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using IPA.Logging;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Specialized;
using System.ComponentModel;
using System.IO;
namespace IPA.Config.ConfigProviders
{
[Config.Type("json")]
internal class JsonConfigProvider : IConfigProvider
{
public static void RegisterConfig()
{
Config.Register<JsonConfigProvider>();
}
private JObject jsonObj;
#if NET4
// TODO: create a wrapper that allows empty object creation
public dynamic Dynamic => jsonObj;
#endif
public bool HasChanged { get; private set; }
public bool InMemoryChanged { get; set; }
public DateTime LastModified => File.GetLastWriteTime(Filename + ".json");
private string _filename;
public string Filename
{
get => _filename;
set
{
if (_filename != null)
throw new InvalidOperationException("Can only assign to Filename once");
_filename = value;
}
}
public void Load()
{
Logger.config.Debug($"Loading file {Filename}.json");
var fileInfo = new FileInfo(Filename + ".json");
if (fileInfo.Exists)
{
string json = File.ReadAllText(fileInfo.FullName);
try
{
jsonObj = JObject.Parse(json);
}
catch (Exception e)
{
Logger.config.Error($"Error parsing JSON in file {Filename}.json; resetting to empty JSON");
Logger.config.Error(e);
jsonObj = new JObject();
File.WriteAllText(fileInfo.FullName, JsonConvert.SerializeObject(jsonObj, Formatting.Indented));
}
}
else
{
jsonObj = new JObject();
}
SetupListeners();
InMemoryChanged = true;
}
private void SetupListeners()
{
jsonObj.PropertyChanged += JsonObj_PropertyChanged;
jsonObj.ListChanged += JsonObj_ListChanged;
#if NET4
jsonObj.CollectionChanged += JsonObj_CollectionChanged;
#endif
}
#if NET4
private void JsonObj_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
HasChanged = true;
InMemoryChanged = true;
}
#endif
private void JsonObj_ListChanged(object sender, ListChangedEventArgs e)
{
HasChanged = true;
InMemoryChanged = true;
}
private void JsonObj_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
HasChanged = true;
InMemoryChanged = true;
}
public T Parse<T>()
{
if (jsonObj == null)
return default(T);
return jsonObj.ToObject<T>();
}
public void Save()
{
Logger.config.Debug($"Saving file {Filename}.json");
if (!Directory.Exists(Path.GetDirectoryName(Filename)))
Directory.CreateDirectory(Path.GetDirectoryName(Filename) ?? throw new InvalidOperationException());
File.WriteAllText(Filename + ".json", JsonConvert.SerializeObject(jsonObj, Formatting.Indented));
HasChanged = false;
}
public void Store<T>(T obj)
{
jsonObj = JObject.FromObject(obj);
SetupListeners();
HasChanged = true;
InMemoryChanged = true;
}
}
}