added user caching

src/BirdsiteLive.Twitter/BirdsiteLive.Twitter.csproj

@@ -5,6 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="5.0.0" />
     <PackageReference Include="TweetinviAPI" Version="4.0.3" />
   </ItemGroup>
 

src/BirdsiteLive.Twitter/CachedTwitterService.cs

@@ -0,0 +1,52 @@
+using System;
+using BirdsiteLive.Twitter.Models;
+using Microsoft.Extensions.Caching.Memory;
+
+namespace BirdsiteLive.Twitter
+{
+    public class CachedTwitterService : ITwitterService
+    {
+        private readonly ITwitterService _twitterService;
+
+        private MemoryCache _userCache = new MemoryCache(new MemoryCacheOptions()
+        {
+            SizeLimit = 5000
+        });
+        private MemoryCacheEntryOptions _cacheEntryOptions = new MemoryCacheEntryOptions()
+            .SetSize(1)//Size amount
+            //Priority on removing when reaching size limit (memory pressure)
+            .SetPriority(CacheItemPriority.High)
+            // Keep in cache for this time, reset time if accessed.
+            .SetSlidingExpiration(TimeSpan.FromHours(24))
+            // Remove from cache after this time, regardless of sliding expiration
+            .SetAbsoluteExpiration(TimeSpan.FromDays(30));
+
+        #region Ctor
+        public CachedTwitterService(ITwitterService twitterService)
+        {
+            _twitterService = twitterService;
+        }
+        #endregion
+
+        public TwitterUser GetUser(string username)
+        {
+            if (!_userCache.TryGetValue(username, out TwitterUser user))
+            {
+                user = _twitterService.GetUser(username);
+                _userCache.Set(username, user, _cacheEntryOptions);
+            }
+
+            return user;
+        }
+
+        public ExtractedTweet GetTweet(long statusId)
+        {
+            return _twitterService.GetTweet(statusId);
+        }
+
+        public ExtractedTweet[] GetTimeline(string username, int nberTweets, long fromTweetId = -1)
+        {
+            return _twitterService.GetTimeline(username, nberTweets, fromTweetId);
+        }
+    }
+}

src/BirdsiteLive/Startup.cs

@@ -9,6 +9,7 @@ using BirdsiteLive.DAL.Contracts;
 using BirdsiteLive.DAL.Postgres.DataAccessLayers;
 using BirdsiteLive.DAL.Postgres.Settings;
 using BirdsiteLive.Models;
+using BirdsiteLive.Twitter;
 using Lamar;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
@@ -64,7 +65,7 @@ namespace BirdsiteLive
 
             var logsSettings = Configuration.GetSection("Logging").Get<LogsSettings>();
             services.For<LogsSettings>().Use(x => logsSettings);
-
+            
             if (string.Equals(dbSettings.Type, DbTypes.Postgres, StringComparison.OrdinalIgnoreCase))
             {
                 var connString = $"Host={dbSettings.Host};Username={dbSettings.User};Password={dbSettings.Password};Database={dbSettings.Name}";
@@ -73,7 +74,7 @@ namespace BirdsiteLive
                     ConnString = connString
                 };
                 services.For<PostgresSettings>().Use(x => postgresSettings);
-
+                
                 services.For<ITwitterUserDal>().Use<TwitterUserPostgresDal>().Singleton();
                 services.For<IFollowersDal>().Use<FollowersPostgresDal>().Singleton();
                 services.For<IDbInitializerDal>().Use<DbInitializerPostgresDal>().Singleton();
@@ -82,6 +83,9 @@ namespace BirdsiteLive
             {
                 throw new NotImplementedException($"{dbSettings.Type} is not supported");
             }
+            
+            services.For<ITwitterService>().DecorateAllWith<CachedTwitterService>();
+            services.For<ITwitterService>().Use<TwitterService>().Singleton();
 
             services.Scan(_ =>
             {