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.";
}
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.";
}
private static void PatchForObject(JsonElement orig, JsonElement mod, List <PatchOperation> patch, JsonPointer path)
{
var origNames = orig.EnumerateObject().Select(x => x.Name).ToArray();
var modNames = mod.EnumerateObject().Select(x => x.Name).ToArray();
foreach (var k in origNames.Except(modNames))
{
patch.Add(PatchOperation.Remove(path.Combine(k)));
}
foreach (var k in modNames.Except(origNames))
{
var prop = mod.EnumerateObject().First(p => p.NameEquals(k));
patch.Add(PatchOperation.Add(path.Combine(k), prop.Value));
}
foreach (var k in origNames.Intersect(modNames))
{
var origProp = orig.EnumerateObject().First(p => p.NameEquals(k));
var modProp = mod.EnumerateObject().First(p => p.NameEquals(k));
if (origProp.Value.ValueKind != modProp.Value.ValueKind)
{
patch.Add(PatchOperation.Replace(JsonPointer.Parse(path + modProp.Name), modProp.Value));
}
else if (!string.Equals(origProp.Value.ToString(), modProp.Value.ToString())) // TODO
{
if (origProp.Value.ValueKind == JsonValueKind.Object)
{
PatchForObject(origProp.Value, modProp.Value, patch, path.Combine(modProp.Name));
}
else if (origProp.Value.ValueKind == JsonValueKind.Array)
{
PatchForArray(origProp.Value, modProp.Value, patch, path.Combine(modProp.Name));
}
else
{
patch.Add(PatchOperation.Replace(path.Combine(modProp.Name), modProp.Value));
}
}
}
}
private static void PatchForArray(JsonElement orig, JsonElement mod, List <PatchOperation> patch, JsonPointer path)
{
for (int i = 0; i < Math.Max(orig.GetArrayLength(), mod.GetArrayLength()); i++)
{
var ui = (uint)i;
if (i >= orig.GetArrayLength())
{
patch.Add(PatchOperation.Add(path.Combine(ui), mod[i]));
continue;
}
if (i >= mod.GetArrayLength())
{
patch.Add(PatchOperation.Remove(path.Combine(ui)));
continue;
}
var origObject = orig[i];
var modObject = mod[i];
if (origObject.ValueKind != modObject.ValueKind)
{
patch.Add(PatchOperation.Replace(path.Combine("/" + i), modObject));
}
else if (!string.Equals(origObject.ToString(), modObject.ToString())) // TODO
{
if (origObject.ValueKind == JsonValueKind.Object)
{
PatchForObject(origObject, modObject, patch, path.Combine(ui));
}
else if (origObject.ValueKind == JsonValueKind.Array)
{
PatchForArray(origObject, modObject, patch, path.Combine(ui));
}
else
{
patch.Add(PatchOperation.Replace(path.Combine(ui), modObject));
}
}
}
}
