Metadata Downloading (#3525)

API/Data/ManualMigrations/v0.8.0/MigrateChapterFields.cs

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+using System;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using API.Entities;
+using API.Entities.History;
+using API.Services.Tasks.Scanner.Parser;
+using Kavita.Common.EnvironmentInfo;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+namespace API.Data.ManualMigrations;
+
+
+
+/// <summary>
+/// Introduced in v0.8.0, this migrates the existing Chapter and Volume 0 -> Parser defined, MangaFile.FileName
+/// </summary>
+public static class MigrateChapterFields
+{
+    public static async Task Migrate(DataContext dataContext, IUnitOfWork unitOfWork, ILogger<Program> logger)
+    {
+        if (await dataContext.ManualMigrationHistory.AnyAsync(m => m.Name == "MigrateChapterFields"))
+        {
+            return;
+        }
+
+        logger.LogCritical(
+            "Running MigrateChapterFields migration - Please be patient, this may take some time. This is not an error");
+
+        // Update all volumes only have specials in them (rare)
+        var volumesWithJustSpecials = dataContext.Volume
+            .Include(v => v.Chapters)
+            .Where(v => v.Name == "0" && v.Chapters.All(c => c.IsSpecial))
+            .ToList();
+        logger.LogCritical(
+            "Running MigrateChapterFields migration - Updating {Count} volumes that only have specials in them", volumesWithJustSpecials.Count);
+        foreach (var volume in volumesWithJustSpecials)
+        {
+            volume.Name = $"{Parser.SpecialVolumeNumber}";
+            volume.MinNumber = Parser.SpecialVolumeNumber;
+            volume.MaxNumber = Parser.SpecialVolumeNumber;
+        }
+
+        // Update all volumes that only have loose leafs in them
+        var looseLeafVolumes = dataContext.Volume
+            .Include(v => v.Chapters)
+            .Where(v => v.Name == "0" && v.Chapters.All(c => !c.IsSpecial))
+            .ToList();
+        logger.LogCritical(
+            "Running MigrateChapterFields migration - Updating {Count} volumes that only have loose leaf chapters in them", looseLeafVolumes.Count);
+        foreach (var volume in looseLeafVolumes)
+        {
+            volume.Name = $"{Parser.DefaultChapterNumber}";
+            volume.MinNumber = Parser.DefaultChapterNumber;
+            volume.MaxNumber = Parser.DefaultChapterNumber;
+        }
+
+        // Update all MangaFile
+        logger.LogCritical(
+            "Running MigrateChapterFields migration - Updating all MangaFiles");
+        foreach (var mangaFile in dataContext.MangaFile)
+        {
+            mangaFile.FileName = Parser.RemoveExtensionIfSupported(mangaFile.FilePath);
+        }
+
+        var looseLeafChapters = await dataContext.Chapter.Where(c => c.Number == "0").ToListAsync();
+        logger.LogCritical(
+            "Running MigrateChapterFields migration - Updating {Count} loose leaf chapters", looseLeafChapters.Count);
+        foreach (var chapter in looseLeafChapters)
+        {
+            chapter.Number = Parser.DefaultChapter;
+            chapter.MinNumber = Parser.DefaultChapterNumber;
+            chapter.MaxNumber = Parser.DefaultChapterNumber;
+        }
+
+        dataContext.ManualMigrationHistory.Add(new ManualMigrationHistory()
+        {
+            Name = "MigrateChapterFields",
+            ProductVersion = BuildInfo.Version.ToString(),
+            RanAt = DateTime.UtcNow
+        });
+
+        await dataContext.SaveChangesAsync();
+
+
+        logger.LogCritical(
+            "Running MigrateChapterFields migration - Completed. This is not an error");
+    }
+}