Source of file Util.php

<?php declare(strict_types=1);

/**

 * Query

 *

 * SQL Query Builder / Database Abstraction Layer

 *

 * PHP version 7.4

 *

 * @package     Query

 * @author      Timothy J. Warren <tim@timshomepage.net>

 * @copyright   2012 - 2020 Timothy J. Warren

 * @license     http://www.opensource.org/licenses/mit-license.html  MIT License

 * @link        https://git.timshomepage.net/aviat/Query

 * @version     3.0.0

 */

namespace Query\Drivers\Sqlite;

use PDO;

use Query\Drivers\AbstractUtil;

/**

 * SQLite-specific backup, import and creation methods

 */

class Util extends AbstractUtil {

	/**

	 * Create an SQL backup file for the current database's data

	 *

	 * @param array $excluded

	 * @return string

	 */

	public function backupData(array $excluded=[]): string

	{

		// Get a list of all the objects

		$sql = 'SELECT DISTINCT "name"

				FROM "sqlite_master"

				WHERE "type"=\'table\'';

		if( ! empty($excluded))

		{

			$sql .= " AND \"name\" NOT IN('".implode("','", $excluded)."')";

		}

		$res = $this->getDriver()->query($sql);

		$result = $res->fetchAll(PDO::FETCH_ASSOC);

		unset($res);

		$outputSql = '';

		// Get the data for each object

		foreach($result as $r)

		{

			$sql = 'SELECT * FROM "'.$r['name'].'"';

			$res = $this->getDriver()->query($sql);

			$objRes = $res->fetchAll(PDO::FETCH_ASSOC);

			unset($res);

			// If the row is empty, continue

			if (empty($objRes))

			{

				continue;

			}

			// Nab the column names by getting the keys of the first row

			$columns = array_keys(current($objRes));

			$insertRows = [];

			// Create the insert statements

			foreach($objRes as $row)

			{

				$row = array_values($row);

				// Quote values as needed by type

				foreach ($row as $i => $_)

				{

					$row[$i] = (is_numeric($row[$i]))

						? $row[$i]

						: $this->getDriver()->quote($row[$i]);

				}

				$rowString = 'INSERT INTO "'.$r['name'].'" ("'.implode('","', $columns).'") VALUES ('.implode(',', $row).');';

				unset($row);

				$insertRows[] = $rowString;

			}

			unset($objRes);

			$outputSql .= "\n\n".implode("\n", $insertRows);

		}

		return $outputSql;

	}

	/**

	 * Create an SQL backup file for the current database's structure

	 *

	 * @return string

	 */

	public function backupStructure(): string

	{

		// Fairly easy for SQLite...just query the master table

		$sql = 'SELECT "sql" FROM "sqlite_master"';

		$res = $this->getDriver()->query($sql);

		$result = $res->fetchAll(PDO::FETCH_ASSOC);

		$sqlArray = [];

		foreach($result as $r)

		{

			$sqlArray[] = $r['sql'];

		}

		return implode(";\n", $sqlArray) . ';';

	}

}