MangaDex nullvalue checks and allow null-fields in response

API/MangaDownloadClients/HttpDownloadClient.cs

@@ -18,33 +18,28 @@ internal class HttpDownloadClient : DownloadClient
     internal override RequestResult MakeRequestInternal(string url, string? referrer = null, string? clickButton = null)
     {
         if (clickButton is not null)
-            Log.Warn("Can not click button on static site.");
+            Log.Warn("Client can not click button");
         HttpResponseMessage? response = null;
         while (response is null)
         {
             HttpRequestMessage requestMessage = new(HttpMethod.Get, url);
             if (referrer is not null)
-                requestMessage.Headers.Referrer = new Uri(referrer);
+                requestMessage.Headers.Referrer = new (referrer);
             Log.Debug($"Requesting {url}");
             try
             {
                 response = Client.Send(requestMessage);
             }
-            catch (Exception e)
+            catch (HttpRequestException e)
             {
-                switch (e)
-                {
-                    case TaskCanceledException:
-                        return new RequestResult(HttpStatusCode.RequestTimeout, null, Stream.Null);
-                    case HttpRequestException:
-                        return new RequestResult(HttpStatusCode.BadRequest, null, Stream.Null);
-                }
+                Log.Error(e);
+                return new (HttpStatusCode.Unused, null, Stream.Null);
             }
         }
 
         if (!response.IsSuccessStatusCode)
         {
-            return new RequestResult(response.StatusCode,  null, Stream.Null);
+            return new (response.StatusCode,  null, Stream.Null);
         }
 
         Stream stream;
@@ -55,7 +50,7 @@ internal class HttpDownloadClient : DownloadClient
         catch (Exception e)
         {
             Log.Error(e);
-            return new RequestResult(HttpStatusCode.InternalServerError, null, Stream.Null);
+            return new (HttpStatusCode.Unused, null, Stream.Null);
         }
 
         HtmlDocument? document = null;
@@ -71,10 +66,9 @@ internal class HttpDownloadClient : DownloadClient
         // Request has been redirected to another page. For example, it redirects directly to the results when there is only 1 result
         if (response.RequestMessage is not null && response.RequestMessage.RequestUri is not null)
         {
-            return new RequestResult(response.StatusCode, document, stream, true,
-                response.RequestMessage.RequestUri.AbsoluteUri);
+            return new (response.StatusCode, document, stream, true, response.RequestMessage.RequestUri.AbsoluteUri);
         }
 
-        return new RequestResult(response.StatusCode, document, stream);
+        return new (response.StatusCode, document, stream);
     }
 }

API/Schema/MangaConnectors/MangaDex.cs

@@ -226,22 +226,25 @@ public class MangaDex : MangaConnector
     private Manga ParseMangaFromJToken(JToken jToken)
     {
         string? id = jToken.Value<string>("id");
+        if(id is null)
+            throw new Exception("jToken was not in expected format");
         
         JObject? attributes = jToken["attributes"] as JObject;
-        string? name = attributes?["title"]?.Value<string>("en") ?? attributes?["title"]?.First?.First?.Value<string>();
-        string? description = attributes?["description"]?.Value<string>("en")??attributes?["description"]?.First?.First?.Value<string>();
-        string? status = attributes?["status"]?.Value<string>();
-        uint? year = attributes?["year"]?.Value<uint?>();
-        string? originalLanguage = attributes?["originalLanguage"]?.Value<string>();
-        JArray? altTitlesJArray = attributes?["altTitles"] as JArray;
-        JArray? tagsJArray = attributes?["tags"] as JArray;
-        
+        if(attributes is null)
+            throw new Exception("jToken was not in expected format");
+        string? name = attributes["title"]?.Value<string>("en") ?? attributes["title"]?.First?.First?.Value<string>();
+        string description = attributes["description"]?.Value<string>("en")??attributes["description"]?.First?.First?.Value<string>()??"";
+        string? status = attributes["status"]?.Value<string>();
+        uint? year = attributes["year"]?.Value<uint?>();
+        string? originalLanguage = attributes["originalLanguage"]?.Value<string>();
+        JArray? altTitlesJArray = attributes.TryGetValue("altTitles", out JToken? altTitlesArray) ? altTitlesArray as JArray : null;
+        JArray? tagsJArray = attributes.TryGetValue("tags", out JToken? tagsArray) ? tagsArray as JArray : null;
         JArray? relationships = jToken["relationships"] as JArray;
-        string? coverFileName =
-            relationships?.FirstOrDefault(r => r["type"]?.Value<string>() == "cover_art")?["attributes"]?.Value<string>("fileName");
+        if (name is null || status is null || relationships is null)
+            throw new Exception("jToken was not in expected format");
         
-        if (id is null || attributes is null || name is null || description is null || status is null ||
-            altTitlesJArray is null || tagsJArray is null || relationships is null || coverFileName is null)
+        string? coverFileName = relationships.FirstOrDefault(r => r["type"]?.Value<string>() == "cover_art")?["attributes"]?.Value<string>("fileName");
+        if(coverFileName is null)
             throw new Exception("jToken was not in expected format");
         
         List<Link> links = attributes["links"]?
@@ -276,7 +279,7 @@ public class MangaDex : MangaConnector
                 return new Link(key, url);
             }).ToList()!;
 
-        List<MangaAltTitle> altTitles = altTitlesJArray
+        List<MangaAltTitle> altTitles = (altTitlesJArray??[])
             .Select(t =>
             {
                 JObject? j = t as JObject;
@@ -286,7 +289,7 @@ public class MangaDex : MangaConnector
                 return new MangaAltTitle(p.Name, p.Value.ToString());
             }).Where(x => x is not null).ToList()!;
         
-        List<MangaTag> tags = tagsJArray
+        List<MangaTag> tags = (tagsJArray??[])
             .Where(t => t.Value<string>("type") == "tag")
             .Select(t => t["attributes"]?["name"]?.Value<string>("en")??t["attributes"]?["name"]?.First?.First?.Value<string>())
             .Select(str => str is not null ? new MangaTag(str) : null)

API/Tranga.cs

@@ -34,7 +34,9 @@ public static class Tranga
 
     internal static void RemoveStaleFiles(PgsqlContext context)
     {
-        Log.Info($"Removing stale files...");
+        Log.Info("Removing stale files...");
+        if (!Directory.Exists(TrangaSettings.coverImageCache))
+            return;
         string[] usedFiles = context.Mangas.Select(m => m.CoverFileNameInCache).Where(s => s != null).ToArray()!;
         string[] extraneousFiles = new DirectoryInfo(TrangaSettings.coverImageCache).GetFiles()
             .Where(f => usedFiles.Contains(f.FullName) == false)

API/TrangaSettings.cs

@@ -11,7 +11,7 @@ public static class TrangaSettings
     public static string downloadLocation { get; private set; } = (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ? "/Manga" : Path.Join(Directory.GetCurrentDirectory(), "Downloads"));
     public static string workingDirectory { get; private set; } = Path.Join(RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ? "/usr/share" : Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "tranga-api");
     [JsonIgnore]
-    internal static readonly string DefaultUserAgent = $"Tranga ({Enum.GetName(Environment.OSVersion.Platform)}; {(Environment.Is64BitOperatingSystem ? "x64" : "")}) / 1.0";
+    internal static readonly string DefaultUserAgent = $"Tranga ({Enum.GetName(Environment.OSVersion.Platform)}; {(Environment.Is64BitOperatingSystem ? "x64" : "")}) / 2.0";
     public static string userAgent { get; private set; } = DefaultUserAgent;
     public static int compression{ get; private set; } = 40;
     public static bool bwImages { get; private set; } = false;