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<?php
namespace WPIDE\App\Helpers;
use Exception;
use WPIDE\App\Services\Storage\Filesystem;
use WPIDE\App\Services\Storage\LocalFileSystem;
use const WPIDE\Constants\IMAGE_DATA_DIR;
class ImageStateData
{
protected static $storage = null;
public static function init() {
EmptyDir::create(IMAGE_DATA_DIR);
}
public static function getStateFile($id): string
{
return $id.'.json';
}
/**
* @throws Exception
*/
public static function save($item, $state): bool
{
self::createStateFile($item->id, $state);
$dataFile = $item->id.'.'.$item->ext;
if(!self::imageFileExists($dataFile)) {
$rootStorage = LocalFileSystem::load();
$stream = $rootStorage->readStream($item->path);
if (!self::storage()->storeStream('/', $dataFile, $stream['stream'], true)) {
return false;
}
}
return true;
}
public static function createStateFile($id, $state) {
$stateFile = self::getStateFile($id);
if(!self::storage()->storeStreamFromContent('/', $stateFile, $state, true)) {
throw new Exception('Cannot create image state file!');
}
}
public static function stateFileExists($id): bool
{
$stateFile = self::getStateFile($id);
return self::storage()->fileExists($stateFile);
}
public static function imageFileExists($name): bool
{
return self::storage()->fileExists($name);
}
/**
* @throws Exception
*/
public static function getState($id): ?array
{
if(!self::stateFileExists($id)) {
throw new Exception('Image state file not found');
}
$stateFile = self::getStateFile($id);
return self::storage()->read($stateFile);
}
/**
* @throws Exception
*/
public static function deleteState($id): bool
{
if(!self::stateFileExists($id)) {
throw new Exception('Image state file not found');
}
$stateFile = self::getStateFile($id);
return self::storage()->deleteFile($stateFile);
}
/**
* @throws Exception
*/
public static function getImage($name): ?array
{
return self::storage()->readStream($name);
}
protected function getEmptyState(): string
{
return '{
"canvas": {
"version": "4.6.0",
"objects": []
},
"editor": {
"frame": null,
"zoom": 1,
"activeObjectId": null
},
"canvasWidth": 3000,
"canvasHeight": 2500
}';
}
protected static function storage(): Filesystem
{
if(!self::$storage) {
self::$storage = LocalFileSystem::load(IMAGE_DATA_DIR);
}
return self::$storage;
}
}