/**
* Initialize the extension manager by loading extensions in EXTENSIONS_PATH.
*
* A valid extension is a directory containing metadata.json and
* extension.php files.
* metadata.json is a JSON structure where the only required fields are
* `name` and `entry_point`.
* extension.php should contain at least a class named <name>Extension where
* <name> must match with the entry point in metadata.json. This class must
* inherit from Minz_Extension class.
*/
public static function init()
{
$list_potential_extensions = array_values(array_diff(scandir(EXTENSIONS_PATH), array('..', '.')));
$system_conf = Minz_Configuration::get('system');
self::$ext_auto_enabled = $system_conf->extensions_enabled;
foreach ($list_potential_extensions as $ext_dir) {
$ext_pathname = EXTENSIONS_PATH . '/' . $ext_dir;
if (!is_dir($ext_pathname)) {
continue;
}
$metadata_filename = $ext_pathname . '/' . self::$ext_metaname;
// Try to load metadata file.
if (!file_exists($metadata_filename)) {
// No metadata file? Invalid!
continue;
}
$meta_raw_content = file_get_contents($metadata_filename);
$meta_json = json_decode($meta_raw_content, true);
if (!$meta_json || !self::isValidMetadata($meta_json)) {
// metadata.json is not a json file? Invalid!
// or metadata.json is invalid (no required information), invalid!
Minz_Log::warning('`' . $metadata_filename . '` is not a valid metadata file');
continue;
}
$meta_json['path'] = $ext_pathname;
// Try to load extension itself
$extension = self::load($meta_json);
if (!is_null($extension)) {
self::register($extension);
}
}
}
