1 files changed, 123 insertions, 3 deletions
diff --git a/Jellyfin.Server.Implementations/Extensions/ServiceCollectionExtensions.cs b/Jellyfin.Server.Implementations/Extensions/ServiceCollectionExtensions.cs
index 7eee26059..932f9d625 100644
--- a/Jellyfin.Server.Implementations/Extensions/ServiceCollectionExtensions.cs
+++ b/Jellyfin.Server.Implementations/Extensions/ServiceCollectionExtensions.cs
@@ -1,8 +1,18 @@
 using System;
+using System.Collections.Generic;
 using System.IO;
+using System.Linq;
+using System.Reflection;
+using Jellyfin.Database.Implementations;
+using Jellyfin.Database.Implementations.DbConfiguration;
+using Jellyfin.Database.Implementations.Locking;
+using Jellyfin.Database.Providers.Sqlite;
 using MediaBrowser.Common.Configuration;
+using MediaBrowser.Controller.Configuration;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using JellyfinDbProviderFactory = System.Func<System.IServiceProvider, Jellyfin.Database.Implementations.IJellyfinDatabaseProvider>;
 
 namespace Jellyfin.Server.Implementations.Extensions;
 
@@ -11,17 +21,127 @@ namespace Jellyfin.Server.Implementations.Extensions;
 /// </summary>
 public static class ServiceCollectionExtensions
 {
+    private static IEnumerable<Type> DatabaseProviderTypes()
+    {
+        yield return typeof(SqliteDatabaseProvider);
+    }
+
+    private static IDictionary<string, JellyfinDbProviderFactory> GetSupportedDbProviders()
+    {
+        var items = new Dictionary<string, JellyfinDbProviderFactory>(StringComparer.InvariantCultureIgnoreCase);
+        foreach (var providerType in DatabaseProviderTypes())
+        {
+            var keyAttribute = providerType.GetCustomAttribute<JellyfinDatabaseProviderKeyAttribute>();
+            if (keyAttribute is null || string.IsNullOrWhiteSpace(keyAttribute.DatabaseProviderKey))
+            {
+                continue;
+            }
+
+            var provider = providerType;
+            items[keyAttribute.DatabaseProviderKey] = (services) => (IJellyfinDatabaseProvider)ActivatorUtilities.CreateInstance(services, providerType);
+        }
+
+        return items;
+    }
+
+    private static JellyfinDbProviderFactory? LoadDatabasePlugin(CustomDatabaseOptions customProviderOptions, IApplicationPaths applicationPaths)
+    {
+        var plugin = Directory.EnumerateDirectories(applicationPaths.PluginsPath)
+            .Where(e => Path.GetFileName(e)!.StartsWith(customProviderOptions.PluginName, StringComparison.OrdinalIgnoreCase))
+            .Order()
+            .FirstOrDefault()
+            ?? throw new InvalidOperationException($"The requested custom database plugin with the name '{customProviderOptions.PluginName}' could not been found in '{applicationPaths.PluginsPath}'");
+
+        var dbProviderAssembly = Path.Combine(plugin, Path.ChangeExtension(customProviderOptions.PluginAssembly, "dll"));
+        if (!File.Exists(dbProviderAssembly))
+        {
+            throw new InvalidOperationException($"Could not find the requested assembly at '{dbProviderAssembly}'");
+        }
+
+        // we have to load the assembly without proxy to ensure maximum performance for this.
+        var assembly = Assembly.LoadFrom(dbProviderAssembly);
+        var dbProviderType = assembly.GetExportedTypes().FirstOrDefault(f => f.IsAssignableTo(typeof(IJellyfinDatabaseProvider)))
+            ?? throw new InvalidOperationException($"Could not find any type implementing the '{nameof(IJellyfinDatabaseProvider)}' interface.");
+
+        return (services) => (IJellyfinDatabaseProvider)ActivatorUtilities.CreateInstance(services, dbProviderType);
+    }
+
     /// <summary>
     /// Adds the <see cref="IDbContextFactory{TContext}"/> interface to the service collection with second level caching enabled.
     /// </summary>
     /// <param name="serviceCollection">An instance of the <see cref="IServiceCollection"/> interface.</param>
+    /// <param name="configurationManager">The server configuration manager.</param>
+    /// <param name="configuration">The startup Configuration.</param>
     /// <returns>The updated service collection.</returns>
-    public static IServiceCollection AddJellyfinDbContext(this IServiceCollection serviceCollection)
+    public static IServiceCollection AddJellyfinDbContext(
+        this IServiceCollection serviceCollection,
+        IServerConfigurationManager configurationManager,
+        IConfiguration configuration)
     {
+        var efCoreConfiguration = configurationManager.GetConfiguration<DatabaseConfigurationOptions>("database");
+        JellyfinDbProviderFactory? providerFactory = null;
+
+        if (efCoreConfiguration?.DatabaseType is null)
+        {
+            var cmdMigrationArgument = configuration.GetValue<string>("migration-provider");
+            if (!string.IsNullOrWhiteSpace(cmdMigrationArgument))
+            {
+                efCoreConfiguration = new DatabaseConfigurationOptions()
+                {
+                    DatabaseType = cmdMigrationArgument,
+                };
+            }
+            else
+            {
+                // when nothing is setup via new Database configuration, fallback to SQLite with default settings.
+                efCoreConfiguration = new DatabaseConfigurationOptions()
+                {
+                    DatabaseType = "Jellyfin-SQLite",
+                    LockingBehavior = DatabaseLockingBehaviorTypes.NoLock
+                };
+                configurationManager.SaveConfiguration("database", efCoreConfiguration);
+            }
+        }
+
+        if (efCoreConfiguration.DatabaseType.Equals("PLUGIN_PROVIDER", StringComparison.OrdinalIgnoreCase))
+        {
+            if (efCoreConfiguration.CustomProviderOptions is null)
+            {
+                throw new InvalidOperationException("The custom database provider must declare the custom provider options to work");
+            }
+
+            providerFactory = LoadDatabasePlugin(efCoreConfiguration.CustomProviderOptions, configurationManager.ApplicationPaths);
+        }
+        else
+        {
+            var providers = GetSupportedDbProviders();
+            if (!providers.TryGetValue(efCoreConfiguration.DatabaseType.ToUpperInvariant(), out providerFactory!))
+            {
+                throw new InvalidOperationException($"Jellyfin cannot find the database provider of type '{efCoreConfiguration.DatabaseType}'. Supported types are {string.Join(", ", providers.Keys)}");
+            }
+        }
+
+        serviceCollection.AddSingleton<IJellyfinDatabaseProvider>(providerFactory!);
+
+        switch (efCoreConfiguration.LockingBehavior)
+        {
+            case DatabaseLockingBehaviorTypes.NoLock:
+                serviceCollection.AddSingleton<IEntityFrameworkCoreLockingBehavior, NoLockBehavior>();
+                break;
+            case DatabaseLockingBehaviorTypes.Pessimistic:
+                serviceCollection.AddSingleton<IEntityFrameworkCoreLockingBehavior, PessimisticLockBehavior>();
+                break;
+            case DatabaseLockingBehaviorTypes.Optimistic:
+                serviceCollection.AddSingleton<IEntityFrameworkCoreLockingBehavior, OptimisticLockBehavior>();
+                break;
+        }
+
         serviceCollection.AddPooledDbContextFactory<JellyfinDbContext>((serviceProvider, opt) =>
         {
-            var applicationPaths = serviceProvider.GetRequiredService<IApplicationPaths>();
-            opt.UseSqlite($"Filename={Path.Combine(applicationPaths.DataPath, "jellyfin.db")};Pooling=false");
+            var provider = serviceProvider.GetRequiredService<IJellyfinDatabaseProvider>();
+            provider.Initialise(opt, efCoreConfiguration);
+            var lockingBehavior = serviceProvider.GetRequiredService<IEntityFrameworkCoreLockingBehavior>();
+            lockingBehavior.Initialise(opt);
         });
 
         return serviceCollection;