feat(document-builder): apply request meta

Author: jaredcnance

src/JsonApiDotNetCore/Builders/DocumentBuilder.cs

@@ -12,11 +12,13 @@ public class DocumentBuilder
     {
         private IJsonApiContext _jsonApiContext;
         private IContextGraph _contextGraph;
+        private readonly IRequestMeta _requestMeta;
 
-        public DocumentBuilder(IJsonApiContext jsonApiContext)
+        public DocumentBuilder(IJsonApiContext jsonApiContext, IRequestMeta requestMeta)
         {
             _jsonApiContext = jsonApiContext;
             _contextGraph = jsonApiContext.ContextGraph;
+            _requestMeta = requestMeta;
         }
 
         public Document Build(IIdentifiable entity)
@@ -71,6 +73,10 @@ private Dictionary<string, object> _getMeta(IIdentifiable entity)
             if(_jsonApiContext.Options.IncludeTotalRecordCount)
                 builder.Add("total-records", _jsonApiContext.PageManager.TotalRecords);
 
+            var requestMeta = _requestMeta?.GetMeta();
+            if(requestMeta != null)
+                builder.Add(requestMeta);
+
             var meta = builder.Build();
             if(meta.Count > 0) return meta;
             return null;

src/JsonApiDotNetCore/Formatters/JsonApiOutputFormatter.cs

@@ -32,6 +32,8 @@ public async Task WriteAsync(OutputFormatterWriteContext context)
             var logger = GetService<ILoggerFactory>(context)?
                 .CreateLogger<JsonApiOutputFormatter>();
 
+            var requestMeta = GetService<IRequestMeta>(context);
+
             logger?.LogInformation("Formatting response as JSONAPI");
 
             var response = context.HttpContext.Response;
@@ -43,7 +45,7 @@ public async Task WriteAsync(OutputFormatterWriteContext context)
                 string responseContent;
                 try
                 {
-                    responseContent = GetResponseBody(context.Object, jsonApiContext, logger);
+                    responseContent = GetResponseBody(context.Object, jsonApiContext, requestMeta, logger);
                 }
                 catch (Exception e)
                 {
@@ -64,15 +66,18 @@ private T GetService<T>(OutputFormatterWriteContext context)
             return context.HttpContext.RequestServices.GetService<T>();
         }
 
-        private string GetResponseBody(object responseObject, IJsonApiContext jsonApiContext, ILogger logger)
+        private string GetResponseBody(object responseObject, 
+            IJsonApiContext jsonApiContext, 
+            IRequestMeta requestMeta, 
+            ILogger logger)
         {
             if (responseObject == null)
                 return GetNullDataResponse();
 
             if (responseObject.GetType() == typeof(Error) || jsonApiContext.RequestEntity == null)
                 return GetErrorJson(responseObject, logger);
 
-            return JsonApiSerializer.Serialize(responseObject, jsonApiContext);
+            return JsonApiSerializer.Serialize(responseObject, jsonApiContext, requestMeta);
         }
 
         private string GetNullDataResponse()

src/JsonApiDotNetCore/Serialization/JsonApiSerializer.cs

@@ -8,24 +8,25 @@ namespace JsonApiDotNetCore.Serialization
 {
     public static class JsonApiSerializer
     {
-        public static string Serialize(object entity, IJsonApiContext jsonApiContext)
+        public static string Serialize(object entity, IJsonApiContext jsonApiContext, IRequestMeta requestMeta)
         {
             if (entity is IEnumerable<IIdentifiable>)
-                return _serializeDocuments(entity, jsonApiContext);
-            return _serializeDocument(entity, jsonApiContext);           
+                return _serializeDocuments(entity, jsonApiContext, requestMeta);
+
+            return _serializeDocument(entity, jsonApiContext, requestMeta);           
         }
 
-        private static string _serializeDocuments(object entity, IJsonApiContext jsonApiContext)
+        private static string _serializeDocuments(object entity, IJsonApiContext jsonApiContext, IRequestMeta requestMeta)
         {
-            var documentBuilder = new DocumentBuilder(jsonApiContext);
+            var documentBuilder = new DocumentBuilder(jsonApiContext, requestMeta);
             var entities = entity as IEnumerable<IIdentifiable>;
             var documents = documentBuilder.Build(entities);
             return _serialize(documents);
         }
 
-        private static string _serializeDocument(object entity, IJsonApiContext jsonApiContext)
+        private static string _serializeDocument(object entity, IJsonApiContext jsonApiContext, IRequestMeta requestMeta)
         {
-            var documentBuilder = new DocumentBuilder(jsonApiContext);
+            var documentBuilder = new DocumentBuilder(jsonApiContext, requestMeta);
             var identifiableEntity = entity as IIdentifiable;
             var document = documentBuilder.Build(identifiableEntity);
             return _serialize(document);