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<?php
namespace Icinga\Module\Director\Db;
use DirectoryIterator;
use Exception;
use Icinga\Application\Icinga;
use Icinga\Exception\ProgrammingError;
use Icinga\Module\Director\Data\Db\DbConnection;
use RuntimeException;
class Migrations
{
/** @var \Zend_Db_Adapter_Abstract */
protected $db;
/**
* @var DbConnection
*/
protected $connection;
protected $migrationsDir;
public function __construct(DbConnection $connection)
{
if (version_compare(PHP_VERSION, '5.4.0') < 0) {
throw new RuntimeException(
"PHP version 5.4.x is required for Director >= 1.4.0, you're running %s."
. ' Please either upgrade PHP or downgrade Icinga Director',
PHP_VERSION
);
}
$this->connection = $connection;
$this->db = $connection->getDbAdapter();
}
public function getLastMigrationNumber()
{
try {
$query = $this->db->select()->from(
array('m' => $this->getTableName()),
array('schema_version' => 'MAX(schema_version)')
);
return (int) $this->db->fetchOne($query);
} catch (Exception $e) {
return 0;
}
}
protected function getTableName()
{
return $this->getModuleName() . '_schema_migration';
}
public function hasSchema()
{
return $this->listPendingMigrations() !== array(0);
}
public function hasPendingMigrations()
{
return $this->countPendingMigrations() > 0;
}
public function countPendingMigrations()
{
return count($this->listPendingMigrations());
}
/**
* @return Migration[]
*/
public function getPendingMigrations()
{
$migrations = array();
foreach ($this->listPendingMigrations() as $version) {
$migrations[] = new Migration(
$version,
$this->loadMigrationFile($version)
);
}
return $migrations;
}
/**
* @return $this
*/
public function applyPendingMigrations()
{
// Ensure we have enough time to migrate
ini_set('max_execution_time', 0);
foreach ($this->getPendingMigrations() as $migration) {
$migration->apply($this->connection);
}
return $this;
}
public function listPendingMigrations()
{
$lastMigration = $this->getLastMigrationNumber();
if ($lastMigration === 0) {
return array(0);
}
return $this->listMigrationsAfter($this->getLastMigrationNumber());
}
public function listAllMigrations()
{
$dir = $this->getMigrationsDir();
if (! is_readable($dir)) {
return array();
}
$versions = array();
foreach (new DirectoryIterator($this->getMigrationsDir()) as $file) {
if ($file->isDot()) {
continue;
}
$filename = $file->getFilename();
if (preg_match('/^upgrade_(\d+)\.sql$/', $filename, $match)) {
$versions[] = $match[1];
}
}
sort($versions);
return $versions;
}
public function loadMigrationFile($version)
{
if ($version === 0) {
$filename = $this->getFullSchemaFile();
} else {
$filename = $this->getMigrationFileName($version);
}
return file_get_contents($filename);
}
public function hasBeenDowngraded()
{
return ! $this->hasMigrationFile($this->getLastMigrationNumber());
}
public function hasMigrationFile($version)
{
return \file_exists($this->getMigrationFileName($version));
}
protected function getMigrationFileName($version)
{
return sprintf(
'%s/upgrade_%d.sql',
$this->getMigrationsDir(),
$version
);
}
protected function listMigrationsAfter($version)
{
$filtered = array();
foreach ($this->listAllMigrations() as $available) {
if ($available > $version) {
$filtered[] = $available;
}
}
return $filtered;
}
protected function getMigrationsDir()
{
if ($this->migrationsDir === null) {
$this->migrationsDir = $this->getSchemaDir(
$this->connection->getDbType() . '-migrations'
);
}
return $this->migrationsDir;
}
protected function getFullSchemaFile()
{
return $this->getSchemaDir(
$this->connection->getDbType() . '.sql'
);
}
protected function getSchemaDir($sub = null)
{
try {
$dir = $this->getModuleDir('/schema');
} catch (ProgrammingError $e) {
throw new RuntimeException(
'Unable to detect the schema directory for this module',
0,
$e
);
}
if ($sub === null) {
return $dir;
} else {
return $dir . '/' . ltrim($sub, '/');
}
}
/**
* @param string $sub
* @return string
* @throws ProgrammingError
*/
protected function getModuleDir($sub = '')
{
return Icinga::app()->getModuleManager()->getModuleDir(
$this->getModuleName(),
$sub
);
}
protected function getModuleName()
{
return $this->getModuleNameForObject($this);
}
protected function getModuleNameForObject($object)
{
$class = get_class($object);
// Hint: Icinga\Module\ -> 14 chars
return lcfirst(substr($class, 14, strpos($class, '\\', 15) - 14));
}
}
|
