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using System; | ||
using System.Collections; | ||
using System.IO; | ||
using System.Linq; | ||
using System.Text.Json; | ||
using System.Text.Json.Serialization; | ||
using System.Threading; | ||
using System.Threading.Tasks; | ||
using Microsoft.Extensions.Logging; | ||
using SharedLibraryCore; | ||
using SharedLibraryCore.Interfaces; | ||
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namespace IW4MAdmin.Application.IO; | ||
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public class BaseConfigurationHandlerV2<TConfigurationType> : IConfigurationHandlerV2<TConfigurationType> | ||
where TConfigurationType : class | ||
{ | ||
private readonly ILogger<BaseConfigurationHandlerV2<TConfigurationType>> _logger; | ||
private readonly ConfigurationWatcher _watcher; | ||
private readonly JsonSerializerOptions _serializerOptions = new() | ||
{ | ||
WriteIndented = true, | ||
Converters = | ||
{ | ||
new JsonStringEnumConverter() | ||
}, | ||
Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping | ||
}; | ||
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private readonly SemaphoreSlim _onIo = new(1, 1); | ||
private TConfigurationType _configurationInstance; | ||
private string _path = string.Empty; | ||
private event Action<string> FileUpdated; | ||
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public BaseConfigurationHandlerV2(ILogger<BaseConfigurationHandlerV2<TConfigurationType>> logger, ConfigurationWatcher watcher) | ||
{ | ||
_logger = logger; | ||
_watcher = watcher; | ||
FileUpdated += OnFileUpdated; | ||
} | ||
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~BaseConfigurationHandlerV2() | ||
{ | ||
FileUpdated -= OnFileUpdated; | ||
_watcher.Unregister(_path); | ||
} | ||
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public async Task<TConfigurationType> Get(string configurationName, | ||
TConfigurationType defaultConfiguration = default) | ||
{ | ||
if (string.IsNullOrWhiteSpace(configurationName)) | ||
{ | ||
return defaultConfiguration; | ||
} | ||
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var cleanName = configurationName.Replace("\\", "").Replace("/", ""); | ||
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if (string.IsNullOrWhiteSpace(configurationName)) | ||
{ | ||
return defaultConfiguration; | ||
} | ||
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_path = Path.Join(Utilities.OperatingDirectory, "Configuration", $"{cleanName}.json"); | ||
TConfigurationType readConfiguration = null; | ||
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try | ||
{ | ||
await _onIo.WaitAsync(); | ||
await using var fileStream = File.OpenRead(_path); | ||
readConfiguration = | ||
await JsonSerializer.DeserializeAsync<TConfigurationType>(fileStream, _serializerOptions); | ||
fileStream.Close(); | ||
_watcher.Register(_path, FileUpdated); | ||
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if (readConfiguration is null) | ||
{ | ||
_logger.LogError("Could not parse configuration {Type} at {FileName}", typeof(TConfigurationType).Name, | ||
_path); | ||
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return defaultConfiguration; | ||
} | ||
} | ||
catch (FileNotFoundException) | ||
{ | ||
if (defaultConfiguration is not null) | ||
{ | ||
await InternalSet(defaultConfiguration, false); | ||
} | ||
} | ||
catch (Exception ex) | ||
{ | ||
_logger.LogError(ex, "Could not read configuration file at {Path}", _path); | ||
return defaultConfiguration; | ||
} | ||
finally | ||
{ | ||
if (_onIo.CurrentCount == 0) | ||
{ | ||
_onIo.Release(1); | ||
} | ||
} | ||
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return _configurationInstance ??= readConfiguration; | ||
} | ||
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public async Task Set(TConfigurationType configuration) | ||
{ | ||
await InternalSet(configuration, true); | ||
} | ||
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public async Task Set() | ||
{ | ||
if (_configurationInstance is not null) | ||
{ | ||
await InternalSet(_configurationInstance, true); | ||
} | ||
} | ||
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private async Task InternalSet(TConfigurationType configuration, bool awaitSemaphore) | ||
{ | ||
try | ||
{ | ||
if (awaitSemaphore) | ||
{ | ||
await _onIo.WaitAsync(); | ||
} | ||
await using var fileStream = File.OpenWrite(_path); | ||
await JsonSerializer.SerializeAsync(fileStream, configuration, _serializerOptions); | ||
fileStream.Close(); | ||
_configurationInstance = configuration; | ||
} | ||
catch (Exception ex) | ||
{ | ||
_logger.LogError(ex, "Could not save configuration {Type} {Path}", configuration.GetType().Name, _path); | ||
} | ||
finally | ||
{ | ||
if (awaitSemaphore && _onIo.CurrentCount == 0) | ||
{ | ||
_onIo.Release(1); | ||
} | ||
} | ||
} | ||
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private async void OnFileUpdated(string filePath) | ||
{ | ||
try | ||
{ | ||
await _onIo.WaitAsync(); | ||
await using var fileStream = File.OpenRead(_path); | ||
var readConfiguration = | ||
await JsonSerializer.DeserializeAsync<TConfigurationType>(fileStream, _serializerOptions); | ||
fileStream.Close(); | ||
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if (readConfiguration is null) | ||
{ | ||
_logger.LogWarning("Could not parse updated configuration {Type} at {Path}", | ||
typeof(TConfigurationType).Name, filePath); | ||
} | ||
else | ||
{ | ||
CopyUpdatedProperties(readConfiguration); | ||
} | ||
} | ||
catch (Exception ex) | ||
{ | ||
_logger.LogWarning(ex, "Could not parse updated configuration {Type} at {Path}", | ||
typeof(TConfigurationType).Name, filePath); | ||
} | ||
finally | ||
{ | ||
if (_onIo.CurrentCount == 0) | ||
{ | ||
_onIo.Release(1); | ||
} | ||
} | ||
} | ||
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private void CopyUpdatedProperties(TConfigurationType newConfiguration) | ||
{ | ||
if (_configurationInstance is null) | ||
{ | ||
_configurationInstance = newConfiguration; | ||
return; | ||
} | ||
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_logger.LogDebug("Updating existing config with new values {Type} at {Path}", typeof(TConfigurationType).Name, _path); | ||
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if (_configurationInstance is IDictionary configDict && newConfiguration is IDictionary newConfigDict) | ||
{ | ||
configDict.Clear(); | ||
foreach (var key in newConfigDict.Keys) | ||
{ | ||
configDict.Add(key, newConfigDict[key]); | ||
} | ||
} | ||
else | ||
{ | ||
foreach (var property in _configurationInstance.GetType().GetProperties() | ||
.Where(prop => prop.CanRead && prop.CanWrite)) | ||
{ | ||
property.SetValue(_configurationInstance, property.GetValue(newConfiguration)); | ||
} | ||
} | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,10 @@ | ||
using System.Threading.Tasks; | ||
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namespace SharedLibraryCore.Interfaces; | ||
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public interface IConfigurationHandlerV2<TConfigurationType> where TConfigurationType: class | ||
{ | ||
Task<TConfigurationType> Get(string configurationName, TConfigurationType defaultConfiguration = null); | ||
Task Set(TConfigurationType configuration); | ||
Task Set(); | ||
} |