public static IEnumerable GetFieldsForReload()

in src/Epam.GraphQL/Savers/DbContextSaver.cs [197:233]
29 lines of code
6 McCabe index (conditional complexity)

        public static IEnumerable<string> GetFieldsForReload<TExecutionContext>(ISaveResult<TExecutionContext> result, IResolveFieldContext context)
        {
            var initialDictionary = context.SubFields?.ToDictionary(kv => kv.Key, kv => kv.Value.Field);

            Guards.AssertIfNull(initialDictionary);

            if ((context.FieldDefinition.ResolvedType?.GetType().IsGenericType ?? false) && (context.FieldDefinition.ResolvedType?.GetType().GetGenericTypeDefinition() == typeof(MutationResultGraphType<,>)))
            {
                if (!initialDictionary.ContainsKey("payload"))
                {
                    return Enumerable.Empty<string>();
                }

                initialDictionary = initialDictionary["payload"].SelectionSet?.Selections
                    .Cast<GraphQLField>()
                    .ToDictionary(f => f.Name.StringValue)
                    ?? new Dictionary<string, GraphQLField>();
            }

            if (!initialDictionary.ContainsKey(result.FieldName))
            {
                return Enumerable.Empty<string>();
            }

            initialDictionary = initialDictionary[result.FieldName].SelectionSet?.Selections.Cast<GraphQLField>()
                .ToDictionary(f => f.Name.StringValue)
                ?? new Dictionary<string, GraphQLField>();

            if (!initialDictionary.ContainsKey("payload"))
            {
                return Enumerable.Empty<string>();
            }

            var fields = initialDictionary["payload"].GetSubFieldsNames(context.Document.Definitions.OfType<GraphQLFragmentDefinition>(), _ => true);

            return fields;
        }