Bugfixes (#2862)

Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>

API/Data/ManualMigrations/MigrateLowestSeriesFolderPath.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using API.Entities;
+using API.Services.Tasks.Scanner.Parser;
+using Kavita.Common.EnvironmentInfo;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+namespace API.Data.ManualMigrations;
+
+/// <summary>
+/// v0.8.0 released with a bug around LowestSeriesPath. This resets it for all users.
+/// </summary>
+public static class MigrateLowestSeriesFolderPath
+{
+    public static async Task Migrate(DataContext dataContext, IUnitOfWork unitOfWork, ILogger<Program> logger)
+    {
+        if (await dataContext.ManualMigrationHistory.AnyAsync(m => m.Name == "MigrateLowestSeriesFolderPath"))
+        {
+            return;
+        }
+
+        logger.LogCritical(
+            "Running MigrateLowestSeriesFolderPath migration - Please be patient, this may take some time. This is not an error");
+
+        var series = await dataContext.Series.Where(s => !string.IsNullOrEmpty(s.LowestFolderPath)).ToListAsync();
+        foreach (var s in series)
+        {
+            s.LowestFolderPath = string.Empty;
+            unitOfWork.SeriesRepository.Update(s);
+        }
+
+        // Save changes after processing all series
+        if (dataContext.ChangeTracker.HasChanges())
+        {
+            await dataContext.SaveChangesAsync();
+        }
+
+        dataContext.ManualMigrationHistory.Add(new ManualMigrationHistory()
+        {
+            Name = "MigrateLowestSeriesFolderPath",
+            ProductVersion = BuildInfo.Version.ToString(),
+            RanAt = DateTime.UtcNow
+        });
+
+        await dataContext.SaveChangesAsync();
+        logger.LogCritical(
+            "Running MigrateLowestSeriesFolderPath migration - Completed. This is not an error");
+    }
+}