Add per-server per-system proxy enable toggle

PluralKit.Core/Stores.cs

@@ -64,11 +64,9 @@ namespace PluralKit {
         public ISet<ulong> Blacklist { get; set; }
     }
 
-    public struct ChannelConfig
+    public class SystemGuildSettings
     {
-        public ulong Id { get; set; }
-        public bool OnList { get; set; }
-        public bool LogMessages { get; set; }
+        public bool ProxyEnabled { get; set; } = true;
     }
 
     public interface IDataStore
@@ -118,6 +116,9 @@ namespace PluralKit {
         /// <param name="system">The system to check in.</param>
         Task<IEnumerable<PKMember>> GetConflictingProxies(PKSystem system, ProxyTag tag);
 
+        Task<SystemGuildSettings> GetSystemGuildSettings(PKSystem system, ulong guild);
+        Task SetGuildSystemSettings(PKSystem system, ulong guild, SystemGuildSettings settings);
+
         /// <summary>
         /// Creates a system, auto-generating its corresponding IDs.
         /// </summary>
@@ -384,6 +385,25 @@ namespace PluralKit {
                 });
         }
 
+        public async Task<SystemGuildSettings> GetSystemGuildSettings(PKSystem system, ulong guild)
+        {
+            using (var conn = await _conn.Obtain())
+                return await conn.QuerySingleOrDefaultAsync<SystemGuildSettings>(
+                    "select * from system_guild where system = @System and guild = @Guild",
+                    new {System = system.Id, Guild = guild}) ?? new SystemGuildSettings();
+        }
+
+        public async Task SetGuildSystemSettings(PKSystem system, ulong guild, SystemGuildSettings settings)
+        {
+            using (var conn = await _conn.Obtain())
+                await conn.ExecuteAsync("insert into system_guild (system, guild, proxy_enabled) values (@System, @Guild, @ProxyEnabled) on conflict (system, guild) do update set proxy_enabled = @ProxyEnabled", new
+                {
+                    System = system.Id,
+                    Guild = guild,
+                    ProxyEnabled = settings.ProxyEnabled
+                });
+        }
+
         public async Task<PKSystem> CreateSystem(string systemName = null) {
             string hid;
             do

PluralKit.Core/db_schema.sql

@@ -20,6 +20,16 @@ create table if not exists systems
     ui_tz       text           not null default 'UTC'
 );
 
+create table if not exists system_guild
+(
+    system serial not null references systems (id) on delete cascade,
+    guild bigint not null,
+    
+    proxy_enabled bool not null default true,
+    
+    primary key (system, guild)
+);
+
 create table if not exists members
 (
     id           serial primary key,