private static async Task <SchemaFeatures> GetSchemaFeaturesAsync(
HttpClient httpClient,
HttpQueryClient queryClient)
{
var features = new SchemaFeatures();
var request = new HttpQueryRequest
{
Query = GetIntrospectionQuery(_phase1)
};
string json = await queryClient.FetchStringAsync(
request, httpClient)
.ConfigureAwait(false);
IntrospectionResult result =
JsonConvert.DeserializeObject <IntrospectionResult>(json);
FullType directive = result.Data.Schema.Types.First(t =>
t.Name.Equals(_directiveName, StringComparison.Ordinal));
features.HasRepeatableDirectives = directive.Fields.Any(t =>
t.Name.Equals(_isRepeatable, StringComparison.Ordinal));
features.HasDirectiveLocations = directive.Fields.Any(t =>
t.Name.Equals(_locations, StringComparison.Ordinal));
FullType schema = result.Data.Schema.Types.First(t =>
t.Name.Equals(_schemaName, StringComparison.Ordinal));
features.HasSubscriptionSupport = schema.Fields.Any(t =>
t.Name.Equals(_subscriptionType, StringComparison.Ordinal));
return(features);
}
private static DocumentNode CreateIntrospectionQuery(
SchemaFeatures features)
{
DocumentNode query = Parser.Default.Parse(
GetIntrospectionQuery(_phase2));
OperationDefinitionNode operation =
query.Definitions.OfType <OperationDefinitionNode>().First();
FieldNode schema =
operation.SelectionSet.Selections.OfType <FieldNode>().First();
FieldNode directives =
schema.SelectionSet.Selections.OfType <FieldNode>().First(t =>
t.Name.Value.Equals(_directivesField
, StringComparison.Ordinal));
var selections = directives.SelectionSet.Selections.ToList();
if (features.HasDirectiveLocations)
{
selections.Add(CreateField(_locations));
}
else
{
selections.Add(CreateField(_onField));
selections.Add(CreateField(_onFragment));
selections.Add(CreateField(_onOperation));
}
if (features.HasRepeatableDirectives)
{
selections.Add(CreateField(_isRepeatable));
}
FieldNode newField = directives.WithSelectionSet(
directives.SelectionSet.WithSelections(selections));
selections = schema.SelectionSet.Selections.ToList();
selections.Remove(directives);
selections.Add(newField);
newField = schema.WithSelectionSet(
schema.SelectionSet.WithSelections(selections));
selections = operation.SelectionSet.Selections.ToList();
selections.Remove(schema);
selections.Add(newField);
OperationDefinitionNode newOp = operation.WithSelectionSet(
operation.SelectionSet.WithSelections(selections));
var definitions = query.Definitions.ToList();
definitions.Remove(operation);
definitions.Insert(0, newOp);
return(query.WithDefinitions(definitions));
}
private static void RemoveSubscriptionIfNotSupported(
SchemaFeatures features,
ICollection <ISelectionNode> selections)
{
if (!features.HasSubscriptionSupport)
{
FieldNode subscriptionField = selections.OfType <FieldNode>()
.First(t => t.Name.Value.Equals(_subscriptionType,
StringComparison.Ordinal));
selections.Remove(subscriptionField);
}
}
private static async Task <DocumentNode> LoadSchemaInternalAsync(
HttpClient httpClient)
{
var queryClient = new HttpQueryClient();
SchemaFeatures features =
await GetSchemaFeaturesAsync(httpClient, queryClient)
.ConfigureAwait(false);
return(await ExecuteIntrospectionAsync(
httpClient, queryClient, features)
.ConfigureAwait(false));
}
public void IntrospectionWithoutDirectiveIsRepeatableField()
{
// arrange
var features = new SchemaFeatures
{
HasRepeatableDirectives = false
};
// act
DocumentNode document =
IntrospectionClient.CreateIntrospectionQuery(features);
// assert
QuerySyntaxSerializer.Serialize(document).MatchSnapshot();
}
public void IntrospectionWithSubscription()
{
// arrange
var features = new SchemaFeatures
{
HasSubscriptionSupport = true
};
// act
DocumentNode document =
IntrospectionClient.CreateIntrospectionQuery(features);
// assert
QuerySyntaxSerializer.Serialize(document).MatchSnapshot();
}
public void IntrospectionWithDirectiveLocationField()
{
// arrange
var features = new SchemaFeatures
{
HasDirectiveLocations = true
};
// act
DocumentNode document =
IntrospectionClient.CreateIntrospectionQuery(features);
// assert
QuerySyntaxSerializer.Serialize(document).MatchSnapshot();
}
internal static DocumentNode CreateIntrospectionQuery(
SchemaFeatures features)
{
DocumentNode query = Parser.Default.Parse(
GetIntrospectionQuery(_phase2));
OperationDefinitionNode operation =
query.Definitions.OfType <OperationDefinitionNode>().First();
FieldNode schema =
operation.SelectionSet.Selections.OfType <FieldNode>().First();
FieldNode directives =
schema.SelectionSet.Selections.OfType <FieldNode>().First(t =>
t.Name.Value.Equals(_directivesField,
StringComparison.Ordinal));
var selections = directives.SelectionSet.Selections.ToList();
AddDirectiveFeatures(features, selections);
FieldNode newField = directives.WithSelectionSet(
directives.SelectionSet.WithSelections(selections));
selections = schema.SelectionSet.Selections.ToList();
RemoveSubscriptionIfNotSupported(features, selections);
selections.Remove(directives);
selections.Add(newField);
newField = schema.WithSelectionSet(
schema.SelectionSet.WithSelections(selections));
selections = operation.SelectionSet.Selections.ToList();
selections.Remove(schema);
selections.Add(newField);
OperationDefinitionNode newOp = operation.WithSelectionSet(
operation.SelectionSet.WithSelections(selections));
var definitions = query.Definitions.ToList();
definitions.Remove(operation);
definitions.Insert(0, newOp);
return(query.WithDefinitions(definitions));
}
private static async Task <DocumentNode> ExecuteIntrospectionAsync(
HttpClient httpClient,
HttpQueryClient queryClient,
SchemaFeatures features)
{
DocumentNode query = CreateIntrospectionQuery(features);
var request = new HttpQueryRequest
{
Query = QuerySyntaxSerializer.Serialize(query)
};
string json = await queryClient.FetchStringAsync(
request, httpClient)
.ConfigureAwait(false);
return(IntrospectionDeserializer.Deserialize(json));
}
private static void AddDirectiveFeatures(
SchemaFeatures features,
ICollection <ISelectionNode> selections)
{
if (features.HasDirectiveLocations)
{
selections.Add(CreateField(_locations));
}
else
{
selections.Add(CreateField(_onField));
selections.Add(CreateField(_onFragment));
selections.Add(CreateField(_onOperation));
}
if (features.HasRepeatableDirectives)
{
selections.Add(CreateField(_isRepeatable));
}
}
private static async Task <DocumentNode> ExecuteIntrospectionAsync(
HttpClient httpClient,
HttpQueryClient queryClient,
SchemaFeatures features)
{
DocumentNode query = CreateIntrospectionQuery(features);
var request = new HttpQueryRequest
{
Query = QuerySyntaxSerializer.Serialize(query),
OperationName = "introspection_phase_2"
};
(string json, HttpResponseMessage _)response =
await queryClient.FetchStringAsync(
request, httpClient)
.ConfigureAwait(false);
return(IntrospectionDeserializer.Deserialize(response.json));
}