Misc Polish (#1569)

* Introduced a lock for DB work during the scan to hopefully reduce the concurrency issues

* Don't allow multiple theme scans to occur

* Fixed bulk actions not having all actions due to nested actionable menu changes

* Refactored the Scan loop to be synchronous to avoid any issues. After first loop, no real performance issues.

* Updated the LibraryWatcher when under many internal buffer full issues, to suspend watching for a full hour, to allow whatever downloading to complete.

* Removed Semaphore as it's not needed anymore

* Updated the output for logger to explicitly say from Kavita (if you're pushing to Seq)

* Fixed a broken test

* Fixed ReleaseYear not populating due to a change from a contributor around how to populate ReleaseYear.

* Ensure when scan folder runs, that we don't double enqueue the same tasks.

* Fixed user settings not loading the correct tab

* Changed the Release Year -> Release

* Added more refresh hooks in reader to hopefully ensure faster refreshes

* Reset images between chapter loads to help flush image faster. Don't show broken image icon when an image is still loading.

* Fixed the prefetcher not properly loading the correct images and hence, allowing a bit of lag between chapter loads.

* Code smells

API.Tests/Services/BookmarkServiceTests.cs

@@ -410,7 +410,7 @@ public class BookmarkServiceTests
     #region Misc
 
     [Fact]
-    public async Task ShouldNotDeleteBookmarkOnChapterDeletion()
+    public async Task ShouldNotDeleteBookmark_OnChapterDeletion()
     {
         var filesystem = CreateFileSystem();
         filesystem.AddFile($"{CacheDirectory}1/0001.jpg", new MockFileData("123"));
@@ -462,8 +462,6 @@ public class BookmarkServiceTests
 
 
         var ds = new DirectoryService(Substitute.For<ILogger<DirectoryService>>(), filesystem);
-        var bookmarkService = Create(ds);
-        var user = await _unitOfWork.UserRepository.GetUserByIdAsync(1, AppUserIncludes.Bookmarks);
 
         var vol = await _unitOfWork.VolumeRepository.GetVolumeAsync(1);
         vol.Chapters = new List<Chapter>();
@@ -475,5 +473,72 @@ public class BookmarkServiceTests
         Assert.NotNull(await _unitOfWork.UserRepository.GetBookmarkAsync(1));
     }
 
+
+    [Fact]
+    public async Task ShouldNotDeleteBookmark_OnVolumeDeletion()
+    {
+        var filesystem = CreateFileSystem();
+        filesystem.AddFile($"{CacheDirectory}1/0001.jpg", new MockFileData("123"));
+        filesystem.AddFile($"{BookmarkDirectory}1/1/0001.jpg", new MockFileData("123"));
+
+        // Delete all Series to reset state
+        await ResetDB();
+        var series = new Series()
+        {
+            Name = "Test",
+            Library = new Library()
+            {
+                Name = "Test LIb",
+                Type = LibraryType.Manga,
+            },
+            Volumes = new List<Volume>()
+            {
+                new Volume()
+                {
+                    Chapters = new List<Chapter>()
+                    {
+                        new Chapter()
+                        {
+
+                        }
+                    }
+                }
+            }
+        };
+
+        _context.Series.Add(series);
+
+
+        _context.AppUser.Add(new AppUser()
+        {
+            UserName = "Joe",
+            Bookmarks = new List<AppUserBookmark>()
+            {
+                new AppUserBookmark()
+                {
+                    Page = 1,
+                    ChapterId = 1,
+                    FileName = $"1/1/0001.jpg",
+                    SeriesId = 1,
+                    VolumeId = 1
+                }
+            }
+        });
+
+        await _context.SaveChangesAsync();
+
+        var user = await _unitOfWork.UserRepository.GetUserByIdAsync(1, AppUserIncludes.Bookmarks);
+        Assert.NotEmpty(user.Bookmarks);
+
+        series.Volumes = new List<Volume>();
+        _unitOfWork.SeriesRepository.Update(series);
+        await _unitOfWork.CommitAsync();
+
+
+        var ds = new DirectoryService(Substitute.For<ILogger<DirectoryService>>(), filesystem);
+        Assert.Single(ds.GetFiles(BookmarkDirectory, searchOption:SearchOption.AllDirectories));
+        Assert.NotNull(await _unitOfWork.UserRepository.GetBookmarkAsync(1));
+    }
+
     #endregion
 }

API.Tests/Services/ParseScannedFilesTests.cs

@@ -53,7 +53,7 @@ internal class MockReadingItemService : IReadingItemService
 
     public void Extract(string fileFilePath, string targetDirectory, MangaFormat format, int imageCount = 1)
     {
-        throw new System.NotImplementedException();
+        throw new NotImplementedException();
     }
 
     public ParserInfo Parse(string path, string rootPath, LibraryType type)
@@ -245,11 +245,11 @@ public class ParseScannedFilesTests
 
         var parsedSeries = new Dictionary<ParsedSeries, IList<ParserInfo>>();
 
-        void TrackFiles(Tuple<bool, IList<ParserInfo>> parsedInfo)
+        Task TrackFiles(Tuple<bool, IList<ParserInfo>> parsedInfo)
         {
             var skippedScan = parsedInfo.Item1;
             var parsedFiles = parsedInfo.Item2;
-            if (parsedFiles.Count == 0) return;
+            if (parsedFiles.Count == 0) return Task.CompletedTask;
 
             var foundParsedSeries = new ParsedSeries()
             {
@@ -259,6 +259,7 @@ public class ParseScannedFilesTests
             };
 
             parsedSeries.Add(foundParsedSeries, parsedFiles);
+            return Task.CompletedTask;
         }
 
 

API/Controllers/LibraryController.cs

@@ -213,9 +213,11 @@ public class LibraryController : BaseApiController
     {
         var userId = await _unitOfWork.UserRepository.GetUserIdByApiKeyAsync(dto.ApiKey);
         var user = await _unitOfWork.UserRepository.GetUserByIdAsync(userId);
+
         // Validate user has Admin privileges
         var isAdmin = await _unitOfWork.UserRepository.IsUserAdminAsync(user);
         if (!isAdmin) return BadRequest("API key must belong to an admin");
+
         if (dto.FolderPath.Contains("..")) return BadRequest("Invalid Path");
 
         dto.FolderPath = Services.Tasks.Scanner.Parser.Parser.NormalizePath(dto.FolderPath);

API/Entities/AppUserBookmark.cs

@@ -11,8 +11,8 @@ public class AppUserBookmark : IEntityDate
 {
     public int Id { get; set; }
     public int Page { get; set; }
-    public int VolumeId { get; set; }
     public int SeriesId { get; set; }
+    public int VolumeId { get; set; }
     public int ChapterId { get; set; }
 
     /// <summary>

API/Logging/LogLevelOptions.cs

@@ -40,7 +40,7 @@ public static class LogLevelOptions
 
     public static LoggerConfiguration CreateConfig(LoggerConfiguration configuration)
     {
-        const string outputTemplate = "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} {CorrelationId} {ThreadId}] [{Level}] {SourceContext} {Message:lj}{NewLine}{Exception}";
+        const string outputTemplate = "[Kavita] [{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} {CorrelationId} {ThreadId}] [{Level}] {SourceContext} {Message:lj}{NewLine}{Exception}";
         return configuration
             .MinimumLevel
             .ControlledBy(LogLevelSwitch)

API/Services/TaskScheduler.cs

@@ -158,7 +158,13 @@ public class TaskScheduler : ITaskScheduler
 
     public void ScanSiteThemes()
     {
-        _logger.LogInformation("Starting Site Theme scan");
+        if (HasAlreadyEnqueuedTask("ThemeService", "Scan", Array.Empty<object>(), ScanQueue))
+        {
+            _logger.LogInformation("A Theme Scan is already running");
+            return;
+        }
+
+        _logger.LogInformation("Enqueueing Site Theme scan");
         BackgroundJob.Enqueue(() => _themeService.Scan());
     }
 

API/Services/Tasks/Scanner/LibraryWatcher.cs

@@ -51,6 +51,14 @@ public class LibraryWatcher : ILibraryWatcher
     /// <remarks>The Job will be enqueued instantly</remarks>
     private readonly TimeSpan _queueWaitTime;
 
+    /// <summary>
+    /// Counts within a time frame how many times the buffer became full. Is used to reschedule LibraryWatcher to start monitoring much later rather than instantly
+    /// </summary>
+    private int _bufferFullCounter = 0;
+
+    private DateTime _lastBufferOverflow = DateTime.MinValue;
+
+
 
     public LibraryWatcher(IDirectoryService directoryService, IUnitOfWork unitOfWork, ILogger<LibraryWatcher> logger, IScannerService scannerService, IHostEnvironment environment)
     {
@@ -118,6 +126,9 @@ public class LibraryWatcher : ILibraryWatcher
     public async Task RestartWatching()
     {
         _logger.LogDebug("[LibraryWatcher] Restarting watcher");
+
+        UpdateBufferOverflow();
+
         StopWatching();
         await StartWatching();
     }
@@ -151,6 +162,15 @@ public class LibraryWatcher : ILibraryWatcher
     private void OnError(object sender, ErrorEventArgs e)
     {
         _logger.LogError(e.GetException(), "[LibraryWatcher] An error occured, likely too many changes occured at once or the folder being watched was deleted. Restarting Watchers");
+        _bufferFullCounter += 1;
+        _lastBufferOverflow = DateTime.Now;
+
+        if (_bufferFullCounter >= 3)
+        {
+            _logger.LogInformation("[LibraryWatcher] Internal buffer has been overflown multiple times in past 10 minutes. Suspending file watching for an hour");
+            BackgroundJob.Schedule(() => RestartWatching(), TimeSpan.FromHours(1));
+            return;
+        }
         Task.Run(RestartWatching);
     }
 
@@ -162,8 +182,11 @@ public class LibraryWatcher : ILibraryWatcher
     /// <remarks>This is public only because Hangfire will invoke it. Do not call external to this class.</remarks>
     /// <param name="filePath">File or folder that changed</param>
     /// <param name="isDirectoryChange">If the change is on a directory and not a file</param>
+    // ReSharper disable once MemberCanBePrivate.Global
     public async Task ProcessChange(string filePath, bool isDirectoryChange = false)
     {
+        UpdateBufferOverflow();
+
         var sw = Stopwatch.StartNew();
         _logger.LogDebug("[LibraryWatcher] Processing change of {FilePath}", filePath);
         try
@@ -232,4 +255,15 @@ public class LibraryWatcher : ILibraryWatcher
         // Select the first folder and join with library folder, this should give us the folder to scan.
         return  Parser.Parser.NormalizePath(_directoryService.FileSystem.Path.Join(libraryFolder, rootFolder.First()));
     }
+
+    private void UpdateBufferOverflow()
+    {
+        if (_bufferFullCounter == 0) return;
+        // If the last buffer overflow is over 5 mins back, we can remove a buffer count
+        if (_lastBufferOverflow < DateTime.Now.Subtract(TimeSpan.FromMinutes(5)))
+        {
+            _bufferFullCounter = Math.Min(0, _bufferFullCounter - 1);
+            _lastBufferOverflow = DateTime.Now;
+        }
+    }
 }

API/Services/Tasks/Scanner/ParseScannedFiles.cs

@@ -223,7 +223,7 @@ public class ParseScannedFiles
     /// <returns></returns>
     public async Task ScanLibrariesForSeries(LibraryType libraryType,
         IEnumerable<string> folders, string libraryName, bool isLibraryScan,
-        IDictionary<string, IList<SeriesModified>> seriesPaths, Action<Tuple<bool, IList<ParserInfo>>> processSeriesInfos, bool forceCheck = false)
+        IDictionary<string, IList<SeriesModified>> seriesPaths, Func<Tuple<bool, IList<ParserInfo>>, Task> processSeriesInfos, bool forceCheck = false)
     {
 
         await _eventHub.SendMessageAsync(MessageFactory.NotificationProgress, MessageFactory.FileScanProgressEvent("File Scan Starting", libraryName, ProgressEventType.Started));
@@ -242,7 +242,7 @@ public class ParseScannedFiles
                             Series = fp.SeriesName,
                             Format = fp.Format,
                         }).ToList();
-                        processSeriesInfos.Invoke(new Tuple<bool, IList<ParserInfo>>(true, parsedInfos));
+                        await processSeriesInfos.Invoke(new Tuple<bool, IList<ParserInfo>>(true, parsedInfos));
                         _logger.LogDebug("Skipped File Scan for {Folder} as it hasn't changed since last scan", folder);
                         return;
                     }
@@ -280,7 +280,7 @@ public class ParseScannedFiles
                     {
                         if (scannedSeries[series].Count > 0 && processSeriesInfos != null)
                         {
-                            processSeriesInfos.Invoke(new Tuple<bool, IList<ParserInfo>>(false, scannedSeries[series]));
+                            await processSeriesInfos.Invoke(new Tuple<bool, IList<ParserInfo>>(false, scannedSeries[series]));
                         }
                     }
                 }, forceCheck);

API/Services/Tasks/Scanner/ProcessSeries.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 using API.Data;
 using API.Data.Metadata;
@@ -48,8 +49,6 @@ public class ProcessSeries : IProcessSeries
     private volatile IList<Person> _people;
     private volatile IList<Tag> _tags;
 
-
-
     public ProcessSeries(IUnitOfWork unitOfWork, ILogger<ProcessSeries> logger, IEventHub eventHub,
         IDirectoryService directoryService, ICacheHelper cacheHelper, IReadingItemService readingItemService,
         IFileService fileService, IMetadataService metadataService, IWordCountAnalyzerService wordCountAnalyzerService)
@@ -167,7 +166,9 @@ public class ProcessSeries : IProcessSeries
                 catch (Exception ex)
                 {
                     await _unitOfWork.RollbackAsync();
-                    _logger.LogCritical(ex, "[ScannerService] There was an issue writing to the database for series {@SeriesName}", series.Name);
+                    _logger.LogCritical(ex,
+                        "[ScannerService] There was an issue writing to the database for series {@SeriesName}",
+                        series.Name);
 
                     await _eventHub.SendMessageAsync(MessageFactory.Error,
                         MessageFactory.ErrorEvent($"There was an issue writing to the DB for Series {series}",
@@ -234,7 +235,7 @@ public class ProcessSeries : IProcessSeries
         var chapters = series.Volumes.SelectMany(volume => volume.Chapters).ToList();
 
         // Update Metadata based on Chapter metadata
-        series.Metadata.ReleaseYear = chapters.Min(c => c.ReleaseDate.Year);
+        series.Metadata.ReleaseYear = chapters.Select(v => v.ReleaseDate.Year).Where(y => y >= 1000).Min();
 
         if (series.Metadata.ReleaseYear < 1000)
         {
@@ -439,6 +440,7 @@ public class ProcessSeries : IProcessSeries
         _logger.LogDebug("[ScannerService] Updating {DistinctVolumes} volumes on {SeriesName}", distinctVolumes.Count, series.Name);
         foreach (var volumeNumber in distinctVolumes)
         {
+            _logger.LogDebug("[ScannerService] Looking up volume for {volumeNumber}", volumeNumber);
             var volume = series.Volumes.SingleOrDefault(s => s.Name == volumeNumber);
             if (volume == null)
             {

API/Services/Tasks/ScannerService.cs

@@ -102,6 +102,12 @@ public class ScannerService : IScannerService
         var seriesId = await _unitOfWork.SeriesRepository.GetSeriesIdByFolder(folder);
         if (seriesId > 0)
         {
+            if (TaskScheduler.HasAlreadyEnqueuedTask(Name, "ScanSeries",
+                    new object[] {seriesId, true}))
+            {
+                _logger.LogInformation("[ScannerService] Scan folder invoked for {Folder} but a task is already queued for this series. Dropping request", folder);
+                return;
+            }
             BackgroundJob.Enqueue(() => ScanSeries(seriesId, true));
             return;
         }
@@ -119,6 +125,12 @@ public class ScannerService : IScannerService
         var library = libraries.FirstOrDefault(l => l.Folders.Select(Scanner.Parser.Parser.NormalizePath).Contains(libraryFolder));
         if (library != null)
         {
+            if (TaskScheduler.HasAlreadyEnqueuedTask(Name, "ScanLibrary",
+                    new object[] {library.Id, false}))
+            {
+                _logger.LogInformation("[ScannerService] Scan folder invoked for {Folder} but a task is already queued for this library. Dropping request", folder);
+                return;
+            }
             BackgroundJob.Enqueue(() => ScanLibrary(library.Id, false));
         }
     }
@@ -175,13 +187,11 @@ public class ScannerService : IScannerService
         }
 
         var parsedSeries = new Dictionary<ParsedSeries, IList<ParserInfo>>();
-        var processTasks = new List<Task>();
-
 
         await _eventHub.SendMessageAsync(MessageFactory.NotificationProgress, MessageFactory.LibraryScanProgressEvent(library.Name, ProgressEventType.Started, series.Name));
 
         await _processSeries.Prime();
-        void TrackFiles(Tuple<bool, IList<ParserInfo>> parsedInfo)
+        async Task TrackFiles(Tuple<bool, IList<ParserInfo>> parsedInfo)
         {
             var parsedFiles = parsedInfo.Item2;
             if (parsedFiles.Count == 0) return;
@@ -198,7 +208,7 @@ public class ScannerService : IScannerService
                 return;
             }
 
-            processTasks.Add(_processSeries.ProcessSeriesAsync(parsedFiles, library));
+            await _processSeries.ProcessSeriesAsync(parsedFiles, library);
             parsedSeries.Add(foundParsedSeries, parsedFiles);
         }
 
@@ -424,7 +434,7 @@ public class ScannerService : IScannerService
 
         await _processSeries.Prime();
         var processTasks = new List<Task>();
-        void TrackFiles(Tuple<bool, IList<ParserInfo>> parsedInfo)
+        async Task TrackFiles(Tuple<bool, IList<ParserInfo>> parsedInfo)
         {
             var skippedScan = parsedInfo.Item1;
             var parsedFiles = parsedInfo.Item2;
@@ -452,7 +462,7 @@ public class ScannerService : IScannerService
 
 
             seenSeries.Add(foundParsedSeries);
-            processTasks.Add(_processSeries.ProcessSeriesAsync(parsedFiles, library));
+            await _processSeries.ProcessSeriesAsync(parsedFiles, library);
         }
 
 
@@ -512,7 +522,7 @@ public class ScannerService : IScannerService
     }
 
     private async Task<long> ScanFiles(Library library, IEnumerable<string> dirs,
-        bool isLibraryScan, Action<Tuple<bool, IList<ParserInfo>>> processSeriesInfos = null, bool forceChecks = false)
+        bool isLibraryScan, Func<Tuple<bool, IList<ParserInfo>>, Task> processSeriesInfos = null, bool forceChecks = false)
     {
         var scanner = new ParseScannedFiles(_logger, _directoryService, _readingItemService, _eventHub);
         var scanWatch = Stopwatch.StartNew();

UI/Web/src/app/_services/action-factory.service.ts

@@ -543,12 +543,28 @@ export class ActionFactoryService {
     });
   }
 
-	private applyCallbackToList(list: Array<ActionItem<any>>, callback: (action: ActionItem<any>, data: any) => void): Array<ActionItem<any>> {
+	public applyCallbackToList(list: Array<ActionItem<any>>, callback: (action: ActionItem<any>, data: any) => void): Array<ActionItem<any>> {
 		const actions = list.map((a) => {
 			return { ...a };
 		});
 		actions.forEach((action) => this.applyCallback(action, callback));
 		return actions;
 	}
+
+  // Checks the whole tree for the action and returns true if it exists
+  public hasAction(actions: Array<ActionItem<any>>, action: Action) {
+    var actionFound = false;
+
+    if (actions.length === 0) return actionFound;
+
+    for (let i = 0; i < actions.length; i++) 
+    {
+      if (actions[i].action === action) return true;
+      if (this.hasAction(actions[i].children, action)) return true;
+    }
+
+
+    return actionFound;
+  }
   
 }

UI/Web/src/app/cards/bulk-operations/bulk-operations.component.ts

@@ -1,6 +1,6 @@
 import { ChangeDetectionStrategy, ChangeDetectorRef, Component, Input, OnDestroy, OnInit } from '@angular/core';
 import { Subject, takeUntil } from 'rxjs';
-import { Action, ActionItem } from 'src/app/_services/action-factory.service';
+import { Action, ActionFactoryService, ActionItem } from 'src/app/_services/action-factory.service';
 import { BulkSelectionService } from '../bulk-selection.service';
 
 @Component({
@@ -24,14 +24,15 @@ export class BulkOperationsComponent implements OnInit, OnDestroy {
     return Action;
   }
 
-  constructor(public bulkSelectionService: BulkSelectionService, private readonly cdRef: ChangeDetectorRef) { }
+  constructor(public bulkSelectionService: BulkSelectionService, private readonly cdRef: ChangeDetectorRef,
+    private actionFactoryService: ActionFactoryService) { }
 
   ngOnInit(): void {
     this.bulkSelectionService.actions$.pipe(takeUntil(this.onDestory)).subscribe(actions => {
-      actions.forEach(a => a.callback = this.actionCallback.bind(this));
+      // We need to do a recursive callback apply
-      this.actions = actions;
+      this.actions = this.actionFactoryService.applyCallbackToList(actions, this.actionCallback.bind(this));
-      this.hasMarkAsRead = this.actions.filter(act => act.action === Action.MarkAsRead).length > 0;
+      this.hasMarkAsRead = this.actionFactoryService.hasAction(this.actions, Action.MarkAsRead);
-      this.hasMarkAsUnread = this.actions.filter(act => act.action === Action.MarkAsUnread).length > 0;
+      this.hasMarkAsUnread = this.actionFactoryService.hasAction(this.actions, Action.MarkAsUnread);
       this.cdRef.markForCheck();
     });
   }
@@ -46,9 +47,7 @@ export class BulkOperationsComponent implements OnInit, OnDestroy {
   }
 
   performAction(action: ActionItem<any>) {
-    if (typeof action.callback === 'function') {
+    this.actionCallback(action, null);
-      action.callback(action, null);
-    }
   }
 
   executeAction(action: Action) {

UI/Web/src/app/cards/bulk-selection.service.ts

@@ -142,16 +142,17 @@ export class BulkSelectionService {
   getActions(callback: (action: ActionItem<any>, data: any) => void) {
     // checks if series is present. If so, returns only series actions
     // else returns volume/chapter items
-    const allowedActions = [Action.AddToReadingList, Action.MarkAsRead, Action.MarkAsUnread, Action.AddToCollection, Action.Delete, Action.AddToWantToReadList, Action.RemoveFromWantToReadList];
+    const allowedActions = [Action.AddToReadingList, Action.MarkAsRead, Action.MarkAsUnread, Action.AddToCollection, 
+      Action.Delete, Action.AddToWantToReadList, Action.RemoveFromWantToReadList];
     if (Object.keys(this.selectedCards).filter(item => item === 'series').length > 0) {
-      return this.actionFactory.getSeriesActions(callback).filter(item => allowedActions.includes(item.action));
+      return this.applyFilterToList(this.actionFactory.getSeriesActions(callback), allowedActions);
     }
 
     if (Object.keys(this.selectedCards).filter(item => item === 'bookmark').length > 0) {
       return this.actionFactory.getBookmarkActions(callback);
     }
 
-    return this.actionFactory.getVolumeActions(callback).filter(item => allowedActions.includes(item.action));
+    return this.applyFilterToList(this.actionFactory.getVolumeActions(callback), allowedActions);
   }
 
   private debugLog(message: string, extraData?: any) {
@@ -163,4 +164,29 @@ export class BulkSelectionService {
       console.log(message);
     }
   }
+
+  private applyFilter(action: ActionItem<any>, allowedActions: Array<Action>) {
+    
+    var ret = false;
+    if (action.action === Action.Submenu || allowedActions.includes(action.action)) {
+      // Do something
+      ret = true;
+    }
+
+    if (action.children === null || action.children?.length === 0) return ret;
+
+    action.children = action.children.filter((childAction) => this.applyFilter(childAction, allowedActions));
+
+    // action.children?.forEach((childAction) => {
+    //   this.applyFilter(childAction, allowedActions);
+    // });
+    return ret;
+  }
+
+	private applyFilterToList(list: Array<ActionItem<any>>, allowedActions: Array<Action>): Array<ActionItem<any>> {
+		const actions = list.map((a) => {
+			return { ...a };
+		});
+    return actions.filter(action => this.applyFilter(action, allowedActions));
+	}
 }

UI/Web/src/app/cards/series-info-cards/series-info-cards.component.html

@@ -1,7 +1,7 @@
 <div class="row g-0 mb-4 mt-3">
     <ng-container *ngIf="seriesMetadata.releaseYear > 0">
         <div class="col-lg-1 col-md-4 col-sm-4 col-4 mb-3">
-            <app-icon-and-title label="Release Year" [clickable]="false" fontClasses="fa-regular fa-calendar" title="Release Year">
+            <app-icon-and-title label="Release" [clickable]="false" fontClasses="fa-regular fa-calendar" title="Release Year">
                 {{seriesMetadata.releaseYear}}
             </app-icon-and-title>
         </div>

UI/Web/src/app/manga-reader/manga-reader.component.html

@@ -66,11 +66,11 @@
                     'fit-to-height-double-offset': FittingOption === FITTING_OPTION.HEIGHT && ShouldRenderDoublePage,
                     'original-double-offset' : FittingOption === FITTING_OPTION.ORIGINAL && ShouldRenderDoublePage}"
                     [style.filter]="'brightness(' + generalSettingsForm.get('darkness')?.value + '%)' | safeStyle" (dblclick)="bookmarkPage($event)">
-                <img #image [src]="canvasImage.src" id="image-1"
+                <img alt=" " #image [src]="canvasImage.src" id="image-1"
                     class="{{getFittingOptionClass()}} {{readerMode === ReaderMode.LeftRight || readerMode === ReaderMode.UpDown ? '' : 'd-none'}} {{showClickOverlay ? 'blur' : ''}}">
 
                 <ng-container *ngIf="(this.canvasImage2.src !== '') && (readerService.imageUrlToPageNum(canvasImage2.src) <= maxPages - 1 && !isCoverImage())">
-                    <img [src]="canvasImage2.src" id="image-2" class="image-2 {{getFittingOptionClass()}} {{readerMode === ReaderMode.LeftRight || readerMode === ReaderMode.UpDown ? '' : 'd-none'}} {{showClickOverlay ? 'blur' : ''}}"> <!--  {{ShouldRenderReverseDouble ? 'reverse' : ''}} -->
+                    <img alt=" " [src]="canvasImage2.src" id="image-2" class="image-2 {{getFittingOptionClass()}} {{readerMode === ReaderMode.LeftRight || readerMode === ReaderMode.UpDown ? '' : 'd-none'}} {{showClickOverlay ? 'blur' : ''}}"> <!--  {{ShouldRenderReverseDouble ? 'reverse' : ''}} -->
                 </ng-container>
             </div>
 

UI/Web/src/app/manga-reader/manga-reader.component.ts

@@ -661,6 +661,8 @@ export class MangaReaderComponent implements OnInit, AfterViewInit, OnDestroy {
     this.pageNum = 0;
     this.pagingDirection = PAGING_DIRECTION.FORWARD;
     this.inSetup = true;
+    this.canvasImage.src = '';
+    this.canvasImage2.src = '';
     this.cdRef.markForCheck();
 
     if (this.goToPageEvent) {
@@ -1042,8 +1044,7 @@ export class MangaReaderComponent implements OnInit, AfterViewInit, OnDestroy {
         this.isCoverImage()
         || this.isWideImage(this.canvasImagePrev)
       ) ? 2 : 1;
-    }
+    } else if (this.layoutMode === LayoutMode.DoubleReversed) {
-    if (this.layoutMode === LayoutMode.DoubleReversed) {
       pageAmount = !(
         this.isCoverImage() 
         || this.isCoverImage(this.pageNum - 1) 
@@ -1300,13 +1301,14 @@ export class MangaReaderComponent implements OnInit, AfterViewInit, OnDestroy {
    * and also maintains page info (wide image, etc) due to onload event.
    */
   prefetch() {
-    for(let i = 1; i <= PREFETCH_PAGES - 3; i++) {
+    for(let i = 0; i <= PREFETCH_PAGES - 3; i++) {
       const numOffset = this.pageNum + i;
       if (numOffset > this.maxPages - 1) continue;
 
-      const index = numOffset % this.cachedImages.length;
+      const index = (numOffset % this.cachedImages.length + this.cachedImages.length) % this.cachedImages.length;
       if (this.readerService.imageUrlToPageNum(this.cachedImages[index].src) !== numOffset) {
         this.cachedImages[index].src = this.getPageUrl(numOffset);
+        this.cachedImages[index].onload = () => this.cdRef.markForCheck();
       }
     }
 

UI/Web/src/app/user-settings/user-preferences/user-preferences.component.ts

@@ -61,7 +61,7 @@ export class UserPreferencesComponent implements OnInit, OnDestroy {
     {title: 'Theme', fragment: FragmentID.Theme},
     {title: 'Devices', fragment: FragmentID.Devices},
   ];
-  active = this.tabs[0];
+  active = this.tabs[1];
   opdsEnabled: boolean = false;
   makeUrl: (val: string) => string = (val: string) => {return this.transformKeyToOpdsUrl(val)};
 
@@ -87,7 +87,7 @@ export class UserPreferencesComponent implements OnInit, OnDestroy {
       if (tab.length > 0) {
         this.active = tab[0];
       } else {
-        this.active = this.tabs[0]; // Default to first tab
+        this.active = this.tabs[1]; // Default to preferences
       }
       this.cdRef.markForCheck();
     });