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