feat: rewrite database schema for localized autoproxy

PluralKit.Core/Models/Autoproxy.cs

@@ -0,0 +1,59 @@
+using Newtonsoft.Json.Linq;
+
+using NodaTime;
+
+namespace PluralKit.Core;
+
+public enum AutoproxyMode
+{
+    Off = 1,
+    Front = 2,
+    Latch = 3,
+    Member = 4
+}
+
+public class AutoproxySettings
+{
+    public AutoproxyMode AutoproxyMode { get; }
+    public MemberId? AutoproxyMember { get; }
+    public Instant LastLatchTimestamp { get; }
+}
+
+public static class AutoproxyExt
+{
+    public static JObject ToJson(this AutoproxySettings settings, string? memberHid = null)
+    {
+        var o = new JObject();
+
+        // tbd
+        o.Add("autoproxy_mode", settings.AutoproxyMode.ToString().ToLower());
+        o.Add("autoproxy_member", memberHid);
+
+        return o;
+    }
+
+    public static (AutoproxyMode?, ValidationError?) ParseAutoproxyMode(this JToken o)
+    {
+        if (o.Type == JTokenType.Null)
+            return (AutoproxyMode.Off, null);
+        if (o.Type != JTokenType.String)
+            return (null, new ValidationError("autoproxy_mode"));
+
+        var value = o.Value<string>();
+
+        switch (value)
+        {
+            case "off":
+                return (AutoproxyMode.Off, null);
+            case "front":
+                return (AutoproxyMode.Front, null);
+            case "latch":
+                return (AutoproxyMode.Latch, null);
+            case "member":
+                return (AutoproxyMode.Member, null);
+            default:
+                return (null,
+                    new ValidationError("autoproxy_mode", $"Value '{value}' is not a valid autoproxy mode."));
+        }
+    }
+}