Login flow working

src/link_codes.ts

@@ -1,20 +1,39 @@
 import { v4 as uuid } from 'uuid';
 
+export type Association = {
+  authToken: string
+  userId: string
+  nickname: string  
+}
+
 export interface LinkCodes {
   mint(): string
   clear(): any
   count(): Number
+  has(linkCode: string): boolean
+  associate(linkCode: string, association: Association): any
+  associationFor(linkCode: string): Association | undefined
 }
 
 export class InMemoryLinkCodes implements LinkCodes {
-  linkCodes: Record<string, string>  = {}
+  linkCodes: Record<string, Association | undefined>  = {}
 
   mint() {
     const linkCode = uuid();
-    this.linkCodes[linkCode] = ""
+    this.linkCodes[linkCode] = undefined
     return linkCode
   }
   clear = () => { this.linkCodes = {} }
   count = () => Object.keys(this.linkCodes).length
+  has = (linkCode: string) => Object.keys(this.linkCodes).includes(linkCode)
+  associate = (linkCode: string, association: Association) => {
+    if(this.has(linkCode)) 
+      this.linkCodes[linkCode] = association;
+    else
+      throw `Invalid linkCode ${linkCode}`
+  }
+  associationFor = (linkCode: string) => {
+    return this.linkCodes[linkCode]!;
+  }
 }