// unflatten
static JsonDocumentBuilder SafeUnflatten(JsonDocumentBuilder value)
{
if (value.ValueKind != JsonValueKind.Object || value.GetObjectLength() == 0)
{
return value;
}
bool safe = true;
int index = 0;
foreach (var item in value.EnumerateObject())
{
int n;
if (!int.TryParse(item.Key, out n) || index++ != n)
{
safe = false;
break;
}
}
if (safe)
{
var j = new JsonDocumentBuilder(JsonValueKind.Array);
foreach (var item in value.EnumerateObject())
{
j.AddArrayItem(item.Value);
}
var a = new JsonDocumentBuilder(JsonValueKind.Array);
foreach (var item in j.EnumerateArray())
{
a.AddArrayItem(SafeUnflatten(item));
}
return a;
}
else
{
var o = new JsonDocumentBuilder(JsonValueKind.Object);
foreach (var item in value.EnumerateObject())
{
//if (!o.ContainsPropertyName(item.Key))
//{
// o.AddProperty(item.Key, SafeUnflatten (item.Value));
//}
o.TryAddProperty(item.Key, SafeUnflatten (item.Value));
}
return o;
}
}
static JsonDocumentBuilder _FromDiff(JsonElement source,
JsonElement target,
string path)
{
var builder = new JsonDocumentBuilder(JsonValueKind.Array);
JsonElementEqualityComparer comparer = JsonElementEqualityComparer.Instance;
if (comparer.Equals(source, target))
{
return(builder);
}
if (source.ValueKind == JsonValueKind.Array && target.ValueKind == JsonValueKind.Array)
{
int common = Math.Min(source.GetArrayLength(), target.GetArrayLength());
for (int i = 0; i < common; ++i)
{
var buffer = new StringBuilder(path);
buffer.Append("/");
buffer.Append(i.ToString());
var temp_diff = _FromDiff(source[i], target[i], buffer.ToString());
foreach (var item in temp_diff.EnumerateArray())
{
builder.AddArrayItem(item);
}
}
// Element in source, not in target - remove
for (int i = source.GetArrayLength(); i-- > target.GetArrayLength();)
{
var buffer = new StringBuilder(path);
buffer.Append("/");
buffer.Append(i.ToString());
var valBuilder = new JsonDocumentBuilder(JsonValueKind.Object);
valBuilder.AddProperty("op", new JsonDocumentBuilder("remove"));
valBuilder.AddProperty("path", new JsonDocumentBuilder(buffer.ToString()));
builder.AddArrayItem(valBuilder);
}
// Element in target, not in source - add,
for (int i = source.GetArrayLength(); i < target.GetArrayLength(); ++i)
{
var a = target[i];
var buffer = new StringBuilder(path);
buffer.Append("/");
buffer.Append(i.ToString());
var valBuilder = new JsonDocumentBuilder(JsonValueKind.Object);
valBuilder.AddProperty("op", new JsonDocumentBuilder("add"));
valBuilder.AddProperty("path", new JsonDocumentBuilder(buffer.ToString()));
valBuilder.AddProperty("value", new JsonDocumentBuilder(a));
builder.AddArrayItem(valBuilder);
}
}
else if (source.ValueKind == JsonValueKind.Object && target.ValueKind == JsonValueKind.Object)
{
foreach (var a in source.EnumerateObject())
{
var buffer = new StringBuilder(path);
buffer.Append("/");
buffer.Append(JsonPointer.Escape(a.Name));
JsonElement element;
if (target.TryGetProperty(a.Name, out element))
{
var temp_diff = _FromDiff(a.Value, element, buffer.ToString());
foreach (var item in temp_diff.EnumerateArray())
{
builder.AddArrayItem(item);
}
}
else
{
var valBuilder = new JsonDocumentBuilder(JsonValueKind.Object);
valBuilder.AddProperty("op", new JsonDocumentBuilder("remove"));
valBuilder.AddProperty("path", new JsonDocumentBuilder(buffer.ToString()));
builder.AddArrayItem(valBuilder);
}
}
foreach (var a in target.EnumerateObject())
{
JsonElement element;
if (!source.TryGetProperty(a.Name, out element))
{
var buffer = new StringBuilder(path);
buffer.Append("/");
buffer.Append(JsonPointer.Escape(a.Name));
var valBuilder = new JsonDocumentBuilder(JsonValueKind.Object);
valBuilder.AddProperty("op", new JsonDocumentBuilder("add"));
valBuilder.AddProperty("path", new JsonDocumentBuilder(buffer.ToString()));
valBuilder.AddProperty("value", new JsonDocumentBuilder(a.Value));
builder.AddArrayItem(valBuilder);
}
}
}
else
{
var valBuilder = new JsonDocumentBuilder(JsonValueKind.Object);
valBuilder.AddProperty("op", new JsonDocumentBuilder("replace"));
valBuilder.AddProperty("path", new JsonDocumentBuilder(path));
valBuilder.AddProperty("value", new JsonDocumentBuilder(target));
builder.AddArrayItem(valBuilder);
}
return(builder);
}
public static bool TryAdd(this JsonPointer location,
ref JsonDocumentBuilder root,
JsonDocumentBuilder value)
{
JsonDocumentBuilder current = root;
string token = "";
var enumerator = location.GetEnumerator();
bool more = enumerator.MoveNext();
if (!more)
{
return(false);
}
while (more)
{
token = enumerator.Current;
more = enumerator.MoveNext();
if (more)
{
if (!TryResolve(token, current, out current))
{
return(false);
}
}
}
if (current.ValueKind == JsonValueKind.Array)
{
if (token.Length == 1 && token[0] == '-')
{
current.AddArrayItem(value);
current = current[current.GetArrayLength() - 1];
}
else
{
int index;
if (!int.TryParse(token, out index))
{
return(false);
}
if (index > current.GetArrayLength())
{
return(false);
}
if (index == current.GetArrayLength())
{
current.AddArrayItem(value);
current = value;
}
else
{
current.InsertArrayItem(index, value);
current = value;
}
}
}
else if (current.ValueKind == JsonValueKind.Object)
{
if (current.ContainsPropertyName(token))
{
current.RemoveProperty(token);
}
current.AddProperty(token, value);
current = value;
}
else
{
return(false);
}
return(true);
}
static bool TryUnflattenArray(JsonElement value, out JsonDocumentBuilder result)
{
if (value.ValueKind != JsonValueKind.Object)
{
throw new ArgumentException("The value to unflatten is not a JSON object");
}
result = new JsonDocumentBuilder(JsonValueKind.Object);
foreach (var item in value.EnumerateObject())
{
JsonDocumentBuilder? parent = null;
JsonDocumentBuilder part = result;
int parentIndex = 0;
string parentName = "";
JsonPointer ptr;
if (!JsonPointer.TryParse(item.Name, out ptr))
{
throw new ArgumentException("Name contains invalid JSON Pointer");
}
int index = 0;
var it = ptr.GetEnumerator();
bool more = it.MoveNext();
while (more)
{
string token = it.Current;
int n;
if (int.TryParse(token, out n) && index++ == n)
{
if (part.ValueKind != JsonValueKind.Array)
{
if (parent != null && parent.ValueKind == JsonValueKind.Object)
{
parent.RemoveProperty(parentName);
var val = new JsonDocumentBuilder(JsonValueKind.Array);
parent.AddProperty(parentName, val);
part = val;
}
else if (parent != null && parent.ValueKind == JsonValueKind.Array)
{
var val = new JsonDocumentBuilder(JsonValueKind.Array);
parent[parentIndex] = val;
part = val;
}
else
{
return false;
}
}
parent = part;
parentIndex = n;
parentName = token;
more = it.MoveNext();
if (more)
{
if (n >= part.GetArrayLength())
{
part.AddArrayItem(new JsonDocumentBuilder(JsonValueKind.Object));
part = part[part.GetArrayLength() - 1];
}
else
{
part = part[n];
}
}
else
{
part.AddArrayItem(new JsonDocumentBuilder(item.Value));
part = part[part.GetArrayLength() - 1];
}
}
else if (part.ValueKind == JsonValueKind.Object)
{
more = it.MoveNext();
if (more)
{
JsonDocumentBuilder val;
if (part.TryGetProperty(token, out val))
{
part = val;
}
else
{
val = new JsonDocumentBuilder(JsonValueKind.Object);
part.AddProperty(token,val);
part = val;
}
}
else
{
JsonDocumentBuilder val;
if (part.TryGetProperty(token, out val))
{
part = val;
}
else
{
val = new JsonDocumentBuilder(item.Value);
part.AddProperty(token,val);
part = val;
}
}
}
else
{
return false;
}
}
}
return true;
}