import Foundation final class GlobalMessageIdsTable { let valueBox: ValueBox let tableId: Int32 let namespace: Int32 let sharedKey = ValueBoxKey(length: 4) let sharedBuffer = WriteBuffer() init(valueBox: ValueBox, tableId: Int32, namespace: Int32) { self.valueBox = valueBox self.tableId = tableId self.namespace = namespace } private func key(id: Int32) -> ValueBoxKey { self.sharedKey.setInt32(0, value: id) return self.sharedKey } func set(globalId: Int32, id: MessageId) { self.sharedBuffer.reset() var idPeerId: Int64 = id.peerId.toInt64() var idNamespace: Int32 = id.namespace self.sharedBuffer.write(&idPeerId, offset: 0, length: 8) self.sharedBuffer.write(&idNamespace, offset: 0, length: 4) self.valueBox.set(self.tableId, key: self.key(globalId), value: self.sharedBuffer) } func get(globalId: Int32) -> MessageId? { if let value = self.valueBox.get(self.tableId, key: self.key(globalId)) { var idPeerId: Int64 = 0 var idNamespace: Int32 = 0 value.read(&idPeerId, offset: 0, length: 8) value.read(&idNamespace, offset: 0, length: 4) return MessageId(peerId: PeerId(idPeerId), namespace: idNamespace, id: globalId) } return nil } func remove(globalId: Int32) { self.valueBox.remove(self.tableId, key: self.key(globalId)) } }