100 lines
2.4 KiB
PHP
100 lines
2.4 KiB
PHP
<?php declare(strict_types=1);
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/**
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* Query
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*
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* SQL Query Builder / Database Abstraction Layer
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*
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* PHP version 8.1
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*
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* @package Query
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* @author Timothy J. Warren <tim@timshomepage.net>
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* @copyright 2012 - 2022 Timothy J. Warren
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link https://git.timshomepage.net/aviat/Query
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* @version 4.0.0
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*/
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namespace Query\Drivers;
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/**
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* Abstract class defining database / table creation methods
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*/
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abstract class AbstractUtil {
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/**
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* Save a reference to the connection object for later use
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*/
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public function __construct(private readonly DriverInterface $connection)
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{
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}
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/**
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* Get the driver object for the current connection
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*/
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public function getDriver(): DriverInterface
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{
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return $this->connection;
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}
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/**
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* Convenience public function to generate sql for creating a db table
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*/
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public function createTable(string $name, array $fields, array $constraints=[], bool $ifNotExists=TRUE): string
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{
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$existsStr = $ifNotExists ? ' IF NOT EXISTS ' : ' ';
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// Reorganize into an array indexed with column information
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// Eg $columnArray[$colname] = [
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// 'type' => ...,
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// 'constraint' => ...,
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// 'index' => ...,
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// ]
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$columnArray = \arrayZipper([
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'type' => $fields,
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'constraint' => $constraints
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]);
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// Join column definitions together
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$columns = [];
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foreach($columnArray as $n => $props)
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{
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$str = $this->getDriver()->quoteIdent($n);
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$str .= isset($props['type']) ? " {$props['type']}" : '';
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$str .= isset($props['constraint']) ? " {$props['constraint']}" : '';
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$columns[] = $str;
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}
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// Generate the sql for the creation of the table
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$sql = 'CREATE TABLE'.$existsStr.$this->getDriver()->quoteTable($name).' (';
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$sql .= implode(', ', $columns);
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$sql .= ')';
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return $sql;
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}
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/**
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* Drop the selected table
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*/
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public function deleteTable(string $name): string
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{
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return 'DROP TABLE IF EXISTS '.$this->getDriver()->quoteTable($name);
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}
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// --------------------------------------------------------------------------
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// ! Abstract Methods
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// --------------------------------------------------------------------------
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/**
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* Return an SQL file with the database table structure
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*
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* @abstract
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*/
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abstract public function backupStructure(): string;
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/**
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* Return an SQL file with the database data as insert statements
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*
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* @abstract
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*/
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abstract public function backupData(): string;
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} |