63e6410728
- Changes static methods to instance methods - Extract response handling to the controllers - Add unit tests for the DbTableExists class - Remove the AbstractController::hasDatabase() method Signed-off-by: Maurício Meneghini Fauth <mauricio@fauth.dev>
92 lines
2.6 KiB
PHP
92 lines
2.6 KiB
PHP
<?php
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declare(strict_types=1);
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namespace PhpMyAdmin;
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use PhpMyAdmin\Identifiers\DatabaseName;
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use PhpMyAdmin\Identifiers\TableName;
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use function in_array;
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use function sprintf;
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use function str_starts_with;
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final class DbTableExists
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{
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/** @psalm-var list<non-empty-string> */
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private array $databases = [];
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/** @psalm-var list<non-empty-string> */
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private array $tables = [];
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public function __construct(private readonly DatabaseInterface $dbi)
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{
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}
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public function hasDatabase(DatabaseName $databaseName): bool
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{
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if (in_array($databaseName->getName(), $this->databases, true)) {
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return true;
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}
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if ($this->dbi->selectDb($databaseName) || $this->hasCommandsOutOfSyncError()) {
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$this->databases[] = $databaseName->getName();
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return true;
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}
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return false;
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}
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public function hasTable(DatabaseName $database, TableName $table): bool
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{
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if (in_array($database->getName() . '.' . $table->getName(), $this->tables, true)) {
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return true;
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}
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if (
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$this->hasCachedTableContent($database, $table)
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|| $this->isPermanentTable($table)
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|| $this->isTemporaryTable($table)
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) {
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$this->tables[] = $database->getName() . '.' . $table->getName();
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return true;
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}
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return false;
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}
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/**
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* This "Commands out of sync" 2014 error may happen, for example after calling a MySQL procedure;
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* at this point we can't select the db, but it's not necessarily wrong.
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*
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* @see https://dev.mysql.com/doc/mysql-errors/8.0/en/client-error-reference.html#error_cr_commands_out_of_sync
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*/
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private function hasCommandsOutOfSyncError(): bool
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{
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return str_starts_with($this->dbi->getError(), '#2014 ');
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}
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private function hasCachedTableContent(DatabaseName $database, TableName $table): bool
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{
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return (bool) $this->dbi->getCache()->getCachedTableContent([$database->getName(), $table->getName()]);
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}
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private function isPermanentTable(TableName $table): bool
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{
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$result = $this->dbi->tryQuery(sprintf('SHOW TABLES LIKE %s;', $this->dbi->quoteString($table->getName())));
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return $result !== false && $result->numRows() > 0;
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}
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/**
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* SHOW TABLES doesn't show temporary tables, so try select
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* as it can happen just in case temporary table. It should be fast.
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*/
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private function isTemporaryTable(TableName $table): bool
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{
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return $this->dbi->tryQuery(sprintf('SELECT 1 FROM %s LIMIT 1;', Util::backquote($table))) !== false;
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}
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}
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