[v2] Add TMDB context (#153 #158)

Author: henrikfroehling

src/libs/Trakt.NET.Extensions.TMDB/Internal/Contexts/TMDBContext.cs

@@ -0,0 +1,33 @@
+namespace TraktNET
+{
+    public sealed class TMDBContext : ITraktContext
+    {
+        private string _readAccessToken = string.Empty;
+
+        public string ID { get; } = Guid.NewGuid().ToString();
+
+        public Uri BaseUri { get; internal set; }
+
+        internal TMDBContext(string readAccessToken)
+        {
+            ReadAccessToken = readAccessToken;
+            BaseUri = new Uri($"{TMDBConstants.API.BaseURL}{TMDBConstants.API.Version}/");
+            HttpClientProvider = new TMDBHttpClientProvider();
+        }
+
+        internal string ReadAccessToken
+        {
+            get => _readAccessToken;
+
+            set
+            {
+                ArgumentValidator.ThrowIfNullOrWhiteSpace(value, "read access token must not be null or empty or only whitespace", checkSpaces: true);
+                _readAccessToken = value;
+            }
+        }
+
+        internal HttpClientProvider<TMDBContext> HttpClientProvider { get; set; }
+
+        internal HttpClient GetHttpClient() => HttpClientProvider.GetHttpClient(this);
+    }
+}

src/libs/Trakt.NET.Extensions.TMDB/Internal/Requests/TMDBHttpClientProvider.cs

@@ -0,0 +1,12 @@
+using System.Collections.Concurrent;
+
+namespace TraktNET
+{
+    internal sealed class TMDBHttpClientProvider : HttpClientProvider<TMDBContext>
+    {
+        private static readonly ConcurrentDictionary<string, HttpClient> s_httpClientCache = new();
+
+        internal override HttpClient GetHttpClient(TMDBContext context)
+            => s_httpClientCache.GetOrAdd(context.ID, CreateHttpClient(context));
+    }
+}

src/libs/Trakt.NET.Extensions.TMDB/Internal/TMDBConstants.cs

@@ -4,6 +4,8 @@ namespace TraktNET
 {
     internal static class TMDBConstants
     {
+        internal const string ContextRegistryKey = "tmdb";
+
         internal static class API
         {
             internal const string BaseURL = "https://api.themoviedb.org/";

src/libs/Trakt.NET.Extensions.TMDB/TraktTMDBExtensions.cs

@@ -4,6 +4,13 @@ namespace TraktNET
 {
     public static class TraktTMDBExtensions
     {
+        public static TraktClient WithTMDB(this TraktClient client, string readAccessToken)
+        {
+            var context = new TMDBContext(readAccessToken);
+            ContextRegistry.Add(TMDBConstants.ContextRegistryKey, context);
+            return client;
+        }
+
         public static async Task<TMDBResponse<TMDBMovieImages>> GetTMDBImagesAsync(this TraktMovieMinimal traktMovie, CancellationToken cancellationToken = default)
         {
             // TODO

src/libs/Trakt.NET/Internal/Contexts/ContextRegistry.cs

@@ -0,0 +1,24 @@
+using System.Collections.Concurrent;
+using System.Diagnostics;
+
+namespace TraktNET
+{
+    internal static class ContextRegistry
+    {
+        private static readonly ConcurrentDictionary<string, ITraktContext> s_contexts = new();
+
+        internal static void Add(ITraktContext context) => _ = s_contexts.TryAdd(context.ID, context);
+
+        internal static void Add(string id, ITraktContext context)
+        {
+            Debug.Assert(!string.IsNullOrWhiteSpace(id));
+            _ = s_contexts.TryAdd(id, context);
+        }
+
+        internal static TContext Get<TContext>(string id) where TContext : class, ITraktContext
+        {
+            Debug.Assert(s_contexts.ContainsKey(id));
+            return (s_contexts[id] as TContext)!;
+        }
+    }
+}

src/libs/Trakt.NET/Internal/Contexts/TraktContext.cs

@@ -77,10 +77,18 @@ public abstract class TraktContext : ITraktContext
         public TraktUsersModule Users { get; }
 
         public static TraktContext Create(string clientID, string clientSecret)
-            => new TraktDefaultContext(clientID, clientSecret);
+        {
+            var context = new TraktDefaultContext(clientID, clientSecret);
+            ContextRegistry.Add(context);
+            return context;
+        }
 
         public static TraktContext CreateForSandbox(string clientID, string clientSecret)
-            => new TraktSandboxContext(clientID, clientSecret);
+        {
+            var context = new TraktSandboxContext(clientID, clientSecret);
+            ContextRegistry.Add(context);
+            return context;
+        }
 
         protected TraktContext(string clientID, string clientSecret)
         {

src/tests/libs/Trakt.NET.Extensions.TMDB.Tests/Contexts/TMDBContextTests.cs

@@ -0,0 +1,37 @@
+namespace TraktNET.Contexts
+{
+    public sealed class TMDBContextTests
+    {
+        private const string ReadAccessToken = "readAccessToken";
+
+        [Fact]
+        public void TestTMDBContextWithReadAccessToken()
+        {
+            var context = new TMDBContext(ReadAccessToken);
+
+            context.ID.ShouldNotBeNullOrEmpty();
+            context.ReadAccessToken.ShouldBe(ReadAccessToken);
+        }
+
+        [Fact]
+        public void TestTMDBContextHasCorrectBaseUri()
+        {
+            var context = new TMDBContext(ReadAccessToken);
+
+            context.BaseUri.AbsoluteUri.ShouldBe("https://api.themoviedb.org/3/");
+        }
+
+        [Fact]
+        public void TestTMDBContextInvalidReadAccessToken()
+        {
+            Action act = () => _ = new TMDBContext(string.Empty);
+            act.ShouldThrow<ArgumentException>();
+
+            act = () => _ = new TMDBContext("    ");
+            act.ShouldThrow<ArgumentException>();
+
+            act = () => _ = new TMDBContext(" id ");
+            act.ShouldThrow<ArgumentException>();
+        }
+    }
+}