The File Manager is responsible for securely downloading the upscaled image from the Upsampler temporary URL and storing it locally.

It does not serve downloads to customers (that is handled by the Download Manager). Instead, it handles the “internal” file persistence step after an Upsampler job completes.

Responsibilities

• Ensures there is a dedicated storage directory under WordPress uploads.
• Downloads files from Upsampler using streaming requests.
• Validates downloaded files are legitimate images and are an allowed MIME type.
• Stores the final file with a predictable, job-linked filename.

Storage Location

Files are stored under the WordPress uploads directory:

• {uploads}/sell-my-images/

On first creation, the directory is protected by:

• a .htaccess denying direct access
• an index.php “silence is golden” file

Download + Validation Flow

Primary method:

• SellMyImagesManagersFileManager::download_from_upsampler( $upscaled_url, $job_id )

Behavior:

1. Streams the remote file to a temporary file on disk.
2. Verifies the request returned HTTP 200.
3. Validates content exists (file exists and size > 0).
4. Confirms the file is a real image via getimagesize().
5. Verifies the MIME type is in the allowed list:
   • image/jpeg, image/jpg, image/png, image/webp
6. Renames the temporary file to a final file with the correct extension.

Timeouts

Large image downloads use a longer HTTP timeout:

• DOWNLOAD_TIMEOUT = 300 seconds

Storage Stats

For admin/debug contexts, storage statistics can be retrieved via:

• SellMyImagesManagersFileManager::get_storage_stats()

Returns:

• file_count
• total_size
• total_size_formatted

Related Code

• sell-my-images/src/Managers/FileManager.php
• sell-my-images/src/Managers/DownloadManager.php