Refactor member updates to use a patch object

PluralKit.Core/Models/Patch/MemberPatch.cs

@@ -0,0 +1,44 @@
+#nullable enable
+
+using NodaTime;
+
+namespace PluralKit.Core
+{
+    public class MemberPatch: PatchObject<MemberId, PKMember>
+    {
+        public Partial<string> Name { get; set; }
+        public Partial<string?> DisplayName { get; set; }
+        public Partial<string?> Color { get; set; }
+        public Partial<LocalDate?> Birthday { get; set; }
+        public Partial<string?> Pronouns { get; set; }
+        public Partial<string?> Description { get; set; }
+        public Partial<ProxyTag[]> ProxyTags { get; set; }
+        public Partial<bool> KeepProxy { get; set; }
+        public Partial<int> MessageCount { get; set; }
+        public Partial<PrivacyLevel> Visibility { get; set; }
+        public Partial<PrivacyLevel> NamePrivacy { get; set; }
+        public Partial<PrivacyLevel> DescriptionPrivacy { get; set; }
+        public Partial<PrivacyLevel> PronounPrivacy { get; set; }
+        public Partial<PrivacyLevel> BirthdayPrivacy { get; set; }
+        public Partial<PrivacyLevel> AvatarPrivacy { get; set; }
+        public Partial<PrivacyLevel> MetadataPrivacy { get; set; }
+
+        public override UpdateQueryBuilder Apply(UpdateQueryBuilder b) => b
+            .With("name", Name)
+            .With("display_name", DisplayName)
+            .With("color", Color)
+            .With("birthday", Birthday)
+            .With("pronouns", Pronouns)
+            .With("description", Description)
+            .With("proxy_tags", ProxyTags)
+            .With("keep_proxy", KeepProxy)
+            .With("message_count", MessageCount)
+            .With("member_visibility", Visibility)
+            .With("name_privacy", NamePrivacy)
+            .With("description_privacy", DescriptionPrivacy)
+            .With("pronoun_privacy", PronounPrivacy)
+            .With("birthday_privacy", BirthdayPrivacy)
+            .With("avatar_privacy", AvatarPrivacy)
+            .With("metadata_privacy", MetadataPrivacy);
+    }
+}

PluralKit.Core/Models/Patch/PatchObject.cs

@@ -0,0 +1,9 @@
+using PluralKit.Core;
+
+namespace PluralKit.Core
+{
+    public abstract class PatchObject<TKey, TObj>
+    {
+        public abstract UpdateQueryBuilder Apply(UpdateQueryBuilder b);
+    }
+}