Added migration files

src/EllieBot/Migrations/MigrationQueries.cs

@@ -0,0 +1,54 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Migrations;
+using EllieBot.Db.Models;
+
+namespace EllieBot.Migrations;
+
+public static class MigrationQueries
+{
+    public static void MigrateRero(MigrationBuilder migrationBuilder)
+    {
+        if (migrationBuilder.IsMySql())
+        {
+            migrationBuilder.Sql(
+                @"INSERT IGNORE into reactionroles(guildid, channelid, messageid, emote, roleid, `group`, levelreq, dateadded)
+select guildid, channelid, messageid, emotename, roleid, exclusive, 0, reactionrolemessage.dateadded
+from reactionrole
+left join reactionrolemessage on reactionrolemessage.id = reactionrole.reactionrolemessageid
+left join guildconfigs on reactionrolemessage.guildconfigid = guildconfigs.id;");
+        }
+        else if (migrationBuilder.IsSqlite())
+        {
+            migrationBuilder.Sql(
+                @"insert or ignore into reactionroles(guildid, channelid, messageid, emote, roleid, 'group', levelreq, dateadded)
+select guildid, channelid, messageid, emotename, roleid, exclusive, 0, reactionrolemessage.dateadded
+from reactionrole
+left join reactionrolemessage on reactionrolemessage.id = reactionrole.reactionrolemessageid
+left join guildconfigs on reactionrolemessage.guildconfigid = guildconfigs.id;");
+        }
+        else if (migrationBuilder.IsNpgsql())
+        {
+            migrationBuilder.Sql(@"insert into reactionroles(guildid, channelid, messageid, emote, roleid, ""group"", levelreq, dateadded)
+            select guildid, channelid, messageid, emotename, roleid, exclusive::int, 0, reactionrolemessage.dateadded
+                from reactionrole
+                left join reactionrolemessage on reactionrolemessage.id = reactionrole.reactionrolemessageid
+            left join guildconfigs on reactionrolemessage.guildconfigid = guildconfigs.id
+            ON CONFLICT DO NOTHING;");
+        }
+        else
+        {
+            throw new NotSupportedException("This database provider doesn't have an implementation for MigrateRero");
+        }
+    }
+
+    public static void GuildConfigCleanup(MigrationBuilder builder)
+    {
+        builder.Sql($"""
+                     DELETE FROM "StreamRoleBlacklistedUser" WHERE "StreamRoleSettingsId" is NULL;
+                     """);
+
+        builder.Sql($"""
+                     DELETE FROM "DelMsgOnCmdChannel" WHERE "GuildConfigId" is NULL;
+                     """);
+    }
+}