/**
* Get all available migrations for a scope from file system.
* If direction equals "down" then additionally check against migrated versions in schema_migration
* to only migrate existing ones down.
* This makes it possible to insert new migrations in between already existing and migrated ones.
*
* @param string $scope The scope (app or plugin name) that you want to get migrations from.
* @param string $direction The migration direction for which to order the available migrations array.
* @return array all available migrations for this scope
*/
protected function _getAvailableMigrations($scope, $direction = 'up')
{
if (!isset($this->_migrations[$scope]) || empty($this->_migrations[$scope])) {
$folder = $this->_getMigrationsFolder($scope);
if (!$folder) {
return array();
}
$this->_migrations[$scope] = array();
foreach ($folder->find("^\\d+_.*\\.php\$", true) as $mf) {
if (preg_match("/^(\\d+)_(.*)\\.php\$/", $mf, $matches) === 1) {
list($fileName, $version, $name) = $matches;
$this->_migrations[$scope][$version] = array('path' => $folder->path, 'fileName' => $fileName, 'className' => Inflector::camelize($name));
}
}
}
$migrations = $this->_migrations[$scope];
if ($direction === 'down') {
$migrations = array_reverse($migrations);
$existingMigrations = $this->SchemaMigration->getMigrationsForDown($scope);
foreach (array_keys($migrations) as $key) {
if (!array_key_exists($key, $existingMigrations)) {
unset($migrations[$key]);
}
}
}
return $migrations;
}
