Implemented ability to generate Series summary from ComicInfo.xml (if present)

API/Services/ArchiveService.cs

@@ -3,6 +3,9 @@ using System.Diagnostics;
 using System.IO;
 using System.IO.Compression;
 using System.Linq;
+using System.Xml;
+using System.Xml.Linq;
+using System.Xml.Serialization;
 using API.Extensions;
 using API.Interfaces;
 using API.Interfaces.Services;
@@ -146,7 +149,34 @@ namespace API.Services
 
         public string GetSummaryInfo(string archivePath)
         {
-            throw new NotImplementedException();
+            var summary = "";
+            if (!IsValidArchive(archivePath)) return summary;
+            
+            using var archive = ZipFile.OpenRead(archivePath);
+            if (!archive.HasFiles()) return summary;
+            
+            var info = archive.Entries.SingleOrDefault(x => Path.GetFileNameWithoutExtension(x.Name).ToLower() == "comicinfo" && Parser.Parser.IsXml(x.FullName));
+            if (info == null) return summary;
+            
+            // Parse XML file
+            try
+            {
+                using var stream = info.Open();
+                var serializer = new XmlSerializer(typeof(ComicInfo));
+                ComicInfo comicInfo = 
+                    (ComicInfo)serializer.Deserialize(stream);
+                
+                if (comicInfo != null)
+                {
+                    return comicInfo.Summary;
+                }
+            }
+            catch (AggregateException ex)
+            {
+                _logger.LogError(ex, "There was an issue parsing ComicInfo.xml from {ArchivePath}", archivePath);
+            }
+
+            return summary;
         }
 
         /// <summary>

API/Services/ComicInfo.cs

@@ -0,0 +1,15 @@
+namespace API.Services
+{
+    public class ComicInfo
+    {
+        public string Summary;
+        public string Title;
+        public string Series;
+        public string Notes;
+        public string Publisher;
+        public string Genre;
+        public int PageCount;
+        public string LanguageISO;
+        public string Web;
+    }
+}

API/Services/MetadataService.cs

@@ -65,10 +65,14 @@ namespace API.Services
              }
              series.CoverImage = firstCover?.CoverImage;
           }
+
+          if (!string.IsNullOrEmpty(series.Summary) && !forceUpdate) return;
           
-          if (string.IsNullOrEmpty(series.Summary) || forceUpdate)
+          var firstVolume = series.Volumes.FirstOrDefault(v => v.Chapters.Any() && v.Number == 1);
+          var firstChapter = firstVolume?.Chapters.FirstOrDefault(c => c.Files.Any());
+          if (firstChapter != null)
           {
-             series.Summary = _archiveService.GetSummaryInfo(series.Volumes.First().Chapters.First().Files.First().FilePath);
+             series.Summary = _archiveService.GetSummaryInfo(firstChapter.Files.FirstOrDefault()?.FilePath);
           }
        }