Move database/mapper setup code to Core

PluralKit.Bot/Bot.cs

@@ -27,21 +27,8 @@ namespace PluralKit.Bot
         private async Task MainAsync()
         {
             Console.WriteLine("Starting PluralKit...");
-
-            // Dapper by default tries to pass ulongs to Npgsql, which rejects them since PostgreSQL technically
-            // doesn't support unsigned types on its own.
-            // Instead we add a custom mapper to encode them as signed integers instead, converting them back and forth.
-            SqlMapper.RemoveTypeMap(typeof(ulong));
-            SqlMapper.AddTypeHandler<ulong>(new UlongEncodeAsLongHandler());
-            Dapper.DefaultTypeMap.MatchNamesWithUnderscores = true;
-
-            // Also, use NodaTime. it's good.
-            NpgsqlConnection.GlobalTypeMapper.UseNodaTime();
-            // With the thing we add above, Npgsql already handles NodaTime integration
-            // This makes Dapper confused since it thinks it has to convert it anyway and doesn't understand the types
-            // So we add a custom type handler that literally just passes the type through to Npgsql
-            SqlMapper.AddTypeHandler(new PassthroughTypeHandler<Instant>());
-            SqlMapper.AddTypeHandler(new PassthroughTypeHandler<LocalDate>());
+            
+            DatabaseUtils.Init();
             
             using (var services = BuildServiceProvider())
             {

PluralKit.Bot/Utils.cs

@@ -61,33 +61,6 @@ namespace PluralKit.Bot
         }
     }
 
-    class UlongEncodeAsLongHandler : SqlMapper.TypeHandler<ulong>
-    {
-        public override ulong Parse(object value)
-        {
-            // Cast to long to unbox, then to ulong (???)
-            return (ulong)(long)value;
-        }
-
-        public override void SetValue(IDbDataParameter parameter, ulong value)
-        {
-            parameter.Value = (long)value;
-        }
-    }
-
-    class PassthroughTypeHandler<T> : SqlMapper.TypeHandler<T>
-    {
-        public override void SetValue(IDbDataParameter parameter, T value)
-        {
-            parameter.Value = value;
-        }
-
-        public override T Parse(object value)
-        {
-            return (T) value;
-        }
-    }
-
     class PKSystemTypeReader : TypeReader
     {
         public override async Task<TypeReaderResult> ReadAsync(ICommandContext context, string input, IServiceProvider services)

PluralKit.Core/DatabaseUtils.cs

@@ -0,0 +1,55 @@
+using System.Data;
+using Dapper;
+using NodaTime;
+using Npgsql;
+
+namespace PluralKit
+{
+    public static class DatabaseUtils
+    {
+        public static void Init()
+        {
+            // Dapper by default tries to pass ulongs to Npgsql, which rejects them since PostgreSQL technically
+            // doesn't support unsigned types on its own.
+            // Instead we add a custom mapper to encode them as signed integers instead, converting them back and forth.
+            SqlMapper.RemoveTypeMap(typeof(ulong));
+            SqlMapper.AddTypeHandler<ulong>(new UlongEncodeAsLongHandler());
+            Dapper.DefaultTypeMap.MatchNamesWithUnderscores = true;
+
+            // Also, use NodaTime. it's good.
+            NpgsqlConnection.GlobalTypeMapper.UseNodaTime();
+            // With the thing we add above, Npgsql already handles NodaTime integration
+            // This makes Dapper confused since it thinks it has to convert it anyway and doesn't understand the types
+            // So we add a custom type handler that literally just passes the type through to Npgsql
+            SqlMapper.AddTypeHandler(new PassthroughTypeHandler<Instant>());
+            SqlMapper.AddTypeHandler(new PassthroughTypeHandler<LocalDate>());
+        }
+        
+        class UlongEncodeAsLongHandler : SqlMapper.TypeHandler<ulong>
+        {
+            public override ulong Parse(object value)
+            {
+                // Cast to long to unbox, then to ulong (???)
+                return (ulong)(long)value;
+            }
+
+            public override void SetValue(IDbDataParameter parameter, ulong value)
+            {
+                parameter.Value = (long)value;
+            }
+        }
+
+        class PassthroughTypeHandler<T> : SqlMapper.TypeHandler<T>
+        {
+            public override void SetValue(IDbDataParameter parameter, T value)
+            {
+                parameter.Value = value;
+            }
+
+            public override T Parse(object value)
+            {
+                return (T) value;
+            }
+        }
+    }
+}

PluralKit.Web/Startup.cs

@@ -20,14 +20,16 @@ namespace PluralKit.Web
         // This method gets called by the runtime. Use this method to add services to the container.
         public void ConfigureServices(IServiceCollection services)
         {
+            DatabaseUtils.Init();
+
             var config = Configuration.GetSection("PluralKit").Get<CoreConfig>();
             
             services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
             
             services
-                .AddSingleton<IDbConnection, NpgsqlConnection>(_ => new NpgsqlConnection(config.Database))
-                .AddSingleton<SystemStore>()
-                .AddSingleton<MemberStore>()
+                .AddScoped<IDbConnection, NpgsqlConnection>(_ => new NpgsqlConnection(config.Database))
+                .AddTransient<SystemStore>()
+                .AddTransient<MemberStore>()
                 .AddSingleton(config);
         }