protected JsonMemberInfo GetMemberInfo(JsonPath path, JToken data, JsonMemberInfo parent)
{
var info = new JsonMemberInfo { Value = data.ToString(), Parent = parent, Path = path };
if (data.Type == JTokenType.Array)
{
info.Children = new SortedDictionary<string, JsonMemberInfo>();
info.IsArray = true;
var idx = 0;
foreach (var entry in ((IList<JToken>)data))
{
var key = idx.ToString(CultureInfo.InvariantCulture);
var newPath = new JsonPath { Property = key, IsIndexer = true };
newPath.Prev = path.Clone(newPath);
info.Children.Add(key, this.GetMemberInfo(newPath, entry, info));
idx++;
}
}
if (data.Type == JTokenType.Object)
{
info.Children = new SortedDictionary<string, JsonMemberInfo>();
info.IsObject = true;
foreach (var entry in ((IDictionary<string, JToken>)data))
{
var newPath = new JsonPath { Property = entry.Key, IsIndexer = false };
newPath.Prev = path.Clone(newPath);
info.Children.Add(entry.Key, this.GetMemberInfo(newPath, entry.Value, info));
}
}
if (data.Type == JTokenType.Boolean)
{
info.Value = Convert.ToBoolean(data.ToString());
}
if (data.Type == JTokenType.Float)
{
info.Value = Convert.ToDouble(data.ToString());
}
if (data.Type == JTokenType.Integer)
{
info.Value = Convert.ToInt32(data.ToString());
}
if (data.Type == JTokenType.Guid)
{
info.Value = new Guid(data.ToString());
}
if (data.Type == JTokenType.String)
{
info.Value = Convert.ToString(data.ToString());
}
if (data.Type == JTokenType.Null)
{
info.Value = null;
}
if (data.Type == JTokenType.Date)
{
info.Value = DateTime.Parse(data.ToString());
}
return info;
}
public string ApplyPatch(IEnumerable<JsonPatchBase> patches, string json)
{
var graph = _serializer.Deserialize(json);
if (patches == null)
{
return json;
}
foreach (var patch in patches)
{
if (patch.Operation == JsonDiffPatchOperation.Remove)
{
var root = patch.Path.GetRoot();
var memberInfo = graph.FindByPath(root, patch.Path);
if (memberInfo != null)
{
if (memberInfo.Parent != null)
{
memberInfo.Parent.Children.Remove(memberInfo.Parent.Children.Single(x => x.Value == memberInfo).Key);
}
else
{
if (memberInfo == graph)
{
graph = new JsonMemberInfo { Path = new JsonPath { Property = "$" } };
}
else
{
throw new Exception("Invalid JSON Graph Structure!");
}
}
}
else
{
throw new Exception("Invalid JSON Structure!");
}
}
if (patch.Operation == JsonDiffPatchOperation.Add)
{
if (patch.Element is int)
{
var root = patch.Path.GetRoot();
var memberInfo = graph.FindByPath(root, patch.Path);
if (memberInfo != null)
{
if (memberInfo.IsArray)
{
var key = Convert.ToString(patch.Element);
if (!memberInfo.Children.ContainsKey(key))
{
var info = new JsonMemberInfo
{
Parent = memberInfo,
Path = new JsonPath { IsIndexer = true, Property = key },
Value = patch.Value
};
info.Path.Prev = memberInfo.Path.Clone(info.Path);
memberInfo.Children.Add(key, info);
}
else
{
throw new Exception("Invalid JSON Structure! Index already exists.");
}
}
else
{
throw new Exception("Invalid JSON Structure! Not an Array.");
}
}
else
{
throw new Exception("Invalid JSON Structure!");
}
}
if (patch.Element is string)
{
var root = patch.Path.GetRoot();
var memberInfo = graph.FindByPath(root, patch.Path);
if (memberInfo != null)
{
if (memberInfo.IsObject)
{
var key = Convert.ToString(patch.Element);
if (!memberInfo.Children.ContainsKey(key))
{
var info = new JsonMemberInfo
{
Parent = memberInfo,
Path = new JsonPath { IsIndexer = false, Property = key },
Value = patch.Value
};
info.Path.Prev = memberInfo.Path.Clone(info.Path);
memberInfo.Children.Add(key, info);
}
else
{
throw new Exception("Invalid JSON Structure! Property already exists.");
}
}
else
{
throw new Exception("Invalid JSON Structure! Not an Object.");
}
}
else
{
throw new Exception("Invalid JSON Structure!");
}
}
}
}
return graph.ToJson(this._serializer);
}