fix #1924 add support for render template

src/Nest/Nest.csproj

@@ -1084,6 +1084,9 @@
     <Compile Include="Search\SearchTemplate\DeleteSearchTemplate\DeleteSearchTemplateResponse.cs" />
     <Compile Include="Search\SearchTemplate\DeleteSearchTemplate\ElasticClient-DeleteSearchTemplate.cs" />
     <Compile Include="Search\SearchTemplate\ElasticClient-SearchTemplate.cs" />
+    <Compile Include="Search\SearchTemplate\RenderSearchTemplate\ElasticClient-RenderSearchTemplate.cs" />
+    <Compile Include="Search\SearchTemplate\RenderSearchTemplate\RenderSearchTemplateRequest.cs" />
+    <Compile Include="Search\SearchTemplate\RenderSearchTemplate\RenderSearchTemplateResponse.cs" />
     <Compile Include="Search\SearchTemplate\GetSearchTemplate\ElasticClient-GetSearchTemplate.cs" />
     <Compile Include="Search\SearchTemplate\GetSearchTemplate\GetSearchTemplateRequest.cs" />
     <Compile Include="Search\SearchTemplate\GetSearchTemplate\GetSearchTemplateResponse.cs" />

src/Nest/Search/SearchTemplate/RenderSearchTemplate/ElasticClient-RenderSearchTemplate.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Threading.Tasks;
+using Elasticsearch.Net;
+
+namespace Nest
+{
+	public partial interface IElasticClient
+	{
+		/// <inheritdoc/>
+		IRenderSearchTemplateResponse RenderSearchTemplate(Func<RenderSearchTemplateDescriptor, IRenderSearchTemplateRequest> selector);
+
+		/// <inheritdoc/>
+		IRenderSearchTemplateResponse RenderSearchTemplate(IRenderSearchTemplateRequest request);
+
+		/// <inheritdoc/>
+		Task<IRenderSearchTemplateResponse> RenderSearchTemplateAsync(Func<RenderSearchTemplateDescriptor, IRenderSearchTemplateRequest> selector);
+
+		/// <inheritdoc/>
+		Task<IRenderSearchTemplateResponse> RenderSearchTemplateAsync(IRenderSearchTemplateRequest request);
+	}
+	public partial class ElasticClient
+	{
+		public IRenderSearchTemplateResponse RenderSearchTemplate(Func<RenderSearchTemplateDescriptor, IRenderSearchTemplateRequest> selector) =>
+			this.RenderSearchTemplate(selector.InvokeOrDefault(new RenderSearchTemplateDescriptor()));
+
+		public IRenderSearchTemplateResponse RenderSearchTemplate(IRenderSearchTemplateRequest request) =>
+			this.Dispatcher.Dispatch<IRenderSearchTemplateRequest, RenderSearchTemplateRequestParameters, RenderSearchTemplateResponse>(
+				request,
+				(p, d) => this.LowLevelDispatch.RenderSearchTemplateDispatch<RenderSearchTemplateResponse>(p, d)
+			);
+
+		public Task<IRenderSearchTemplateResponse> RenderSearchTemplateAsync(Func<RenderSearchTemplateDescriptor, IRenderSearchTemplateRequest> selector) =>
+			this.RenderSearchTemplateAsync(selector.InvokeOrDefault(new RenderSearchTemplateDescriptor()));
+
+		public Task<IRenderSearchTemplateResponse> RenderSearchTemplateAsync(IRenderSearchTemplateRequest request) =>
+			this.Dispatcher.DispatchAsync<IRenderSearchTemplateRequest, RenderSearchTemplateRequestParameters, RenderSearchTemplateResponse, IRenderSearchTemplateResponse>(
+				request,
+				(p, d) => this.LowLevelDispatch.RenderSearchTemplateDispatchAsync<RenderSearchTemplateResponse>(p, d)
+			);
+	}
+}

src/Nest/Search/SearchTemplate/RenderSearchTemplate/RenderSearchTemplateRequest.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace Nest
+{
+	public partial interface IRenderSearchTemplateRequest
+	{
+		[JsonProperty("inline")]
+		string Inline { get; set; }
+
+		[JsonProperty("file")]
+		string File { get; set; }
+
+		[JsonProperty("params")]
+		[JsonConverter(typeof(VerbatimDictionaryKeysJsonConverter))]
+		Dictionary<string, object> Params { get; set; }
+
+	}
+
+	public partial class RenderSearchTemplateRequest
+	{
+		public string Inline { get; set; }
+		public string File { get; set; }
+		public Dictionary<string, object> Params { get; set; }
+	}
+
+
+	public partial class RenderSearchTemplateDescriptor
+	{
+		string IRenderSearchTemplateRequest.Inline { get; set; }
+		string IRenderSearchTemplateRequest.File { get; set; }
+		Dictionary<string, object> IRenderSearchTemplateRequest.Params { get; set; }
+
+		public RenderSearchTemplateDescriptor Inline(string inline) => Assign(a => a.Inline = inline);
+
+		public RenderSearchTemplateDescriptor File(string file) => Assign(a => a.File = file);
+
+		public RenderSearchTemplateDescriptor Params(Dictionary<string, object> scriptParams) => Assign(a => a.Params = scriptParams);
+
+		public RenderSearchTemplateDescriptor Params(Func<FluentDictionary<string, object>, FluentDictionary<string, object>> paramsSelector) =>
+			Assign(a => a.Params = paramsSelector?.Invoke(new FluentDictionary<string, object>()));
+
+	}
+}

src/Nest/Search/SearchTemplate/RenderSearchTemplate/RenderSearchTemplateResponse.cs

@@ -0,0 +1,16 @@
+using Newtonsoft.Json;
+
+namespace Nest
+{
+	public interface IRenderSearchTemplateResponse : IResponse
+	{
+		ILazyDocument TemplateOutput { get; set; }
+	}
+
+	[JsonObject]
+	public class RenderSearchTemplateResponse : ResponseBase, IRenderSearchTemplateResponse
+	{
+		[JsonProperty("template_output")]
+		public ILazyDocument TemplateOutput { get; set; }
+	}
+}

src/Tests/Search/SearchTemplate/RenderSearchTemplate/RenderSearchTemplateApiTests.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Elasticsearch.Net;
+using FluentAssertions;
+using Nest;
+using Tests.Framework;
+using Tests.Framework.Integration;
+using Xunit;
+
+namespace Tests.Search.SearchTemplate.RenderSearchTemplate
+{
+	[Collection(IntegrationContext.ReadOnly)]
+	public class RenderSearchTemplateApiTests : ApiIntegrationTestBase<IRenderSearchTemplateResponse, IRenderSearchTemplateRequest, RenderSearchTemplateDescriptor, RenderSearchTemplateRequest>
+	{
+		public RenderSearchTemplateApiTests(ReadOnlyCluster cluster, EndpointUsage usage) : base(cluster, usage) { }
+
+		protected override LazyResponses ClientUsage() => Calls(
+			fluent: (c, f) => c.RenderSearchTemplate(f),
+			fluentAsync: (c, f) => c.RenderSearchTemplateAsync(f),
+			request: (c, r) => c.RenderSearchTemplate(r),
+			requestAsync: (c, r) => c.RenderSearchTemplateAsync(r)
+		);
+
+		protected override HttpMethod HttpMethod => HttpMethod.POST;
+		protected override string UrlPath => $"/_render/template";
+		protected override int ExpectStatusCode => 200;
+		protected override bool ExpectIsValid => true;
+
+		private static string inlineSearchTemplate = @"
+{
+    ""query"": {
+      ""terms"": {
+        ""status"": [
+          ""{{#status}}"",
+          ""{{.}}"",
+          ""{{/status}}""
+        ]
+      }
+    }
+  }";
+		private string[] statusValues = new[] { "pending", "published" };
+
+		protected override Func<RenderSearchTemplateDescriptor, IRenderSearchTemplateRequest> Fluent => s=>s
+			.Inline(inlineSearchTemplate)
+			.Params(p=>p
+				.Add("status", statusValues)
+			);
+
+
+		protected override RenderSearchTemplateRequest Initializer => new RenderSearchTemplateRequest
+		{
+			Inline = inlineSearchTemplate,
+			Params = new Dictionary<string, object>
+			{
+				{ "status", statusValues }
+			}
+		};
+
+		[I] public Task AssertResponse() => this.AssertOnAllResponses(r =>
+		{
+			r.TemplateOutput.Should().NotBeNull();
+			var searchRequest = r.TemplateOutput.As<ISearchRequest>();
+			searchRequest.Should().NotBeNull();
+
+			searchRequest.Query.Should().NotBeNull();
+		});
+	}
+}

src/Tests/Search/SearchTemplate/RenderSearchTemplate/RenderSearchTemplateUrlTests.cs

@@ -0,0 +1,28 @@
+using System.Threading.Tasks;
+using Nest;
+using Tests.Framework;
+using static Tests.Framework.UrlTester;
+
+namespace Tests.Search.SearchTemplate.RenderSearchTemplate
+{
+	public class RenderSearchTemplateUrlTests
+	{
+		[U] public async Task Urls()
+		{
+			var id = "the-id";
+			await POST("/_render/template/the-id")
+				.Fluent(c => c.RenderSearchTemplate(s=>s.Id(id)))
+				.Request(c=>c.RenderSearchTemplate(new RenderSearchTemplateRequest(id)))
+				.FluentAsync(c => c.RenderSearchTemplateAsync(s=>s.Id(id)))
+				.RequestAsync(c=>c.RenderSearchTemplateAsync(new RenderSearchTemplateRequest(id)))
+				;
+
+			await POST("/_render/template")
+				.Fluent(c => c.RenderSearchTemplate(s=>s.Inline("")))
+				.Request(c=>c.RenderSearchTemplate(new RenderSearchTemplateRequest { Inline = "" }))
+				.FluentAsync(c => c.RenderSearchTemplateAsync(s=>s.Inline("")))
+				.RequestAsync(c=>c.RenderSearchTemplateAsync(new RenderSearchTemplateRequest { Inline = "" }))
+				;
+		}
+	}
+}

src/Tests/Tests.csproj

@@ -545,6 +545,8 @@
     <Compile Include="Search\Request\ProfileUsageTests.cs" />
     <Compile Include="Indices\StatusManagement\ForceMerge\ForceMergeApiTests.cs" />
     <Compile Include="Indices\StatusManagement\ForceMerge\ForceMergeUrlTests.cs" />
+    <Compile Include="Search\SearchTemplate\RenderSearchTemplate\RenderSearchTemplateApiTests.cs" />
+    <Compile Include="Search\SearchTemplate\RenderSearchTemplate\RenderSearchTemplateUrlTests.cs" />
     <None Include="index.asciidoc" />
     <None Include="paket.references" />
     <None Include="tests.yaml" />