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using IPA.Config.Data;
using IPA.Logging;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Linq;
using System.Collections.Specialized;
using System.ComponentModel;
using System.IO;
using System.Collections.Generic;
using Boolean = IPA.Config.Data.Boolean;
namespace IPA.Config.Providers
{
internal class JsonConfigProvider : IConfigProvider
{
public static void RegisterConfig()
{
Config.Register<JsonConfigProvider>();
}
public string Extension => "json";
public FileInfo File { get; set; }
public Value Load()
{
if (!File.Exists) return Value.Null();
JToken jtok;
using (var sreader = new StreamReader(File.OpenRead()))
{
using var jreader = new JsonTextReader(sreader);
jtok = JToken.ReadFrom(jreader);
}
try
{
return VisitToValue(jtok);
}
catch (Exception e)
{
Logger.config.Error($"Error reading JSON file {File.FullName}; ignoring");
Logger.config.Error(e);
return Value.Null();
}
}
private Value VisitToValue(JToken tok)
{
if (tok == null) return Value.Null();
switch (tok.Type)
{
case JTokenType.Raw: // idk if the parser will normally emit a Raw type, but just to be safe
return VisitToValue(JToken.Parse((tok as JRaw).Value as string));
case JTokenType.Undefined:
Logger.config.Warn("Found JTokenType.Undefined");
goto case JTokenType.Null;
case JTokenType.Bytes: // never used by Newtonsoft
Logger.config.Warn("Found JTokenType.Bytes");
goto case JTokenType.Null;
case JTokenType.Comment: // never used by Newtonsoft
Logger.config.Warn("Found JTokenType.Comment");
goto case JTokenType.Null;
case JTokenType.Constructor: // never used by Newtonsoft
Logger.config.Warn("Found JTokenType.Constructor");
goto case JTokenType.Null;
case JTokenType.Property: // never used by Newtonsoft
Logger.config.Warn("Found JTokenType.Property");
goto case JTokenType.Null;
case JTokenType.Null:
return Value.Null();
case JTokenType.Boolean:
return Value.Bool(((tok as JValue).Value as bool?) ?? false);
case JTokenType.String:
var val = (tok as JValue).Value;
if (val is string s) return Value.Text(s);
else if (val is char c) return Value.Text("" + c);
else return Value.Text(string.Empty);
case JTokenType.Integer:
val = (tok as JValue).Value;
if (val is long l) return Value.Integer(l);
else if (val is ulong u) return Value.Integer((long)u);
else return Value.Integer(0);
case JTokenType.Float:
val = (tok as JValue).Value;
if (val is decimal dec) return Value.Float(dec);
else if (val is double dou) return Value.Float((decimal)dou);
else if (val is float flo) return Value.Float((decimal)flo);
else return Value.Float(0); // default to 0 if something breaks
case JTokenType.Date:
val = (tok as JValue).Value;
if (val is DateTime dt) return Value.Text(dt.ToString());
else if (val is DateTimeOffset dto) return Value.Text(dto.ToString());
else return Value.Text("Unknown Date-type token");
case JTokenType.TimeSpan:
val = (tok as JValue).Value;
if (val is TimeSpan ts) return Value.Text(ts.ToString());
else return Value.Text("Unknown TimeSpan-type token");
case JTokenType.Guid:
val = (tok as JValue).Value;
if (val is Guid g) return Value.Text(g.ToString());
else return Value.Text("Unknown Guid-type token");
case JTokenType.Uri:
val = (tok as JValue).Value;
if (val is Uri ur) return Value.Text(ur.ToString());
else return Value.Text("Unknown Uri-type token");
case JTokenType.Array:
return Value.From((tok as JArray).Select(VisitToValue));
case JTokenType.Object:
return Value.From((tok as IEnumerable<KeyValuePair<string, JToken>>)
.Select(kvp => new KeyValuePair<string, Value>(kvp.Key, VisitToValue(kvp.Value))));
default:
throw new ArgumentException($"Unknown {nameof(JTokenType)} in parameter");
}
}
public void Store(Value value)
{
if (File.Directory.Exists)
File.Directory.Create();
try
{
var tok = VisitToToken(value);
using var swriter = new StreamWriter(File.Open(FileMode.Create, FileAccess.Write));
using var jwriter = new JsonTextWriter(swriter);
jwriter.Formatting = Formatting.Indented;
tok.WriteTo(jwriter);
}
catch (Exception e)
{
Logger.config.Error($"Error serializing value for {File.FullName}");
Logger.config.Error(e);
}
}
private JToken VisitToToken(Value val)
{
switch (val)
{
case Text t:
return new JValue(t.Value);
case Boolean b:
return new JValue(b.Value);
case Integer i:
return new JValue(i.Value);
case FloatingPoint f:
return new JValue(f.Value);
case List l:
var jarr = new JArray();
foreach (var tok in l.Select(VisitToToken)) jarr.Add(tok);
return jarr;
case Map m:
var jobj = new JObject();
foreach (var kvp in m) jobj.Add(kvp.Key, VisitToToken(kvp.Value));
return jobj;
case null:
return JValue.CreateNull();
default:
throw new ArgumentException($"Unsupported subtype of {nameof(Value)}");
}
}
}
}