public void Process(PatchContext context, PatchOperation operation)
{
var current = context.Source;
var message = EditableJsonElementHelpers.FindParentOfTarget(ref current, operation.Path);
if (message != null)
{
context.Message = message;
return;
}
var from = context.Source;
message = EditableJsonElementHelpers.FindTarget(ref from, operation.From);
if (message != null)
{
context.Message = message;
return;
}
if (operation.Path.Segments.Length == 0)
{
context.Source = from;
return;
}
var last = operation.Path.Segments.Last();
if (current.Object != null)
{
current.Object[last.Value] = from;
return;
}
if (current.Array != null)
{
if (last.Value == "-")
{
current.Array.Add(from);
return;
}
if (!int.TryParse(last.Value, out var index) || 0 > index || index > current.Array.Count)
{
context.Message = $"Path `{operation.Path}` is not present in the instance.";
return;
}
if ((index != 0 && last.Value[0] == '0') ||
(index == 0 && last.Value.Length > 1))
{
context.Message = $"Path `{operation.Path}` is not present in the instance.";
return;
}
current.Array.Insert(index, from);
return;
}
context.Message = $"Path `{operation.Path}` is not present in the instance.";
}
public void Process(PatchContext context, PatchOperation operation)
{
if (operation.Path.Segments.Length == 0)
{
context.Message = "Cannot remove root value.";
return;
}
var current = context.Source;
var message = EditableJsonElementHelpers.FindParentOfTarget(ref current, operation.Path);
if (message != null)
{
context.Message = message;
return;
}
var last = operation.Path.Segments.Last();
if (current.Object != null)
{
if (!current.Object.TryGetValue(last.Value, out _))
{
context.Message = $"Path `{operation.Path}` is not present in the instance.";
return;
}
current.Object.Remove(last.Value);
return;
}
if (current.Array != null)
{
if (last.Value == "-")
{
current.Array.RemoveAt(current.Array.Count - 1);
return;
}
if (!int.TryParse(last.Value, out var index) || 0 > index || index >= current.Array.Count)
{
context.Message = $"Path `{operation.Path}` is not present in the instance.";
return;
}
if ((index != 0 && last.Value[0] == '0') ||
(index == 0 && last.Value.Length > 1))
{
context.Message = $"Path `{operation.Path}` is not present in the instance.";
return;
}
current.Array.RemoveAt(index);
return;
}
context.Message = $"Path `{operation.Path}` is not present in the instance.";
}
/// <summary>
/// Applies the patch to a JSON document.
/// </summary>
/// <param name="source">The JSON document.</param>
/// <returns>A result object containing the output JSON and a possible error message.</returns>
public PatchResult Apply(JsonElement source)
{
var context = new PatchContext(new EditableJsonElement(source));
foreach (var operation in Operations)
{
operation.Handle(context);
if (context.Message != null)
{
break;
}
context.Index++;
}
return(new PatchResult(context));
}
public void Process(PatchContext context, PatchOperation operation)
{
var current = context.Source;
var message = EditableJsonElementHelpers.FindTarget(ref current, operation.Path);
if (message != null)
{
context.Message = message;
return;
}
if (current.ToElement().IsEquivalentTo(operation.Value))
{
return;
}
context.Message = $"Path `{operation.Path}` is not equal to the indicated value.";
}
internal PatchResult(PatchContext context)
{
Result = context.Source.ToElement();
Error = context.Message;
Operation = context.Index;
}