Fixes/backup issues (#51)

* Fix: Error related to undefined Backup::size()

* Fix: Disable signals if PCNTL isn't loaded to avoid fatal error (Fixes SIGINT is not defined on environments that are missing the PCNTL library)

app/Http/Controllers/V1/Admin/Backup/BackupsController.php

@@ -36,7 +36,7 @@ class BackupsController extends ApiController
                         return [
                             'path' => $backup->path(),
                             'created_at' => $backup->date()->format('Y-m-d H:i:s'),
-                            'size' => Format::humanReadableSize($backup->size()),
+                            'size' => Format::humanReadableSize($backup->sizeInBytes()),
                         ];
                     })
                     ->toArray();

app/Http/Controllers/V1/Admin/Backup/DownloadBackupController.php

@@ -41,7 +41,7 @@ class DownloadBackupController extends ApiController
         $downloadHeaders = [
             'Cache-Control' => 'must-revalidate, post-check=0, pre-check=0',
             'Content-Type' => 'application/zip',
-            'Content-Length' => $backup->size(),
+            'Content-Length' => $backup->sizeInBytes(),
             'Content-Disposition' => 'attachment; filename="'.$fileName.'"',
             'Pragma' => 'public',
         ];

app/Jobs/CreateBackupJob.php

@@ -44,6 +44,9 @@ class CreateBackupJob implements ShouldQueue
         config(['backup.backup.destination.disks' => [$prefix.$fileDisk->driver]]);
 
         $backupJob = BackupJobFactory::createFromArray(config('backup'));
+        if (! defined('SIGINT')) {
+            $backupJob->disableSignals();
+        }
 
         if ($this->data['option'] === 'only-db') {
             $backupJob->dontBackupFilesystem();