--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/forum/Sources/ManageSearch.php	Sun Jul 07 11:25:48 2013 +0200
@@ -0,0 +1,775 @@
+<?php
+
+/**
+ * Simple Machines Forum (SMF)
+ *
+ * @package SMF
+ * @author Simple Machines http://www.simplemachines.org
+ * @copyright 2011 Simple Machines
+ * @license http://www.simplemachines.org/about/smf/license.php BSD
+ *
+ * @version 2.0
+ */
+
+if (!defined('SMF'))
+	die('Hacking attempt...');
+
+/* The admin screen to change the search settings.
+
+	void ManageSearch()
+		- main entry point for the admin search settings screen.
+		- called by ?action=admin;area=managesearch.
+		- requires the admin_forum permission.
+		- loads the ManageSearch template.
+		- loads the Search language file.
+		- calls a function based on the given sub-action.
+		- defaults to sub-action 'settings'.
+
+	void EditSearchSettings()
+		- edit some general settings related to the search function.
+		- called by ?action=admin;area=managesearch;sa=settings.
+		- requires the admin_forum permission.
+		- uses the 'modify_settings' sub template of the ManageSearch template.
+
+	void EditWeights()
+		- edit the relative weight of the search factors.
+		- called by ?action=admin;area=managesearch;sa=weights.
+		- requires the admin_forum permission.
+		- uses the 'modify_weights' sub template of the ManageSearch template.
+
+	void EditSearchMethod()
+		- edit the search method and search index used.
+		- called by ?action=admin;area=managesearch;sa=method.
+		- requires the admin_forum permission.
+		- uses the 'select_search_method' sub template of the ManageSearch
+		  template.
+		- allows to create and delete a fulltext index on the messages table.
+		- allows to delete a custom index (that CreateMessageIndex() created).
+		- calculates the size of the current search indexes in use.
+
+	void CreateMessageIndex()
+		- create a custom search index for the messages table.
+		- called by ?action=admin;area=managesearch;sa=createmsgindex.
+		- linked from the EditSearchMethod screen.
+		- requires the admin_forum permission.
+		- uses the 'create_index', 'create_index_progress', and
+		  'create_index_done' sub templates of the ManageSearch template.
+		- depending on the size of the message table, the process is divided
+		  in steps.
+
+	array loadSearchAPIs()
+		- get the installed APIs.
+
+*/
+
+function ManageSearch()
+{
+	global $context, $txt, $scripturl;
+
+	isAllowedTo('admin_forum');
+
+	loadLanguage('Search');
+	loadTemplate('ManageSearch');
+
+	db_extend('search');
+
+	$subActions = array(
+		'settings' => 'EditSearchSettings',
+		'weights' => 'EditWeights',
+		'method' => 'EditSearchMethod',
+		'createfulltext' => 'EditSearchMethod',
+		'removecustom' => 'EditSearchMethod',
+		'removefulltext' => 'EditSearchMethod',
+		'createmsgindex' => 'CreateMessageIndex',
+	);
+
+	// Default the sub-action to 'edit search settings'.
+	$_REQUEST['sa'] = isset($_REQUEST['sa']) && isset($subActions[$_REQUEST['sa']]) ? $_REQUEST['sa'] : 'weights';
+
+	$context['sub_action'] = $_REQUEST['sa'];
+
+	// Create the tabs for the template.
+	$context[$context['admin_menu_name']]['tab_data'] = array(
+		'title' => $txt['manage_search'],
+		'help' => 'search',
+		'description' => $txt['search_settings_desc'],
+		'tabs' => array(
+			'weights' => array(
+				'description' => $txt['search_weights_desc'],
+			),
+			'method' => array(
+				'description' => $txt['search_method_desc'],
+			),
+			'settings' => array(
+				'description' => $txt['search_settings_desc'],
+			),
+		),
+	);
+
+	// Call the right function for this sub-acton.
+	$subActions[$_REQUEST['sa']]();
+}
+
+function EditSearchSettings($return_config = false)
+{
+	global $txt, $context, $scripturl, $sourcedir, $modSettings;
+
+	// What are we editing anyway?
+	$config_vars = array(
+			// Permission...
+			array('permissions', 'search_posts'),
+			// Some simple settings.
+			array('check', 'simpleSearch'),
+			array('int', 'search_results_per_page'),
+			array('int', 'search_max_results', 'subtext' => $txt['search_max_results_disable']),
+		'',
+			// Some limitations.
+			array('int', 'search_floodcontrol_time', 'subtext' => $txt['search_floodcontrol_time_desc']),
+	);
+
+	// Perhaps the search method wants to add some settings?
+	$modSettings['search_index'] = empty($modSettings['search_index']) ? 'standard' : $modSettings['search_index'];
+	if (file_exists($sourcedir . '/SearchAPI-' . ucwords($modSettings['search_index']) . '.php'))
+	{
+		loadClassFile('SearchAPI-' . ucwords($modSettings['search_index']) . '.php');
+
+		$method_call = array($modSettings['search_index'] . '_search', 'searchSettings');
+		if (is_callable($method_call))
+			call_user_func_array($method_call, array(&$config_vars));
+	}
+
+	if ($return_config)
+		return $config_vars;
+
+	$context['page_title'] = $txt['search_settings_title'];
+	$context['sub_template'] = 'show_settings';
+
+	// We'll need this for the settings.
+	require_once($sourcedir . '/ManageServer.php');
+
+	// A form was submitted.
+	if (isset($_REQUEST['save']))
+	{
+		checkSession();
+
+		saveDBSettings($config_vars);
+		redirectexit('action=admin;area=managesearch;sa=settings;' . $context['session_var'] . '=' . $context['session_id']);
+	}
+
+	// Prep the template!
+	$context['post_url'] = $scripturl . '?action=admin;area=managesearch;save;sa=settings';
+	$context['settings_title'] = $txt['search_settings_title'];
+
+	prepareDBSettingContext($config_vars);
+}
+
+function EditWeights()
+{
+	global $txt, $context, $modSettings;
+
+	$context['page_title'] = $txt['search_weights_title'];
+	$context['sub_template'] = 'modify_weights';
+
+	$factors = array(
+		'search_weight_frequency',
+		'search_weight_age',
+		'search_weight_length',
+		'search_weight_subject',
+		'search_weight_first_message',
+		'search_weight_sticky',
+	);
+
+	// A form was submitted.
+	if (isset($_POST['save']))
+	{
+		checkSession();
+
+		$changes = array();
+		foreach ($factors as $factor)
+			$changes[$factor] = (int) $_POST[$factor];
+		updateSettings($changes);
+	}
+
+	$context['relative_weights'] = array('total' => 0);
+	foreach ($factors as $factor)
+		$context['relative_weights']['total'] += isset($modSettings[$factor]) ? $modSettings[$factor] : 0;
+
+	foreach ($factors as $factor)
+		$context['relative_weights'][$factor] = round(100 * (isset($modSettings[$factor]) ? $modSettings[$factor] : 0) / $context['relative_weights']['total'], 1);
+}
+
+function EditSearchMethod()
+{
+	global $txt, $context, $modSettings, $smcFunc, $db_type, $db_prefix;
+
+	$context[$context['admin_menu_name']]['current_subsection'] = 'method';
+	$context['page_title'] = $txt['search_method_title'];
+	$context['sub_template'] = 'select_search_method';
+	$context['supports_fulltext'] = $smcFunc['db_search_support']('fulltext');
+
+	// Load any apis.
+	$context['search_apis'] = loadSearchAPIs();
+
+	// Detect whether a fulltext index is set.
+	if ($context['supports_fulltext'])
+	{
+		$request = $smcFunc['db_query']('', '
+			SHOW INDEX
+			FROM {db_prefix}messages',
+			array(
+			)
+		);
+		$context['fulltext_index'] = '';
+		if ($request !== false || $smcFunc['db_num_rows']($request) != 0)
+		{
+			while ($row = $smcFunc['db_fetch_assoc']($request))
+				if ($row['Column_name'] == 'body' && (isset($row['Index_type']) && $row['Index_type'] == 'FULLTEXT' || isset($row['Comment']) && $row['Comment'] == 'FULLTEXT'))
+					$context['fulltext_index'][] = $row['Key_name'];
+			$smcFunc['db_free_result']($request);
+
+			if (is_array($context['fulltext_index']))
+				$context['fulltext_index'] = array_unique($context['fulltext_index']);
+		}
+
+		$request = $smcFunc['db_query']('', '
+			SHOW COLUMNS
+			FROM {db_prefix}messages',
+			array(
+			)
+		);
+		if ($request !== false)
+		{
+			while ($row = $smcFunc['db_fetch_assoc']($request))
+				if ($row['Field'] == 'body' && $row['Type'] == 'mediumtext')
+					$context['cannot_create_fulltext'] = true;
+			$smcFunc['db_free_result']($request);
+		}
+
+		if (preg_match('~^`(.+?)`\.(.+?)$~', $db_prefix, $match) !== 0)
+			$request = $smcFunc['db_query']('', '
+				SHOW TABLE STATUS
+				FROM {string:database_name}
+				LIKE {string:table_name}',
+				array(
+					'database_name' => '`' . strtr($match[1], array('`' => '')) . '`',
+					'table_name' => str_replace('_', '\_', $match[2]) . 'messages',
+				)
+			);
+		else
+			$request = $smcFunc['db_query']('', '
+				SHOW TABLE STATUS
+				LIKE {string:table_name}',
+				array(
+					'table_name' => str_replace('_', '\_', $db_prefix) . 'messages',
+				)
+			);
+
+		if ($request !== false)
+		{
+			while ($row = $smcFunc['db_fetch_assoc']($request))
+				if ((isset($row['Type']) && strtolower($row['Type']) != 'myisam') || (isset($row['Engine']) && strtolower($row['Engine']) != 'myisam'))
+					$context['cannot_create_fulltext'] = true;
+			$smcFunc['db_free_result']($request);
+		}
+	}
+
+	if (!empty($_REQUEST['sa']) && $_REQUEST['sa'] == 'createfulltext')
+	{
+		checkSession('get');
+
+		// Make sure it's gone before creating it.
+		$smcFunc['db_query']('', '
+			ALTER TABLE {db_prefix}messages
+			DROP INDEX body',
+			array(
+				'db_error_skip' => true,
+			)
+		);
+
+		$smcFunc['db_query']('', '
+			ALTER TABLE {db_prefix}messages
+			ADD FULLTEXT body (body)',
+			array(
+			)
+		);
+
+		$context['fulltext_index'] = 'body';
+	}
+	elseif (!empty($_REQUEST['sa']) && $_REQUEST['sa'] == 'removefulltext' && !empty($context['fulltext_index']))
+	{
+		checkSession('get');
+
+		$smcFunc['db_query']('', '
+			ALTER TABLE {db_prefix}messages
+			DROP INDEX ' . implode(',
+			DROP INDEX ', $context['fulltext_index']),
+			array(
+				'db_error_skip' => true,
+			)
+		);
+
+		$context['fulltext_index'] = '';
+
+		// Go back to the default search method.
+		if (!empty($modSettings['search_index']) && $modSettings['search_index'] == 'fulltext')
+			updateSettings(array(
+				'search_index' => '',
+			));
+	}
+	elseif (!empty($_REQUEST['sa']) && $_REQUEST['sa'] == 'removecustom')
+	{
+		checkSession('get');
+
+		db_extend();
+		$tables = $smcFunc['db_list_tables'](false, $db_prefix . 'log_search_words');
+		if (!empty($tables))
+		{
+			$smcFunc['db_search_query']('drop_words_table', '
+				DROP TABLE {db_prefix}log_search_words',
+				array(
+				)
+			);
+		}
+
+		updateSettings(array(
+			'search_custom_index_config' => '',
+			'search_custom_index_resume' => '',
+		));
+
+		// Go back to the default search method.
+		if (!empty($modSettings['search_index']) && $modSettings['search_index'] == 'custom')
+			updateSettings(array(
+				'search_index' => '',
+			));
+	}
+	elseif (isset($_POST['save']))
+	{
+		checkSession();
+		updateSettings(array(
+			'search_index' => empty($_POST['search_index']) || (!in_array($_POST['search_index'], array('fulltext', 'custom')) && !isset($context['search_apis'][$_POST['search_index']])) ? '' : $_POST['search_index'],
+			'search_force_index' => isset($_POST['search_force_index']) ? '1' : '0',
+			'search_match_words' => isset($_POST['search_match_words']) ? '1' : '0',
+		));
+	}
+
+	$context['table_info'] = array(
+		'data_length' => 0,
+		'index_length' => 0,
+		'fulltext_length' => 0,
+		'custom_index_length' => 0,
+	);
+
+	// Get some info about the messages table, to show its size and index size.
+	if ($db_type == 'mysql')
+	{
+		if (preg_match('~^`(.+?)`\.(.+?)$~', $db_prefix, $match) !== 0)
+			$request = $smcFunc['db_query']('', '
+				SHOW TABLE STATUS
+				FROM {string:database_name}
+				LIKE {string:table_name}',
+				array(
+					'database_name' => '`' . strtr($match[1], array('`' => '')) . '`',
+					'table_name' => str_replace('_', '\_', $match[2]) . 'messages',
+				)
+			);
+		else
+			$request = $smcFunc['db_query']('', '
+				SHOW TABLE STATUS
+				LIKE {string:table_name}',
+				array(
+					'table_name' => str_replace('_', '\_', $db_prefix) . 'messages',
+				)
+			);
+		if ($request !== false && $smcFunc['db_num_rows']($request) == 1)
+		{
+			// Only do this if the user has permission to execute this query.
+			$row = $smcFunc['db_fetch_assoc']($request);
+			$context['table_info']['data_length'] = $row['Data_length'];
+			$context['table_info']['index_length'] = $row['Index_length'];
+			$context['table_info']['fulltext_length'] = $row['Index_length'];
+			$smcFunc['db_free_result']($request);
+		}
+
+		// Now check the custom index table, if it exists at all.
+		if (preg_match('~^`(.+?)`\.(.+?)$~', $db_prefix, $match) !== 0)
+			$request = $smcFunc['db_query']('', '
+				SHOW TABLE STATUS
+				FROM {string:database_name}
+				LIKE {string:table_name}',
+				array(
+					'database_name' => '`' . strtr($match[1], array('`' => '')) . '`',
+					'table_name' => str_replace('_', '\_', $match[2]) . 'log_search_words',
+				)
+			);
+		else
+			$request = $smcFunc['db_query']('', '
+				SHOW TABLE STATUS
+				LIKE {string:table_name}',
+				array(
+					'table_name' => str_replace('_', '\_', $db_prefix) . 'log_search_words',
+				)
+			);
+		if ($request !== false && $smcFunc['db_num_rows']($request) == 1)
+		{
+			// Only do this if the user has permission to execute this query.
+			$row = $smcFunc['db_fetch_assoc']($request);
+			$context['table_info']['index_length'] += $row['Data_length'] + $row['Index_length'];
+			$context['table_info']['custom_index_length'] = $row['Data_length'] + $row['Index_length'];
+			$smcFunc['db_free_result']($request);
+		}
+	}
+	elseif ($db_type == 'postgresql')
+	{
+		// In order to report the sizes correctly we need to perform vacuum (optimize) on the tables we will be using.
+		db_extend();
+		$temp_tables = $smcFunc['db_list_tables']();
+		foreach ($temp_tables as $table)
+			if ($table == $db_prefix. 'messages' || $table == $db_prefix. 'log_search_words')
+				$smcFunc['db_optimize_table']($table);
+
+		// PostGreSql has some hidden sizes.
+		$request = $smcFunc['db_query']('', '
+			SELECT relname, relpages * 8 *1024 AS "KB" FROM pg_class
+			WHERE relname = {string:messages} OR relname = {string:log_search_words}
+			ORDER BY relpages DESC',
+			array(
+				'messages' => $db_prefix. 'messages',
+				'log_search_words' => $db_prefix. 'log_search_words',
+			)
+		);
+
+		if ($request !== false && $smcFunc['db_num_rows']($request) > 0)
+		{
+			while ($row = $smcFunc['db_fetch_assoc']($request))
+			{
+				if ($row['relname'] == $db_prefix . 'messages')
+				{
+					$context['table_info']['data_length'] = (int) $row['KB'];
+					$context['table_info']['index_length'] = (int) $row['KB'];
+					// Doesn't support fulltext
+					$context['table_info']['fulltext_length'] = $txt['not_applicable'];
+				}
+				elseif ($row['relname'] == $db_prefix. 'log_search_words')
+				{
+					$context['table_info']['index_length'] = (int) $row['KB'];
+					$context['table_info']['custom_index_length'] = (int) $row['KB'];
+				}
+			}
+			$smcFunc['db_free_result']($request);
+		}
+		else
+			// Didn't work for some reason...
+			$context['table_info'] = array(
+				'data_length' => $txt['not_applicable'],
+				'index_length' => $txt['not_applicable'],
+				'fulltext_length' => $txt['not_applicable'],
+				'custom_index_length' => $txt['not_applicable'],
+			);
+	}
+	else
+		$context['table_info'] = array(
+			'data_length' => $txt['not_applicable'],
+			'index_length' => $txt['not_applicable'],
+			'fulltext_length' => $txt['not_applicable'],
+			'custom_index_length' => $txt['not_applicable'],
+		);
+
+	// Format the data and index length in kilobytes.
+	foreach ($context['table_info'] as $type => $size)
+	{
+		// If it's not numeric then just break.  This database engine doesn't support size.
+		if (!is_numeric($size))
+			break;
+
+		$context['table_info'][$type] = comma_format($context['table_info'][$type] / 1024) . ' ' . $txt['search_method_kilobytes'];
+	}
+
+	$context['custom_index'] = !empty($modSettings['search_custom_index_config']);
+	$context['partial_custom_index'] = !empty($modSettings['search_custom_index_resume']) && empty($modSettings['search_custom_index_config']);
+	$context['double_index'] = !empty($context['fulltext_index']) && $context['custom_index'];
+}
+
+function CreateMessageIndex()
+{
+	global $modSettings, $context, $smcFunc, $db_prefix, $txt;
+
+	// Scotty, we need more time...
+	@set_time_limit(600);
+	if (function_exists('apache_reset_timeout'))
+		@apache_reset_timeout();
+
+	$context[$context['admin_menu_name']]['current_subsection'] = 'method';
+	$context['page_title'] = $txt['search_index_custom'];
+
+	$messages_per_batch = 50;
+
+	$index_properties = array(
+		2 => array(
+			'column_definition' => 'small',
+			'step_size' => 1000000,
+		),
+		4 => array(
+			'column_definition' => 'medium',
+			'step_size' => 1000000,
+			'max_size' => 16777215,
+		),
+		5 => array(
+			'column_definition' => 'large',
+			'step_size' => 100000000,
+			'max_size' => 2000000000,
+		),
+	);
+
+	if (isset($_REQUEST['resume']) && !empty($modSettings['search_custom_index_resume']))
+	{
+		$context['index_settings'] = unserialize($modSettings['search_custom_index_resume']);
+		$context['start'] = (int) $context['index_settings']['resume_at'];
+		unset($context['index_settings']['resume_at']);
+		$context['step'] = 1;
+	}
+	else
+	{
+		$context['index_settings'] = array(
+			'bytes_per_word' => isset($_REQUEST['bytes_per_word']) && isset($index_properties[$_REQUEST['bytes_per_word']]) ? (int) $_REQUEST['bytes_per_word'] : 2,
+		);
+		$context['start'] = isset($_REQUEST['start']) ? (int) $_REQUEST['start'] : 0;
+		$context['step'] = isset($_REQUEST['step']) ? (int) $_REQUEST['step'] : 0;
+	}
+
+	if ($context['step'] !== 0)
+		checkSession('request');
+
+	// Step 0: let the user determine how they like their index.
+	if ($context['step'] === 0)
+	{
+		$context['sub_template'] = 'create_index';
+	}
+
+	// Step 1: insert all the words.
+	if ($context['step'] === 1)
+	{
+		$context['sub_template'] = 'create_index_progress';
+
+		if ($context['start'] === 0)
+		{
+			db_extend();
+			$tables = $smcFunc['db_list_tables'](false, $db_prefix . 'log_search_words');
+			if (!empty($tables))
+			{
+				$smcFunc['db_search_query']('drop_words_table', '
+					DROP TABLE {db_prefix}log_search_words',
+					array(
+					)
+				);
+			}
+
+			$smcFunc['db_create_word_search']($index_properties[$context['index_settings']['bytes_per_word']]['column_definition']);
+
+			// Temporarily switch back to not using a search index.
+			if (!empty($modSettings['search_index']) && $modSettings['search_index'] == 'custom')
+				updateSettings(array('search_index' => ''));
+
+			// Don't let simultanious processes be updating the search index.
+			if (!empty($modSettings['search_custom_index_config']))
+				updateSettings(array('search_custom_index_config' => ''));
+		}
+
+		$num_messages = array(
+			'done' => 0,
+			'todo' => 0,
+		);
+
+		$request = $smcFunc['db_query']('', '
+			SELECT id_msg >= {int:starting_id} AS todo, COUNT(*) AS num_messages
+			FROM {db_prefix}messages
+			GROUP BY todo',
+			array(
+				'starting_id' => $context['start'],
+			)
+		);
+		while ($row = $smcFunc['db_fetch_assoc']($request))
+			$num_messages[empty($row['todo']) ? 'done' : 'todo'] = $row['num_messages'];
+
+		if (empty($num_messages['todo']))
+		{
+			$context['step'] = 2;
+			$context['percentage'] = 80;
+			$context['start'] = 0;
+		}
+		else
+		{
+			// Number of seconds before the next step.
+			$stop = time() + 3;
+			while (time() < $stop)
+			{
+				$inserts = array();
+				$request = $smcFunc['db_query']('', '
+					SELECT id_msg, body
+					FROM {db_prefix}messages
+					WHERE id_msg BETWEEN {int:starting_id} AND {int:ending_id}
+					LIMIT {int:limit}',
+					array(
+						'starting_id' => $context['start'],
+						'ending_id' => $context['start'] + $messages_per_batch - 1,
+						'limit' => $messages_per_batch,
+					)
+				);
+				$forced_break = false;
+				$number_processed = 0;
+				while ($row = $smcFunc['db_fetch_assoc']($request))
+				{
+					// In theory it's possible for one of these to take friggin ages so add more timeout protection.
+					if ($stop < time())
+					{
+						$forced_break = true;
+						break;
+					}
+
+					$number_processed++;
+					foreach (text2words($row['body'], $context['index_settings']['bytes_per_word'], true) as $id_word)
+					{
+						$inserts[] = array($id_word, $row['id_msg']);
+					}
+				}
+				$num_messages['done'] += $number_processed;
+				$num_messages['todo'] -= $number_processed;
+				$smcFunc['db_free_result']($request);
+
+				$context['start'] += $forced_break ? $number_processed : $messages_per_batch;
+
+				if (!empty($inserts))
+					$smcFunc['db_insert']('ignore',
+						'{db_prefix}log_search_words',
+						array('id_word' => 'int', 'id_msg' => 'int'),
+						$inserts,
+						array('id_word', 'id_msg')
+					);
+				if ($num_messages['todo'] === 0)
+				{
+					$context['step'] = 2;
+					$context['start'] = 0;
+					break;
+				}
+				else
+					updateSettings(array('search_custom_index_resume' => serialize(array_merge($context['index_settings'], array('resume_at' => $context['start'])))));
+			}
+
+			// Since there are still two steps to go, 90% is the maximum here.
+			$context['percentage'] = round($num_messages['done'] / ($num_messages['done'] + $num_messages['todo']), 3) * 80;
+		}
+	}
+
+	// Step 2: removing the words that occur too often and are of no use.
+	elseif ($context['step'] === 2)
+	{
+		if ($context['index_settings']['bytes_per_word'] < 4)
+			$context['step'] = 3;
+		else
+		{
+			$stop_words = $context['start'] === 0 || empty($modSettings['search_stopwords']) ? array() : explode(',', $modSettings['search_stopwords']);
+			$stop = time() + 3;
+			$context['sub_template'] = 'create_index_progress';
+			$max_messages = ceil(60 * $modSettings['totalMessages'] / 100);
+
+			while (time() < $stop)
+			{
+				$request = $smcFunc['db_query']('', '
+					SELECT id_word, COUNT(id_word) AS num_words
+					FROM {db_prefix}log_search_words
+					WHERE id_word BETWEEN {int:starting_id} AND {int:ending_id}
+					GROUP BY id_word
+					HAVING COUNT(id_word) > {int:minimum_messages}',
+					array(
+						'starting_id' => $context['start'],
+						'ending_id' => $context['start'] + $index_properties[$context['index_settings']['bytes_per_word']]['step_size'] - 1,
+						'minimum_messages' => $max_messages,
+					)
+				);
+				while ($row = $smcFunc['db_fetch_assoc']($request))
+					$stop_words[] = $row['id_word'];
+				$smcFunc['db_free_result']($request);
+
+				updateSettings(array('search_stopwords' => implode(',', $stop_words)));
+
+				if (!empty($stop_words))
+					$smcFunc['db_query']('', '
+						DELETE FROM {db_prefix}log_search_words
+						WHERE id_word in ({array_int:stop_words})',
+						array(
+							'stop_words' => $stop_words,
+						)
+					);
+
+				$context['start'] += $index_properties[$context['index_settings']['bytes_per_word']]['step_size'];
+				if ($context['start'] > $index_properties[$context['index_settings']['bytes_per_word']]['max_size'])
+				{
+					$context['step'] = 3;
+					break;
+				}
+			}
+			$context['percentage'] = 80 + round($context['start'] / $index_properties[$context['index_settings']['bytes_per_word']]['max_size'], 3) * 20;
+		}
+	}
+
+	// Step 3: remove words not distinctive enough.
+	if ($context['step'] === 3)
+	{
+		$context['sub_template'] = 'create_index_done';
+
+		updateSettings(array('search_index' => 'custom', 'search_custom_index_config' => serialize($context['index_settings'])));
+		$smcFunc['db_query']('', '
+			DELETE FROM {db_prefix}settings
+			WHERE variable = {string:search_custom_index_resume}',
+			array(
+				'search_custom_index_resume' => 'search_custom_index_resume',
+			)
+		);
+	}
+}
+
+// Get the installed APIs.
+function loadSearchAPIs()
+{
+	global $sourcedir, $txt;
+
+	$apis = array();
+	if ($dh = opendir($sourcedir))
+	{
+		while (($file = readdir($dh)) !== false)
+		{
+			if (is_file($sourcedir . '/' . $file) && preg_match('~SearchAPI-([A-Za-z\d_]+)\.php~', $file, $matches))
+			{
+				// Check this is definitely a valid API!
+				$fp = fopen($sourcedir . '/' . $file, 'rb');
+				$header = fread($fp, 4096);
+				fclose($fp);
+
+				if (strpos($header, '* SearchAPI-' . $matches[1] . '.php') !== false)
+				{
+					loadClassFile($file);
+
+					$index_name = strtolower($matches[1]);
+					$search_class_name = $index_name . '_search';
+					$searchAPI = new $search_class_name();
+
+					// No Support?  NEXT!
+					if (!$searchAPI->is_supported)
+						continue;
+
+					$apis[$index_name] = array(
+						'filename' => $file,
+						'setting_index' => $index_name,
+						'has_template' => in_array($index_name, array('custom', 'fulltext', 'standard')),
+						'label' => $index_name && isset($txt['search_index_' . $index_name]) ? $txt['search_index_' . $index_name] : '',
+						'desc' => $index_name && isset($txt['search_index_' . $index_name . '_desc']) ? $txt['search_index_' . $index_name . '_desc'] : '',
+					);
+				}
+			}
+		}
+	}
+	closedir($dh);
+
+	return $apis;
+}
+
+?>
\ No newline at end of file