add lowdb

src/database/database.schema.ts

@@ -0,0 +1,101 @@
+// database.schema.ts
+
+export interface Customer {
+    id: number;
+    firstNameEn: string;
+    lastNameEn: string;
+    // firstNameJp: string;
+    // lastNameJp: string;
+    // firstNameJpKana: string;
+    // lastNameJpKana: string;
+    email: string;
+    // email2?: string;
+    mobile: string;
+    // originAdd1: string;
+    // originAdd2: string;
+    // originAdd3: string;
+    // originCity: string;
+    // originState: string;
+    // originPostcode: string;
+    // originCountry: string;
+    // localAdd1: string;
+    // localAdd2: string;
+    // localAdd3: string;
+    // localCity: string;
+    // localState: string;
+    // localPostcode: string;
+    // localCountry: string;
+    // preferLang: string;
+    // dob: string; // ISO string
+    // gender: string;
+    // martial: string;
+    // occupation: string;
+    // ecName: string;
+    // ecRelation: string;
+    // ecEmail: string;
+    // ecMobile: string;
+    // initialOutReach?: string;
+    // initialOutReachRemark?: string;
+    // consentGiven?: string;
+    // contentDate?: string;
+    // status: string;
+    // remarks: string;
+    // potcustId?: string;
+    // isDeleted: boolean;
+}
+
+export interface User {
+    id: number;
+    username: string;
+    email: string;
+    firstName: string;
+    lastName: string;
+    password: string;
+    isDeleted: boolean;
+}
+
+export interface CustomerDependant {
+    id: number;
+    custId: string;
+    // deptSeq: number;
+    firstNameEn: string;
+    lastNameEn: string;
+    // firstNameJp: string;
+    // lastNameJp: string;
+    // firstNameJpKana: string;
+    // lastNameJpKana: string;
+    email: string;
+    email2?: string;
+    // mobile: string;
+    // originAdd1: string;
+    // originAdd2: string;
+    // originAdd3: string;
+    // originCity: string;
+    // originState: string;
+    // originPostcode: string;
+    // originCountry: string;
+    // localAdd1: string;
+    // localAdd2: string;
+    // localAdd3: string;
+    // localCity: string;
+    // localState: string;
+    // localPostcode: string;
+    // localCountry: string;
+    // preferLang: string;
+    // dob: string;
+    // gender: string;
+    // martial: string;
+    // occupation: string;
+    // ecName: string;
+    // ecRelation: string;
+    // ecEmail: string;
+    // ecMobile: string;
+    // isDeleted: boolean;
+}
+
+// Lowdb root schema
+export interface DBSchema {
+    customers: Customer[];
+    users: User[];
+    customerDependants: CustomerDependant[];
+}

src/database/database.ts

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+import { Low } from "lowdb";
+import { JSONFile } from "lowdb/node";
+import { DBSchema } from "./database.schema";
+import { defaultAdminUser } from "./defaultAdminUser";
+import path from "path";
+
+// File path for db.json
+const file = path.resolve(process.cwd(), "src/database/db.json");
+const adapter = new JSONFile<DBSchema>(file);
+const db = new Low<DBSchema>(adapter, {
+  customers: [],
+  users: [],
+  customerDependants: [],
+});
+
+
+// Helper to generate next id for a collection
+export function getNextId<T extends { id: number }>(items: T[]): number {
+  if (!items || items.length === 0) return 1;
+  return Math.max(...items.map((item) => item.id)) + 1;
+}
+
+// Initialize DB and ensure default admin user exists
+export async function initDB() {
+  await db.read();
+  db.data ||= { customers: [], users: [], customerDependants: [] };
+  if (db.data.users.length === 0) {
+    db.data.users.push(defaultAdminUser);
+    await db.write();
+  }
+}
+
+export { db };

src/database/db.json

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+{
+  "customers": [],
+  "users": [
+    {
+      "id": 1,
+      "username": "admin",
+      "email": "admin@example.com",
+      "firstName": "Admin",
+      "lastName": "User",
+      "password": "admin123",
+      "isDeleted": false
+    }
+  ],
+  "customerDependants": []
+}

src/database/defaultAdminUser.ts

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+import { User } from "./database.schema";
+
+export const defaultAdminUser: User = {
+  id: 1,
+  username: "admin",
+  email: "admin@example.com",
+  firstName: "Admin",
+  lastName: "User",
+  password: "admin123", // You should hash this in production
+  isDeleted: false,
+};