initial commit

.gitignore

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+# Windows ignores
+Thumbs.db
+Thumbs.db.meta
+
+# Mac ignores
+*.DS_Store
+*.directory
+
+# Add your custom repo-wide rules below: 

README.md

@@ -1,2 +1,19 @@
-# contenda-dotnet-sdk
-Contenda .NET SDK
+# Contenda .NET SDK
+
+**Contenda** is the content catalyst for developer advocates. 
+
+A .NET Standard 2.0 library to help you use Contenda's APIs in your .NET projects!
+
+![](https://img.shields.io/badge/platform-any-green.svg?longCache=true&style=flat-square) ![](https://img.shields.io/badge/nuget-yes-green.svg?longCache=true&style=flat-square) ![](https://img.shields.io/badge/license-MIT-blue.svg?longCache=true&style=flat-square)
+
+## Usage
+
+Refer to the `Contenda.SdkDemo` project to see example code using this SDK.
+
+Make sure to call `Authenticate` before calling any APIs that require authentication - presently this includes all of them, except for the service health endpoint.
+
+## Need more help?
+
+💡 Read more about Contenda's API here https://prod.contenda.io/docs.
+
+💬 Find us on twitter [@ContendaCo](https://twitter.com/ContendaCo) or join our public [Discord](https://discord.gg/bYda4pQz2v).

sources/Contenda/.gitignore

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+# Created by https://www.gitignore.io/api/visualstudio
+
+### VisualStudio ###
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+# x64/
+# x86/
+build/
+bld/
+[Bb]in/
+[Oo]bj/
+
+# Visual Studio 2015 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# DNX
+project.lock.json
+artifacts/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.obj
+*.meta
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+*.cachefile
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings 
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+
+# Windows Azure Build Output
+csx/
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+[Ss]tyle[Cc]op.*
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+# *.pfx
+*.publishsettings
+node_modules/
+orleans.codegen.cs
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions

sources/Contenda/Contenda.Sdk/Auth/APIKeyAuthProvider.cs

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+using System;
+using System.IdentityModel.Tokens.Jwt;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+using System.Web;
+using Contenda.Sdk.Exceptions;
+using Contenda.Sdk.Models.Request;
+using Contenda.Sdk.Models.Result;
+using Newtonsoft.Json;
+
+namespace Contenda.Sdk.Auth
+{
+    /// <summary>
+    /// API Key Authentication Provider
+    /// </summary>
+    public sealed class APIKeyAuthProvider : IAuthProvider
+    {
+        private readonly string _email;
+        private readonly string _apiKey;
+
+        private readonly DateTime _invalidDate = new(1970, 1, 1);
+
+        private string? _apiToken;
+
+        /// <summary>
+        /// Constructor for an API key auth provider
+        /// </summary>
+        /// <param name="email">user's email</param>
+        /// <param name="apiKey">api key</param>
+        public APIKeyAuthProvider(string email, string apiKey)
+        {
+            _email = email;
+            _apiKey = apiKey;
+        }
+
+        private DateTime ValidUntil()
+        {
+            if (_apiToken == null) return _invalidDate;
+            try
+            {
+                var handler = new JwtSecurityTokenHandler();
+                var token = handler.ReadJwtToken(_apiToken);
+                return token.ValidTo;
+            }
+            catch
+            {
+                return _invalidDate;
+            }
+        }
+
+        /// <inheritdoc />
+        public async Task<bool> TryAuthenticate(string apiBaseUri)
+        {
+            if (EnsureValid()) return true;
+
+            var client = PoorMansHttpClientFactory.Instance.Client;
+
+            var uri = $"{apiBaseUri}{Constants.Version2Prefix}{Constants.IdentityV2.Token}";
+            var body = new TokenV2
+            {
+                api_key = _apiKey,
+                email = _email
+            };
+            var bodyString = JsonConvert.SerializeObject(body);
+
+            try
+            {
+                var response = await client.PostAsync(new Uri(uri), new StringContent(bodyString, Encoding.UTF8, Constants.JsonMimeType)).ConfigureAwait(false);
+                response.EnsureSuccessStatusCode();
+                var tokenResponse = await response.Content.ReadAsStringAsync();
+                var tokenResult = JsonConvert.DeserializeObject<TokenResult>(tokenResponse);
+                _apiToken = tokenResult!.access_token;
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        private bool EnsureValid() => DateTime.Now < ValidUntil();
+
+        /// <inheritdoc />
+        public void ModifyHeadersCallback(HttpClient httpClient)
+        {
+            if (!EnsureValid()) throw new AuthenticationException("You have to be authenticated to call APIs with authentication.");
+            // nothing to do here
+        }
+
+        /// <inheritdoc />
+        public string ModifyQueryCallback(string currentQuery)
+        {
+            if (!EnsureValid()) throw new AuthenticationException("You have to be authenticated to call APIs with authentication.");
+
+            var nvc = HttpUtility.ParseQueryString((new Uri(currentQuery)).Query);
+            var paramChar = nvc.Count == 0 ? "?" : "&";
+            return $"{currentQuery}{paramChar}token={HttpUtility.UrlEncode(_apiToken)}";
+        }
+
+
+    }
+}

sources/Contenda/Contenda.Sdk/Auth/IAuthProvider.cs

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+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace Contenda.Sdk.Auth
+{
+    /// <summary>
+    /// Authentication provider interface
+    /// </summary>
+    public interface IAuthProvider
+    {
+        /// <summary>
+        /// Modify headers callback
+        /// </summary>
+        /// <param name="httpClient">the HttpClient with the headers to modify</param>
+        void ModifyHeadersCallback(HttpClient httpClient);
+
+        /// <summary>
+        /// Modify query callback
+        /// </summary>
+        /// <param name="currentQuery">the query to modify</param>
+        /// <returns>modified query</returns>
+        string ModifyQueryCallback(string currentQuery);
+
+        /// <summary>
+        /// Try authenticate
+        /// </summary>
+        /// <param name="apiBaseUri">API Base URI</param>
+        /// <returns>true if successfully authenticated, false otherwise</returns>
+        Task<bool> TryAuthenticate(string apiBaseUri);
+    }
+}