Passed
Push — 2.1 ( 4f7222...fd5fab )
by Greg
08:07
created

DB::iLike()   A

Complexity

Conditions 3
Paths 3

Size

Total Lines 11
Code Lines 5

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 3
eloc 5
nc 3
nop 0
dl 0
loc 11
rs 10
c 0
b 0
f 0
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<?php
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/**
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 * webtrees: online genealogy
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 * Copyright (C) 2025 webtrees development team
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, either version 3 of the License, or
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 * (at your option) any later version.
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 * GNU General Public License for more details.
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 * You should have received a copy of the GNU General Public License
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 * along with this program. If not, see <https://www.gnu.org/licenses/>.
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 */
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declare(strict_types=1);
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namespace Fisharebest\Webtrees;
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use Closure;
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use Illuminate\Database\Capsule\Manager;
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use Illuminate\Database\Query\Builder;
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use Illuminate\Database\Query\Expression;
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use PDO;
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use RuntimeException;
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/**
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 * Database abstraction
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 */
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class DB extends Manager
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{
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    // Supported drivers
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    public const MYSQL      = 'mysql';
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    public const POSTGRES   = 'pgsql';
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    public const SQLITE     = 'sqlite';
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    public const SQL_SERVER = 'sqlsrv';
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    private const COLLATION_ASCII = [
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        self::MYSQL      => 'ascii_bin',
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        self::POSTGRES   => 'C',
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        self::SQLITE     => 'BINARY',
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        self::SQL_SERVER => 'Latin1_General_Bin',
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    ];
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    private const COLLATION_UTF8 = [
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        self::MYSQL      => 'utf8mb4_unicode_ci',
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        self::POSTGRES   => 'und-x-icu',
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        self::SQLITE     => 'NOCASE',
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        self::SQL_SERVER => 'utf8_CI_AI',
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    ];
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    private const REGEX_OPERATOR = [
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        self::MYSQL      => 'REGEXP',
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        self::POSTGRES   => '~',
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        self::SQLITE     => 'REGEXP',
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        self::SQL_SERVER => 'REGEXP',
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    ];
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    private const DRIVER_INITIALIZATION = [
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        self::MYSQL      => "SET NAMES utf8mb4, sql_mode := 'ANSI,STRICT_ALL_TABLES', TIME_ZONE := '+00:00', SQL_BIG_SELECTS := 1, GROUP_CONCAT_MAX_LEN := 1048576",
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        self::POSTGRES   => '',
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        self::SQLITE     => 'PRAGMA foreign_keys = ON',
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        self::SQL_SERVER => 'SET language us_english', // For timestamp columns
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    ];
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    public static function driverName(): string
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    {
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        return self::pdo()->getAttribute(PDO::ATTR_DRIVER_NAME);
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    }
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    /**
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     * @return int|false
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     */
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    public static function exec(string $sql)
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    {
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        return self::pdo()->exec($sql);
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    }
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    public static function lastInsertId(): int
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    {
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        $return = self::pdo()->lastInsertId();
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        if ($return === false) {
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            throw new RuntimeException('Unable to retrieve last insert ID');
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        }
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        // All IDs are integers in our schema.
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        return (int) $return;
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    }
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    private static function pdo(): PDO
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    {
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        return parent::connection()->getPdo();
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    }
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    public static function prefix(string $identifier): string
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    {
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        return parent::connection()->getTablePrefix() . $identifier;
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    }
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    /**
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     * SQL-Server needs to be told that we are going to insert into an identity column.
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     *
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     * @param Closure(): void $callback
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     */
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    public static function identityInsert(string $table, Closure $callback): void
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    {
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        if (self::driverName() === self::SQL_SERVER) {
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            self::exec('SET IDENTITY_INSERT [' . self::prefix($table) . '] ON');
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        }
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        $callback();
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        if (self::driverName() === self::SQL_SERVER) {
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            self::exec('SET IDENTITY_INSERT [' . self::prefix($table) . '] OFF');
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        }
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    }
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    public static function rollBack(): void
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    {
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        parent::connection()->rollBack();
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    }
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    /**
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     * @internal
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     */
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    public static function iLike(): string
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    {
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        if (self::driverName() === self::POSTGRES) {
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            return 'ILIKE';
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        }
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        if (self::driverName() === self::SQL_SERVER) {
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            return 'COLLATE SQL_UTF8_General_CI_AI LIKE';
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        }
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        return 'LIKE';
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    }
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    /**
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     * @internal
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     */
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    public static function groupConcat(string $column): string
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    {
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        switch (self::driverName()) {
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            case self::POSTGRES:
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            case self::SQL_SERVER:
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                return 'STRING_AGG(' . $column . ", ',')";
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            case self::MYSQL:
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            case self::SQLITE:
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            default:
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                return 'GROUP_CONCAT(' . $column . ')';
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        }
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    }
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    /**
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     * @return Expression
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     */
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    public static function binaryColumn(string $column, ?string $alias = null): Expression
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    {
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        if (self::driverName() === self::MYSQL) {
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            $sql = 'CAST(' . $column . ' AS binary)';
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        } else {
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            $sql = $column;
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        }
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        if ($alias !== null) {
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            $sql .= ' AS ' . $alias;
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        }
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        return new Expression($sql);
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    }
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    public static function regexOperator(): string
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    {
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        return self::REGEX_OPERATOR[self::driverName()];
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    }
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    /**
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     * PHPSTAN can't detect the magic methods in the parent class.
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     */
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    public static function query(): Builder
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    {
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        return parent::connection()->query();
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    }
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}
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