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<?php
/**
* @package Joomla.Administrator
* @subpackage com_finder
*
* @copyright Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('_JEXEC') or die;
// Register dependent classes.
JLoader::register('FinderIndexerHelper', dirname(__FILE__) . '/helper.php');
JLoader::register('FinderIndexerParser', dirname(__FILE__) . '/parser.php');
JLoader::register('FinderIndexerStemmer', dirname(__FILE__) . '/stemmer.php');
JLoader::register('FinderIndexerTaxonomy', dirname(__FILE__) . '/taxonomy.php');
JLoader::register('FinderIndexerToken', dirname(__FILE__) . '/token.php');
jimport('joomla.filesystem.file');
/**
* Main indexer class for the Finder indexer package.
*
* The indexer class provides the core functionality of the Finder
* search engine. It is responsible for adding and updating the
* content links table; extracting and scoring tokens; and maintaining
* all referential information for the content.
*
* Note: All exceptions thrown from within this class should be caught
* by the controller.
*
* @package Joomla.Administrator
* @subpackage com_finder
* @since 2.5
*/
class FinderIndexer
{
/**
* The title context identifier.
*
* @var integer
* @since 2.5
*/
const TITLE_CONTEXT = 1;
/**
* The text context identifier.
*
* @var integer
* @since 2.5
*/
const TEXT_CONTEXT = 2;
/**
* The meta context identifier.
*
* @var integer
* @since 2.5
*/
const META_CONTEXT = 3;
/**
* The path context identifier.
*
* @var integer
* @since 2.5
*/
const PATH_CONTEXT = 4;
/**
* The misc context identifier.
*
* @var integer
* @since 2.5
*/
const MISC_CONTEXT = 5;
/**
* The indexer state object.
*
* @var object
* @since 2.5
*/
public static $state;
/**
* The indexer profiler object.
*
* @var object
* @since 2.5
*/
public static $profiler;
/**
* Method to get the indexer state.
*
* @return object The indexer state object.
*
* @since 2.5
*/
public static function getState()
{
// First, try to load from the internal state.
if (!empty(self::$state))
{
return self::$state;
}
// If we couldn't load from the internal state, try the session.
$session = JFactory::getSession();
$data = $session->get('_finder.state', null);
// If the state is empty, load the values for the first time.
if (empty($data))
{
$data = new JObject;
// Load the default configuration options.
$data->options = JComponentHelper::getParams('com_finder');
// Setup the weight lookup information.
$data->weights = array(
self::TITLE_CONTEXT => round($data->options->get('title_multiplier', 1.7), 2),
self::TEXT_CONTEXT => round($data->options->get('text_multiplier', 0.7), 2),
self::META_CONTEXT => round($data->options->get('meta_multiplier', 1.2), 2),
self::PATH_CONTEXT => round($data->options->get('path_multiplier', 2.0), 2),
self::MISC_CONTEXT => round($data->options->get('misc_multiplier', 0.3), 2)
);
// Set the current time as the start time.
$data->startTime = JFactory::getDate()->toSQL();
// Set the remaining default values.
$data->batchSize = (int) $data->options->get('batch_size', 50);
$data->batchOffset = 0;
$data->totalItems = 0;
$data->pluginState = array();
}
// Setup the profiler if debugging is enabled.
if (JFactory::getApplication()->getCfg('debug'))
{
jimport('joomla.error.profiler');
self::$profiler = JProfiler::getInstance('FinderIndexer');
}
// Setup the stemmer.
if ($data->options->get('stem', 1) && $data->options->get('stemmer', 'porter_en'))
{
FinderIndexerHelper::$stemmer = FinderIndexerStemmer::getInstance($data->options->get('stemmer', 'porter_en'));
}
// Set the state.
self::$state = $data;
return self::$state;
}
/**
* Method to set the indexer state.
*
* @param object $data A new indexer state object.
*
* @return boolean True on success, false on failure.
*
* @since 2.5
*/
public static function setState($data)
{
// Check the state object.
if (empty($data) || !$data instanceof JObject)
{
return false;
}
// Set the new internal state.
self::$state = $data;
// Set the new session state.
$session = JFactory::getSession();
$session->set('_finder.state', $data);
return true;
}
/**
* Method to reset the indexer state.
*
* @return void
*
* @since 2.5
*/
public static function resetState()
{
// Reset the internal state to null.
self::$state = null;
// Reset the session state to null.
$session = JFactory::getSession();
$session->set('_finder.state', null);
}
/**
* Method to index a content item.
*
* @param FinderIndexerResult $item The content item to index.
* @param string $format The format of the content. [optional]
*
* @return integer The ID of the record in the links table.
*
* @since 2.5
* @throws Exception on database error.
*/
public static function index($item, $format = 'html')
{
// Mark beforeIndexing in the profiler.
self::$profiler ? self::$profiler->mark('beforeIndexing') : null;
$db = JFactory::getDBO();
$nd = $db->getNullDate();
// Check if the item is in the database.
$query = $db->getQuery(true);
$query->select($db->quoteName('link_id') . ', ' . $db->quoteName('md5sum'));
$query->from($db->quoteName('#__finder_links'));
$query->where($db->quoteName('url') . ' = ' . $db->quote($item->url));
// Load the item from the database.
$db->setQuery($query);
$link = $db->loadObject();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Get the indexer state.
$state = FinderIndexer::getState();
// Get the signatures of the item.
$curSig = self::getSignature($item);
$oldSig = isset($link->md5sum) ? $link->md5sum : null;
// Get the other item information.
$linkId = empty($link->link_id) ? null : $link->link_id;
$isNew = empty($link->link_id) ? true : false;
// Check the signatures. If they match, the item is up to date.
if (!$isNew && $curSig == $oldSig)
{
return $linkId;
}
/*
* If the link already exists, flush all the term maps for the item.
* Maps are stored in 16 tables so we need to iterate through and flush
* each table one at a time.
*/
if (!$isNew)
{
for ($i = 0; $i <= 15; $i++)
{
// Flush the maps for the link.
$query->clear();
$query->delete();
$query->from($db->quoteName('#__finder_links_terms' . dechex($i)));
$query->where($db->quoteName('link_id') . ' = ' . (int) $linkId);
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
// Remove the taxonomy maps.
FinderIndexerTaxonomy::removeMaps($linkId);
}
// Mark afterUnmapping in the profiler.
self::$profiler ? self::$profiler->mark('afterUnmapping') : null;
// Perform cleanup on the item data.
$item->publish_start_date = intval($item->publish_start_date) != 0 ? $item->publish_start_date : $nd;
$item->publish_end_date = intval($item->publish_end_date) != 0 ? $item->publish_end_date : $nd;
$item->start_date = intval($item->start_date) != 0 ? $item->start_date : $nd;
$item->end_date = intval($item->end_date) != 0 ? $item->end_date : $nd;
// Prepare the item description.
$item->description = FinderIndexerHelper::parse($item->summary);
/*
* Now, we need to enter the item into the links table. If the item
* already exists in the database, we need to use an UPDATE query.
* Otherwise, we need to use an INSERT to get the link id back.
*/
if ($isNew)
{
$columnsArray = array(
$db->quoteName('url'), $db->quoteName('route'), $db->quoteName('title'), $db->quoteName('description'),
$db->quoteName('indexdate'), $db->quoteName('published'), $db->quoteName('state'), $db->quoteName('access'),
$db->quoteName('language'), $db->quoteName('type_id'), $db->quoteName('object'), $db->quoteName('publish_start_date'),
$db->quoteName('publish_end_date'), $db->quoteName('start_date'), $db->quoteName('end_date'), $db->quoteName('list_price'),
$db->quoteName('sale_price')
);
// Insert the link.
$query->clear();
$query->insert($db->quoteName('#__finder_links'));
$query->columns($columnsArray);
$query->values(
$db->quote($item->url) . ', '
. $db->quote($item->route) . ', '
. $db->quote($item->title) . ', '
. $db->quote($item->description) . ', '
. $query->currentTimestamp() . ', '
. '1, '
. (int) $item->state . ', '
. (int) $item->access . ', '
. $db->quote($item->language) . ', '
. (int) $item->type_id . ', '
. $db->quote(serialize($item)) . ', '
. $db->quote($item->publish_start_date) . ', '
. $db->quote($item->publish_end_date) . ', '
. $db->quote($item->start_date) . ', '
. $db->quote($item->end_date) . ', '
. $db->quote($item->list_price) . ', '
. $db->quote($item->sale_price)
);
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Get the link id.
$linkId = (int) $db->insertid();
}
else
{
// Update the link.
//@TODO: Implement this
$query->clear();
$query->update($db->qn('#__finder_links'));
$query->set($db->qn('route') . ' = ' . $db->quote($item->route));
$query->set($db->qn('title') . ' = ' . $db->quote($item->title));
$query->set($db->qn('description') . ' = ' . $db->quote($item->description));
$query->set($db->qn('indexdate') . ' = ' . $query->currentTimestamp());
$query->set($db->qn('state') . ' = ' . (int) $item->state);
$query->set($db->qn('access') . ' = ' . (int) $item->access);
$query->set($db->qn('language') . ' = ' . $db->quote($item->language));
$query->set($db->qn('type_id') . ' = ' . (int) $item->type_id);
$query->set($db->qn('object') . ' = ' . $db->quote(serialize($item)));
$query->set($db->qn('publish_start_date') . ' = ' . $db->quote($item->publish_start_date));
$query->set($db->qn('publish_end_date') . ' = ' . $db->quote($item->publish_end_date));
$query->set($db->qn('start_date') . ' = ' . $db->quote($item->start_date));
$query->set($db->qn('end_date') . ' = ' . $db->quote($item->end_date));
$query->set($db->qn('list_price') . ' = ' . $db->quote($item->list_price));
$query->set($db->qn('sale_price') . ' = ' . $db->quote($item->sale_price));
$query->where('link_id = ' . (int) $linkId);
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
// Set up the variables we will need during processing.
$tokens = array();
$count = 0;
// Mark afterLinking in the profiler.
self::$profiler ? self::$profiler->mark('afterLinking') : null;
// Truncate the tokens tables.
$db->truncateTable('#__finder_tokens');
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Truncate the tokens aggregate table.
$db->truncateTable('#__finder_tokens_aggregate');
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
/*
* Process the item's content. The items can customize their
* processing instructions to define extra properties to process
* or rearrange how properties are weighted.
*/
foreach ($item->getInstructions() as $group => $properties)
{
// Iterate through the properties of the group.
foreach ($properties as $property)
{
// Check if the property exists in the item.
if (empty($item->$property))
{
continue;
}
// Tokenize the property.
if (is_array($item->$property))
{
// Tokenize an array of content and add it to the database.
foreach ($item->$property as $ip)
{
// If the group is path, we need to a few extra processing
// steps to strip the extension and convert slashes and dashes
// to spaces.
if ($group === self::PATH_CONTEXT)
{
$ip = JFile::stripExt($ip);
$ip = str_replace('/', ' ', $ip);
$ip = str_replace('-', ' ', $ip);
}
// Tokenize a string of content and add it to the database.
$count += FinderIndexer::tokenizeToDB($ip, $group, $item->language, $format);
// Check if we're approaching the memory limit of the token table.
if ($count > self::$state->options->get('memory_table_limit', 30000))
{
FinderIndexer::toggleTables(false);
}
}
}
else
{
// If the group is path, we need to a few extra processing
// steps to strip the extension and convert slashes and dashes
// to spaces.
if ($group === self::PATH_CONTEXT)
{
$item->$property = JFile::stripExt($item->$property);
$item->$property = str_replace('/', ' ', $item->$property);
$item->$property = str_replace('-', ' ', $item->$property);
}
// Tokenize a string of content and add it to the database.
$count += FinderIndexer::tokenizeToDB($item->$property, $group, $item->language, $format);
// Check if we're approaching the memory limit of the token table.
if ($count > self::$state->options->get('memory_table_limit', 30000))
{
FinderIndexer::toggleTables(false);
}
}
}
}
/*
* Process the item's taxonomy. The items can customize their
* taxonomy mappings to define extra properties to map.
*/
foreach ($item->getTaxonomy() as $branch => $nodes)
{
// Iterate through the nodes and map them to the branch.
foreach ($nodes as $node)
{
// Add the node to the tree.
$nodeId = FinderIndexerTaxonomy::addNode($branch, $node->title, $node->state, $node->access);
// Add the link => node map.
FinderIndexerTaxonomy::addMap($linkId, $nodeId);
// Tokenize the node title and add them to the database.
$count += FinderIndexer::tokenizeToDB($node->title, self::META_CONTEXT, $item->language, $format);
}
}
// Mark afterProcessing in the profiler.
self::$profiler ? self::$profiler->mark('afterProcessing') : null;
/*
* At this point, all of the item's content has been parsed, tokenized
* and inserted into the #__finder_tokens table. Now, we need to
* aggregate all the data into that table into a more usable form. The
* aggregated data will be inserted into #__finder_tokens_aggregate
* table.
*/
$query = 'INSERT INTO ' . $db->quoteName('#__finder_tokens_aggregate') .
' (' . $db->quoteName('term_id') .
', ' . $db->quoteName('term') .
', ' . $db->quoteName('stem') .
', ' . $db->quoteName('common') .
', ' . $db->quoteName('phrase') .
', ' . $db->quoteName('term_weight') .
', ' . $db->quoteName('context') .
', ' . $db->quoteName('context_weight') . ')' .
' SELECT' .
' t.term_id, t1.term, t1.stem, t1.common, t1.phrase, t1.weight, t1.context,' .
' ROUND( t1.weight * COUNT( t2.term ) * %F, 8 ) AS context_weight' .
' FROM (' .
' SELECT DISTINCT t1.term, t1.stem, t1.common, t1.phrase, t1.weight, t1.context' .
' FROM ' . $db->quoteName('#__finder_tokens') . ' AS t1' .
' WHERE t1.context = %d' .
' ) AS t1' .
' JOIN ' . $db->quoteName('#__finder_tokens') . ' AS t2 ON t2.term = t1.term' .
' LEFT JOIN ' . $db->quoteName('#__finder_terms') . ' AS t ON t.term = t1.term' .
' WHERE t2.context = %d' .
' GROUP BY t1.term' .
' ORDER BY t1.term DESC';
// Iterate through the contexts and aggregate the tokens per context.
foreach ($state->weights as $context => $multiplier)
{
// Run the query to aggregate the tokens for this context..
$db->setQuery(sprintf($query, $multiplier, $context, $context));
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
// Mark afterAggregating in the profiler.
self::$profiler ? self::$profiler->mark('afterAggregating') : null;
/*
* When we pulled down all of the aggregate data, we did a LEFT JOIN
* over the terms table to try to find all the term ids that
* already exist for our tokens. If any of the rows in the aggregate
* table have a term of 0, then no term record exists for that
* term so we need to add it to the terms table.
*/
//@TODO: PostgreSQL doesn't support SOUNDEX out of the box
/* This edit is causing the indexer to fail.
$queryInsIgn = 'INSERT INTO ' . $db->quoteName('#__finder_terms') .
' (' . $db->quoteName('term') .
', ' . $db->quoteName('stem') .
', ' . $db->quoteName('common') .
', ' . $db->quoteName('phrase') .
', ' . $db->quoteName('weight') .
', ' . $db->quoteName('soundex') . ')' .
' SELECT ta.term, ta.stem, ta.common, ta.phrase, ta.term_weight, SOUNDEX(ta.term)' .
' FROM ' . $db->quoteName('#__finder_tokens_aggregate') . ' AS ta' .
' WHERE 1 NOT IN ' .
'( SELECT 1 FROM ' . $db->quoteName('#__finder_terms') .
' WHERE ta.term_id = 0 )' .
' AND ta.term_id = 0' .
' GROUP BY ta.term';
$db->setQuery($queryInsIgn);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
//@TODO: PostgreSQL doesn't support SOUNDEX out of the box
$query->clear();
$query->select('ta.term, ta.stem, ta.common, ta.phrase, ta.term_weight, SOUNDEX(ta.term)')
->from($db->quoteName('#__finder_tokens_aggregate') . ' AS ta')
->where('ta.term_id = 0');
$db->setQuery($query);
$subQuVal = $db->loadObject();
$quRepl_p1 = 'UPDATE ' . $db->quoteName('#__finder_terms') . ' AS ta' .
' SET ' .
' (' . $db->quoteName('term') .
', ' . $db->quoteName('stem') .
', ' . $db->quoteName('common') .
', ' . $db->quoteName('phrase') .
', ' . $db->quoteName('weight') .
', ' . $db->quoteName('soundex') . ')' .
' = ' .
' (' . $db->quote($subQuVal->term) .
', ' . $db->quote($subQuVal->stem) .
', ' . $db->quote($subQuVal->common) .
', ' . $db->quote($subQuVal->phrase) .
', ' . $db->quote($subQuVal->weight) .
', ' . $db->quote($subQuVal->soundex) . ')' .
' WHERE ' .
$db->quoteName('term') . ' = ' . $db->quote($subQuVal->term) . ' AND ' .
$db->quoteName('stem') . ' = ' . $db->quote($subQuVal->stem) . ' AND ' .
$db->quoteName('common') . ' = ' . $db->quote($subQuVal->common) . ' AND ' .
$db->quoteName('phrase') . ' = ' . $db->quote($subQuVal->phrase) . ' AND ' .
$db->quoteName('weight') . ' = ' . $db->quote($subQuVal->weight) . ' AND ' .
$db->quoteName('soundex') . ' = ' . $db->quote($subQuVal->soundex);
$db->setQuery($quRepl_p1);
$db->query();
$quRepl_p2 = 'INSERT INTO ' . $db->quoteName('#__finder_terms') .
' (' . $db->quoteName('term') .
', ' . $db->quoteName('stem') .
', ' . $db->quoteName('common') .
', ' . $db->quoteName('phrase') .
', ' . $db->quoteName('weight') .
', ' . $db->quoteName('soundex') . ')' .
' SELECT ta.term, ta.stem, ta.common, ta.phrase, ta.term_weight, SOUNDEX(ta.term)' .
' FROM ' . $db->quoteName('#__finder_tokens_aggregate') . ' AS ta' .
' WHERE 1 NOT IN ' .
'( SELECT 1 FROM ' . $db->quoteName('#__finder_terms') .
' WHERE ta.term_id = 0 )' .
' AND ta.term_id = 0' .
' GROUP BY ta.term';
$db->setQuery($quRepl_p2);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
throw new Exception($db->getErrorMsg(), 500);
}
}
End of failing edit */
//@TODO: PostgreSQL doesn't support INSERT IGNORE INTO
//@TODO: PostgreSQL doesn't support SOUNDEX out of the box
$db->setQuery(
'INSERT IGNORE INTO ' . $db->quoteName('#__finder_terms') .
' (' . $db->quoteName('term') .
', ' . $db->quoteName('stem') .
', ' . $db->quoteName('common') .
', ' . $db->quoteName('phrase') .
', ' . $db->quoteName('weight') .
', ' . $db->quoteName('soundex') . ')' .
' SELECT ta.term, ta.stem, ta.common, ta.phrase, ta.term_weight, SOUNDEX(ta.term)' .
' FROM ' . $db->quoteName('#__finder_tokens_aggregate') . ' AS ta' .
' WHERE ta.term_id = 0' .
' GROUP BY ta.term'
);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
{
throw new Exception($db->getErrorMsg(), 500);
}
}
/*
* Now, we just inserted a bunch of new records into the terms table
* so we need to go back and update the aggregate table with all the
* new term ids.
*/
$query = $db->getQuery(true);
$query->update($db->quoteName('#__finder_tokens_aggregate') . ' AS ta');
$query->join('INNER', $db->quoteName('#__finder_terms') . ' AS t ON t.term = ta.term');
$query->set('ta.term_id = t.term_id');
$query->where('ta.term_id = 0');
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Mark afterTerms in the profiler.
self::$profiler ? self::$profiler->mark('afterTerms') : null;
/*
* After we've made sure that all of the terms are in the terms table
* and the aggregate table has the correct term ids, we need to update
* the links counter for each term by one.
*/
$query->clear();
$query->update($db->quoteName('#__finder_terms') . ' AS t');
$query->join('INNER', $db->quoteName('#__finder_tokens_aggregate') . ' AS ta ON ta.term_id = t.term_id');
$query->set('t.' . $db->quoteName('links') . ' = t.links + 1');
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Mark afterTerms in the profiler.
self::$profiler ? self::$profiler->mark('afterTerms') : null;
/*
* Before we can insert all of the mapping rows, we have to figure out
* which mapping table the rows need to be inserted into. The mapping
* table for each term is based on the first character of the md5 of
* the first character of the term. In php, it would be expressed as
* substr(md5(substr($token, 0, 1)), 0, 1)
*/
$query->clear();
$query->update($db->quoteName('#__finder_tokens_aggregate'));
$query->set($db->quoteName('map_suffix') . ' = SUBSTR(MD5(SUBSTR(' . $db->quoteName('term') . ', 1, 1)), 1, 1)');
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
/*
* At this point, the aggregate table contains a record for each
* term in each context. So, we're going to pull down all of that
* data while grouping the records by term and add all of the
* sub-totals together to arrive at the final total for each token for
* this link. Then, we insert all of that data into the appropriate
* mapping table.
*/
for ($i = 0; $i <= 15; $i++)
{
// Get the mapping table suffix.
$suffix = dechex($i);
/*
* We have to run this query 16 times, one for each link => term
* mapping table.
*/
//@TODO: Convert to JDatabaseQuery
$db->setQuery(
'INSERT INTO ' . $db->quoteName('#__finder_links_terms' . $suffix) .
' (' . $db->quoteName('link_id') .
', ' . $db->quoteName('term_id') .
', ' . $db->quoteName('weight') . ')' .
' SELECT ' . (int) $linkId . ', ' . $db->quoteName('term_id') . ',' .
' ROUND(SUM(' . $db->quoteName('context_weight') . '), 8)' .
' FROM ' . $db->quoteName('#__finder_tokens_aggregate') .
' WHERE ' . $db->quoteName('map_suffix') . ' = ' . $db->quote($suffix) .
' GROUP BY ' . $db->quoteName('term') .
' ORDER BY ' . $db->quoteName('term') . ' DESC'
);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
// Mark afterMapping in the profiler.
self::$profiler ? self::$profiler->mark('afterMapping') : null;
// Update the signature.
$query->clear();
$query->update($db->quoteName('#__finder_links'));
$query->set($db->quoteName('md5sum') . ' = ' . $db->quote($curSig));
$query->where($db->quoteName('link_id') . ' = ' . $db->quote($linkId));
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Mark afterSigning in the profiler.
self::$profiler ? self::$profiler->mark('afterSigning') : null;
// Truncate the tokens tables.
$db->truncateTable('#__finder_tokens');
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Truncate the tokens aggregate table.
$db->truncateTable('#__finder_tokens_aggregate');
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Toggle the token tables back to memory tables.
FinderIndexer::toggleTables(true);
// Mark afterTruncating in the profiler.
self::$profiler ? self::$profiler->mark('afterTruncating') : null;
return $linkId;
}
/**
* Method to remove a link from the index.
*
* @param integer $linkId The id of the link.
*
* @return boolean True on success.
*
* @since 2.5
* @throws Exception on database error.
*/
public static function remove($linkId)
{
$db = JFactory::getDBO();
$query = $db->getQuery(true);
// Get the indexer state.
$state = FinderIndexer::getState();
// Update the link counts and remove the mapping records.
for ($i = 0; $i <= 15; $i++)
{
// Update the link counts for the terms.
$query->update($db->quoteName('#__finder_terms') . ' AS t');
$query->join('INNER', $db->quoteName('#__finder_links_terms' . dechex($i)) . ' AS m ON m.term_id = t.term_id');
$query->set($db->quoteName('t'). '.' . $db->quoteName('links') . ' ='. $db->quoteName('t') .'.' . $db->quoteName('links') . ' - 1');
$query->where($db->quoteName('m') . '.' . $db->quoteName('link_id') . ' = ' . $db->quote((int) $linkId));
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Remove all records from the mapping tables.
$query->clear();
$query->delete();
$query->from($db->quoteName('#__finder_links_terms' . dechex($i)));
$query->where($db->quoteName('link_id') . ' = ' . (int) $linkId);
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
// Delete all orphaned terms.
$query->clear();
$query->delete();
$query->from($db->quoteName('#__finder_terms'));
$query->where($db->quoteName('links') . ' <= 0');
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Delete the link from the index.
$query->clear();
$query->delete();
$query->from($db->quoteName('#__finder_links'));
$query->where($db->quoteName('link_id') . ' = ' . $db->quote((int) $linkId));
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Remove the taxonomy maps.
FinderIndexerTaxonomy::removeMaps($linkId);
// Remove the orphaned taxonomy nodes.
FinderIndexerTaxonomy::removeOrphanNodes();
return true;
}
/**
* Method to optimize the index. We use this method to remove unused terms
* and any other optimizations that might be necessary.
*
* @return boolean True on success.
*
* @since 2.5
* @throws Exception on database error.
*/
public static function optimize()
{
// Get the indexer state.
$state = FinderIndexer::getState();
// Get the database object.
$db = JFactory::getDBO();
$query = $db->getQuery(true);
// Delete all orphaned terms.
$query->delete();
$query->from($db->quoteName('#__finder_terms'));
$query->where($db->quoteName('links') . ' <= 0');
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Optimize the links table.
//@TODO: PostgreSQL doesn't support OPTIMIZE TABLE
// Temporary workaround for non-MySQL solutions
if (strpos($db->name, 'mysql') === 0)
{
$db->setQuery('OPTIMIZE TABLE ' . $db->quoteName('#__finder_links'));
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
//@TODO: PostgreSQL doesn't support OPTIMIZE TABLE
// Temporary workaround for non-MySQL solutions
if (strpos($db->name, 'mysql') === 0)
{
for ($i = 0; $i <= 15; $i++)
{
// Optimize the terms mapping table.
$db->setQuery('OPTIMIZE TABLE ' . $db->quoteName('#__finder_links_terms' . dechex($i)));
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
}
// Optimize the terms mapping table.
//@TODO: PostgreSQL doesn't support OPTIMIZE TABLE
// Temporary workaround for non-MySQL solutions
if (strpos($db->name, 'mysql') === 0)
{
$db->setQuery('OPTIMIZE TABLE ' . $db->quoteName('#__finder_links_terms'));
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
// Remove the orphaned taxonomy nodes.
FinderIndexerTaxonomy::removeOrphanNodes();
// Optimize the taxonomy mapping table.
//@TODO: PostgreSQL doesn't support OPTIMIZE TABLE
// Temporary workaround for non-MySQL solutions
if (strpos($db->name, 'mysql') === 0)
{
$db->setQuery('OPTIMIZE TABLE ' . $db->quoteName('#__finder_taxonomy_map'));
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
}
return true;
}
/**
* Method to get a content item's signature.
*
* @param object $item The content item to index.
*
* @return string The content item's signature.
*
* @since 2.5
*/
protected static function getSignature($item)
{
// Get the indexer state.
$state = FinderIndexer::getState();
// Get the relevant configuration variables.
$config = array();
$config[] = $state->weights;
$config[] = $state->options->get('stem', 1);
$config[] = $state->options->get('stemmer', 'porter_en');
return md5(serialize(array($item, $config)));
}
/**
* Method to parse input, tokenize it, and then add it to the database.
*
* @param mixed $input String or resource to use as input. A resource
* input will automatically be chunked to conserve
* memory. Strings will be chunked if longer than
* 2K in size.
* @param integer $context The context of the input. See context constants.
* @param string $lang The language of the input.
* @param string $format The format of the input.
*
* @return integer The number of tokens extracted from the input.
*
* @since 2.5
*/
protected static function tokenizeToDB($input, $context, $lang, $format)
{
$count = 0;
$buffer = null;
// If the input is a resource, batch the process out.
if (is_resource($input))
{
// Batch the process out to avoid memory limits.
while (!feof($input))
{
// Read into the buffer.
$buffer .= fread($input, 2048);
// If we haven't reached the end of the file, seek to the last
// space character and drop whatever is after that to make sure
// we didn't truncate a term while reading the input.
if (!feof($input))
{
// Find the last space character.
$ls = strrpos($buffer, ' ');
// Adjust string based on the last space character.
if ($ls)
{
// Truncate the string to the last space character.
$string = substr($buffer, 0, $ls);
// Adjust the buffer based on the last space for the
// next iteration and trim.
$buffer = JString::trim(substr($buffer, $ls));
}
// No space character was found.
else
{
$string = $buffer;
}
}
// We've reached the end of the file, so parse whatever remains.
else
{
$string = $buffer;
}
// Parse the input.
$string = FinderIndexerHelper::parse($string, $format);
// Check the input.
if (empty($string))
{
continue;
}
// Tokenize the input.
$tokens = FinderIndexerHelper::tokenize($string, $lang);
// Add the tokens to the database.
$count += FinderIndexer::addTokensToDB($tokens, $context);
// Check if we're approaching the memory limit of the token table.
if ($count > self::$state->options->get('memory_table_limit', 30000))
{
FinderIndexer::toggleTables(false);
}
unset($string);
unset($tokens);
}
}
// If the input is greater than 2K in size, it is more efficient to
// batch out the operation into smaller chunks of work.
elseif (strlen($input) > 2048)
{
$start = 0;
$end = strlen($input);
$chunk = 2048;
// As it turns out, the complex regular expressions we use for
// sanitizing input are not very efficient when given large
// strings. It is much faster to process lots of short strings.
while ($start < $end)
{
// Setup the string.
$string = substr($input, $start, $chunk);
// Find the last space character if we aren't at the end.
$ls = (($start + $chunk) < $end ? strrpos($string, ' ') : false);
// Truncate to the last space character.
if ($ls !== false)
{
$string = substr($string, 0, $ls);
}
// Adjust the start position for the next iteration.
$start += ($ls !== false ? ($ls + 1 - $chunk) + $chunk : $chunk);
// Parse the input.
$string = FinderIndexerHelper::parse($string, $format);
// Check the input.
if (empty($string))
{
continue;
}
// Tokenize the input.
$tokens = FinderIndexerHelper::tokenize($string, $lang);
// Add the tokens to the database.
$count += FinderIndexer::addTokensToDB($tokens, $context);
// Check if we're approaching the memory limit of the token table.
if ($count > self::$state->options->get('memory_table_limit', 30000))
{
FinderIndexer::toggleTables(false);
}
}
}
else
{
// Parse the input.
$input = FinderIndexerHelper::parse($input, $format);
// Check the input.
if (empty($input))
{
return $count;
}
// Tokenize the input.
$tokens = FinderIndexerHelper::tokenize($input, $lang);
// Add the tokens to the database.
$count = FinderIndexer::addTokensToDB($tokens, $context);
}
return $count;
}
/**
* Method to add a set of tokens to the database.
*
* @param mixed $tokens An array or single FinderIndexerToken object.
* @param mixed $context The context of the tokens. See context constants. [optional]
*
* @return integer The number of tokens inserted into the database.
*
* @since 2.5
* @throws Exception on database error.
*/
protected static function addTokensToDB($tokens, $context = '')
{
// Get the database object.
$db = JFactory::getDBO();
$query = $db->getQuery(true);
// Force tokens to an array.
$tokens = is_array($tokens) ? $tokens : array($tokens);
// Count the number of token values.
$values = 0;
// Iterate through the tokens to create SQL value sets.
foreach ($tokens as $token)
{
$query->values(
$db->quote($token->term) . ', '
. $db->quote($token->stem) . ', '
. (int) $token->common . ', '
. (int) $token->phrase . ', '
. (float) $token->weight . ', '
. (int) $context
);
$values++;
}
// Insert the tokens into the database.
$query->insert($db->quoteName('#__finder_tokens'));
$query->columns(
array(
$db->quoteName('term'),
$db->quoteName('stem'),
$db->quoteName('common'),
$db->quoteName('phrase'),
$db->quoteName('weight'),
$db->quoteName('context')
)
);
$db->setQuery($query);
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
return $values;
}
/**
* Method to switch the token tables from Memory tables to MyISAM tables
* when they are close to running out of memory.
*
* @param boolean $memory Flag to control how they should be toggled.
*
* @return boolean True on success.
*
* @since 2.5
* @throws Exception on database error.
* @todo PostgreSQL doesn't support setting ENGINEs, determine how to handle setting tables
*/
protected static function toggleTables($memory)
{
static $state;
// Get the database adapter.
$db = JFactory::getDBO();
// Temporary workaround for non-MySQL solutions
if (strpos($db->name, 'mysql') !== 0)
{
return true;
}
// Check if we are setting the tables to the Memory engine.
if ($memory === true && $state !== true)
{
// Set the tokens table to Memory.
$db->setQuery('ALTER TABLE ' . $db->quoteName('#__finder_tokens') . ' ENGINE = MEMORY');
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Set the tokens aggregate table to Memory.
$db->setQuery('ALTER TABLE ' . $db->quoteName('#__finder_tokens_aggregate') . ' ENGINE = MEMORY');
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Set the internal state.
$state = $memory;
}
// We must be setting the tables to the MyISAM engine.
elseif ($memory === false && $state !== false)
{
// Set the tokens table to MyISAM.
$db->setQuery('ALTER TABLE ' . $db->quoteName('#__finder_tokens') . ' ENGINE = MYISAM');
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Set the tokens aggregate table to MyISAM.
$db->setQuery('ALTER TABLE ' . $db->quoteName('#__finder_tokens_aggregate') . ' ENGINE = MYISAM');
$db->query();
// Check for a database error.
if ($db->getErrorNum())
{
// Throw database error exception.
throw new Exception($db->getErrorMsg(), 500);
}
// Set the internal state.
$state = $memory;
}
return true;
}
}