phpbu\App\Backup\Source\Mysqldump

Complexity

Total Complexity

26

Size/Duplication

Total Lines	356
Duplicated Lines	1.97 %

Coupling/Cohesion

Components	1
Dependencies	13

Test Coverage

Coverage

100%

Importance

Changes

0

8 Methods

Rating	Name	Duplication	Size	Complexity
A	setup()	0	26	3
A	setupSourceData()	7	7	1
A	backup()	0	19	4
B	restore()	0	32	8
A	createExecutable()	0	28	2
A	createStatus()	0	16	3
A	isHandlingCompression()	0	4	3
A	getDumpTarget()	0	4	2

<?php
namespace phpbu\App\Backup\Source;

use phpbu\App\Backup\Restore\Plan;
use phpbu\App\Backup\Target;
use phpbu\App\Cli\Executable;
use phpbu\App\Exception;
use phpbu\App\Result;
use phpbu\App\Util;

/**
 * Mysqldump source class.
 *
 * @package    phpbu
 * @subpackage Backup
 * @author     Sebastian Feldmann <sebastian@phpbu.de>
 * @copyright  Sebastian Feldmann <sebastian@phpbu.de>
 * @license    https://opensource.org/licenses/MIT The MIT License (MIT)
 * @link       http://phpbu.de/
 * @since      Class available since Release 1.0.0
 */
class Mysqldump extends SimulatorExecutable implements Simulator, Restorable
{
    /**
     * Path to executable.
     *
     * @var string
     */
    private $pathToMysqldump;

    /**
     * Host to connect to
     * --host <hostname>
     *
     * @var string
     */
    private $host;

    /**
     * Port to connect to
     * --port <port>
     *
     * @var int
     */
    private $port;

    /**
     * Port to connect to
     * --protocol <TCP|SOCKET|PIPE|MEMORY>
     *
     * @var string
     */
    private $protocol;

    /**
     * User to connect with
     * --user <username>
     *
     * @var string
     */
    private $user;

    /**
     * Password to authenticate with
     * --password <password>
     *
     * @var string
     */
    private $password;

    /**
     * List of tables to backup
     * --tables array of strings
     *
     * @var array
     */
    private $tables;

    /**
     * List of databases to backup
     * --databases array of strings
     *
     * @var array
     */
    private $databases;

    /**
     * List of tables to ignore
     *
     * @var array
     */
    private $ignoreTables;

    /**
     * List of tables where only the table structure is stored
     *
     * @var array
     */
    private $structureOnly;

    /**
     * Table separated data files
     * --tab
     *
     * @var boolean
     */
    private $filePerTable;

    /**
     * Use mysqldump quick mode
     * -q
     *
     * @var boolean
     */
    private $quick;

    /**
     * Lock tables option
     * --lock-tables
     *
     * @var bool
     */
    private $lockTables;

    /**
     * Single Transaction option
     * --single-transaction
     *
     * @var bool
     */
    private $singleTransaction;

    /**
     * Use mysqldump with compression
     * -C
     *
     * @var boolean
     */
    private $compress;

    /**
     * Use mysqldump with extended insert
     * -e
     *
     * @var boolean
     */
    private $extendedInsert;

    /**
     * Dump blob fields as hex.
     * --hex-blob
     *
     * @var boolean
     */
    private $hexBlob;

    /**
     * Dump only table structures
     * --no-data
     *
     * @var boolean
     */
    private $noData;

    /**
     * Add general transaction id statement.
     * --set-gids-purged=['ON', 'OFF', 'AUTO']
     *
     * @var string
     */
    private $gtidPurged;

    /**
     * Dump procedures and functions.
     * --routines
     *
     * @var bool
     */
    private $routines;

    /**
     * Setup.
     *
     * @see    \phpbu\App\Backup\Source
     * @param  array $conf
     * @throws \phpbu\App\Exception
     */
    public function setup(array $conf = [])
    {
        $this->setupSourceData($conf);

        $this->pathToMysqldump   = Util\Arr::getValue($conf, 'pathToMysqldump', '');
        $this->host              = Util\Arr::getValue($conf, 'host', '');
        $this->port              = Util\Arr::getValue($conf, 'port', 0);
        $this->protocol          = Util\Arr::getValue($conf, 'protocol', '');
        $this->user              = Util\Arr::getValue($conf, 'user', '');
        $this->password          = Util\Arr::getValue($conf, 'password', '');
        $this->gtidPurged        = Util\Arr::getValue($conf, 'gtidPurged', '');
        $this->hexBlob           = Util\Str::toBoolean(Util\Arr::getValue($conf, 'hexBlob', ''), false);
        $this->quick             = Util\Str::toBoolean(Util\Arr::getValue($conf, 'quick', ''), false);
        $this->lockTables        = Util\Str::toBoolean(Util\Arr::getValue($conf, 'lockTables', ''), false);
        $this->singleTransaction = Util\Str::toBoolean(Util\Arr::getValue($conf, 'singleTransaction', ''), false);
        $this->compress          = Util\Str::toBoolean(Util\Arr::getValue($conf, 'compress', ''), false);
        $this->extendedInsert    = Util\Str::toBoolean(Util\Arr::getValue($conf, 'extendedInsert', ''), false);
        $this->noData            = Util\Str::toBoolean(Util\Arr::getValue($conf, 'noData', ''), false);
        $this->filePerTable      = Util\Str::toBoolean(Util\Arr::getValue($conf, 'filePerTable', ''), false);
        $this->routines          = Util\Str::toBoolean(Util\Arr::getValue($conf, 'routines', ''), false);

        // this doesn't fail, but it doesn't work, so throw an exception so the user understands
        if ($this->filePerTable && count($this->structureOnly)) {
            throw new Exception('\'structureOnly\' can not be used with the \'filePerTable\' option');
        }
    }

    /**
     * Get tables and databases to backup.
     *
     * @param array $conf
     */
    protected function setupSourceData(array $conf)
    {
        $this->tables        = Util\Str::toList(Util\Arr::getValue($conf, 'tables', ''));
        $this->databases     = Util\Str::toList(Util\Arr::getValue($conf, 'databases', ''));
        $this->ignoreTables  = Util\Str::toList(Util\Arr::getValue($conf, 'ignoreTables', ''));
        $this->structureOnly = Util\Str::toList(Util\Arr::getValue($conf, 'structureOnly', ''));
    }

    /**
     * Execute the backup.
     *
     * @see    \phpbu\App\Backup\Source
     * @param  \phpbu\App\Backup\Target $target
     * @param  \phpbu\App\Result        $result
     * @return \phpbu\App\Backup\Source\Status
     * @throws \phpbu\App\Exception
     */
    public function backup(Target $target, Result $result) : Status
    {
        // create the writable dump directory for tables files
        if ($this->filePerTable && !is_dir($this->getDumpTarget($target))) {
            $old = umask(0);
            mkdir($this->getDumpTarget($target), 0777, true);
            umask($old);
        }

        $mysqldump = $this->execute($target);

        $result->debug($this->getExecutable($target)->getCommandPrintable());

        if (!$mysqldump->isSuccessful()) {
            throw new Exception('mysqldump failed:' . $mysqldump->getStdErr());
        }

        return $this->createStatus($target);
    }

    /**
     * Restore the backup
     *
     * @param \phpbu\App\Backup\Target       $target
     * @param \phpbu\App\Backup\Restore\Plan $plan
     * @return \phpbu\App\Backup\Source\Status
     * @throws \phpbu\App\Exception
     */
    public function restore(Target $target, Plan $plan): Status
    {
        $source   = $target->getPathname(true);
        $host     = empty($this->host) ? '' : ' --host=' . $this->host;
        $port     = empty($this->port) ? '' : ' --port=' . $this->port;
        $protocol = empty($this->protocol) ? '' : ' --protocol=' . $this->protocol;
        $user     = empty($this->user) ? '' : ' --user=' . $this->user;
        $password = empty($this->password) ? '' : ' --passsword=******';
        $quick    = empty($this->quick) ? '' : '-q';

        $commonOptions = $host . $port . $protocol . $user . $password;

        if ($this->filePerTable) {
            $database   = $this->databases[0];
            $sourceTar  = $source . '.tar';
            $sourceDump = $source . '.dump';

            $mysqlFormat   = 'find %s -name "*.sql" -exec sh -c \' mysql %s %s %s < "$0" \' {} ";"';
            $importFormat  = 'find %s -name "*.txt" -exec sh -c \' mysqlimport %s %s "$0" \' {} ";"';
            $mysqlCommand  = sprintf($mysqlFormat, $sourceDump, $database, $commonOptions, $quick);
            $importCommand = sprintf($importFormat, $sourceDump, $database, $commonOptions);

            $plan->addRestoreCommand('tar -xvf ' . $sourceTar);
            $plan->addRestoreCommand($mysqlCommand);
            $plan->addRestoreCommand($importCommand);
        } else {
            $command = sprintf('mysql %s %s < %s', $commonOptions, $quick, $source);
            $plan->addRestoreCommand($command);
        }

        return Status::create()->uncompressedFile($target->getPathname());
    }

    /**
     * Create the Executable to run the mysqldump command.
     *
     * @param  \phpbu\App\Backup\Target $target
     * @return \phpbu\App\Cli\Executable
     */
    protected function createExecutable(Target $target) : Executable
    {
        $executable = new Executable\Mysqldump($this->pathToMysqldump);
        $executable->credentials($this->user, $this->password)
                   ->useHost($this->host)
                   ->usePort($this->port)
                   ->useProtocol($this->protocol)
                   ->useQuickMode($this->quick)
                   ->lockTables($this->lockTables)
                   ->dumpBlobsHexadecimal($this->hexBlob)
                   ->addGTIDStatement($this->gtidPurged)
                   ->useCompression($this->compress)
                   ->useExtendedInsert($this->extendedInsert)
                   ->dumpTables($this->tables)
                   ->singleTransaction($this->singleTransaction)
                   ->dumpDatabases($this->databases)
                   ->ignoreTables($this->ignoreTables)
                   ->produceFilePerTable($this->filePerTable)
                   ->dumpNoData($this->noData)
                   ->dumpRoutines($this->routines)
                   ->dumpStructureOnly($this->structureOnly)
                   ->dumpTo($this->getDumpTarget($target));
        // if compression is active and commands can be piped
        if ($this->isHandlingCompression($target)) {
            $executable->compressOutput($target->getCompression());
        }
        return $executable;
    }

    /**
     * Create backup status.
     *
     * @param  \phpbu\App\Backup\Target $target
     * @return \phpbu\App\Backup\Source\Status
     */
    protected function createStatus(Target $target) : Status
    {
        // file_per_table creates a directory with all the files
        if ($this->filePerTable) {
            return Status::create()->uncompressedDirectory($this->getDumpTarget($target));
        }

        // if compression is active and commands can be piped
        // compression is handled via pipe
        if ($this->isHandlingCompression($target)) {
            return Status::create();
        }

        // default create uncompressed dump file
        return Status::create()->uncompressedFile($this->getDumpTarget($target));
    }

    /**
     * Cann compression be handled via pipe operator.
     *
     * @param  \phpbu\App\Backup\Target $target
     * @return bool
     */
    private function isHandlingCompression(Target $target) : bool
    {
        return $target->shouldBeCompressed() && Util\Cli::canPipe() && $target->getCompression()->isPipeable();
    }

    /**
     * Return dump target path.
     *
     * @param  \phpbu\App\Backup\Target $target
     * @return string
     */
    private function getDumpTarget(Target $target) : string
    {
        return $target->getPathnamePlain() . ($this->filePerTable ? '.dump' : '');
    }
}