUMS_TABLE . ' f, ';
$sql_sort_join = ' AND f.forum_id = p.forum_id ';
break;
}
// Build some display specific sql strings
switch ($fields)
{
case 'titleonly':
$sql_match = 'p.post_subject';
$sql_match_where = ' AND p.post_id = t.topic_first_post_id';
$join_topic = true;
break;
case 'msgonly':
$sql_match = 'p.post_text';
$sql_match_where = '';
break;
case 'firstpost':
$sql_match = 'p.post_subject, p.post_text';
$sql_match_where = ' AND p.post_id = t.topic_first_post_id';
$join_topic = true;
break;
default:
$sql_match = 'p.post_subject, p.post_text';
$sql_match_where = '';
break;
}
$search_query = $this->search_query;
/**
* Allow changing the query used to search for posts using fulltext_mysql
*
* @event core.search_mysql_keywords_main_query_before
* @var string search_query The parsed keywords used for this search
* @var int result_count The previous result count for the format of the query.
* Set to 0 to force a re-count
* @var bool join_topic Weather or not TOPICS_TABLE should be CROSS JOIN'ED
* @var array author_ary Array of user_id containing the users to filter the results to
* @var string author_name An extra username to search on (!empty(author_ary) must be true, to be relevant)
* @var array ex_fid_ary Which forums not to search on
* @var int topic_id Limit the search to this topic_id only
* @var string sql_sort_table Extra tables to include in the SQL query.
* Used in conjunction with sql_sort_join
* @var string sql_sort_join SQL conditions to join all the tables used together.
* Used in conjunction with sql_sort_table
* @var int sort_days Time, in days, of the oldest possible post to list
* @var string sql_match Which columns to do the search on.
* @var string sql_match_where Extra conditions to use to properly filter the matching process
* @var string sort_by_sql The possible predefined sort types
* @var string sort_key The sort type used from the possible sort types
* @var string sort_dir "a" for ASC or "d" dor DESC for the sort order used
* @var string sql_sort The result SQL when processing sort_by_sql + sort_key + sort_dir
* @var int start How many posts to skip in the search results (used for pagination)
* @since 3.1.5-RC1
*/
$vars = array(
'search_query',
'result_count',
'join_topic',
'author_ary',
'author_name',
'ex_fid_ary',
'topic_id',
'sql_sort_table',
'sql_sort_join',
'sort_days',
'sql_match',
'sql_match_where',
'sort_by_sql',
'sort_key',
'sort_dir',
'sql_sort',
'start',
);
extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_keywords_main_query_before', compact($vars)));
$sql_select = (!$result_count) ? 'SQL_CALC_FOUND_ROWS ' : '';
$sql_select = ($type == 'posts') ? $sql_select . 'p.post_id' : 'DISTINCT ' . $sql_select . 't.topic_id';
$sql_from = ($join_topic) ? TOPICS_TABLE . ' t, ' : '';
$field = ($type == 'posts') ? 'post_id' : 'topic_id';
if (count($author_ary) && $author_name)
{
// first one matches post of registered users, second one guests and deleted users
$sql_author = ' AND (' . $this->db->sql_in_set('p.poster_id', array_diff($author_ary, array(ANONYMOUS)), false, true) . ' OR p.post_username ' . $author_name . ')';
}
else if (count($author_ary))
{
$sql_author = ' AND ' . $this->db->sql_in_set('p.poster_id', $author_ary);
}
else
{
$sql_author = '';
}
$sql_where_options = $sql_sort_join;
$sql_where_options .= ($topic_id) ? ' AND p.topic_id = ' . $topic_id : '';
$sql_where_options .= ($join_topic) ? ' AND t.topic_id = p.topic_id' : '';
$sql_where_options .= (count($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
$sql_where_options .= ' AND ' . $post_visibility;
$sql_where_options .= $sql_author;
$sql_where_options .= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
$sql_where_options .= $sql_match_where;
$sql = "SELECT $sql_select
FROM $sql_from$sql_sort_table" . POSTS_TABLE . " p
WHERE MATCH ($sql_match) AGAINST ('" . $this->db->sql_escape(htmlspecialchars_decode($this->search_query)) . "' IN BOOLEAN MODE)
$sql_where_options
ORDER BY $sql_sort";
$this->db->sql_return_on_error(true);
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = (int) $row[$field];
}
$this->db->sql_freeresult($result);
$id_ary = array_unique($id_ary);
// if the total result count is not cached yet, retrieve it from the db
if (!$result_count && count($id_ary))
{
$sql_found_rows = 'SELECT FOUND_ROWS() as result_count';
$result = $this->db->sql_query($sql_found_rows);
$result_count = (int) $this->db->sql_fetchfield('result_count');
$this->db->sql_freeresult($result);
if (!$result_count)
{
return false;
}
}
if ($start >= $result_count)
{
$start = floor(($result_count - 1) / $per_page) * $per_page;
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = (int) $row[$field];
}
$this->db->sql_freeresult($result);
$id_ary = array_unique($id_ary);
}
// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
$this->save_ids($search_key, implode(' ', $this->split_words), $author_ary, $result_count, $id_ary, $start, $sort_dir);
$id_ary = array_slice($id_ary, 0, (int) $per_page);
return $result_count;
}
/**
* Performs a search on an author's posts without caring about message contents. Depends on display specific params
*
* @param string $type contains either posts or topics depending on what should be searched for
* @param boolean $firstpost_only if true, only topic starting posts will be considered
* @param array $sort_by_sql contains SQL code for the ORDER BY part of a query
* @param string $sort_key is the key of $sort_by_sql for the selected sorting
* @param string $sort_dir is either a or d representing ASC and DESC
* @param string $sort_days specifies the maximum amount of days a post may be old
* @param array $ex_fid_ary specifies an array of forum ids which should not be searched
* @param string $post_visibility specifies which types of posts the user can view in which forums
* @param int $topic_id is set to 0 or a topic id, if it is not 0 then only posts in this topic should be searched
* @param array $author_ary an array of author ids
* @param string $author_name specifies the author match, when ANONYMOUS is also a search-match
* @param array &$id_ary passed by reference, to be filled with ids for the page specified by $start and $per_page, should be ordered
* @param int $start indicates the first index of the page
* @param int $per_page number of ids each page is supposed to contain
* @return boolean|int total number of results
*/
public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
{
// No author? No posts
if (!count($author_ary))
{
return 0;
}
// generate a search_key from all the options to identify the results
$search_key_array = array(
'',
$type,
($firstpost_only) ? 'firstpost' : '',
'',
'',
$sort_days,
$sort_key,
$topic_id,
implode(',', $ex_fid_ary),
$post_visibility,
implode(',', $author_ary),
$author_name,
);
/**
* Allow changing the search_key for cached results
*
* @event core.search_mysql_by_author_modify_search_key
* @var array search_key_array Array with search parameters to generate the search_key
* @var string type Searching type ('posts', 'topics')
* @var boolean firstpost_only Flag indicating if only topic starting posts are considered
* @var int sort_days Time, in days, of the oldest possible post to list
* @var string sort_key The sort type used from the possible sort types
* @var int topic_id Limit the search to this topic_id only
* @var array ex_fid_ary Which forums not to search on
* @var string post_visibility Post visibility data
* @var array author_ary Array of user_id containing the users to filter the results to
* @var string author_name The username to search on
* @since 3.1.7-RC1
*/
$vars = array(
'search_key_array',
'type',
'firstpost_only',
'sort_days',
'sort_key',
'topic_id',
'ex_fid_ary',
'post_visibility',
'author_ary',
'author_name',
);
extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_by_author_modify_search_key', compact($vars)));
$search_key = md5(implode('#', $search_key_array));
if ($start < 0)
{
$start = 0;
}
// try reading the results from cache
$result_count = 0;
if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
{
return $result_count;
}
$id_ary = array();
// Create some display specific sql strings
if ($author_name)
{
// first one matches post of registered users, second one guests and deleted users
$sql_author = '(' . $this->db->sql_in_set('p.poster_id', array_diff($author_ary, array(ANONYMOUS)), false, true) . ' OR p.post_username ' . $author_name . ')';
}
else
{
$sql_author = $this->db->sql_in_set('p.poster_id', $author_ary);
}
$sql_fora = (count($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
$sql_topic_id = ($topic_id) ? ' AND p.topic_id = ' . (int) $topic_id : '';
$sql_time = ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
$sql_firstpost = ($firstpost_only) ? ' AND p.post_id = t.topic_first_post_id' : '';
// Build sql strings for sorting
$sql_sort = $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');
$sql_sort_table = $sql_sort_join = '';
switch ($sql_sort[0])
{
case 'u':
$sql_sort_table = USERS_TABLE . ' u, ';
$sql_sort_join = ($type == 'posts') ? ' AND u.user_id = p.poster_id ' : ' AND u.user_id = t.topic_poster ';
break;
case 't':
$sql_sort_table = ($type == 'posts' && !$firstpost_only) ? TOPICS_TABLE . ' t, ' : '';
$sql_sort_join = ($type == 'posts' && !$firstpost_only) ? ' AND t.topic_id = p.topic_id ' : '';
break;
case 'f':
$sql_sort_table = FORUMS_TABLE . ' f, ';
$sql_sort_join = ' AND f.forum_id = p.forum_id ';
break;
}
$m_approve_fid_sql = ' AND ' . $post_visibility;
/**
* Allow changing the query used to search for posts by author in fulltext_mysql
*
* @event core.search_mysql_author_query_before
* @var int result_count The previous result count for the format of the query.
* Set to 0 to force a re-count
* @var string sql_sort_table CROSS JOIN'ed table to allow doing the sort chosen
* @var string sql_sort_join Condition to define how to join the CROSS JOIN'ed table specifyed in sql_sort_table
* @var string type Either "posts" or "topics" specifying the type of search being made
* @var array author_ary Array of user_id containing the users to filter the results to
* @var string author_name An extra username to search on
* @var string sql_author SQL WHERE condition for the post author ids
* @var int topic_id Limit the search to this topic_id only
* @var string sql_topic_id SQL of topic_id
* @var string sort_by_sql The possible predefined sort types
* @var string sort_key The sort type used from the possible sort types
* @var string sort_dir "a" for ASC or "d" dor DESC for the sort order used
* @var string sql_sort The result SQL when processing sort_by_sql + sort_key + sort_dir
* @var string sort_days Time, in days, that the oldest post showing can have
* @var string sql_time The SQL to search on the time specifyed by sort_days
* @var bool firstpost_only Wether or not to search only on the first post of the topics
* @var string sql_firstpost The SQL with the conditions to join the tables when using firstpost_only
* @var array ex_fid_ary Forum ids that must not be searched on
* @var array sql_fora SQL query for ex_fid_ary
* @var string m_approve_fid_sql WHERE clause condition on post_visibility restrictions
* @var int start How many posts to skip in the search results (used for pagination)
* @since 3.1.5-RC1
*/
$vars = array(
'result_count',
'sql_sort_table',
'sql_sort_join',
'type',
'author_ary',
'author_name',
'sql_author',
'topic_id',
'sql_topic_id',
'sort_by_sql',
'sort_key',
'sort_dir',
'sql_sort',
'sort_days',
'sql_time',
'firstpost_only',
'sql_firstpost',
'ex_fid_ary',
'sql_fora',
'm_approve_fid_sql',
'start',
);
extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_author_query_before', compact($vars)));
// If the cache was completely empty count the results
$calc_results = ($result_count) ? '' : 'SQL_CALC_FOUND_ROWS ';
// Build the query for really selecting the post_ids
if ($type == 'posts')
{
$sql = "SELECT {$calc_results}p.post_id
FROM " . $sql_sort_table . POSTS_TABLE . ' p' . (($firstpost_only) ? ', ' . TOPICS_TABLE . ' t ' : ' ') . "
WHERE $sql_author
$sql_topic_id
$sql_firstpost
$m_approve_fid_sql
$sql_fora
$sql_sort_join
$sql_time
ORDER BY $sql_sort";
$field = 'post_id';
}
else
{
$sql = "SELECT {$calc_results}t.topic_id
FROM " . $sql_sort_table . TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
WHERE $sql_author
$sql_topic_id
$sql_firstpost
$m_approve_fid_sql
$sql_fora
AND t.topic_id = p.topic_id
$sql_sort_join
$sql_time
GROUP BY t.topic_id
ORDER BY $sql_sort";
$field = 'topic_id';
}
// Only read one block of posts from the db and then cache it
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = (int) $row[$field];
}
$this->db->sql_freeresult($result);
// retrieve the total result count if needed
if (!$result_count)
{
$sql_found_rows = 'SELECT FOUND_ROWS() as result_count';
$result = $this->db->sql_query($sql_found_rows);
$result_count = (int) $this->db->sql_fetchfield('result_count');
$this->db->sql_freeresult($result);
if (!$result_count)
{
return false;
}
}
if ($start >= $result_count)
{
$start = floor(($result_count - 1) / $per_page) * $per_page;
$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
while ($row = $this->db->sql_fetchrow($result))
{
$id_ary[] = (int) $row[$field];
}
$this->db->sql_freeresult($result);
$id_ary = array_unique($id_ary);
}
if (count($id_ary))
{
$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);
$id_ary = array_slice($id_ary, 0, $per_page);
return $result_count;
}
return false;
}
/**
* Destroys cached search results, that contained one of the new words in a post so the results won't be outdated
*
* @param string $mode contains the post mode: edit, post, reply, quote ...
* @param int $post_id contains the post id of the post to index
* @param string $message contains the post text of the post
* @param string $subject contains the subject of the post to index
* @param int $poster_id contains the user id of the poster
* @param int $forum_id contains the forum id of parent forum of the post
*/
public function index($mode, $post_id, &$message, &$subject, $poster_id, $forum_id)
{
// Split old and new post/subject to obtain array of words
$split_text = $this->split_message($message);
$split_title = ($subject) ? $this->split_message($subject) : array();
$words = array_unique(array_merge($split_text, $split_title));
/**
* Event to modify method arguments and words before the MySQL search index is updated
*
* @event core.search_mysql_index_before
* @var string mode Contains the post mode: edit, post, reply, quote
* @var int post_id The id of the post which is modified/created
* @var string message New or updated post content
* @var string subject New or updated post subject
* @var int poster_id Post author's user id
* @var int forum_id The id of the forum in which the post is located
* @var array words List of words added to the index
* @var array split_text Array of words from the message
* @var array split_title Array of words from the title
* @since 3.2.3-RC1
*/
$vars = array(
'mode',
'post_id',
'message',
'subject',
'poster_id',
'forum_id',
'words',
'split_text',
'split_title',
);
extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_index_before', compact($vars)));
unset($split_text);
unset($split_title);
// destroy cached search results containing any of the words removed or added
$this->destroy_cache($words, array($poster_id));
unset($words);
}
/**
* Destroy cached results, that might be outdated after deleting a post
*/
public function index_remove($post_ids, $author_ids, $forum_ids)
{
$this->destroy_cache(array(), array_unique($author_ids));
}
/**
* Destroy old cache entries
*/
public function tidy()
{
// destroy too old cached search results
$this->destroy_cache(array());
$this->config->set('search_last_gc', time(), false);
}
/**
* Create fulltext index
*
* @return string|bool error string is returned incase of errors otherwise false
*/
public function create_index($acp_module, $u_action)
{
// Make sure we can actually use MySQL with fulltext indexes
if ($error = $this->init())
{
return $error;
}
if (empty($this->stats))
{
$this->get_stats();
}
$alter_list = array();
if (!isset($this->stats['post_subject']))
{
$alter_entry = array();
if ($this->db->get_sql_layer() == 'mysqli' || version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
{
$alter_entry[] = 'MODIFY post_subject varchar(255) COLLATE utf8_unicode_ci DEFAULT \'\' NOT NULL';
}
else
{
$alter_entry[] = 'MODIFY post_subject text NOT NULL';
}
$alter_entry[] = 'ADD FULLTEXT (post_subject)';
$alter_list[] = $alter_entry;
}
if (!isset($this->stats['post_content']))
{
$alter_entry = array();
if ($this->db->get_sql_layer() == 'mysqli' || version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
{
$alter_entry[] = 'MODIFY post_text mediumtext COLLATE utf8_unicode_ci NOT NULL';
}
else
{
$alter_entry[] = 'MODIFY post_text mediumtext NOT NULL';
}
$alter_entry[] = 'ADD FULLTEXT post_content (post_text, post_subject)';
$alter_list[] = $alter_entry;
}
if (count($alter_list))
{
foreach ($alter_list as $alter)
{
$this->db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' ' . implode(', ', $alter));
}
}
if (!isset($this->stats['post_text']))
{
$this->db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' ADD FULLTEXT post_text (post_text)');
}
$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
return false;
}
/**
* Drop fulltext index
*
* @return string|bool error string is returned incase of errors otherwise false
*/
public function delete_index($acp_module, $u_action)
{
// Make sure we can actually use MySQL with fulltext indexes
if ($error = $this->init())
{
return $error;
}
if (empty($this->stats))
{
$this->get_stats();
}
$alter = array();
if (isset($this->stats['post_subject']))
{
$alter[] = 'DROP INDEX post_subject';
}
if (isset($this->stats['post_content']))
{
$alter[] = 'DROP INDEX post_content';
}
if (isset($this->stats['post_text']))
{
$alter[] = 'DROP INDEX post_text';
}
if (count($alter))
{
$this->db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' ' . implode(', ', $alter));
}
$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
return false;
}
/**
* Returns true if both FULLTEXT indexes exist
*/
public function index_created()
{
if (empty($this->stats))
{
$this->get_stats();
}
return isset($this->stats['post_subject']) && isset($this->stats['post_content']) && isset($this->stats['post_text']);
}
/**
* Returns an associative array containing information about the indexes
*/
public function index_stats()
{
if (empty($this->stats))
{
$this->get_stats();
}
return array(
$this->user->lang['FULLTEXT_MYSQL_TOTAL_POSTS'] => ($this->index_created()) ? $this->stats['total_posts'] : 0,
);
}
/**
* Computes the stats and store them in the $this->stats associative array
*/
protected function get_stats()
{
if (strpos($this->db->get_sql_layer(), 'mysql') === false)
{
$this->stats = array();
return;
}
$sql = 'SHOW INDEX
FROM ' . POSTS_TABLE;
$result = $this->db->sql_query($sql);
while ($row = $this->db->sql_fetchrow($result))
{
// deal with older MySQL versions which didn't use Index_type
$index_type = (isset($row['Index_type'])) ? $row['Index_type'] : $row['Comment'];
if ($index_type == 'FULLTEXT')
{
if ($row['Key_name'] == 'post_subject')
{
$this->stats['post_subject'] = $row;
}
else if ($row['Key_name'] == 'post_text')
{
$this->stats['post_text'] = $row;
}
else if ($row['Key_name'] == 'post_content')
{
$this->stats['post_content'] = $row;
}
}
}
$this->db->sql_freeresult($result);
$this->stats['total_posts'] = empty($this->stats) ? 0 : $this->db->get_estimated_row_count(POSTS_TABLE);
}
/**
* Display a note, that UTF-8 support is not available with certain versions of PHP
*
* @return associative array containing template and config variables
*/
public function acp()
{
$tpl = '