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<?php |
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namespace Stats\Database; |
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use Joomla\Database\DatabaseDriver; |
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use League\Flysystem\FileNotFoundException; |
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use League\Flysystem\Filesystem; |
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/** |
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* Class for managing database migrations |
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* |
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* @since 1.0 |
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*/ |
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class Migrations |
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{ |
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/** |
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* Database connector |
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* |
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* @var DatabaseDriver |
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* @since 1.0 |
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*/ |
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private $database; |
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/** |
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* Filesystem adapter |
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* |
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* @var Filesystem |
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* @since 1.0 |
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*/ |
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private $filesystem; |
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/** |
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* Constructor |
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* |
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* @param DatabaseDriver $database Database connector |
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* @param Filesystem $filesystem Filesystem adapter |
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* |
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* @since 1.0 |
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*/ |
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public function __construct(DatabaseDriver $database, Filesystem $filesystem) |
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{ |
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$this->database = $database; |
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$this->filesystem = $filesystem; |
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} |
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/** |
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* Checks the migration status of the current installation |
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* |
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* @return array |
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* |
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* @since 1.0 |
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*/ |
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public function checkStatus() |
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{ |
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$response = ['latest' => false]; |
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// First get the list of applied migrations |
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$appliedMigrations = $this->database->setQuery( |
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$this->database->getQuery(true) |
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->select('version') |
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->from('#__migrations') |
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)->loadColumn(); |
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// Now get the list of all known migrations |
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$knownMigrations = []; |
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foreach ($this->filesystem->listContents('migrations') as $migrationFiles) |
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{ |
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$knownMigrations[] = $migrationFiles['filename']; |
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} |
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// Don't rely on file system ordering. |
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sort($knownMigrations); |
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// Validate all migrations are applied; the count and latest versions should match |
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if (count($appliedMigrations) === count($knownMigrations)) |
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{ |
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$appliedValues = array_values($appliedMigrations); |
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$knownValues = array_values($knownMigrations); |
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$latestApplied = (int) end($appliedValues); |
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$latestKnown = (int) end($knownValues); |
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// Versions match, good to go |
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if ($latestApplied === $latestKnown) |
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{ |
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$response['latest'] = true; |
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return $response; |
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} |
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} |
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// The system is not on the latest version, get the relevant data |
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$countMissing = count($knownMigrations) - count($appliedMigrations); |
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$currentVersion = array_pop($appliedMigrations); |
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$latestVersion = array_pop($knownMigrations); |
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return array_merge( |
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$response, |
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[ |
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'missingMigrations' => $countMissing, |
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'currentVersion' => $currentVersion, |
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'latestVersion' => $latestVersion |
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] |
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); |
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} |
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/** |
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* Migrate the database |
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* |
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* @param string $version Optional migration version to run |
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* |
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* @return void |
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* |
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* @since 1.0 |
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*/ |
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public function migrateDatabase($version = null) |
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{ |
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// Determine the migrations to apply |
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$appliedMigrations = $this->database->setQuery( |
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$this->database->getQuery(true) |
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->select('version') |
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->from('#__migrations') |
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)->loadColumn(); |
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// If a version is specified, check if that migration is already applied and if not, run that one only |
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if ($version !== null) |
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{ |
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// If it's already applied, there's nothing to do here |
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if (in_array($version, $appliedMigrations)) |
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{ |
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return; |
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} |
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return $this->doMigration($version); |
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} |
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// We need to check the known migrations and filter out the applied ones to know what to do |
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$knownMigrations = []; |
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foreach ($this->filesystem->listContents('migrations') as $migrationFiles) |
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{ |
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$knownMigrations[] = $migrationFiles['filename']; |
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} |
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foreach (array_diff($knownMigrations, $appliedMigrations) as $version) |
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{ |
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$this->doMigration($version); |
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} |
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} |
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/** |
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* Perform the database migration for the specified version |
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* |
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* @param string $version Migration version to run |
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* |
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* @return void |
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* |
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* @since 1.0 |
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* @throws FileNotFoundException |
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*/ |
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private function doMigration($version) |
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{ |
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$sqlFile = 'migrations/' . $version . '.sql'; |
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if (!$this->filesystem->has($sqlFile)) |
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{ |
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throw new FileNotFoundException($sqlFile); |
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} |
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$queries = $this->filesystem->read($sqlFile); |
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if ($queries === false) |
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{ |
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throw new \RuntimeException( |
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sprintf( |
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'Could not read data from the %s SQL file, please update the database manually.', |
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$sqlFile |
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) |
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); |
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} |
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foreach ($this->database->splitSql($queries) as $query) |
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{ |
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$query = trim($query); |
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if (!empty($query)) |
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{ |
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$this->database->setQuery($query)->execute(); |
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} |
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} |
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// Log the migration into the database |
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$this->database->setQuery( |
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$this->database->getQuery(true) |
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->insert('#__migrations') |
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->columns('version') |
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->values($version) |
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)->execute(); |
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} |
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} |
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joomla /
statistics-server
