feat(api): add autoproxy endpoints

PluralKit.Core/Database/Repository/ModelRepository.Autoproxy.cs

@@ -6,7 +6,7 @@ namespace PluralKit.Core;
 
 public partial class ModelRepository
 {
-    public async Task UpdateAutoproxy(SystemId system, ulong? guildId, ulong? channelId, AutoproxyPatch patch)
+    public Task<AutoproxySettings> UpdateAutoproxy(SystemId system, ulong? guildId, ulong? channelId, AutoproxyPatch patch)
     {
         var locationStr = guildId != null ? "guild" : (channelId != null ? "channel" : "global");
         _logger.Information("Updated autoproxy for {SystemId} in location {location}: {@AutoproxyPatch}", system, locationStr, patch);
@@ -17,7 +17,7 @@ public partial class ModelRepository
             .Where("channel_id", channelId ?? 0)
         );
         _ = _dispatch.Dispatch(system, guildId, channelId, patch);
-        await _db.ExecuteQuery(query);
+        return _db.QueryFirst<AutoproxySettings>(query, "returning *");
     }
 
     // todo: this might break with differently scoped autoproxy

PluralKit.Core/Models/Autoproxy.cs

@@ -16,7 +16,7 @@ public class AutoproxySettings
 {
     public AutoproxyMode AutoproxyMode { get; }
     public MemberId? AutoproxyMember { get; }
-    public Instant LastLatchTimestamp { get; }
+    public Instant? LastLatchTimestamp { get; }
 }
 
 public static class AutoproxyExt
@@ -27,7 +27,8 @@ public static class AutoproxyExt
 
         // tbd
         o.Add("autoproxy_mode", settings.AutoproxyMode.ToString().ToLower());
-        o.Add("autoproxy_member", memberHid);
+        o.Add("autoproxy_member", settings.AutoproxyMode == AutoproxyMode.Front ? null : memberHid);
+        o.Add("last_latch_timestamp", settings.LastLatchTimestamp?.FormatExport());
 
         return o;
     }

PluralKit.Core/Models/Patch/AutoproxyPatch.cs

@@ -1,3 +1,5 @@
+using Newtonsoft.Json.Linq;
+
 using NodaTime;
 
 using SqlKata;
@@ -16,4 +18,30 @@ public class AutoproxyPatch: PatchObject
         .With("autoproxy_member", AutoproxyMember)
         .With("last_latch_timestamp", LastLatchTimestamp)
     );
+
+    public new void AssertIsValid()
+    {
+        // this is checked in FromJson
+        // not really the best way to do this, maybe fix at some point?
+        if ((int?)AutoproxyMode.Value == -1)
+            Errors.Add(new("autoproxy_mode"));
+    }
+
+    public static AutoproxyPatch FromJson(JObject o, MemberId? autoproxyMember = null)
+    {
+        var p = new AutoproxyPatch();
+
+        if (o.ContainsKey("autoproxy_mode"))
+        {
+            var (autoproxyMode, error) = o.Value<JToken>("autoproxy_mode").ParseAutoproxyMode();
+            if (error != null)
+                p.AutoproxyMode = Partial<AutoproxyMode>.Present((AutoproxyMode)(-1));
+            else
+                p.AutoproxyMode = autoproxyMode.Value;
+        }
+
+        p.AutoproxyMember = autoproxyMember ?? Partial<MemberId?>.Absent;
+
+        return p;
+    }
 }