#33 Preparation:

Abstracted class Komga into LibraryManager
Fixed logger not attaching to LibraryManager

Tranga/LibraryManager.cs

@@ -0,0 +1,82 @@
+using System.Net;
+using System.Net.Http.Headers;
+using Logging;
+
+namespace Tranga;
+
+public abstract class LibraryManager
+{
+    public string baseUrl { get; }
+    protected string auth { get; } //Base64 encoded, if you use your password everywhere, you have problems
+    protected Logger? logger;
+    
+    /// <param name="baseUrl">Base-URL of Komga instance, no trailing slashes(/)</param>
+    /// <param name="auth">Base64 string of username and password (username):(password)</param>
+    /// <param name="logger"></param>
+    protected LibraryManager(string baseUrl, string auth, Logger? logger)
+    {
+        this.baseUrl = baseUrl;
+        this.auth = auth;
+        this.logger = logger;
+    }
+    public abstract void UpdateLibrary();
+
+    public void AddLogger(Logger newLogger)
+    {
+        this.logger = newLogger;
+    }
+
+    protected static class NetClient
+    {
+        public static Stream MakeRequest(string url, string auth, Logger? logger)
+        {
+            HttpClientHandler clientHandler = new ();
+            HttpClient client = new(clientHandler);
+            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", auth);
+            
+            HttpRequestMessage requestMessage = new ()
+            {
+                Method = HttpMethod.Get,
+                RequestUri = new Uri(url)
+            };
+            logger?.WriteLine("LibraryManager", $"GET {url}");
+            HttpResponseMessage response = client.Send(requestMessage);
+            logger?.WriteLine("LibraryManager", $"{(int)response.StatusCode} {response.StatusCode}: {response.ReasonPhrase}");
+            
+            if(response.StatusCode is HttpStatusCode.Unauthorized && response.RequestMessage!.RequestUri!.AbsoluteUri != url)
+                return MakeRequest(response.RequestMessage!.RequestUri!.AbsoluteUri, auth, logger);
+            else if (response.IsSuccessStatusCode)
+                return response.Content.ReadAsStream();
+            else
+                return Stream.Null;
+        }
+
+        public static bool MakePost(string url, string auth, Logger? logger)
+        {
+            HttpClientHandler clientHandler = new ();
+            HttpClient client = new(clientHandler)
+            {
+                DefaultRequestHeaders =
+                {
+                    { "Accept", "application/json" },
+                    { "Authorization", new AuthenticationHeaderValue("Basic", auth).ToString() }
+                }
+            };
+            HttpRequestMessage requestMessage = new ()
+            {
+                Method = HttpMethod.Post,
+                RequestUri = new Uri(url)
+            };
+            logger?.WriteLine("LibraryManager", $"POST {url}");
+            HttpResponseMessage response = client.Send(requestMessage);
+            logger?.WriteLine("LibraryManager", $"{(int)response.StatusCode} {response.StatusCode}: {response.ReasonPhrase}");
+            
+            if(response.StatusCode is HttpStatusCode.Unauthorized && response.RequestMessage!.RequestUri!.AbsoluteUri != url)
+                return MakePost(response.RequestMessage!.RequestUri!.AbsoluteUri, auth, logger);
+            else if (response.IsSuccessStatusCode)
+                return true;
+            else 
+                return false;
+        }
+    }
+}