/**
* Loads all migrations and their application state from the database.
*
* @return null
*/
public function load_migration_state()
{
$this->migration_state = array();
// prevent errors in case the table does not exist yet
$this->db->sql_return_on_error(true);
$sql = "SELECT *\n\t\t\tFROM " . $this->migrations_table;
$result = $this->db->sql_query($sql);
if (!$this->db->get_sql_error_triggered()) {
while ($migration = $this->db->sql_fetchrow($result)) {
$this->migration_state[$migration['migration_name']] = $migration;
$this->migration_state[$migration['migration_name']]['migration_depends_on'] = unserialize($migration['migration_depends_on']);
}
}
$this->db->sql_freeresult($result);
$this->db->sql_return_on_error(false);
}
/**
* Wrapper for running queries to generate user feedback on updates
*
* @param string $sql SQL query to run on the database
* @return mixed Query result from db->sql_query()
*/
protected function sql_query($sql)
{
$this->queries[] = $sql;
$this->db->sql_return_on_error(true);
if ($sql === 'begin') {
$result = $this->db->sql_transaction('begin');
} else {
if ($sql === 'commit') {
$result = $this->db->sql_transaction('commit');
} else {
$result = $this->db->sql_query($sql);
if ($this->db->get_sql_error_triggered()) {
$this->errors[] = array('sql' => $this->db->get_sql_error_sql(), 'code' => $this->db->get_sql_error_returned());
}
}
}
$this->db->sql_return_on_error(false);
return $result;
}
/**
* Updates wordlist and wordmatch tables when a message is posted or changed
*
* @param string $mode Contains the post mode: edit, post, reply, quote
* @param int $post_id The id of the post which is modified/created
* @param string &$message New or updated post content
* @param string &$subject New or updated post subject
* @param int $poster_id Post author's user id
* @param int $forum_id The id of the forum in which the post is located
*/
public function index($mode, $post_id, &$message, &$subject, $poster_id, $forum_id)
{
if (!$this->config['fulltext_native_load_upd']) {
/**
* The search indexer is disabled, return
*/
return;
}
// Split old and new post/subject to obtain array of 'words'
$split_text = $this->split_message($message);
$split_title = $this->split_message($subject);
$cur_words = array('post' => array(), 'title' => array());
$words = array();
if ($mode == 'edit') {
$words['add']['post'] = array();
$words['add']['title'] = array();
$words['del']['post'] = array();
$words['del']['title'] = array();
$sql = 'SELECT w.word_id, w.word_text, m.title_match
FROM ' . SEARCH_WORDLIST_TABLE . ' w, ' . SEARCH_WORDMATCH_TABLE . " m\n\t\t\t\tWHERE m.post_id = {$post_id}\n\t\t\t\t\tAND w.word_id = m.word_id";
$result = $this->db->sql_query($sql);
while ($row = $this->db->sql_fetchrow($result)) {
$which = $row['title_match'] ? 'title' : 'post';
$cur_words[$which][$row['word_text']] = $row['word_id'];
}
$this->db->sql_freeresult($result);
$words['add']['post'] = array_diff($split_text, array_keys($cur_words['post']));
$words['add']['title'] = array_diff($split_title, array_keys($cur_words['title']));
$words['del']['post'] = array_diff(array_keys($cur_words['post']), $split_text);
$words['del']['title'] = array_diff(array_keys($cur_words['title']), $split_title);
} else {
$words['add']['post'] = $split_text;
$words['add']['title'] = $split_title;
$words['del']['post'] = array();
$words['del']['title'] = array();
}
unset($split_text);
unset($split_title);
// Get unique words from the above arrays
$unique_add_words = array_unique(array_merge($words['add']['post'], $words['add']['title']));
// We now have unique arrays of all words to be added and removed and
// individual arrays of added and removed words for text and title. What
// we need to do now is add the new words (if they don't already exist)
// and then add (or remove) matches between the words and this post
if (sizeof($unique_add_words)) {
$sql = 'SELECT word_id, word_text
FROM ' . SEARCH_WORDLIST_TABLE . '
WHERE ' . $this->db->sql_in_set('word_text', $unique_add_words);
$result = $this->db->sql_query($sql);
$word_ids = array();
while ($row = $this->db->sql_fetchrow($result)) {
$word_ids[$row['word_text']] = $row['word_id'];
}
$this->db->sql_freeresult($result);
$new_words = array_diff($unique_add_words, array_keys($word_ids));
$this->db->sql_transaction('begin');
if (sizeof($new_words)) {
$sql_ary = array();
foreach ($new_words as $word) {
$sql_ary[] = array('word_text' => (string) $word, 'word_count' => 0);
}
$this->db->sql_return_on_error(true);
$this->db->sql_multi_insert(SEARCH_WORDLIST_TABLE, $sql_ary);
$this->db->sql_return_on_error(false);
}
unset($new_words, $sql_ary);
} else {
$this->db->sql_transaction('begin');
}
// now update the search match table, remove links to removed words and add links to new words
foreach ($words['del'] as $word_in => $word_ary) {
$title_match = $word_in == 'title' ? 1 : 0;
if (sizeof($word_ary)) {
$sql_in = array();
foreach ($word_ary as $word) {
$sql_in[] = $cur_words[$word_in][$word];
}
$sql = 'DELETE FROM ' . SEARCH_WORDMATCH_TABLE . '
WHERE ' . $this->db->sql_in_set('word_id', $sql_in) . '
AND post_id = ' . intval($post_id) . "\n\t\t\t\t\t\tAND title_match = {$title_match}";
$this->db->sql_query($sql);
$sql = 'UPDATE ' . SEARCH_WORDLIST_TABLE . '
SET word_count = word_count - 1
WHERE ' . $this->db->sql_in_set('word_id', $sql_in) . '
AND word_count > 0';
$this->db->sql_query($sql);
unset($sql_in);
}
}
$this->db->sql_return_on_error(true);
foreach ($words['add'] as $word_in => $word_ary) {
$title_match = $word_in == 'title' ? 1 : 0;
if (sizeof($word_ary)) {
$sql = 'INSERT INTO ' . SEARCH_WORDMATCH_TABLE . ' (post_id, word_id, title_match)
SELECT ' . (int) $post_id . ', word_id, ' . (int) $title_match . '
FROM ' . SEARCH_WORDLIST_TABLE . '
WHERE ' . $this->db->sql_in_set('word_text', $word_ary);
$this->db->sql_query($sql);
$sql = 'UPDATE ' . SEARCH_WORDLIST_TABLE . '
SET word_count = word_count + 1
WHERE ' . $this->db->sql_in_set('word_text', $word_ary);
$this->db->sql_query($sql);
}
}
$this->db->sql_return_on_error(false);
$this->db->sql_transaction('commit');
// destroy cached search results containing any of the words removed or added
$this->destroy_cache(array_unique(array_merge($words['add']['post'], $words['add']['title'], $words['del']['post'], $words['del']['title'])), array($poster_id));
unset($unique_add_words);
unset($words);
unset($cur_words);
}
