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// =============================================================================
// Copyright (c) 2026 Haixing Hu.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0.
// =============================================================================
// facade.
//! Provider-opened synchronous reader envelope.
use qubit_io::Input;
use crate::metadata::OpenedFileInfo;
/// An already-open provider reader.
///
/// # Examples
///
/// ```rust
/// use qubit_fs::metadata::{FileKind, FileMetadata, FileSystemId, OpenedFileInfo};
/// use qubit_fs::path::Path;
/// use qubit_fs::spi::OpenedReader;
/// use std::io::Cursor;
///
/// let info = OpenedFileInfo::new(FileSystemId::new("doc")?, Path::parse("/report")?)
/// .with_metadata(FileMetadata::new(FileKind::File));
/// let _reader = OpenedReader::new(info, Box::new(Cursor::new(b"report".to_vec())));
/// # Ok::<(), qubit_fs::FsError>(())
/// ```
pub struct OpenedReader {
/// Resource identity claimed by the provider.
info: OpenedFileInfo,
/// Provider byte-input session.
reader: Box<dyn Input<Item = u8> + Send>,
}
impl OpenedReader {
/// Wraps a reader which the provider has fully opened.
///
/// # Parameters
/// - `info`: Identity and metadata claimed for the opened resource.
/// - `reader`: Provider reader session.
///
/// # Returns
/// An opened-reader envelope for facade validation.
#[inline]
#[must_use]
pub fn new(info: OpenedFileInfo, reader: Box<dyn Input<Item = u8> + Send>) -> Self {
Self { info, reader }
}
/// Returns the opened reader to the facade.
///
/// # Returns
/// The claimed resource identity and provider reader session.
#[inline]
#[must_use]
pub(crate) fn into_parts(self) -> (OpenedFileInfo, Box<dyn Input<Item = u8> + Send>) {
(self.info, self.reader)
}
}