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FileSystemStorage.cs
File metadata and controls
239 lines (191 loc) · 7.31 KB
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using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.CompilerServices;
using System.Threading;
using System.Threading.Tasks;
using ManagedCode.Communication;
using ManagedCode.Communication.Extensions;
using ManagedCode.MimeTypes;
using ManagedCode.Storage.Core;
using ManagedCode.Storage.Core.Models;
using ManagedCode.Storage.FileSystem.Options;
namespace ManagedCode.Storage.FileSystem;
public class FileSystemStorage : BaseStorage<string, FileSystemStorageOptions>, IFileSystemStorage
{
private readonly Dictionary<string, FileStream> _lockedFiles = new();
public FileSystemStorage(FileSystemStorageOptions options) : base(options)
{
}
public override async Task<Result> RemoveContainerAsync(CancellationToken cancellationToken = default)
{
await Task.Yield();
if (Directory.Exists(StorageClient))
{
Directory.Delete(StorageClient, true);
}
return Result.Succeed();
}
public override async IAsyncEnumerable<BlobMetadata> GetBlobMetadataListAsync(string? directory = null,
[EnumeratorCancellation] CancellationToken cancellationToken = default)
{
await EnsureContainerExist();
var path = directory is null ? StorageClient : Path.Combine(StorageClient, directory);
if (!Directory.Exists(path))
{
yield break;
}
foreach (var file in Directory.EnumerateFiles(path))
{
var blobMetadata = await GetBlobMetadataAsync(file, cancellationToken);
if (blobMetadata.IsSuccess)
{
yield return blobMetadata.Value!;
}
}
}
protected override string CreateStorageClient()
{
return StorageOptions.BaseFolder ?? Environment.CurrentDirectory;
}
protected override async Task<Result> CreateContainerInternalAsync(CancellationToken cancellationToken = default)
{
await Task.Yield();
if (!Directory.Exists(StorageClient))
{
Directory.CreateDirectory(StorageClient);
}
return Result.Succeed();
}
protected override Task<Result> DeleteDirectoryInternalAsync(string directory, CancellationToken cancellationToken = default)
{
var path = Path.Combine(StorageClient, directory);
if (Directory.Exists(path))
{
Directory.Delete(path, true);
}
return Result.Succeed().AsTask();
}
protected override async Task<Result<BlobMetadata>> UploadInternalAsync(Stream stream,
UploadOptions options,
CancellationToken cancellationToken = default)
{
await EnsureContainerExist();
var filePath = GetPathFromOptions(options);
using (var fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write))
{
stream.Seek(0, SeekOrigin.Begin);
await stream.CopyToAsync(fs, 81920, cancellationToken);
}
return await GetBlobMetadataInternalAsync(MetadataOptions.FromBaseOptions(options), cancellationToken);
}
private string GetPathFromOptions(BaseOptions options)
{
string filePath;
if (options.Directory is not null)
{
EnsureDirectoryExist(options.Directory);
filePath = Path.Combine(StorageClient, options.Directory, options.FileName);
}
else
{
filePath = Path.Combine(StorageClient, options.FileName);
}
EnsureDirectoryExist(Path.GetDirectoryName(filePath));
return filePath;
}
protected override async Task<Result<LocalFile>> DownloadInternalAsync(LocalFile localFile,
DownloadOptions options,
CancellationToken cancellationToken = default)
{
await EnsureContainerExist();
var filePath = GetPathFromOptions(options);
return File.Exists(filePath)
? Result<LocalFile>.Succeed(new LocalFile(filePath))
: Result<LocalFile>.Fail("File not found");
}
protected override async Task<Result<bool>> DeleteInternalAsync(DeleteOptions options, CancellationToken cancellationToken = default)
{
await EnsureContainerExist();
var filePath = GetPathFromOptions(options);
if (!File.Exists(filePath))
{
return Result<bool>.Succeed(false);
}
File.Delete(filePath);
return Result<bool>.Succeed(true);
}
protected override async Task<Result<bool>> ExistsInternalAsync(ExistOptions options, CancellationToken cancellationToken = default)
{
await EnsureContainerExist();
var filePath = GetPathFromOptions(options);
return Result<bool>.Succeed(File.Exists(filePath));
}
protected override async Task<Result<BlobMetadata>> GetBlobMetadataInternalAsync(MetadataOptions options,
CancellationToken cancellationToken = default)
{
await EnsureContainerExist();
var filePath = GetPathFromOptions(options);
var fileInfo = new FileInfo(filePath);
if (!fileInfo.Exists)
{
return Result<BlobMetadata>.Fail("File not found");
}
var result = new BlobMetadata
{
Name = fileInfo.Name,
Uri = new Uri(Path.Combine(StorageClient, filePath)),
MimeType = MimeHelper.GetMimeType(fileInfo.Extension),
CreatedOn = fileInfo.CreationTimeUtc,
LastModified = fileInfo.LastWriteTimeUtc,
Length = fileInfo.Length
};
return Result<BlobMetadata>.Succeed(result);
}
protected override async Task<Result> SetLegalHoldInternalAsync(bool hasLegalHold,
LegalHoldOptions options,
CancellationToken cancellationToken = default)
{
var filePath = GetPathFromOptions(options);
await EnsureContainerExist();
if (hasLegalHold && !_lockedFiles.ContainsKey(filePath))
{
var file = await DownloadAsync(filePath, cancellationToken);
if (file.IsFailed)
{
return Result.Fail(file.Errors);
}
var fileStream = File.OpenRead(file.Value!.FilePath); // Opening with FileAccess.Read only
if (Environment.OSVersion.Platform != PlatformID.MacOSX)
{
fileStream.Lock(0, fileStream.Length); // Attempting to lock a region of the read-only file
}
_lockedFiles.Add(filePath, fileStream);
return Result.Succeed();
}
if (!hasLegalHold)
{
if (_lockedFiles.ContainsKey(filePath))
{
_lockedFiles[filePath].Unlock(0, _lockedFiles[filePath].Length);
_lockedFiles[filePath].Dispose();
_lockedFiles.Remove(filePath);
}
}
return Result.Succeed();
}
protected override async Task<Result<bool>> HasLegalHoldInternalAsync(LegalHoldOptions options, CancellationToken cancellationToken = default)
{
var filePath = GetPathFromOptions(options);
await EnsureContainerExist();
return Result<bool>.Succeed(_lockedFiles.ContainsKey(filePath));
}
private void EnsureDirectoryExist(string directory)
{
var path = Path.Combine(StorageClient, directory);
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
}
}