Making a clean PR of the code

DocumentApi.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28307.168
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DocumentApi", "DocumentApi\DocumentApi.csproj", "{3672E5D4-A225-4D5B-AE2B-C94B75AEB2E4}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{3672E5D4-A225-4D5B-AE2B-C94B75AEB2E4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3672E5D4-A225-4D5B-AE2B-C94B75AEB2E4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3672E5D4-A225-4D5B-AE2B-C94B75AEB2E4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3672E5D4-A225-4D5B-AE2B-C94B75AEB2E4}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {DD3D7BD6-94D8-42DC-834A-5756A7AAEA16}
+	EndGlobalSection
+EndGlobal

DocumentApi/DocumentApi.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.9" />
+    <PackageReference Include="NUnit" Version="3.11.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.13.0" />
+  </ItemGroup>
+
+</Project>

DocumentApi/DocumentDto.cs

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+namespace DocumentApi
+{
+    public class DocumentDto
+    {
+        public string Id { get; set; }
+
+        public string Name { get; set; }
+
+        public string Content { get; set; }
+    }
+}

DocumentApi/DocumentRepository.cs

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+using System.Collections.Generic;
+using System.Data.SqlClient;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace DocumentApi
+{
+    public class DocumentRepository
+    {
+        public Task<IEnumerable<DocumentDto>> GetAllDocuments()
+        {
+            var connection = new SqlConnection("fake-connection-string");
+            var command = connection.CreateCommand();
+
+            var commandText = @"
+                SELECT *
+                FROM Documents
+            ";
+
+            command.CommandText = commandText;
+
+            var documents = new List<DocumentDto>();
+
+            var reader = command.ExecuteReaderAsync().Result;
+            while (reader.ReadAsync().Result)
+            {
+                var document = new DocumentDto();
+                document.Id = (string)reader[0];
+                document.Name = (string)reader[1];
+                document.Content = (string)reader[2];
+                documents.Add(document);
+            }
+
+            return Task.FromResult(documents.AsEnumerable());
+        }
+
+        public Task<DocumentDto> UploadDocument(DocumentDto document)
+        {
+            var connection = new SqlConnection("fake-connection-string");
+            var command = connection.CreateCommand();
+
+            var commandText = @"
+                INSERT INTO Documents (Name, Content)
+                VALUES (" + document.Name + "," + document.Content + @")
+            ";
+
+            command.CommandText = commandText;
+
+            var reader = command.ExecuteReaderAsync().Result;
+            while (reader.ReadAsync().Result)
+            {
+                document.Id = (string)reader[0];
+            }
+
+            return Task.FromResult(document);
+        }
+    }
+}

DocumentApi/DocumentTests.cs

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+using NUnit.Framework;
+
+namespace DocumentApi
+{
+    [TestFixture]
+    public class DocumentTests
+    {
+        [Test]
+        public void ShouldNotUploadDocumentsThatAlreadyExist()
+        {
+            Assert.Fail();
+        }
+
+        [Test]
+        public void ShouldUploadDocumentsThatDoNotAlreadyExist()
+        {
+            Assert.Fail();
+        }
+    }
+}

DocumentApi/DocumentsController.cs

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+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+
+namespace DocumentApi
+{
+    public class DocumentsController : ControllerBase
+    {
+        [HttpGet]
+        [Route("uploadDocuments")]
+        public Task<ActionResult<IEnumerable<DocumentDto>>> UploadDocuments(IEnumerable<DocumentDto> documents)
+        {
+            var documentRepository = new DocumentRepository();
+
+            var currentDocuments = documentRepository.GetAllDocuments().Result;
+
+            foreach (var document in documents)
+            {
+                var documentExists = false;
+
+                foreach (var currentDocument in currentDocuments)
+                {
+                    if (currentDocument.Name == document.Name)
+                    {
+                        documentExists = true;
+                    }
+                }
+
+                if (!documentExists)
+                {
+                    var createdDocument = documentRepository.UploadDocument(document).Result;
+                    document.Id = createdDocument.Id;
+                }
+            }
+
+            HttpContext.Response.StatusCode = 200;
+            return Task.FromResult(new ActionResult<IEnumerable<DocumentDto>>(documents));
+        }
+    }
+}

DocumentApi/Program.cs

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+namespace DocumentApi
+{
+    public class Program
+    {
+        public static void Main()
+        {
+        }
+    }
+}

README.md

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+This is an interview programming challenge. It is written poorly on purpose. Please don't judge me.