Scan Loop Fixes (#1572)

* Cleanup some messaging in the scan loop to be more context bearing

* Added Response Caching to Series Detail for 1 min, due to the heavy nature of the call.

* Refactored code to make it so that processing of series runs sync correctly.

Added a log to inform the user of corrupted volume from buggy code in v0.5.6.

* Moved folder watching out of experimental

* Fixed an issue where empty folders could break the scan loop

* Another fix for when dates aren't valid, the scanner wouldn't get the proper min and would throw an exception (develop)

* Implemented the ability to edit release year from the UI for a series.

* Added a unit test for some new logic

* Code smells

API.Tests/Services/SeriesServiceTests.cs

@@ -1001,6 +1001,41 @@ public class SeriesServiceTests
         Assert.True(series.Metadata.GenresLocked);
     }
 
+    [Fact]
+    public async Task UpdateSeriesMetadata_ShouldNotUpdateReleaseYear_IfLessThan1000()
+    {
+        await ResetDb();
+        var s = new Series()
+        {
+            Name = "Test",
+            Library = new Library()
+            {
+                Name = "Test LIb",
+                Type = LibraryType.Book,
+            },
+            Metadata = DbFactory.SeriesMetadata(new List<CollectionTag>())
+        };
+        _context.Series.Add(s);
+        await _context.SaveChangesAsync();
+
+        var success = await _seriesService.UpdateSeriesMetadata(new UpdateSeriesMetadataDto()
+        {
+            SeriesMetadata = new SeriesMetadataDto()
+            {
+                SeriesId = 1,
+                ReleaseYear = 100,
+            },
+            CollectionTags = new List<CollectionTagDto>()
+        });
+
+        Assert.True(success);
+
+        var series = await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(1);
+        Assert.NotNull(series.Metadata);
+        Assert.Equal(0, series.Metadata.ReleaseYear);
+        Assert.False(series.Metadata.ReleaseYearLocked);
+    }
+
     #endregion
 
     #region GetFirstChapterForMetadata

API/Controllers/SeriesController.cs

@@ -377,6 +377,7 @@ public class SeriesController : BaseApiController
     /// <param name="seriesId"></param>
     /// <returns></returns>
     /// <remarks>Do not rely on this API externally. May change without hesitation. </remarks>
+    [ResponseCache(Duration = 60, Location = ResponseCacheLocation.Any, VaryByQueryKeys = new [] {"seriesId"})]
     [HttpGet("series-detail")]
     public async Task<ActionResult<SeriesDetailDto>> GetSeriesDetailBreakdown(int seriesId)
     {

API/DTOs/Account/UpdateUserDto.cs

@@ -8,7 +8,6 @@ public record UpdateUserDto
     public string Username { get; set; }
     /// List of Roles to assign to user. If admin not present, Pleb will be applied.
     /// If admin present, all libraries will be granted access and will ignore those from DTO.
-    /// </summary>
     public IList<string> Roles { get; init; }
     /// <summary>
     /// A list of libraries to grant access to

API/DTOs/SeriesMetadataDto.cs

@@ -79,6 +79,7 @@ public class SeriesMetadataDto
     public bool PublishersLocked { get; set; }
     public bool TranslatorsLocked { get; set; }
     public bool CoverArtistsLocked { get; set; }
+    public bool ReleaseYearLocked { get; set; }
 
 
     public int SeriesId { get; set; }

API/Data/Migrations/20221006013956_ReleaseYearOnSeriesEdit.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace API.Data.Migrations
+{
+    public partial class ReleaseYearOnSeriesEdit : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "ReleaseYearLocked",
+                table: "SeriesMetadata",
+                type: "INTEGER",
+                nullable: false,
+                defaultValue: false);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ReleaseYearLocked",
+                table: "SeriesMetadata");
+        }
+    }
+}

API/Data/Migrations/DataContextModelSnapshot.cs

@@ -647,6 +647,9 @@ namespace API.Data.Migrations
                     b.Property<int>("ReleaseYear")
                         .HasColumnType("INTEGER");
 
+                    b.Property<bool>("ReleaseYearLocked")
+                        .HasColumnType("INTEGER");
+
                     b.Property<uint>("RowVersion")
                         .IsConcurrencyToken()
                         .HasColumnType("INTEGER");

API/Entities/Metadata/SeriesMetadata.cs

@@ -67,6 +67,7 @@ public class SeriesMetadata : IHasConcurrencyToken
     public bool PublisherLocked { get; set; }
     public bool TranslatorLocked { get; set; }
     public bool CoverArtistLocked { get; set; }
+    public bool ReleaseYearLocked { get; set; }
 
 
     // Relationship

API/Services/DirectoryService.cs

@@ -645,12 +645,15 @@ public class DirectoryService : IDirectoryService
     /// <summary>
     /// Recursively scans a folder and returns the max last write time on any folders and files
     /// </summary>
+    /// <remarks>If the folder is empty, this will return MaxValue for a DateTime</remarks>
     /// <param name="folderPath"></param>
     /// <returns>Max Last Write Time</returns>
     public DateTime GetLastWriteTime(string folderPath)
     {
         if (!FileSystem.Directory.Exists(folderPath)) throw new IOException($"{folderPath} does not exist");
-        return Directory.GetFileSystemEntries(folderPath, "*.*", SearchOption.AllDirectories).Max(path => FileSystem.File.GetLastWriteTime(path));
+        var fileEntries = Directory.GetFileSystemEntries(folderPath, "*.*", SearchOption.AllDirectories);
+        if (fileEntries.Length == 0) return DateTime.MaxValue;
+        return fileEntries.Max(path => FileSystem.File.GetLastWriteTime(path));
     }
 
     /// <summary>

API/Services/SeriesService.cs

@@ -76,6 +76,12 @@ public class SeriesService : ISeriesService
                 series.Metadata.AgeRatingLocked = true;
             }
 
+            if (updateSeriesMetadataDto.SeriesMetadata.ReleaseYear > 1000 && series.Metadata.ReleaseYear != updateSeriesMetadataDto.SeriesMetadata.ReleaseYear)
+            {
+                series.Metadata.ReleaseYear = updateSeriesMetadataDto.SeriesMetadata.ReleaseYear;
+                series.Metadata.ReleaseYearLocked = true;
+            }
+
             if (series.Metadata.PublicationStatus != updateSeriesMetadataDto.SeriesMetadata.PublicationStatus)
             {
                 series.Metadata.PublicationStatus = updateSeriesMetadataDto.SeriesMetadata.PublicationStatus;
@@ -167,6 +173,7 @@ public class SeriesService : ISeriesService
             series.Metadata.CoverArtistLocked = updateSeriesMetadataDto.SeriesMetadata.CoverArtistsLocked;
             series.Metadata.WriterLocked = updateSeriesMetadataDto.SeriesMetadata.WritersLocked;
             series.Metadata.SummaryLocked = updateSeriesMetadataDto.SeriesMetadata.SummaryLocked;
+            series.Metadata.ReleaseYearLocked = updateSeriesMetadataDto.SeriesMetadata.ReleaseYearLocked;
 
             if (!_unitOfWork.HasChanges())
             {

API/Services/Tasks/Scanner/ParseScannedFiles.cs

@@ -81,6 +81,7 @@ public class ParseScannedFiles
         if (scanDirectoryByDirectory)
         {
             // This is used in library scan, so we should check first for a ignore file and use that here as well
+            // TODO: We need to calculate all folders till library root and see if any kavitaignores
             var potentialIgnoreFile = _directoryService.FileSystem.Path.Join(folderPath, DirectoryService.KavitaIgnoreFile);
             var matcher = _directoryService.CreateMatcherFromFile(potentialIgnoreFile);
             var directories = _directoryService.GetDirectories(folderPath, matcher).ToList();
@@ -228,11 +229,7 @@ public class ParseScannedFiles
 
         await _eventHub.SendMessageAsync(MessageFactory.NotificationProgress, MessageFactory.FileScanProgressEvent("File Scan Starting", libraryName, ProgressEventType.Started));
 
-        foreach (var folderPath in folders)
-        {
-            try
-            {
-                await ProcessFiles(folderPath, isLibraryScan, seriesPaths, async (files, folder) =>
+        async Task ProcessFolder(IList<string> files, string folder)
         {
             var normalizedFolder = Parser.Parser.NormalizePath(folder);
             if (HasSeriesFolderNotChangedSinceLastScan(seriesPaths, normalizedFolder, forceCheck))
@@ -246,16 +243,19 @@ public class ParseScannedFiles
                 _logger.LogDebug("Skipped File Scan for {Folder} as it hasn't changed since last scan", folder);
                 return;
             }
+
             _logger.LogDebug("Found {Count} files for {Folder}", files.Count, folder);
-                    await _eventHub.SendMessageAsync(MessageFactory.NotificationProgress, MessageFactory.FileScanProgressEvent(folderPath, libraryName, ProgressEventType.Updated));
+            await _eventHub.SendMessageAsync(MessageFactory.NotificationProgress,
+                MessageFactory.FileScanProgressEvent(folder, libraryName, ProgressEventType.Updated));
             if (files.Count == 0)
             {
                 _logger.LogInformation("[ScannerService] {Folder} is empty", folder);
                 return;
             }
+
             var scannedSeries = new ConcurrentDictionary<ParsedSeries, List<ParserInfo>>();
             var infos = files
-                        .Select(file => _readingItemService.ParseFile(file, folderPath, libraryType))
+                .Select(file => _readingItemService.ParseFile(file, folder, libraryType))
                 .Where(info => info != null)
                 .ToList();
 
@@ -270,12 +270,12 @@ public class ParseScannedFiles
                 }
                 catch (Exception ex)
                 {
-                            _logger.LogError(ex, "There was an exception that occurred during tracking {FilePath}. Skipping this file", info.FullFilePath);
+                    _logger.LogError(ex,
+                        "There was an exception that occurred during tracking {FilePath}. Skipping this file",
+                        info.FullFilePath);
                 }
             }
 
-                    // It would be really cool if we can emit an event when a folder hasn't been changed so we don't parse everything, but the first item to ensure we don't delete it
-                    // Otherwise, we can do a last step in the DB where we validate all files on disk exist and if not, delete them. (easy but slow)
             foreach (var series in scannedSeries.Keys)
             {
                 if (scannedSeries[series].Count > 0 && processSeriesInfos != null)
@@ -283,7 +283,14 @@ public class ParseScannedFiles
                     await processSeriesInfos.Invoke(new Tuple<bool, IList<ParserInfo>>(false, scannedSeries[series]));
                 }
             }
-                }, forceCheck);
+        }
+
+
+        foreach (var folderPath in folders)
+        {
+            try
+            {
+                await ProcessFiles(folderPath, isLibraryScan, seriesPaths, ProcessFolder, forceCheck);
             }
             catch (ArgumentException ex)
             {

API/Services/Tasks/Scanner/ProcessSeries.cs

@@ -15,6 +15,7 @@ using API.Parser;
 using API.Services.Tasks.Metadata;
 using API.SignalR;
 using Hangfire;
+using Kavita.Common;
 using Microsoft.Extensions.Logging;
 
 namespace API.Services.Tasks.Scanner;
@@ -45,9 +46,9 @@ public class ProcessSeries : IProcessSeries
     private readonly IMetadataService _metadataService;
     private readonly IWordCountAnalyzerService _wordCountAnalyzerService;
 
-    private volatile IList<Genre> _genres;
-    private volatile IList<Person> _people;
-    private volatile IList<Tag> _tags;
+    private IList<Genre> _genres;
+    private IList<Person> _people;
+    private IList<Tag> _tags;
 
     public ProcessSeries(IUnitOfWork unitOfWork, ILogger<ProcessSeries> logger, IEventHub eventHub,
         IDirectoryService directoryService, ICacheHelper cacheHelper, IReadingItemService readingItemService,
@@ -117,7 +118,7 @@ public class ProcessSeries : IProcessSeries
             _logger.LogInformation("[ScannerService] Processing series {SeriesName}", series.OriginalName);
 
             // parsedInfos[0] is not the first volume or chapter. We need to find it using a ComicInfo check (as it uses firstParsedInfo for series sort)
-            var firstParsedInfo = parsedInfos.FirstOrDefault(p => p.ComicInfo != null, parsedInfos[0]);
+            var firstParsedInfo = parsedInfos.FirstOrDefault(p => p.ComicInfo != null, firstInfo);
 
             UpdateVolumes(series, parsedInfos);
             series.Pages = series.Volumes.Sum(v => v.Pages);
@@ -235,13 +236,16 @@ public class ProcessSeries : IProcessSeries
         var chapters = series.Volumes.SelectMany(volume => volume.Chapters).ToList();
 
         // Update Metadata based on Chapter metadata
-        series.Metadata.ReleaseYear = chapters.Select(v => v.ReleaseDate.Year).Where(y => y >= 1000).Min();
+        if (!series.Metadata.ReleaseYearLocked)
+        {
+            series.Metadata.ReleaseYear = chapters.Select(v => v.ReleaseDate.Year).Where(y => y >= 1000).DefaultIfEmpty().Min();
 
             if (series.Metadata.ReleaseYear < 1000)
             {
                 // Not a valid year, default to 0
                 series.Metadata.ReleaseYear = 0;
             }
+        }
 
         // Set the AgeRating as highest in all the comicInfos
         if (!series.Metadata.AgeRatingLocked) series.Metadata.AgeRating = chapters.Max(chapter => chapter.AgeRating);
@@ -440,8 +444,22 @@ 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);
+            _logger.LogDebug("[ScannerService] Looking up volume for {VolumeNumber}", volumeNumber);
+            Volume volume;
+            try
+            {
+                volume = series.Volumes.SingleOrDefault(s => s.Name == volumeNumber);
+            }
+            catch (Exception ex)
+            {
+                if (ex.Message.Equals("Sequence contains more than one matching element"))
+                {
+                    _logger.LogCritical("[ScannerService] Kavita found corrupted volume entries on {SeriesName}. Please delete the series from Kavita via UI and rescan", series.Name);
+                    throw new KavitaException(
+                        $"Kavita found corrupted volume entries on {series.Name}. Please delete the series from Kavita via UI and rescan");
+                }
+                throw;
+            }
             if (volume == null)
             {
                 volume = DbFactory.Volume(volumeNumber);
@@ -496,7 +514,7 @@ public class ProcessSeries : IProcessSeries
             series.Volumes = nonDeletedVolumes;
         }
 
-        _logger.LogDebug("[ScannerService] Updated {SeriesName} volumes from {StartingVolumeCount} to {VolumeCount}",
+        _logger.LogDebug("[ScannerService] Updated {SeriesName} volumes from count of {StartingVolumeCount} to {VolumeCount}",
             series.Name, startingVolumeCount, series.Volumes.Count);
     }
 

API/Services/Tasks/ScannerService.cs

@@ -433,12 +433,13 @@ public class ScannerService : IScannerService
 
 
         await _processSeries.Prime();
-        var processTasks = new List<Task>();
-        async Task TrackFiles(Tuple<bool, IList<ParserInfo>> parsedInfo)
+        var processTasks = new List<Func<Task>>();
+
+        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()
             {
@@ -455,21 +456,23 @@ public class ScannerService : IScannerService
                     NormalizedName = Scanner.Parser.Parser.Normalize(pf.Series),
                     Format = pf.Format
                 }));
-                return;
+                return Task.CompletedTask;
             }
 
             totalFiles += parsedFiles.Count;
 
 
             seenSeries.Add(foundParsedSeries);
-            await _processSeries.ProcessSeriesAsync(parsedFiles, library);
+            processTasks.Add(async () => await _processSeries.ProcessSeriesAsync(parsedFiles, library));
+            return Task.CompletedTask;
         }
 
-
         var scanElapsedTime = await ScanFiles(library, libraryFolderPaths, shouldUseLibraryScan, TrackFiles, forceUpdate);
 
-
-        await Task.WhenAll(processTasks);
+        foreach (var task in processTasks)
+        {
+            await task();
+        }
 
         await _eventHub.SendMessageAsync(MessageFactory.NotificationProgress, MessageFactory.FileScanProgressEvent(string.Empty, library.Name, ProgressEventType.Ended));
 

UI/Web/src/app/admin/manage-settings/manage-settings.component.html

@@ -108,7 +108,7 @@
         </div>
 
         <div class="mb-3">
-            <label for="folder-watching" class="form-label" aria-describedby="folder-watching-info">Folder Watching</label><app-tag-badge [selectionMode]="TagBadgeCursor.Clickable" class="ms-1" ngbTooltip="This feature may not always work reliably">Experimental</app-tag-badge>
+            <label for="folder-watching" class="form-label" aria-describedby="folder-watching-info">Folder Watching</label>
             <p class="accent" id="folder-watching-info">Allows Kavita to monitor Library Folders to detect changes and invoke scanning on those changes. This allows content to be updated without manually invoking scans or waiting for nightly scans.</p>
             <div class="form-check form-switch">
                 <input id="folder-watching" type="checkbox" class="form-check-input" formControlName="enableFolderWatching" role="switch">

UI/Web/src/app/cards/_modals/edit-series-modal/edit-series-modal.component.html

@@ -70,7 +70,7 @@
                     <ng-template ngbNavContent>
 
                         <div class="row g-0">
-                            <div class="col-md-12">
+                            <div class="col-lg-8 col-md-12 pe-2">
                                 <div class="mb-3">
                                     <label for="collections" class="form-label">Collections </label>
                                     <app-typeahead (selectedData)="updateCollections($event)" [settings]="collectionTagSettings" [locked]="true">
@@ -83,6 +83,20 @@
                                     </app-typeahead>
                                 </div>
                             </div>
+                            <div class="col-lg-4 col-md-12">
+                                <div class="mb-3" style="width: 100%">
+                                    <label for="release-year" class="form-label">Release Year</label>
+                                    <div class="input-group {{metadata.releaseYearLocked ? 'lock-active' : ''}}">
+                                        <ng-container [ngTemplateOutlet]="lock" [ngTemplateOutletContext]="{ item: metadata, field: 'releaseYearLocked' }"></ng-container>
+                                        <input type="number" class="form-control" id="release-year" formControlName="releaseYear" maxlength="4" minlength="4" [class.is-invalid]="editSeriesForm.get('releaseYear')?.invalid && editSeriesForm.get('releaseYear')?.touched">
+                                        <ng-container *ngIf="editSeriesForm.get('releaseYear')?.errors as errors">
+                                            <p class="invalid-feedback" *ngIf="errors.pattern">
+                                                This must be a valid year greater than 1000 and 4 characters long
+                                            </p>
+                                        </ng-container>
+                                    </div>
+                                </div>
+                            </div>
                         </div>
                         
                         <div class="row g-0">

UI/Web/src/app/cards/_modals/edit-series-modal/edit-series-modal.component.ts

@@ -137,6 +137,7 @@ export class EditSeriesModalComponent implements OnInit, OnDestroy {
       ageRating: new FormControl('', []),
       publicationStatus: new FormControl('', []),
       language: new FormControl('', []),
+      releaseYear: new FormControl('', [Validators.minLength(4), Validators.maxLength(4), Validators.pattern(/[1-9]\d{3}/)]),
     });
     this.cdRef.markForCheck();
 
@@ -165,6 +166,7 @@ export class EditSeriesModalComponent implements OnInit, OnDestroy {
         this.editSeriesForm.get('ageRating')?.patchValue(this.metadata.ageRating);
         this.editSeriesForm.get('publicationStatus')?.patchValue(this.metadata.publicationStatus);
         this.editSeriesForm.get('language')?.patchValue(this.metadata.language);
+        this.editSeriesForm.get('releaseYear')?.patchValue(this.metadata.releaseYear);
         this.cdRef.markForCheck();
 
         this.editSeriesForm.get('name')?.valueChanges.pipe(takeUntil(this.onDestroy)).subscribe(val => {
@@ -200,6 +202,12 @@ export class EditSeriesModalComponent implements OnInit, OnDestroy {
           this.metadata.publicationStatusLocked = true;
           this.cdRef.markForCheck();
         });
+
+        this.editSeriesForm.get('releaseYear')?.valueChanges.pipe(takeUntil(this.onDestroy)).subscribe(val => {
+          this.metadata.releaseYear = parseInt(val + '', 10);
+          this.metadata.releaseYearLocked = true;
+          this.cdRef.markForCheck();
+        });
       }
     });