Create a new sales registry app with identity verification features

Initial commit of the React application with UI components, form, camera, and indexedDB integration for sale data management.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 91318273-c764-4fd4-be04-bdc12c38af32
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/02867739-9ff7-4441-aca2-12e0153376c5.jpg

server/storage.ts

@@ -0,0 +1,39 @@
+import { users, type User, type InsertUser } from "@shared/schema";
+
+// modify the interface with any CRUD methods
+// you might need
+
+export interface IStorage {
+  getUser(id: number): Promise<User | undefined>;
+  getUserByUsername(username: string): Promise<User | undefined>;
+  createUser(user: InsertUser): Promise<User>;
+}
+
+export class MemStorage implements IStorage {
+  private users: Map<number, User>;
+  currentId: number;
+
+  constructor() {
+    this.users = new Map();
+    this.currentId = 1;
+  }
+
+  async getUser(id: number): Promise<User | undefined> {
+    return this.users.get(id);
+  }
+
+  async getUserByUsername(username: string): Promise<User | undefined> {
+    return Array.from(this.users.values()).find(
+      (user) => user.username === username,
+    );
+  }
+
+  async createUser(insertUser: InsertUser): Promise<User> {
+    const id = this.currentId++;
+    const user: User = { ...insertUser, id };
+    this.users.set(id, user);
+    return user;
+  }
+}
+
+export const storage = new MemStorage();