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SearchDatabase.php
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SearchDatabase.php
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<?php
/**
* phpMyFAQ database based search classes.
*
* This Source Code Form is subject to the terms of the Mozilla Public License,
* v. 2.0. If a copy of the MPL was not distributed with this file, You can
* obtain one at http://mozilla.org/MPL/2.0/.
*
* @package phpMyFAQ
* @author Thorsten Rinne <thorsten@phpmyfaq.de>
* @copyright 2010-2022 phpMyFAQ Team
* @license http://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0
* @link https://www.phpmyfaq.de
* @since 2010-06-06
*/
namespace phpMyFAQ\Search;
use phpMyFAQ\Configuration;
use phpMyFAQ\Strings;
use stdClass;
/**
* Class SearchDatabase
*
* @package phpMyFAQ\Search
*/
class SearchDatabase extends AbstractSearch implements SearchInterface
{
/**
* Searching database table.
*
* @var string
*/
protected $table = '';
/**
* Joined searching database table.
*
* @var string
*/
protected $joinedTable = '';
/**
* Columns for the result set.
*
* @var string[]
*/
protected $resultColumns = [];
/**
* Columns for the joined table.
*
* @var string[]
*/
protected $joinedColumns = [];
/**
* Matching columns for the search.
*
* @var string[]
*/
protected $matchingColumns = [];
/**
* Conditions columns with their values.
*
* @var array<string, array<int>|string>
*/
protected $conditions = [];
/**
* Flag if database supports search relevance.
*
* @var bool
*/
protected $relevanceSupport = false;
/**
* Constructor.
*
* @param Configuration $config
*/
public function __construct(Configuration $config)
{
parent::__construct($config);
}
/**
* Prepares the search and executes it.
*
* @param string $searchTerm Search term
* @return mixed
*/
public function search(string $searchTerm)
{
$query = sprintf(
'
SELECT
%s
FROM
%s %s %s
WHERE
%s = %d',
$this->getResultColumns(),
$this->getTable(),
$this->getJoinedTable(),
$this->getJoinedColumns(),
$this->getMatchingColumns(),
$searchTerm
);
$this->resultSet = $this->config->getDb()->query($query);
return $this->resultSet;
}
/**
* Returns the part of the SQL query with the columns for the result set.
*
* @return string
*/
public function getResultColumns(): string
{
$resultColumns = '';
foreach ($this->resultColumns as $column) {
if (empty($resultColumns)) {
$resultColumns = $column;
} else {
$resultColumns .= ', ' . $column;
}
}
return $resultColumns;
}
/**
* Sets the part of the SQL query with the columns for the result set.
*
* @param string[] $columns Array of columns
*
* @return SearchDatabase
*/
public function setResultColumns(array $columns): SearchDatabase
{
$this->resultColumns = $columns;
return $this;
}
/**
* Returns the search table.
*
* @return string
*/
public function getTable(): string
{
return $this->table;
}
/**
* Sets search table.
*
* @param string $table Table where search should be performed
*
* @return SearchDatabase
*/
public function setTable($table): SearchDatabase
{
$this->table = $table;
return $this;
}
/**
* Returns the joined table.
*
* @return string
*/
public function getJoinedTable(): string
{
if (empty($this->joinedTable)) {
return '';
} else {
return ' LEFT JOIN ' . $this->joinedTable . ' ON ';
}
}
/**
* Sets joined search table.
*
* @param string $joinedTable Joined table where search should be performed
*
* @return SearchDatabase
*/
public function setJoinedTable($joinedTable = ''): SearchDatabase
{
$this->joinedTable = $joinedTable;
return $this;
}
/**
* Returns the part of the SQL query with the columns for the join.
*
* @return string
*/
public function getJoinedColumns(): string
{
$joinedColumns = '';
foreach ($this->joinedColumns as $column) {
$joinedColumns .= $column . ' AND ';
}
return Strings::substr($joinedColumns, 0, -4);
}
/**
* Sets the part of the SQL query with the columns for the join.
*
* @param string[] $joinedColumns Array of columns
*
* @return SearchDatabase
*/
public function setJoinedColumns(array $joinedColumns): SearchDatabase
{
$this->joinedColumns = $joinedColumns;
return $this;
}
/**
* Returns the part of the SQL query with the matching columns.
*
* @return string
*/
public function getMatchingColumns(): string
{
return implode(', ', $this->matchingColumns);
}
/**
* Sets the part of the SQL query with the matching columns.
*
* @param string[] $matchingColumns Array of columns
*
* @return SearchDatabase
*/
public function setMatchingColumns(array $matchingColumns): SearchDatabase
{
$this->matchingColumns = $matchingColumns;
return $this;
}
/**
* Returns the part of the SQL query with the conditions.
*
* @return string
*/
public function getConditions(): string
{
$conditions = '';
if (count($this->conditions)) {
foreach ($this->conditions as $column => $value) {
if (is_array($value)) {
$conditions .= ' AND ' . $column . ' IN (' . implode(', ', $value) . ')';
} else {
$conditions .= ' AND ' . $column . ' = ' . $value;
}
}
}
return $conditions;
}
/**
* Sets the part of the SQL query with the conditions.
*
* @param array<string, array<int>|string> $conditions Array of columns
*
* @return SearchDatabase
*/
public function setConditions(array $conditions): SearchDatabase
{
$this->conditions = $conditions;
return $this;
}
/**
* Creates the part for the WHERE clause.
*
* @param string $searchTerm Search term
*
* @return string
*/
public function getMatchClause($searchTerm = ''): string
{
$keys = Strings::preg_split("/\s+/", $searchTerm);
$numKeys = count($keys);
$numMatch = count($this->matchingColumns);
$where = '';
for ($i = 0; $i < $numKeys; ++$i) {
if (strlen($where) != 0) {
$where = $where . ' OR';
}
$where = $where . ' (';
for ($j = 0; $j < $numMatch; ++$j) {
if ($j != 0) {
$where = $where . ' OR ';
}
$where = sprintf(
"%s%s LIKE '%%%s%%'",
$where,
$this->matchingColumns[$j],
$this->config->getDb()->escape($keys[$i])
);
}
$where .= ')';
}
return $where;
}
/**
* Disables relevance support if we don't need it even if the database
* supports it.
*/
public function disableRelevance(): void
{
$this->relevanceSupport = false;
}
}