add amusement ic access code encode/decode

amnet-shared/src/card.ts

@@ -1,23 +1,12 @@
+import {encodeAccessCode} from "./card-encoding";
+
 export const CARD_ID_REGEX = /^(?:[0-9]{4} ?){5}$/i;
+export const AMNET_COMPANY_ID = 597;
 
 export function generateCardNumber(): string {
-    let cardId = '';
-
-    while (true) {
-        // don't start with a 3
-        const firstDigit = Math.floor(Math.random() * 10);
-
-        if (firstDigit !== 3) {
-            cardId = firstDigit.toString();
-            break;
-        }
-    }
-
-    for (let i = 0; i < 19; i++) {
-        cardId += Math.floor(Math.random() * 10).toString();
-    }
-
-    return cardId;
+    // serial between 5000 and 99999999999
+    const serial = Math.floor(Math.random() * 99999994999) + 5000;
+    return encodeAccessCode(AMNET_COMPANY_ID, serial, 0);
 }
 
 /**

amnet-shared/src/index.ts

@@ -1,3 +1,5 @@
 export * from './api';
 export * from './card';
-export * from './gameIds';
+export * from './gameIds';
+
+export {decodeAccessCode as DecodeAMAccessCode, encodeAccessCode as EncodeAMAccessCode} from './card-encoding';