add converter for product search facets (#375)

commercetools.Sdk/Tests/commercetools.Api.Serialization.Tests/ProductSearchDeserializationTest.cs

@@ -0,0 +1,38 @@
+using System.IO;
+using commercetools.Sdk.Api.Models.ProductSearches;
+using FluentAssertions;
+using Xunit;
+
+namespace commercetools.Api.Serialization.Tests
+{
+    public class ProductSearchDeserializationTest : IClassFixture<SerializationFixture>
+    {
+        private readonly SerializationFixture _serializationFixture;
+
+        public ProductSearchDeserializationTest(SerializationFixture serializationFixture)
+        {
+            this._serializationFixture = serializationFixture;
+        }
+
+        [Fact]
+        public void FacetDeserialization()
+        {
+            var serializerService = this._serializationFixture.SerializerService;
+            var serialized = File.ReadAllText("Resources/ProductSearch/facets.json");
+            var deserialized = serializerService.Deserialize<IProductPagedSearchResponse>(serialized);
+            Assert.NotNull(deserialized);
+            var facets = deserialized.Facets;
+            var bucket = Assert.IsAssignableFrom<IProductSearchFacetResultBucket>(facets[0]);
+            Assert.Equal("supplierName", bucket.Name);
+            Assert.Equal("Example Inc.", bucket.Buckets[0].Key);
+            Assert.Equal(77, bucket.Buckets[0].Count);
+            var count = Assert.IsAssignableFrom<IProductSearchFacetResultCount>(facets[1]);
+            Assert.Equal("supplierCounts", count.Name);
+            Assert.Equal(10, count.Value);
+
+            var serialize = serializerService.Serialize(deserialized);
+
+            Assert.Equal("{\"total\":0,\"offset\":0,\"limit\":0,\"facets\":[{\"name\":\"supplierName\",\"buckets\":[{\"key\":\"Example Inc.\",\"count\":77}]},{\"name\":\"supplierCounts\",\"value\":10}]}", serialize);
+        }
+    }
+}

commercetools.Sdk/Tests/commercetools.Api.Serialization.Tests/Resources/ProductSearch/facets.json

@@ -0,0 +1,20 @@
+{
+  "total":0,
+  "offset": 0,
+  "limit": 0,
+  "facets": [
+    {
+      "name": "supplierName",
+      "buckets": [
+        {
+          "key": "Example Inc.",
+          "count": 77
+        }
+      ]
+    },
+    {
+      "name": "supplierCounts",
+      "value": 10
+    }
+  ]
+}

commercetools.Sdk/commercetools.Sdk.Api/Serialization/JsonConverters/ProductSearchFacetConverter.cs

@@ -0,0 +1,80 @@
+using System.Collections.Generic;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using commercetools.Sdk.Api.Models.Products;
+using commercetools.Base.Serialization;
+using commercetools.Base.Serialization.MapperTypeRetrievers;
+using commercetools.Sdk.Api.Models.ProductSearches;
+using commercetools.Sdk.Api.Serialization.MapperTypeRetrievers;
+using Attribute = commercetools.Sdk.Api.Models.Products.Attribute;
+using Type = System.Type;
+
+namespace commercetools.Sdk.Api.Serialization.JsonConverters
+{
+    public class ProductSearchFacetConverter : JsonConverter<IProductSearchFacetResult>
+    {
+        private readonly ISerializerService _serializerService;
+
+        public ProductSearchFacetConverter(ISerializerService serializerService)
+        {
+            this._serializerService = serializerService;
+        }
+
+        public override bool CanConvert(Type typeToConvert)
+        {
+            return typeof(IProductSearchFacetResult).IsAssignableFrom(typeToConvert);
+        }
+
+        public override IProductSearchFacetResult Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            var jsonDocument = JsonDocument.ParseValue(ref reader);
+            IAttribute attribute;
+            var rootElement = jsonDocument.RootElement;
+            if (rootElement.ValueKind == JsonValueKind.Object)
+            {
+                var nameProp = rootElement.GetProperty("name");
+                if (rootElement.TryGetProperty("buckets", out var bucketsElement))
+                {
+                    return new ProductSearchFacetResultBucket
+                    {
+                        Name = nameProp.GetString(),
+                        Buckets = bucketsElement.ToObject<List<IProductSearchFacetResultBucketEntry>>(_serializerService)
+                    };
+                }
+                if (rootElement.TryGetProperty("value", out var valueElement))
+                {
+                    return new ProductSearchFacetResultCount
+                    {
+                        Name = nameProp.GetString(),
+                        Value = valueElement.GetInt64()
+                    };
+                }
+
+                return new ProductSearchFacetResult
+                {
+                    Name = nameProp.GetString()
+                };
+            }
+
+            return null;
+        }
+
+        public override void Write(Utf8JsonWriter writer, IProductSearchFacetResult value,
+            JsonSerializerOptions options)
+        {
+            writer.WriteStartObject();
+            writer.WriteString("name", value.Name);
+            if (value is ProductSearchFacetResultBucket bucket)
+            {
+                writer.WritePropertyName("buckets");
+                JsonSerializer.Serialize(writer, bucket.Buckets, options);
+            }
+            else if (value is ProductSearchFacetResultCount count) {
+                writer.WritePropertyName("value");
+                JsonSerializer.Serialize(writer, count.Value, options);
+            }
+
+            writer.WriteEndObject();
+        }
+    }
+}

commercetools.Sdk/commercetools.Sdk.Api/Serialization/SerializerService.cs

@@ -49,6 +49,7 @@ public SerializerService(
             _serializerOptions.Converters.Add(new MessageDeliveryConverter(this));
             _serializerOptions.Converters.Add(new CustomDateTimeConverter());
             _serializerOptions.Converters.Add(new CustomDateConverter());
+            _serializerOptions.Converters.Add(new ProductSearchFacetConverter(this));
             _serializerOptions.Converters.Add(new FieldContainerConverter(customFieldsMapperTypeRetriever, this));
             _serializerOptions.Converters.Add(new AttributeConverter(attributesMapperTypeRetriever, attributeTypeRetriever, this));
             _serializerOptions.Converters.Add(new DeserializeAsConverterFactory(