#33 Preparation:

Abstracted class Komga into LibraryManager
Fixed logger not attaching to LibraryManager

Tranga/LibraryManagers/Komga.cs

@@ -0,0 +1,75 @@
+using System.Text.Json.Nodes;
+using Logging;
+using Newtonsoft.Json;
+using JsonSerializer = System.Text.Json.JsonSerializer;
+
+namespace Tranga.LibraryManagers;
+
+/// <summary>
+/// Provides connectivity to Komga-API
+/// Can fetch and update libraries
+/// </summary>
+public class Komga : LibraryManager
+{
+    public Komga(string baseUrl, string username, string password, Logger? logger)
+        : base(baseUrl, Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes($"{username}:{password}")), logger)
+    {
+    }
+
+    [JsonConstructor]
+    public Komga(string baseUrl, string auth, Logger? logger) : base(baseUrl, auth, logger)
+    {
+    }
+
+    public override void UpdateLibrary()
+    {
+        logger?.WriteLine(this.GetType().ToString(), $"Updating Libraries");
+        foreach (KomgaLibrary lib in GetLibraries())
+            NetClient.MakePost($"{baseUrl}/api/v1/libraries/{lib.id}/scan", auth, logger);
+    }
+
+    /// <summary>
+    /// Fetches all libraries available to the user
+    /// </summary>
+    /// <returns>Array of KomgaLibraries</returns>
+    private IEnumerable<KomgaLibrary> GetLibraries()
+    {
+        logger?.WriteLine(this.GetType().ToString(), $"Getting Libraries");
+        Stream data = NetClient.MakeRequest($"{baseUrl}/api/v1/libraries", auth, logger);
+        if (data == Stream.Null)
+        {
+            logger?.WriteLine(this.GetType().ToString(), $"No libraries returned");
+            return Array.Empty<KomgaLibrary>();
+        }
+        JsonArray? result = JsonSerializer.Deserialize<JsonArray>(data);
+        if (result is null)
+        {
+            logger?.WriteLine(this.GetType().ToString(), $"No libraries returned");
+            return Array.Empty<KomgaLibrary>();
+        }
+
+        HashSet<KomgaLibrary> ret = new();
+
+        foreach (JsonNode? jsonNode in result)
+        {
+            var jObject = (JsonObject?)jsonNode;
+            string libraryId = jObject!["id"]!.GetValue<string>();
+            string libraryName = jObject!["name"]!.GetValue<string>();
+            ret.Add(new KomgaLibrary(libraryId, libraryName));
+        }
+
+        return ret;
+    }
+
+    private struct KomgaLibrary
+    {
+        public string id { get; }
+        public string name { get; }
+
+        public KomgaLibrary(string id, string name)
+        {
+            this.id = id;
+            this.name = name;
+        }
+    }
+}