From a5ff547ecb008d21372e290a9a1fa66594c97979 Mon Sep 17 00:00:00 2001
From: Jovan Popovic <jocapc@gmail.com>
Date: Wed, 22 Jul 2020 21:30:28 +0200
Subject: [PATCH] Copied graphql

---
 RestApi/GraphQL/UriParser.cs | 52 ++++++++++++++++++++++++++++++++++++
 RestApi/RestApi.csproj       | 32 +++++++++++++++++++++-
 2 files changed, 83 insertions(+), 1 deletion(-)
 create mode 100644 RestApi/GraphQL/UriParser.cs

diff --git a/RestApi/GraphQL/UriParser.cs b/RestApi/GraphQL/UriParser.cs
new file mode 100644
index 0000000..31976f7
--- /dev/null
+++ b/RestApi/GraphQL/UriParser.cs
@@ -0,0 +1,52 @@
+// Copyright (c) Jovan Popovic. All Rights Reserved.
+// Licensed under the BSD License. See LICENSE.txt in the project root for license information.
+
+using Microsoft.AspNetCore.Http;
+using System;
+using TSql.RestApi;
+
+namespace TSql.GraphQL
+{
+
+#if NETSTANDARD2_0 || NETCOREAPP2_0 || NETCOREAPP2_1 || NETCOREAPP3_0 || NETCOREAPP3_1
+
+    using GraphQLParser;
+    using GraphQLParser.AST;
+
+    public class UriParser
+    {
+        public static QuerySpec Parse (TableSpec tabSpec, HttpRequest Request)
+        {
+            var spec = new QuerySpec();
+
+            var parser = new Parser(new Lexer());
+            GraphQLDocument document = parser.Parse(new Source(Request.Body.ToString()));
+            
+            /*
+            GraphQLFieldSelection selection = GetSelection(document);
+            BuildSelectExpandClause(spec, selection.SelectionSet);
+            BuildFilterClause(spec, selection);
+            LiftRequiredSingleNavigationPropertyFilter(spec);
+            */
+
+
+
+
+
+            spec.skip = Convert.ToInt32(Request.Query["start"]);
+            spec.top = Convert.ToInt32(Request.Query["length"]);
+            spec.select = null;//JQuery datatables don't provide column list.
+            if (Request.Query.ContainsKey("$systemat"))
+            {
+                spec.systemTimeAsOf = Request.Query["$systemat"];
+                DateTime asof;
+                if (!DateTime.TryParse(spec.systemTimeAsOf, out asof))
+                    throw new ArgumentException(spec.systemTimeAsOf + " is not valid date.");
+            }
+            tabSpec.Validate(spec, true);
+            return spec;
+        }
+
+    }
+#endif
+}
\ No newline at end of file
diff --git a/RestApi/RestApi.csproj b/RestApi/RestApi.csproj
index 1324c3e..6f185c5 100644
--- a/RestApi/RestApi.csproj
+++ b/RestApi/RestApi.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net46;netstandard1.6;netstandard2.0;netcoreapp1.0;netcoreapp1.1;netcoreapp2.0;netcoreapp2.1;netcoreapp3.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;net46;netstandard1.6;netstandard2.0;netcoreapp1.0;netcoreapp1.1;netcoreapp2.0;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
     <RootNamespace>TSql.RestApi</RootNamespace>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
@@ -54,4 +54,34 @@
     </Antlr4>
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+    <PackageReference Include="GraphQL-Parser">
+      <Version>5.1.2</Version>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.0'">
+    <PackageReference Include="GraphQL-Parser">
+      <Version>5.1.2</Version>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+    <PackageReference Include="GraphQL-Parser">
+      <Version>5.1.2</Version>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp2.1'">
+    <PackageReference Include="GraphQL-Parser">
+      <Version>5.1.2</Version>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp2.0'">
+    <PackageReference Include="GraphQL-Parser">
+      <Version>5.1.2</Version>
+    </PackageReference>
+  </ItemGroup>
+
 </Project>