add an exception watch

Signed-off-by: Sam Therapy <sam@samtherapy.net>

src/BirdsiteLive.Pipeline/Processors/RetrieveTweetsProcessor.cs

@@ -86,7 +86,7 @@ namespace BirdsiteLive.Pipeline.Processors
 
         private ExtractedTweet[] RetrieveNewTweets(SyncTwitterUser user)
         {
-            var tweets = new ExtractedTweet[0];
+            var tweets = Array.Empty<ExtractedTweet>();
 
             try
             {

src/BirdsiteLive.Twitter/Extractors/TweetExtractor.cs

@@ -29,6 +29,8 @@ namespace BirdsiteLive.Twitter.Extractors
 
         public ExtractedTweet Extract(ITweet tweet)
         {
+            if (tweet == null)
+                throw new ArgumentNullException("no tweet found");
             var extractedTweet = new ExtractedTweet
             {
                 Id = tweet.Id,

src/BirdsiteLive/Startup.cs

@@ -1,15 +1,10 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Net.Http;
-using System.Threading.Tasks;
 
 using BirdsiteLive.Common.Settings;
 using BirdsiteLive.Common.Structs;
 using BirdsiteLive.DAL.Contracts;
 using BirdsiteLive.DAL.Postgres.DataAccessLayers;
 using BirdsiteLive.DAL.Postgres.Settings;
-using BirdsiteLive.Models;
 using BirdsiteLive.Twitter;
 using BirdsiteLive.Twitter.Tools;
 
@@ -17,7 +12,6 @@ using Lamar;
 
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.HttpsPolicy;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;