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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using ArcaneLibs.Extensions;
using LibMatrix.Interfaces.Services;
namespace ModerationClient.Services;
public class FileStorageProvider : IStorageProvider {
// private readonly ILogger<FileStorageProvider> _logger;
private static readonly JsonSerializerOptions Options = new() {
WriteIndented = true
};
private static readonly EnumerationOptions EnumOpts = new EnumerationOptions() {
MatchType = MatchType.Simple,
AttributesToSkip = FileAttributes.None,
IgnoreInaccessible = false,
RecurseSubdirectories = true
};
public string TargetPath { get; }
/// <summary>
/// Creates a new instance of <see cref="FileStorageProvider" />.
/// </summary>
/// <param name="targetPath"></param>
public FileStorageProvider(string targetPath) {
// new Logger<FileStorageProvider>(new LoggerFactory()).LogInformation("test");
Console.WriteLine($"Initialised FileStorageProvider with path {targetPath}");
TargetPath = targetPath;
if (!Directory.Exists(targetPath)) {
Directory.CreateDirectory(targetPath);
}
}
public async Task SaveObjectAsync<T>(string key, T value) {
EnsureContainingDirectoryExists(GetFullPath(key));
await using var fileStream = File.Create(GetFullPath(key));
await JsonSerializer.SerializeAsync(fileStream, value, Options);
}
[RequiresUnreferencedCode("This API uses reflection to deserialize JSON")]
public async Task<T?> LoadObjectAsync<T>(string key) {
await using var fileStream = File.OpenRead(GetFullPath(key));
return JsonSerializer.Deserialize<T>(fileStream);
}
public Task<bool> ObjectExistsAsync(string key) => Task.FromResult(File.Exists(GetFullPath(key)));
public async Task<IEnumerable<string>> GetAllKeysAsync() {
var sw = Stopwatch.StartNew();
// var result = Directory.EnumerateFiles(TargetPath, "*", SearchOption.AllDirectories)
var result = Directory.EnumerateFiles(TargetPath, "*", EnumOpts)
.Select(s => s.Replace(TargetPath, "").TrimStart('/'));
// Console.WriteLine($"GetAllKeysAsync got {result.Count()} results in {sw.ElapsedMilliseconds}ms");
// Environment.Exit(0);
return result;
}
public Task DeleteObjectAsync(string key) {
File.Delete(GetFullPath(key));
return Task.CompletedTask;
}
public async Task SaveStreamAsync(string key, Stream stream) {
EnsureContainingDirectoryExists(GetFullPath(key));
await using var fileStream = File.Create(GetFullPath(key));
await stream.CopyToAsync(fileStream);
}
public Task<Stream?> LoadStreamAsync(string key) => Task.FromResult<Stream?>(File.Exists(GetFullPath(key)) ? File.OpenRead(GetFullPath(key)) : null);
public Task CopyObjectAsync(string sourceKey, string destKey) {
EnsureContainingDirectoryExists(GetFullPath(destKey));
File.Copy(GetFullPath(sourceKey), GetFullPath(destKey));
return Task.CompletedTask;
}
public Task MoveObjectAsync(string sourceKey, string destKey) {
EnsureContainingDirectoryExists(GetFullPath(destKey));
File.Move(GetFullPath(sourceKey), GetFullPath(destKey));
return Task.CompletedTask;
}
private string GetFullPath(string key) => Path.Join(TargetPath, key);
private void EnsureContainingDirectoryExists(string path) {
Directory.CreateDirectory(Path.GetDirectoryName(path) ?? throw new InvalidOperationException());
}
}
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