use more generic function for time conversions

.dist/direct.js

@@ -3,6 +3,7 @@ import { Channel } from "./channel.js";
 import { Message } from "./message.js";
 import { User } from "./user.js";
 import { Permissions } from "./permissions.js";
+import { SnowFlake } from "./snowflake.js";
 class Direct extends Guild {
     constructor(json, owner) {
         super(-1, owner, null);
@@ -95,7 +96,7 @@ class Group extends Channel {
         this.mentions = 0;
         this.setUpInfiniteScroller();
         if (this.lastmessageid) {
-            this.position = Number((BigInt(this.lastmessageid) >> 22n) + 1420070400000n);
+            this.position = SnowFlake.stringToUnixTime(this.lastmessageid);
         }
         this.position = -Math.max(this.position, this.getUnixTime());
     }