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74 lines
2.5 KiB
PHP
74 lines
2.5 KiB
PHP
<?php
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namespace App\Support;
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use Illuminate\Support\Facades\DB;
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class SqliteCompat
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{
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public static function statement(string $sql): bool
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{
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$connection = DB::connection();
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$driver = $connection->getDriverName();
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if ($driver !== 'sqlite') {
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return $connection->statement($sql);
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}
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$trimmed = ltrim($sql);
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if (stripos($trimmed, 'ALTER TABLE') === 0) {
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// SQLite cannot add primary keys or change auto_increment via ALTER.
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return true;
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}
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if (stripos($trimmed, 'CREATE TABLE') === 0) {
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$sql = self::normalizeCreateTable($sql);
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} else {
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$sql = self::normalizeGeneric($sql);
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}
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return $connection->statement($sql);
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}
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private static function normalizeCreateTable(string $sql): string
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{
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$sql = self::normalizeGeneric($sql);
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// Promote `id` column to PRIMARY KEY if not already.
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$sql = preg_replace(
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'/`id`\\s+integer\\s+NOT\\s*NULL/i',
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'`id` integer PRIMARY KEY AUTOINCREMENT NOT NULL',
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$sql,
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1
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);
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return $sql;
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}
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private static function normalizeGeneric(string $sql): string
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{
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// Remove engine/charset/collation.
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$sql = preg_replace('/\\)\\s*ENGINE=.*$/is', ')', $sql);
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$sql = preg_replace('/\\)\\s*DEFAULT CHARSET=.*$/is', ')', $sql);
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$sql = preg_replace('/\\)\\s*CHARSET=.*$/is', ')', $sql);
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$sql = preg_replace('/\\)\\s*COLLATE=.*$/is', ')', $sql);
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// Replace MySQL-specific types.
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$sql = preg_replace('/int\\(\\d+\\)\\s+unsigned/i', 'integer', $sql);
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$sql = preg_replace('/int\\(\\d+\\)/i', 'integer', $sql);
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$sql = preg_replace('/\\bint\\b/i', 'integer', $sql);
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$sql = preg_replace('/smallint\\(\\d+\\)/i', 'integer', $sql);
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$sql = preg_replace('/tinyint\\(\\d+\\)/i', 'integer', $sql);
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$sql = preg_replace('/decimal\\(\\d+\\s*,\\s*\\d+\\)/i', 'numeric', $sql);
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$sql = preg_replace('/enum\\s*\\([^\\)]*\\)/i', 'text', $sql);
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$sql = preg_replace('/\\bunsigned\\b/i', '', $sql);
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$sql = preg_replace('/\\s+COMMENT\\s+\'[^\']*\'/i', '', $sql);
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$sql = preg_replace('/\\s+ON\\s+UPDATE\\s+CURRENT_TIMESTAMP/i', '', $sql);
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$sql = preg_replace('/\\s+COLLATE\\s+\\w+/i', '', $sql);
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$sql = preg_replace('/\\s+CHARACTER\\s+SET\\s+\\w+/i', '', $sql);
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$sql = preg_replace('/set\\s*\\([^\\)]*\\)/i', 'text', $sql);
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return rtrim($sql, " \t\n\r\0\x0B;");
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}
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}
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