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AvatarHelper
File:
src/EchoHub.Client/Services/AvatarHelper.cs
Kind: class
internal static class AvatarHelper
AvatarHelper provides a single entry point to upload an avatar from either a local file path or a remote URL by converting the target into a Stream, then delegating the actual upload to ApiClient.UploadAvatarAsync. It abstracts away the file I/O and HTTP fetch logic, ensuring callers don't need to manage streams or HTTP requests themselves. It returns the server's ASCII art response as a string? and guarantees the Stream is disposed after the upload.
Remarks
AvatarHelper isolates avatar uploading behind a focused API, so higher-level code doesn't need to know whether the source is a local file or a URL. It accepts either a local path or an HTTP(S) URL, resolves a valid fileName (defaulting to avatar.png when the URL doesn't supply one), and streams the content to ApiClient.UploadAvatarAsync. The helper ensures proper resource management by disposing the Stream after the upload, and it centralizes the cross-cutting concern of avatar uploads to a single place.