import { State } from "./channel" ; import { Coder } from "./coders" ; interface FieldRecord { name : string ; type : Coder < any > ; } export type Side = "server" | "client" ; export interface PacketRegistryEntry { readonly id : number ; readonly name : string ; readonly state : State ; readonly side : Side ; readonly coder : Coder < any > ; } export type FieldType < T > = ( type : Coder < T > ) => ( target : any , key : string ) => void ; export type PacketType = ( side : Side , id : number , state : State ) => ( constructor : Function ) => void ; export const PacketMetadata = Symbol ( "PacketMetadata" ) ; export const PacketFieldsMetadata = Symbol ( "PacketFieldsMetadata" ) ; param clazz export function getPacketRegistryEntry ( clazz ) { return clazz . prototype [ PacketMetadata ] ; } param type see export function Field < T > ( type ) { return ( target , key ) => { const container = target ; if ( ! container [ PacketFieldsMetadata ] ) { container [ PacketFieldsMetadata ] = [ ] ; } container [ PacketFieldsMetadata ] . push ( { name : key , type } ) ; } ; } param side param id param state export function Packet ( side , id , state , name = "" ) { return ( constructor ) => { const container = constructor . prototype ; const fields = container [ PacketFieldsMetadata ] || [ ] ; container [ PacketMetadata ] = { id , name : name || constructor . name , side , state , coder : { encode ( buffer , value ) { fields . forEach ( ( cod ) => { cod . type . encode ( buffer , value [ cod . name ] ) ; } ) ; } , decode ( buffer ) { const value = newCall ( constructor ) ; fields . forEach ( ( cod ) => { try { value [ cod . name ] = cod . type . decode ( buffer ) ; } catch ( e ) { console . error ( new Error ( `Exception during reciving packet [${ id }]${ constructor . name }` ) ) ; console . error ( e ) ; } } ) ; return value ; } , } , } as PacketRegistryEntry ; } ; } function newCall ( Cls ) { return new ( Function . prototype . bind . apply ( Cls , arguments as any ) ) ; }