sharpcompress/src/SharpCompress/Factories/SevenZipFactory.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using SharpCompress.Archives;
using SharpCompress.Archives.SevenZip;
using SharpCompress.Common;
using SharpCompress.Common.Options;
using SharpCompress.IO;
using SharpCompress.Readers;
using SharpCompress.Writers;
using SharpCompress.Writers.SevenZip;

namespace SharpCompress.Factories;

/// <summary>
/// Represents the foundation factory of 7Zip archive.
/// </summary>
public class SevenZipFactory : Factory, IArchiveFactory, IMultiArchiveFactory, IWriterFactory
{
    #region IFactory

    /// <inheritdoc/>
    public override string Name => "7Zip";

    /// <inheritdoc/>
    public override ArchiveType? KnownArchiveType => ArchiveType.SevenZip;

    /// <inheritdoc/>
    public override IEnumerable<string> GetSupportedExtensions()
    {
        yield return "7z";
    }

    /// <inheritdoc/>
    public override bool IsArchive(Stream stream, ReaderOptions readerOptions) =>
        SevenZipArchive.IsSevenZipFile(stream, readerOptions);

    /// <inheritdoc/>
    public override ValueTask<bool> IsArchiveAsync(
        Stream stream,
        ReaderOptions readerOptions,
        CancellationToken cancellationToken = default
    ) => SevenZipArchive.IsSevenZipFileAsync(stream, readerOptions, cancellationToken);

    #endregion

    #region IArchiveFactory

    /// <inheritdoc/>
    public IArchive OpenArchive(Stream stream, ReaderOptions? readerOptions = null) =>
        SevenZipArchive.OpenArchive(stream, readerOptions);

    /// <inheritdoc/>
    public ValueTask<IAsyncArchive> OpenAsyncArchive(
        Stream stream,
        ReaderOptions? readerOptions = null,
        CancellationToken cancellationToken = default
    )
    {
        cancellationToken.ThrowIfCancellationRequested();
        return new((IAsyncArchive)OpenArchive(stream, readerOptions));
    }

    /// <inheritdoc/>
    public IArchive OpenArchive(FileInfo fileInfo, ReaderOptions? readerOptions = null) =>
        SevenZipArchive.OpenArchive(fileInfo, readerOptions);

    /// <inheritdoc/>
    public ValueTask<IAsyncArchive> OpenAsyncArchive(
        FileInfo fileInfo,
        ReaderOptions? readerOptions = null,
        CancellationToken cancellationToken = default
    )
    {
        cancellationToken.ThrowIfCancellationRequested();
        return new((IAsyncArchive)OpenArchive(fileInfo, readerOptions));
    }

    #endregion

    #region IMultiArchiveFactory

    /// <inheritdoc/>
    public IArchive OpenArchive(
        IReadOnlyList<Stream> streams,
        ReaderOptions? readerOptions = null
    ) => SevenZipArchive.OpenArchive(streams, readerOptions);

    /// <inheritdoc/>
    public async ValueTask<IAsyncArchive> OpenAsyncArchive(
        IReadOnlyList<Stream> streams,
        ReaderOptions? readerOptions = null,
        CancellationToken cancellationToken = default
    )
    {
        cancellationToken.ThrowIfCancellationRequested();
        return await SevenZipArchive
            .OpenAsyncArchive(streams, readerOptions, cancellationToken)
            .ConfigureAwait(false);
    }

    /// <inheritdoc/>
    public IArchive OpenArchive(
        IReadOnlyList<FileInfo> fileInfos,
        ReaderOptions? readerOptions = null
    ) => SevenZipArchive.OpenArchive(fileInfos, readerOptions);

    /// <inheritdoc/>
    public async ValueTask<IAsyncArchive> OpenAsyncArchive(
        IReadOnlyList<FileInfo> fileInfos,
        ReaderOptions? readerOptions = null,
        CancellationToken cancellationToken = default
    )
    {
        cancellationToken.ThrowIfCancellationRequested();
        return await SevenZipArchive
            .OpenAsyncArchive(fileInfos, readerOptions, cancellationToken)
            .ConfigureAwait(false);
    }

    #endregion

    #region reader

    internal override bool TryOpenReader(
        SharpCompressStream sharpCompressStream,
        ReaderOptions options,
        out IReader? reader
    )
    {
        reader = null;
        return false;
    }

    #endregion

    #region IWriterFactory

    /// <inheritdoc/>
    public IWriter OpenWriter(Stream stream, IWriterOptions writerOptions)
    {
        SevenZipWriterOptions sevenZipOptions = writerOptions switch
        {
            SevenZipWriterOptions szo => szo,
            WriterOptions wo => new SevenZipWriterOptions(wo),
            _ => throw new ArgumentException(
                $"Expected WriterOptions or SevenZipWriterOptions, got {writerOptions.GetType().Name}",
                nameof(writerOptions)
            ),
        };
        return new SevenZipWriter(stream, sevenZipOptions);
    }

    /// <inheritdoc/>
    public ValueTask<IAsyncWriter> OpenAsyncWriter(
        Stream stream,
        IWriterOptions writerOptions,
        CancellationToken cancellationToken = default
    )
    {
        cancellationToken.ThrowIfCancellationRequested();
        var writer = OpenWriter(stream, writerOptions);
        return new((IAsyncWriter)writer);
    }

    #endregion
}