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Edit File: DbSearch-postgresql.php

<?php

/**
 * This file contains database functions specific to search related activity.
 *
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines https://www.simplemachines.org
 * @copyright 2023 Simple Machines and individual contributors
 * @license https://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1.4
 */

if (!defined('SMF'))
	die('No direct access...');

/**
 *  Add the file functions to the $smcFunc array.
 */
function db_search_init()
{
	global $smcFunc;

if (!isset($smcFunc['db_search_query']) || $smcFunc['db_search_query'] != 'smf_db_search_query')
		$smcFunc += array(
			'db_search_query' => 'smf_db_search_query',
			'db_search_support' => 'smf_db_search_support',
			'db_create_word_search' => 'smf_db_create_word_search',
			'db_support_ignore' => false,
			'db_search_language' => 'smf_db_search_language',
		);

db_extend();

$smcFunc['db_support_ignore'] = true;
	$smcFunc['db_supports_pcre'] = true;
}

/**
 * This function will tell you whether this database type supports this search type.
 *
 * @param string $search_type The search type
 * @return boolean Whether or not the specified search type is supported by this DB system.
 */
function smf_db_search_support($search_type)
{
	$supported_types = array('custom', 'fulltext');

return in_array($search_type, $supported_types);
}

/**
 * Returns the correct query for this search type.
 *
 * @param string $identifier A query identifier
 * @param string $db_string The query text
 * @param array $db_values An array of values to pass to $smcFunc['db_query']
 * @param resource $connection The current DB connection resource
 * @return resource The query result resource from $smcFunc['db_query']
 */
function smf_db_search_query($identifier, $db_string, $db_values = array(), $connection = null)
{
	global $smcFunc;

$replacements = array(
		'create_tmp_log_search_topics' => array(
			'~ENGINE=MEMORY~i' => '',
		),
		'create_tmp_log_search_messages' => array(
			'~ENGINE=MEMORY~i' => '',
		),
		'insert_into_log_messages_fulltext' => array(
			'/NOT\sLIKE/' => 'NOT ILIKE',
			'/\bLIKE\b/' => 'ILIKE',
			'/NOT RLIKE/' => '!~*',
			'/RLIKE/' => '~*',
		),
		'insert_log_search_results_subject' => array(
			'/NOT\sLIKE/' => 'NOT ILIKE',
			'/\bLIKE\b/' => 'ILIKE',
			'/NOT RLIKE/' => '!~*',
			'/RLIKE/' => '~*',
		),
		'insert_log_search_topics' => array(
			'/NOT\sLIKE/' => 'NOT ILIKE',
			'/\bLIKE\b/' => 'ILIKE',
			'/NOT RLIKE/' => '!~*',
			'/RLIKE/' => '~*',
		),
		'insert_log_search_results_no_index' => array(
			'/NOT\sLIKE/' => 'NOT ILIKE',
			'/\bLIKE\b/' => 'ILIKE',
			'/NOT RLIKE/' => '!~*',
			'/RLIKE/' => '~*',
		),
	);

if (isset($replacements[$identifier]))
		$db_string = preg_replace(array_keys($replacements[$identifier]), array_values($replacements[$identifier]), $db_string);
	if (preg_match('~^\s*INSERT\sIGNORE~i', $db_string) != 0)
	{
		$db_string = preg_replace('~^\s*INSERT\sIGNORE~i', 'INSERT', $db_string);
		if ($smcFunc['db_support_ignore'])
		{
			//pg style "INSERT INTO.... ON CONFLICT DO NOTHING"
			$db_string = $db_string . ' ON CONFLICT DO NOTHING';
		}
		else
		{
			// Don't error on multi-insert.
			$db_values['db_error_skip'] = true;
		}
	}

//fix double quotes
	if ($identifier == 'insert_into_log_messages_fulltext')
		$db_string = str_replace('"', "'", $db_string);

$return = $smcFunc['db_query']('', $db_string,
		$db_values, $connection
	);

return $return;
}

/**
 * Highly specific function, to create the custom word index table.
 *
 * @param string $size The column size type (int, mediumint (8), etc.). Not used here.
 */
function smf_db_create_word_search($size)
{
	global $smcFunc;

$size = 'int';

$smcFunc['db_query']('', '
		CREATE TABLE {db_prefix}log_search_words (
			id_word {raw:size} NOT NULL default {string:string_zero},
			id_msg int NOT NULL default {string:string_zero},
			PRIMARY KEY (id_word, id_msg)
		)',
		array(
			'size' => $size,
			'string_zero' => '0',
		)
	);
}

/**
 * Return the language for the textsearch index
 */
function smf_db_search_language()
{
	global $smcFunc, $modSettings;

$language_ftx = 'english';

if (!empty($modSettings['search_language']))
		$language_ftx = $modSettings['search_language'];
	else
	{
		$request = $smcFunc['db_query']('', '
			SELECT cfgname FROM pg_ts_config WHERE oid = current_setting({string:default_language})::regconfig',
			array(
				'default_language' => 'default_text_search_config'
			)
		);

if ($request !== false && $smcFunc['db_num_rows']($request) == 1)
		{
			$row = $smcFunc['db_fetch_assoc']($request);
			$language_ftx = $row['cfgname'];

$smcFunc['db_insert']('replace',
				'{db_prefix}settings',
				array('variable' => 'string', 'value' => 'string'),
				array('search_language', $language_ftx),
				array('variable')
			);
		}
	}

return $language_ftx;
}