Add request inputs to ValidationContext (graphql-dotnet#633)

Author: gingermike

src/GraphQL/Execution/DocumentExecuter.cs

@@ -149,7 +149,8 @@ public async Task<ExecutionResult> ExecuteAsync(ExecutionOptions options)
                         options.Schema,
                         document,
                         options.ValidationRules,
-                        options.UserContext);
+                        options.UserContext,
+                        options.Inputs);
                 }
 
                 if (options.ComplexityConfiguration != null && validationResult.IsValid)

src/GraphQL/Validation/DocumentValidator.cs

@@ -13,7 +13,8 @@ IValidationResult Validate(
             ISchema schema,
             Document document,
             IEnumerable<IValidationRule> rules = null,
-            object userContext = null);
+            object userContext = null,
+            Inputs inputs = null);
     }
 
     public class DocumentValidator : IDocumentValidator
@@ -23,7 +24,8 @@ public IValidationResult Validate(
             ISchema schema,
             Document document,
             IEnumerable<IValidationRule> rules = null,
-            object userContext = null)
+            object userContext = null,
+            Inputs inputs = null)
         {
             if (!schema.Initialized)
             {
@@ -36,7 +38,8 @@ public IValidationResult Validate(
                 Schema = schema,
                 Document = document,
                 TypeInfo = new TypeInfo(schema),
-                UserContext = userContext
+                UserContext = userContext,
+                Inputs = inputs
             };
 
             if (rules == null)

src/GraphQL/Validation/ValidationContext.cs

@@ -29,6 +29,8 @@ private readonly Dictionary<Operation, IEnumerable<FragmentDefinition>> _fragmen
         public object UserContext { get; set; }
 
         public IEnumerable<ValidationError> Errors => _errors;
+        
+        public Inputs Inputs { get; set; }
 
         public void ReportError(ValidationError error)
         {