using System;

using System.Threading.Tasks;

using JSONAPI.Documents;

using Newtonsoft.Json;

namespace JSONAPI.Json

{

/// <summary>

/// Default implementation of IErrorDocumentFormatter

/// </summary>

public class ErrorDocumentFormatter : IErrorDocumentFormatter

{

private readonly IErrorFormatter _errorFormatter;

private readonly IMetadataFormatter _metadataFormatter;

/// <summary>

/// Creates a new ErrorDocumentFormatter

/// </summary>

/// <param name="errorFormatter"></param>

/// <param name="metadataFormatter"></param>

public ErrorDocumentFormatter(IErrorFormatter errorFormatter, IMetadataFormatter metadataFormatter)

{

_errorFormatter = errorFormatter;

_metadataFormatter = metadataFormatter;

}

public Task Serialize(IErrorDocument document, JsonWriter writer)

{

writer.WriteStartObject();

writer.WritePropertyName("errors");

writer.WriteStartArray();

foreach (var error in document.Errors)

{

_errorFormatter.Serialize(error, writer);

}

writer.WriteEndArray();

if (document.Metadata != null)

{

writer.WritePropertyName("meta");

_metadataFormatter.Serialize(document.Metadata, writer);

}

writer.WriteEndObject();

return Task.FromResult(0);

}

public Task<IErrorDocument> Deserialize(JsonReader reader, string currentPath)

{

// The client should never be sending us errors.

throw new NotSupportedException();

}

}

}