Close all sockets on shutdown

Sources/App/Management/SQLiteDatabase.swift

@@ -174,4 +174,8 @@ final class SQLiteDatabase {
         }
         return tables.play(card: card, player: player)
     }
+    
+    func disconnectAllSockets() {
+        tables.disconnectAllSockets()
+    }
 }

Sources/App/Management/TableManagement.swift

@@ -199,4 +199,8 @@ final class TableManagement {
         // TODO: Save new table
         return .success
     }
+    
+    func disconnectAllSockets() {
+        tables.values.forEach { $0.disconnectAllPlayers() }
+    }
 }

Sources/App/Model/Tables/AbstractTable.swift

@@ -123,6 +123,10 @@ extension AbstractTable: ManageableTable {
         sendUpdateToAllPlayers()
         return
     }
+    
+    func disconnectAllPlayers() {
+        players.forEach { $0.disconnect() }
+    }
 
     func sendUpdateToAllPlayers() {
         players.enumerated().forEach { playerIndex, player in

Sources/App/Model/Tables/ManageableTable.swift

@@ -31,4 +31,6 @@ protocol ManageableTable {
     func disconnect(player name: PlayerName)
 
     func sendUpdateToAllPlayers()
+    
+    func disconnectAllPlayers()
 }

Sources/App/configure.swift

@@ -32,6 +32,13 @@ public func configure(_ app: Application) throws {
 
     let db = app.databases.database(.sqlite, logger: .init(label: "Init"), on: app.databases.eventLoopGroup.next())!
     server = try SQLiteDatabase(db: db)
+    
+    // Gracefully shut down by closing potentially open socket
+    DispatchQueue.global(qos: .utility).asyncAfter(deadline: .now() + .seconds(5)) {
+        _ = app.server.onShutdown.always { _ in
+            server.disconnectAllSockets()
+        }
+    }
 
     // register routes
     try routes(app)