basic stracture and auth

in memory db :)

packages/shared/package.json

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+{
+  "name": "@fitai/shared",
+  "version": "1.0.0",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc",
+    "dev": "tsc --watch",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "zod": "^3.22.0"
+  },
+  "devDependencies": {
+    "typescript": "^5.0.0"
+  }
+}

packages/shared/src/index.ts

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+export * from './types'
+export * from './schemas'
+export * from './utils'

packages/shared/src/schemas/index.ts

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+import { z } from 'zod'
+
+export const UserSchema = z.object({
+  id: z.string(),
+  email: z.string().email(),
+  firstName: z.string().min(1),
+  lastName: z.string().min(1),
+  role: z.enum(['admin', 'trainer', 'client']),
+  createdAt: z.date(),
+  updatedAt: z.date(),
+})
+
+export const ClientSchema = z.object({
+  id: z.string(),
+  userId: z.string(),
+  membershipType: z.enum(['basic', 'premium', 'vip']),
+  membershipStatus: z.enum(['active', 'inactive', 'suspended']),
+  joinDate: z.date(),
+  lastVisit: z.date().optional(),
+  emergencyContact: z.object({
+    name: z.string(),
+    phone: z.string(),
+    relationship: z.string(),
+  }),
+})
+
+export const PaymentSchema = z.object({
+  id: z.string(),
+  clientId: z.string(),
+  amount: z.number().positive(),
+  currency: z.string(),
+  status: z.enum(['pending', 'completed', 'failed', 'refunded']),
+  paymentMethod: z.enum(['cash', 'card', 'bank_transfer']),
+  dueDate: z.date(),
+  paidAt: z.date().optional(),
+  description: z.string(),
+})
+
+export const AttendanceSchema = z.object({
+  id: z.string(),
+  clientId: z.string(),
+  checkInTime: z.date(),
+  checkOutTime: z.date().optional(),
+  type: z.enum(['gym', 'class', 'personal_training']),
+  notes: z.string().optional(),
+})

packages/shared/src/types/index.ts

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+export interface User {
+  id: string
+  email: string
+  firstName: string
+  lastName: string
+  role: 'admin' | 'trainer' | 'client'
+  createdAt: Date
+  updatedAt: Date
+}
+
+export interface Client {
+  id: string
+  userId: string
+  user: User
+  membershipType: 'basic' | 'premium' | 'vip'
+  membershipStatus: 'active' | 'inactive' | 'suspended'
+  joinDate: Date
+  lastVisit?: Date
+  emergencyContact: {
+    name: string
+    phone: string
+    relationship: string
+  }
+}
+
+export interface Payment {
+  id: string
+  clientId: string
+  client: Client
+  amount: number
+  currency: string
+  status: 'pending' | 'completed' | 'failed' | 'refunded'
+  paymentMethod: 'cash' | 'card' | 'bank_transfer'
+  dueDate: Date
+  paidAt?: Date
+  description: string
+}
+
+export interface Attendance {
+  id: string
+  clientId: string
+  client: Client
+  checkInTime: Date
+  checkOutTime?: Date
+  type: 'gym' | 'class' | 'personal_training'
+  notes?: string
+}
+
+export interface Notification {
+  id: string
+  userId: string
+  title: string
+  message: string
+  type: 'payment_reminder' | 'attendance' | 'promotion' | 'system'
+  read: boolean
+  createdAt: Date
+}

packages/shared/src/utils/index.ts

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+export const formatDate = (date: Date): string => {
+  return new Intl.DateTimeFormat('en-US', {
+    year: 'numeric',
+    month: 'short',
+    day: 'numeric',
+  }).format(date)
+}
+
+export const formatCurrency = (
+  amount: number,
+  currency: string = 'USD'
+): string => {
+  return new Intl.NumberFormat('en-US', {
+    style: 'currency',
+    currency,
+  }).format(amount)
+}
+
+export const calculateDaysBetween = (startDate: Date, endDate: Date): number => {
+  const timeDiff = endDate.getTime() - startDate.getTime()
+  return Math.ceil(timeDiff / (1000 * 3600 * 24))
+}
+
+export const generateId = (): string => {
+  return Math.random().toString(36).substr(2, 9)
+}

packages/shared/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es2020",
+    "module": "commonjs",
+    "lib": ["es2020"],
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "types": ["node"]
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}