private Resource BuildPatch(object model)
{
var originalResource = ModelRegistry.GetResource(model);
var modelRtlns = ModelRegistry.GetRelationshipValues(model) ?? new Dictionary <string, Relationship>();
var originalRtlns = originalResource.Relationships ?? new Dictionary <string, Relationship>();
var patchRtlns = modelRtlns.Where(modelRltn =>
{
originalRtlns.TryGetValue(modelRltn.Key, out var ogRtln);
// JToken.DeepEquals does not work here
return(!JsonComparer.Equals(ogRtln?.Data, modelRltn.Value?.Data));
}).ToDictionary(x => x.Key, x => x.Value);
var modelAttrs = ModelRegistry.GetAttributeValues(model) ?? new JObject();
var originalAttrs = originalResource.Attributes ?? new JObject();
var modelMetas = ModelRegistry.GetMetaValues(model) ?? new JObject();
var originalMetas = originalResource.Meta ?? new JObject();
// Links are not patched
var patchAttrs = (JObject)JsonDiff.ReducePatch(originalAttrs, modelAttrs);
var patchMetas = (JObject)JsonDiff.ReducePatch(originalMetas, modelMetas);
if (patchAttrs == null &&
!patchRtlns.Any() &&
patchMetas == null)
{
// Nothing to update
return(null);
}
return(new Resource
{
Id = originalResource.Id,
Type = originalResource.Type,
Attributes = patchAttrs,
Relationships = patchRtlns.Any() ? patchRtlns : null,
Meta = patchMetas
});
}