feat(client): custom colors

.gitignore

@@ -192,4 +192,4 @@ dist
 .ionide
 
 # End of https://www.toptal.com/developers/gitignore/api/nextjs,node,visualstudiocode
-
+.docker/

README.md

@@ -0,0 +1,21 @@
+# FakeMoney
+**A PayPal-like payment processor for virtual money, intended to be used for [simulation games](https://de.wikipedia.org/wiki/Schule_als_Staat).**
+
+Send and receive money from your account and businesses you own using simple URLs and QR codes.
+Install as a [PWA](https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps)
+from your browser (Firefox/Chrome/Safari) with just 3 taps and bypass tedious app store processes.
+
+
+<img src="docs/img/screenshot-login.png" width="32%" alt="Login view">&nbsp;
+<img src="docs/img/screenshot-send.png" width="32%" alt="Send view">&nbsp;
+<img src="docs/img/screenshot-receive.png" width="32%" alt="Receive view">&nbsp;
+
+## Deployment
+Is simplified using Docker and by making a few assumptions, e.g. that API and frontend are available under the same domain.
+## Development
+
+### Frontend
+Is written in angular + bootstrap.
+
+### Backend
+Uses NextJS + PostgreSQL with JWT as cookies.

client/.editorconfig

@@ -0,0 +1,17 @@
+# Editor configuration, see https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.ts]
+quote_type = single
+ij_typescript_use_double_quotes = false
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

client/.gitignore

@@ -0,0 +1,44 @@
+# See https://docs.github.com/get-started/getting-started-with-git/ignoring-files for more about ignoring files.
+
+# Compiled output
+/dist
+/tmp
+/out-tsc
+/bazel-out
+
+# Node
+/node_modules
+npm-debug.log
+yarn-error.log
+
+# IDEs and editors
+.idea/
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# Visual Studio Code
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/mcp.json
+.history/*
+
+# Miscellaneous
+/.angular/cache
+.sass-cache/
+/connect.lock
+/coverage
+/libpeerconnection.log
+testem.log
+/typings
+__screenshots__/
+
+# System files
+.DS_Store
+Thumbs.db

client/.prettierrc

@@ -0,0 +1,12 @@
+{
+  "printWidth": 100,
+  "singleQuote": true,
+  "overrides": [
+    {
+      "files": "*.html",
+      "options": {
+        "parser": "angular"
+      }
+    }
+  ]
+}

client/.vscode/extensions.json

@@ -0,0 +1,4 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=827846
+  "recommendations": ["angular.ng-template"]
+}

client/.vscode/launch.json

@@ -0,0 +1,20 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "ng serve",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: start",
+      "url": "http://localhost:4200/"
+    },
+    {
+      "name": "ng test",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: test",
+      "url": "http://localhost:9876/debug.html"
+    }
+  ]
+}

client/.vscode/mcp.json

@@ -0,0 +1,9 @@
+{
+  // For more information, visit: https://angular.dev/ai/mcp
+  "servers": {
+    "angular-cli": {
+      "command": "npx",
+      "args": ["-y", "@angular/cli", "mcp"]
+    }
+  }
+}

client/.vscode/tasks.json

@@ -0,0 +1,42 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?LinkId=733558
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "type": "npm",
+      "script": "start",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "Changes detected"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation (complete|failed)"
+          }
+        }
+      }
+    },
+    {
+      "type": "npm",
+      "script": "test",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "Changes detected"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation (complete|failed)"
+          }
+        }
+      }
+    }
+  ]
+}

client/README.md

@@ -0,0 +1,59 @@
+# Client
+
+This project was generated using [Angular CLI](https://github.com/angular/angular-cli) version 21.2.0.
+
+## Development server
+
+To start a local development server, run:
+
+```bash
+ng serve
+```
+
+Once the server is running, open your browser and navigate to `http://localhost:4200/`. The application will automatically reload whenever you modify any of the source files.
+
+## Code scaffolding
+
+Angular CLI includes powerful code scaffolding tools. To generate a new component, run:
+
+```bash
+ng generate component component-name
+```
+
+For a complete list of available schematics (such as `components`, `directives`, or `pipes`), run:
+
+```bash
+ng generate --help
+```
+
+## Building
+
+To build the project run:
+
+```bash
+ng build
+```
+
+This will compile your project and store the build artifacts in the `dist/` directory. By default, the production build optimizes your application for performance and speed.
+
+## Running unit tests
+
+To execute unit tests with the [Vitest](https://vitest.dev/) test runner, use the following command:
+
+```bash
+ng test
+```
+
+## Running end-to-end tests
+
+For end-to-end (e2e) testing, run:
+
+```bash
+ng e2e
+```
+
+Angular CLI does not come with an end-to-end testing framework by default. You can choose one that suits your needs.
+
+## Additional Resources
+
+For more information on using the Angular CLI, including detailed command references, visit the [Angular CLI Overview and Command Reference](https://angular.dev/tools/cli) page.

client/angular.json

@@ -0,0 +1,88 @@
+{
+  "$schema": "../node_modules/@angular/cli/lib/config/schema.json",
+  "version": 1,
+  "cli": {
+    "packageManager": "npm"
+  },
+  "newProjectRoot": "projects",
+  "projects": {
+    "client": {
+      "projectType": "application",
+      "schematics": {
+        "@schematics/angular:component": {
+          "style": "less"
+        }
+      },
+      "root": "",
+      "sourceRoot": "src",
+      "prefix": "app",
+      "architect": {
+        "build": {
+          "builder": "@angular/build:application",
+          "options": {
+            "outputPath": "../dist/out-tsc/client",
+            "browser": "src/main.ts",
+            "tsConfig": "tsconfig.app.json",
+            "inlineStyleLanguage": "less",
+            "assets": [
+              {
+                "glob": "**/*",
+                "input": "public"
+              }
+            ],
+            "styles": [
+              "../node_modules/bootstrap/dist/css/bootstrap.min.css",
+              "../node_modules/bootstrap-icons/font/bootstrap-icons.min.css",
+              "src/styles.less"
+            ],
+            "scripts": [
+              "../node_modules/bootstrap/dist/js/bootstrap.bundle.min.js"
+            ],
+            "polyfills": ["@angular/localize/init"]
+          },
+          "configurations": {
+            "production": {
+              "budgets": [
+                {
+                  "type": "initial",
+                  "maximumWarning": "500kB",
+                  "maximumError": "1MB"
+                },
+                {
+                  "type": "anyComponentStyle",
+                  "maximumWarning": "4kB",
+                  "maximumError": "8kB"
+                }
+              ],
+              "outputHashing": "all"
+            },
+            "development": {
+              "optimization": false,
+              "extractLicenses": false,
+              "sourceMap": true
+            }
+          },
+          "defaultConfiguration": "production"
+        },
+        "serve": {
+          "options": {
+            "proxyConfig": "proxy.json"
+          },
+          "builder": "@angular/build:dev-server",
+          "configurations": {
+            "production": {
+              "buildTarget": "client:build:production"
+            },
+            "development": {
+              "buildTarget": "client:build:development"
+            }
+          },
+          "defaultConfiguration": "development"
+        },
+        "test": {
+          "builder": "@angular/build:unit-test"
+        }
+      }
+    }
+  }
+}

client/package.json

@@ -1,12 +1,43 @@
 {
   "name": "client",
-  "version": "1.0.0",
+  "version": "0.0.0",
-  "description": "",
-  "license": "GPL-3.0",
-  "author": "",
-  "type": "commonjs",
-  "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "ng": "ng",
+    "start": "ng serve",
+    "serve": "ng serve --host 0.0.0.0",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test"
+  },
+  "private": true,
+  "packageManager": "npm@11.10.0",
+  "dependencies": {
+    "@angular/common": "^21.2.0",
+    "@angular/compiler": "^21.2.0",
+    "@angular/core": "^21.2.0",
+    "@angular/forms": "^21.2.0",
+    "@angular/platform-browser": "^21.2.0",
+    "@angular/router": "^21.2.0",
+    "@ng-bootstrap/ng-bootstrap": "^20.0.0",
+    "@popperjs/core": "^2.11.8",
+    "bootstrap": "^5.3.8",
+    "bootstrap-icons": "^1.13.1",
+    "ng-qrcode": "^21.0.0",
+    "qr-scanner": "^1.4.2",
+    "qrcode": "^1.5.4",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0"
+  },
+  "devDependencies": {
+    "@angular/build": "^21.2.0",
+    "@angular/cli": "^21.2.0",
+    "@angular/compiler-cli": "^21.2.0",
+    "@angular/localize": "^21.2.0",
+    "@types/qrcode": "^1.5.6",
+    "jsdom": "^28.0.0",
+    "less": "^4.2.0",
+    "prettier": "^3.8.1",
+    "typescript": "~5.9.2",
+    "vitest": "^4.0.8"
   }
 }

client/proxy.json

@@ -0,0 +1,8 @@
+{
+  "/api": {
+    "target": "http://localhost:3000",
+    "secure": false,
+    "changeOrigin": true,
+    "withCredentials": true
+  }
+}

client/src/app/app.config.ts

@@ -0,0 +1,17 @@
+import { ApplicationConfig, DEFAULT_CURRENCY_CODE, provideBrowserGlobalErrorListeners } from '@angular/core';
+import { provideRouter } from '@angular/router';
+
+import { routes } from './app.routes';
+import { DATE_PIPE_DEFAULT_OPTIONS } from '@angular/common';
+import { provideHttpClient, withInterceptors } from '@angular/common/http';
+import { authInterceptor } from './services/auth-interceptor';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideBrowserGlobalErrorListeners(),
+    provideRouter(routes),
+    {provide: DEFAULT_CURRENCY_CODE, useValue: ''},
+    {provide: DATE_PIPE_DEFAULT_OPTIONS, useValue: {dateFormat: 'shortDate'}},
+    provideHttpClient(withInterceptors([authInterceptor])),
+  ]
+};

client/src/app/app.html

@@ -0,0 +1,17 @@
+<main class="main">
+  <app-toast-container></app-toast-container>
+  <router-outlet></router-outlet>
+</main>
+<nav>
+  <ul ngbNav [(activeId)]="active" class="nav-tabs custom-navbar bg-body-secondary">
+    <li ngbNavItem="/send" class="custom-navitem"><a ngbNavLink routerLink="/send">
+        <i class="bi bi-cash"></i>
+    </a></li>
+    <li ngbNavItem="/receive" class="custom-navitem"><a ngbNavLink routerLink="/receive">
+        <i class="bi bi-piggy-bank"></i>
+    </a></li>
+    <li ngbNavItem="/profile" class="custom-navitem"><a ngbNavLink routerLink="/profile">
+        <i class="bi bi-person"></i>
+    </a></li>
+  </ul>
+</nav>

client/src/app/app.less

@@ -0,0 +1,35 @@
+html, body{
+    max-width: 100%;
+    overflow-x: hidden;
+}
+*{
+    text-align: center;
+}
+.custom-table {
+    //table-layout: fixed;
+    max-width: 100%;
+}
+tr{
+    padding-right: .2em;
+}
+.wrap-cell{
+    word-break: break-all;
+    white-space: normal;
+}
+.main{
+    margin-bottom: 5rem;
+    padding: 1rem;
+    overflow-y: auto;
+}
+.custom-navbar{
+    width: 100vw;
+    position: fixed;
+    bottom: 0;
+    display: flex;
+    justify-content: space-around; /* Distribute items evenly */
+    z-index: 1000;
+}
+.custom-navitem{
+    text-align: center; /* Center the content of each item */
+    flex: 1;
+}

client/src/app/app.routes.ts

@@ -0,0 +1,33 @@
+import { Routes } from '@angular/router';
+import { ScreenSend } from './screens/screen-send/screen-send';
+import { ScreenRequest } from './screens/screen-request/screen-request';
+import { ScreenProfile } from './screens/screen-profile/screen-profile';
+import { ScreenLogin } from './screens/screen-login/screen-login';
+import { authGuard } from './services/auth-guard';
+
+export const routes: Routes = [
+    {
+        path: '',
+        pathMatch:'full',
+        redirectTo: '/send',
+    },
+    {
+        path: 'login',
+        component: ScreenLogin,
+    },
+    {
+        path:'send',
+        component: ScreenSend,
+        canActivate: [authGuard],
+    },
+    {
+        path:'receive',
+        component: ScreenRequest,
+        canActivate: [authGuard],
+    },
+    {
+        path:'profile',
+        component: ScreenProfile,
+        canActivate: [authGuard],
+    },
+];

client/src/app/app.spec.ts

@@ -0,0 +1,23 @@
+import { TestBed } from '@angular/core/testing';
+import { App } from './app';
+
+describe('App', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [App],
+    }).compileComponents();
+  });
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(App);
+    const app = fixture.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it('should render title', async () => {
+    const fixture = TestBed.createComponent(App);
+    await fixture.whenStable();
+    const compiled = fixture.nativeElement as HTMLElement;
+    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, client');
+  });
+});

client/src/app/app.ts

@@ -0,0 +1,39 @@
+import { Component, inject, OnInit, signal } from '@angular/core';
+import { RouterOutlet, RouterLinkWithHref, Router, NavigationEnd } from '@angular/router';
+import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
+import {
+	NgbNav,
+	NgbNavItem,
+	NgbNavItemRole,
+	NgbNavLinkBase,
+} from '@ng-bootstrap/ng-bootstrap/nav';
+import { filter } from 'rxjs';
+import { APIService } from './services/api';
+import { ToastContainer } from "./components/toast-container/toast-container";
+
+@Component({
+  selector: 'app-root',
+  imports: [RouterOutlet, NgbModule, NgbNav, NgbNavItem, NgbNavItemRole, NgbNavLinkBase, RouterLinkWithHref, ToastContainer],
+  templateUrl: './app.html',
+  styleUrl: './app.less'
+})
+export class App implements OnInit{
+  protected readonly title = signal('client');
+  protected api = inject(APIService);
+  active = '/';
+
+  constructor(
+    private router: Router
+  ){}
+
+  ngOnInit(): void {
+    this.api.checkAuthStatus().subscribe();
+    this.router.events
+    .pipe(filter(event => event instanceof NavigationEnd))
+    .subscribe(() =>{
+      this.active = this.router.url;
+      console.log(this.active);
+    });
+  }
+
+}

client/src/app/components/modal/modal.html

@@ -0,0 +1,7 @@
+    <div class="modal-header">
+        <h4 class="modal-title" id="modal-basic-title">{{ title }}</h4>
+        <button type="button" class="btn-close" aria-label="Close" (click)="activeModal.dismiss()"></button>
+    </div>
+    <div class="modal-body text-center">
+        <ng-container *ngTemplateOutlet="body"></ng-container>
+    </div>

client/src/app/components/modal/modal.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { Modal } from './modal';
+
+describe('Modal', () => {
+  let component: Modal;
+  let fixture: ComponentFixture<Modal>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [Modal],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(Modal);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

client/src/app/components/modal/modal.ts

@@ -0,0 +1,19 @@
+import { NgTemplateOutlet } from '@angular/common';
+import { Component, Input, TemplateRef } from '@angular/core';
+import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
+
+@Component({
+  selector: 'app-modal',
+  imports: [NgTemplateOutlet],
+  templateUrl: './modal.html',
+  styleUrl: './modal.less',
+})
+export class Modal {
+  @Input({required: true}) title!: string;
+  @Input({required: true}) body!: TemplateRef<any>;
+  
+  constructor(
+    public activeModal: NgbActiveModal
+  ){}
+  
+}

client/src/app/components/toast-container/toast-container.html

@@ -0,0 +1,13 @@
+<div class="toast-container position-fixed top-0 end-0 p-3">
+  @for (notification of notifications.notifications(); track notification) {
+    <ngb-toast
+      [autohide]="true"
+      [delay]="notification.delay ?? 3000"
+      (hidden)="notifications.remove(notification)"
+    >
+      <div class="text-{{ notification.type }}">
+        {{ notification.message }}
+      </div>
+    </ngb-toast>
+  }
+</div>

client/src/app/components/toast-container/toast-container.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ToastContainer } from './toast-container';
+
+describe('ToastContainer', () => {
+  let component: ToastContainer;
+  let fixture: ComponentFixture<ToastContainer>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ToastContainer],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ToastContainer);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

client/src/app/components/toast-container/toast-container.ts

@@ -0,0 +1,13 @@
+import { Component, inject } from '@angular/core';
+import { NgbToastModule } from '@ng-bootstrap/ng-bootstrap';
+import { NotificationService } from '../../services/notification';
+
+@Component({
+  selector: 'app-toast-container',
+  imports: [NgbToastModule],
+  templateUrl: './toast-container.html',
+  styleUrl: './toast-container.less',
+})
+export class ToastContainer {
+  notifications = inject(NotificationService);
+}

client/src/app/screens/screen-login/screen-login.html

@@ -0,0 +1,77 @@
+<div class="d-flex align-items-center min-vh-100 bg-light">
+  <div class="container">
+    <div class="row justify-content-center">
+      <div class="col-lg-4 col-md-6 col-sm-8">
+        <div class="card shadow-sm">
+          <div class="card-body p-4">
+            <div class="text-center mb-4">
+              <i class="bi bi-lock-fill fs-1 text-primary"></i>
+              <h3 class="mt-2">Sign In</h3>
+            </div>
+
+            <form [formGroup]="loginForm" (ngSubmit)="onSubmit()" novalidate>
+              <!-- Email -->
+              <div class="mb-3">
+                <label for="email" class="form-label">Username</label>
+                <input
+                  type="text"
+                  id="username"
+                  class="form-control"
+                  formControlName="username"
+                  placeholder="Enter your username"
+                >
+              </div>
+
+              <!-- Password -->
+              <div class="mb-3">
+                <label for="password" class="form-label">Password</label>
+                <div class="input-group">
+                  <input
+                    [type]="showPassword ? 'text' : 'password'"
+                    id="password"
+                    class="form-control"
+                    formControlName="password"
+                    placeholder="Enter your password"
+                  >
+                  <button
+                    class="btn btn-outline-secondary"
+                    type="button"
+                    (click)="showPassword = !showPassword"
+                  >
+                    <i class="bi" [class.bi-eye-fill]="showPassword" [class.bi-eye-slash-fill]="!showPassword"></i>
+                  </button>
+                </div>
+                </div>
+
+                <!-- Submit Button -->
+              <button
+                type="submit"
+                class="btn btn-primary w-100 mb-3"
+              >
+              @if (loading()) {
+                <span> Signing In... </span>
+              }@else {
+                <span>Sign In</span>
+              }
+              </button>
+
+
+              <!-- Error Alert -->
+              @if (error()) {
+              <ngb-alert
+                type="danger"
+                (closed)="error.set(null)"
+                [dismissible]="true"
+              >
+                {{ error() }}
+              </ngb-alert>
+              }
+            </form>
+          </div>
+        </div>
+
+      </div>
+    </div>
+  </div>
+</div>
+

client/src/app/screens/screen-login/screen-login.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ScreenLogin } from './screen-login';
+
+describe('ScreenLogin', () => {
+  let component: ScreenLogin;
+  let fixture: ComponentFixture<ScreenLogin>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ScreenLogin],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ScreenLogin);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

client/src/app/screens/screen-login/screen-login.ts

@@ -0,0 +1,54 @@
+import { CommonModule } from '@angular/common';
+import { Component, signal } from '@angular/core';
+import { Validators, FormBuilder, FormGroup, FormsModule, ReactiveFormsModule, Form } from '@angular/forms';
+import { ActivatedRoute, Router } from '@angular/router';
+import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
+import { APIService } from '../../services/api';
+import { GenericMessage } from '@message/Message';
+import { NotificationService } from '../../services/notification';
+
+@Component({
+  selector: 'app-screen-login',
+  imports: [FormsModule, NgbModule, ReactiveFormsModule, CommonModule],
+  templateUrl: './screen-login.html',
+  styleUrl: './screen-login.less',
+})
+export class ScreenLogin {
+  loginForm: FormGroup;
+  submitted = false;
+  loading = signal(false);
+  showPassword = false;
+  error = signal<string|null>(null);
+
+  constructor(
+    private api: APIService,
+    private notify: NotificationService,
+    private router: Router,
+    private route: ActivatedRoute,
+    private fb: FormBuilder,
+  ) {
+    this.loginForm = this.fb.group({
+      username: ['', [Validators.required]],
+      password: ['', [Validators.required]],
+    });
+  }
+
+  onSubmit() {
+    this.submitted = true;
+    this.error.set(null);
+    this.loading.set(true)
+
+    this.api.login(this.loginForm.value.username, this.loginForm.value.password).subscribe({
+      next: () => {
+        const returnUrl = this.route.snapshot.queryParams['returnUrl'] || '/';
+        this.router.navigateByUrl(returnUrl);
+      },
+      error: (resp) => {
+        let msg: GenericMessage = resp.error;
+        this.notify.error(msg.message || 'Login failed. Please try again.');
+        this.loading.set(false);
+      }
+    });
+  }
+}
+

client/src/app/screens/screen-profile/screen-profile.html

@@ -0,0 +1,71 @@
+<div class="container py-4">
+  <!-- Profile Header -->
+  <div class="card mb-4 shadow-sm">
+    <div class="card-body text-center p-4">
+      <div class="avatar avatar-xl mb-3">
+        <i class="bi bi-person-circle fs-1 text-primary"></i>
+      <b> {{this.api.loggedInUser.displayName}} </b>
+      </div>
+      <div ngbDropdown class="d-inline-block">
+        <button type="button" class="btn btn-outline-primary" id="dropdownBasic1" ngbDropdownToggle>
+          {{ this.api.currentUser.displayName }}
+			</button>
+			<div ngbDropdownMenu aria-labelledby="dropdownBasic1">
+        @for (acc of this.api.ownedAccounts; track $index) {
+				  <button ngbDropdownItem (click)="this.api.currentUser = acc">{{ acc.displayName }}</button>
+        }
+			</div>
+		</div>
+        <h3 class="mb-1"></h3>
+      </div>
+      <div class="d-flex align-items-center justify-content-center gap-2 mb-1">
+        <i class="bi bi-wallet2 fs-4"></i>
+        <h3 class="mb-0">{{ this.api.currentUser.balance | currency}}</h3>
+      </div>
+      <button type="button" (click)="logOut()" class="btn btn-outline-secondary">Log out</button>
+    </div>
+  </div>
+
+  <!-- Recent Transactions -->
+  <div class="card mb-4 shadow-sm">
+    <div class="card-header bg-light">
+      <h5 class="mb-0">Recent Transactions</h5>
+    </div>
+    <div class="card-body p-0">
+      <div class="list-group list-group-flush">
+        <!-- Transaction Item -->
+         @for (transaction of transactions(); track $index) {
+        <div class="list-group-item">
+          <div class="d-flex justify-content-between align-items-center">
+            <div class="d-flex align-items-center">
+              <div class="me-3">
+                <i class="bi bi-person-fill fs-4 text-secondary"></i>
+              </div>
+              <div class="text-start">
+              @if (transaction.receiverID == this.api.currentUser.id) {
+                <h6 class="mb-0">{{ transaction.senderID }}</h6>
+              }@else {
+                <h6 class="mb-0">{{ transaction.receiverID }}</h6>
+              }
+                <small class="text-muted">{{ transaction.date | date:'medium' }}</small>
+              </div>
+            </div>
+            <div class="text-end">
+              @if (transaction.receiverID == this.api.currentUser.id) {
+                <h6 class="mb-0 text-success">
+                  {{ transaction.amount | currency }}
+                </h6>
+              }@else {
+                <h6 class="mb-0 text-danger">
+                  {{ - transaction.amount | currency }}
+                </h6>
+              }
+            </div>
+          </div>
+        </div>
+       }
+      @empty {<p class="text-muted">No transactions yet</p>}
+    </div>
+  </div>
+</div>
+

client/src/app/screens/screen-profile/screen-profile.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ScreenProfile } from './screen-profile';
+
+describe('ScreenProfile', () => {
+  let component: ScreenProfile;
+  let fixture: ComponentFixture<ScreenProfile>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ScreenProfile],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ScreenProfile);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

client/src/app/screens/screen-profile/screen-profile.ts

@@ -0,0 +1,43 @@
+import { CommonModule, CurrencyPipe, DatePipe } from '@angular/common';
+import { Component, inject, OnInit, signal } from '@angular/core';
+import { APIService } from '../../services/api';
+import Transaction from '@model/transaction';
+import { Router } from '@angular/router';
+import { NgbAccordionToggle, NgbDropdown, NgbDropdownItem, NgbDropdownMenu, NgbDropdownToggle } from "@ng-bootstrap/ng-bootstrap";
+
+@Component({
+  selector: 'app-screen-profile',
+  imports: [CurrencyPipe, DatePipe, CommonModule, NgbDropdown, NgbDropdownMenu, NgbDropdownToggle, NgbDropdownItem],
+  templateUrl: './screen-profile.html',
+  styleUrl: './screen-profile.less',
+})
+export class ScreenProfile implements OnInit{
+  transactions = signal<Transaction[]>([])
+
+  constructor(
+    protected api: APIService,
+    private router: Router,
+  ){}
+
+  ngOnInit(): void {
+    this.api.getTransactions().subscribe({
+      next: (transactions) => {
+        this.transactions.set(transactions);
+      },
+      error: (err) => {
+        console.error('Error fetching transactions:', err);
+      },
+    })
+  }
+  logOut(){
+    this.api.logout().subscribe({
+      next: () => {
+        this.router.navigate(['/'])
+      },
+      error: (err) => {
+        console.error('Error logging out:', err)
+      }
+    })
+  }
+
+}

client/src/app/screens/screen-request/screen-request.html

@@ -0,0 +1,57 @@
+<div class="container py-5">
+  <div class="row justify-content-center">
+    <div class="col-lg-6 col-md-8">
+      <div class="card shadow-sm">
+        <div class="card-header bg-success text-white">
+          <h3 class="mb-0">Receive Money</h3>
+        </div>
+        <div class="card-body p-4 text-center">
+          <!-- Large Amount Display -->
+          <div class="mb-4">
+            <label class="form-label h5">Amount to Receive</label>
+            <div class="input-group input-group-lg mb-3">
+              <span class="input-group-text"><i class="bi bi-wallet2"></i></span>
+              <input
+                type="number"
+                class="form-control text-center fs-2"
+                placeholder="0.00"
+                [(ngModel)]="amount"
+              />
+            </div>
+          </div>
+
+          <!-- Shareable Link -->
+          <div class="mb-4">
+            <p class="text-muted">Share this link to receive money:</p>
+            <div class="input-group mb-3">
+              <input
+                type="text"
+                class="form-control"
+                [value]="shareableLink"
+                readonly
+              />
+              <button class="btn btn-outline-secondary" (click)="copyLink()">
+                Copy
+              </button>
+            </div>
+          </div>
+
+          <!-- Share Button -->
+      
+        <ng-template #qrTemplate>
+          <qr-code [value]="shareableLink" 
+                 size="300" 
+                 errorCorrectionLevel="M" />
+        </ng-template>
+          <div class="d-grid gap-2">
+            <button class="btn btn-primary btn-lg" (click)="openModal()">
+              <i class="bi bi-qr-code-scan me-2"></i> Show QR Code
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+
+</div>
+

client/src/app/screens/screen-request/screen-request.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ScreenRequest } from './screen-request';
+
+describe('ScreenReceive', () => {
+  let component: ScreenRequest;
+  let fixture: ComponentFixture<ScreenRequest>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ScreenRequest],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ScreenRequest);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

client/src/app/screens/screen-request/screen-request.ts

@@ -0,0 +1,33 @@
+import { Component, inject, TemplateRef, ViewChild } from '@angular/core';
+import { FormsModule } from '@angular/forms';
+import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
+import { QrCodeComponent } from 'ng-qrcode';
+import { APIService } from '../../services/api';
+import { Modal } from '../../components/modal/modal';
+
+@Component({
+  selector: 'app-screen-request',
+  imports: [FormsModule, QrCodeComponent],
+  templateUrl: './screen-request.html',
+  styleUrl: './screen-request.less',
+})
+export class ScreenRequest {
+  private modalService = inject(NgbModal);
+  api = inject(APIService);
+  @ViewChild('qrTemplate') qrTemplate !: TemplateRef<any>;
+
+  amount: number = 0;
+  get shareableLink(): string {
+    const currentDomain = window.location.origin;
+    return `${currentDomain}/send/${this.api.currentUser.id}?amount=${this.amount}`;
+  }
+
+  copyLink() {
+    navigator.clipboard.writeText(this.shareableLink);
+  }
+  openModal() {
+    const modalRef = this.modalService.open(Modal);
+    modalRef.componentInstance.title = `Pay ${this.amount} to ${this.api.currentUser.id}`
+    modalRef.componentInstance.body = this.qrTemplate;
+  }
+}

client/src/app/screens/screen-send/screen-send.html

@@ -0,0 +1,62 @@
+<div class="container py-5">
+  <div class="row justify-content-center">
+    <div class="col-lg-6 col-md-8">
+      <div class="card shadow-sm">
+        <div class="card-header bg-primary text-white">
+          <h3 class="mb-0">Send Money</h3>
+        </div>
+        <div class="card-body p-4">
+          <!-- Amount Input (Centered Large Field) -->
+          <div class="text-center mb-4">
+            <label class="form-label h5">Amount</label>
+            <div class="input-group input-group-lg mb-3">
+              <span class="input-group-text"><i class="bi bi-wallet2"></i></span>
+              <input
+                type="number"
+                class="form-control text-center fs-2"
+                placeholder="0.00"
+                [(ngModel)]="amount"
+              />
+            </div>
+          </div>
+
+          <!-- Recipient Field -->
+          <div class="mb-3">
+            <label class="form-label">To</label>
+            <div class="input-group">
+              <span class="input-group-text">@</span>
+              <input
+                type="text"
+                class="form-control"
+                placeholder="username"
+                [(ngModel)]="recipient"
+              />
+              <button (click)="openScanner()" class="btn btn-primary"><i class="bi bi-qr-code-scan"></i></button>
+            </div>
+          </div>
+
+          <!-- Note Field -->
+          <div class="mb-4">
+            <label class="form-label">Note (Optional)</label>
+            <textarea class="form-control" rows="2" [(ngModel)]="reference"></textarea>
+          </div>
+
+          <!-- Action Buttons -->
+          <div class="d-grid gap-2">
+            <button class="btn btn-primary btn-lg" (click)="sendMoney()">
+              Send Money
+            </button>
+            <button class="btn btn-outline-secondary btn-lg" (click)="clear()">
+              Cancel
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+
+<ng-template #qrScanner>
+  Abc
+</ng-template>
+

client/src/app/screens/screen-send/screen-send.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ScreenSend } from './screen-send';
+
+describe('ScreenSend', () => {
+  let component: ScreenSend;
+  let fixture: ComponentFixture<ScreenSend>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ScreenSend],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ScreenSend);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

client/src/app/screens/screen-send/screen-send.ts

@@ -0,0 +1,59 @@
+import { Component, OnInit, TemplateRef, ViewChild } from '@angular/core';
+import { FormsModule } from '@angular/forms';
+import { APIService } from '../../services/api';
+import { NotificationService } from '../../services/notification';
+import  QrScanner from 'qr-scanner';
+import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
+import { Modal } from '../../components/modal/modal';
+
+@Component({
+  selector: 'app-screen-send',
+  imports: [FormsModule],
+  templateUrl: './screen-send.html',
+  styleUrl: './screen-send.less',
+})
+export class ScreenSend {
+  amount: number = 0;
+  recipient: string = '';
+  reference: string = '';
+  scanner!: QrScanner;
+  @ViewChild('qrScanner') templScanner!: TemplateRef<any>;
+
+  constructor(
+    private api: APIService,
+    private notify: NotificationService,
+    private modalService: NgbModal,
+  ){}
+
+  sendMoney() {
+    this.api.send(this.amount, this.recipient, this.reference).subscribe({
+      next:()=> {
+        this.notify.success(`Sent ${this.amount} to ${this.recipient}`);
+        this.clear()
+      },
+      error:(err)=> {
+        if(err.status == 404){
+          this.notify.error(`Invalid recipient "${this.recipient}"`);
+        }
+        else if(err.status == 402){
+          this.notify.error(`Insufficient funds.`);
+        }
+        else{
+          this.notify.error(`An error occurred during payment: ${err.status}`);
+        }
+      }
+    });
+  }
+
+  clear() {
+    this.amount = 0;
+    this.recipient = '';
+    this.reference = '';
+  }
+  openScanner(){
+    const modalRef = this.modalService.open(Modal);
+    modalRef.componentInstance.title = 'Scan a QR Code';
+    modalRef.componentInstance.body = this.templScanner;
+  }
+  closeScanner(){}
+}

client/src/app/services/api.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { APIService } from './api';
+
+describe('Api', () => {
+  let service: APIService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(APIService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

client/src/app/services/api.ts

@@ -0,0 +1,66 @@
+import { HttpClient } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+import { BehaviorSubject, catchError, map, Observable, of, tap } from 'rxjs';
+import Transaction from '@model/transaction'
+import { SendRequest, SendResponse } from '@message/Send';
+import { LoginResponse } from '@message/Login';
+import Account from '@model/user';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class APIService {
+  private apiUrl = '/api';
+  private isAuthenticatedSubject = new BehaviorSubject<boolean>(false);
+  isAuthenticated$ = this.isAuthenticatedSubject.asObservable();
+  
+  // data holding
+  loggedInUser!: Account;
+  currentUser!: Account;
+  ownedAccounts!: Account[];
+
+  constructor(private http: HttpClient){}
+
+  login(username: string, password: string): Observable<any>{
+    return this.http.post<LoginResponse>(`${this.apiUrl}/auth/login`,{ 'username': username, 'password': password}).pipe(
+      tap({
+        next: (resp) => {
+          this.isAuthenticatedSubject.next(true);
+          this.loggedInUser = resp.user;
+          this.currentUser = this.loggedInUser;
+          this.ownedAccounts = resp.ownedAccounts;
+          this.ownedAccounts.push(this.loggedInUser);
+        },
+        error: () => this.isAuthenticatedSubject.next(false)
+      })
+    );
+  }
+  logout(): Observable<any>{
+    return this.http.post(`${this.apiUrl}/auth/logout`, {}).pipe(
+    tap({
+      next: () => this.isAuthenticatedSubject.next(false),
+      error: () => this.isAuthenticatedSubject.next(false),
+    })
+  );
+  }
+  clearAuthState() {
+    this.isAuthenticatedSubject.next(false);
+  }
+  checkAuthStatus(): Observable<boolean> {
+    return this.http.get(`${this.apiUrl}/auth/status`).pipe(
+      map(() => true),
+      catchError(() => of(false)),
+      tap( authenticated => {
+        this.isAuthenticatedSubject.next(authenticated);
+      })
+    );
+  }
+  getTransactions(): Observable<Transaction[]>{
+    return this.http.get<Transaction[]>(`${this.apiUrl}/transactions`);
+  }
+  send(amount: number, recipientID: string, reference: string = ""): Observable<SendResponse>{
+    
+    let request: SendRequest = {senderID: this.currentUser.id, amount,  recipientID, reference};
+    return this.http.post<SendResponse>(`${this.apiUrl}/send`, request);
+  }
+}

client/src/app/services/auth-guard.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed } from '@angular/core/testing';
+import { CanActivateFn } from '@angular/router';
+
+import { authGuard } from './auth-guard';
+
+describe('authGuard', () => {
+  const executeGuard: CanActivateFn = (...guardParameters) =>
+    TestBed.runInInjectionContext(() => authGuard(...guardParameters));
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+  });
+
+  it('should be created', () => {
+    expect(executeGuard).toBeTruthy();
+  });
+});

client/src/app/services/auth-guard.ts

@@ -0,0 +1,21 @@
+import { inject } from '@angular/core';
+import { CanActivateFn, Router } from '@angular/router';
+import { APIService } from './api';
+import { map, take } from 'rxjs/operators';
+
+export const authGuard: CanActivateFn = (route, state) => {
+  const api = inject(APIService);
+  const router = inject(Router);
+
+  return api.isAuthenticated$.pipe(
+    take(1),
+    map((isAuthenticated) => {
+      if (isAuthenticated) {
+        return true;
+      } else {
+        router.navigate(['/login'], { queryParams: { returnUrl: state.url } });
+        return false;
+      }
+    })
+  );
+};

client/src/app/services/auth-interceptor.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed } from '@angular/core/testing';
+import { HttpInterceptorFn } from '@angular/common/http';
+
+import { authInterceptor } from './auth-interceptor';
+
+describe('authInterceptor', () => {
+  const interceptor: HttpInterceptorFn = (req, next) =>
+    TestBed.runInInjectionContext(() => authInterceptor(req, next));
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+  });
+
+  it('should be created', () => {
+    expect(interceptor).toBeTruthy();
+  });
+});

client/src/app/services/auth-interceptor.ts

@@ -0,0 +1,19 @@
+import { HttpErrorResponse, HttpEventType, HttpInterceptorFn } from '@angular/common/http';
+import { catchError, throwError } from 'rxjs';
+import { APIService } from './api';
+import { inject } from '@angular/core';
+import { Router } from '@angular/router';
+
+export const authInterceptor: HttpInterceptorFn = (req, next) => {
+  const api = inject(APIService);
+  const router = inject(Router)
+  return next(req).pipe(
+    catchError((err: HttpErrorResponse) => {
+      if (err.status === 401){
+        api.clearAuthState();
+        router.createUrlTree(['/login']);
+      }
+      return throwError(() => err);
+    })
+  )
+};

client/src/app/services/data.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { DataService } from './data';
+
+describe('Data', () => {
+  let service: DataService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(DataService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

client/src/app/services/data.ts

@@ -0,0 +1,6 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class DataService {}

client/src/app/services/notification.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { NotificationService } from './notification';
+
+describe('Notification', () => {
+  let service: NotificationService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(NotificationService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

client/src/app/services/notification.ts

@@ -0,0 +1,41 @@
+import { Injectable, signal } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class NotificationService {
+  notifications = signal<Notification[]>([]);
+
+  show(notification: Notification) {
+    this.notifications.update(items => [
+      ...items,
+      notification,
+    ]);
+  }
+
+  remove(notification: Notification) {
+    this.notifications.update(items =>
+      items.filter(item => item !== notification)
+    );
+  }
+
+  success(message: string) {
+    this.show({ type: 'success', message});
+  }
+
+  error(message: string) {
+    this.show({ type: 'danger', message});
+  }
+
+  warn(message: string) {
+    this.show({ type: 'warning', message});
+  }
+  info(message: string) {
+    this.show({ type: 'info', message});
+  }
+}
+export interface Notification {
+  type: 'success' | 'warning' | 'info' | 'danger';
+  message: string;
+  delay?: number;
+}

client/src/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>Client</title>
+  <base href="/">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="favicon.ico">
+</head>
+<body>
+  <app-root></app-root>
+</body>
+</html>

client/src/main.ts

@@ -0,0 +1,7 @@
+/// <reference types="@angular/localize" />
+
+import { bootstrapApplication } from '@angular/platform-browser';
+import { appConfig } from './app/app.config';
+import { App } from './app/app';
+
+bootstrapApplication(App, appConfig).catch((err) => console.error(err));

client/src/styles.less

@@ -0,0 +1,67 @@
+:root {
+  --bs-primary: #2f745f;
+  --bs-primary-rgb: 47, 116, 95;
+  --bs-primary-bg-subtle: #9dbbb2;
+  --bs-primary-border-subtle: #9dbbb2;
+  --bs-primary-text-emphasis: #114334;
+  --bs-link-color: #2f745f;
+  --bs-link-color-rgb: 47, 116, 95;
+  --bs-link-hover-color: #114334;
+
+  --bs-success: #114334;
+  --bs-success-rgb: 17, 67, 52;
+  --bs-success-bg-subtle: #9dbbb2;
+  --bs-success-border-subtle: #9dbbb2;
+  --bs-success-text-emphasis: #114334;
+}
+
+.btn-primary {
+  --bs-btn-bg: #2f745f;
+  --bs-btn-border-color: #2f745f;
+  --bs-btn-hover-bg: #114334;
+  --bs-btn-hover-border-color: #114334;
+  --bs-btn-focus-shadow-rgb: 47, 116, 95;
+  --bs-btn-active-bg: #114334;
+  --bs-btn-active-border-color: #114334;
+  --bs-btn-disabled-bg: #2f745f;
+  --bs-btn-disabled-border-color: #2f745f;
+}
+
+.btn-outline-primary {
+  --bs-btn-color: #2f745f;
+  --bs-btn-border-color: #2f745f;
+  --bs-btn-hover-bg: #2f745f;
+  --bs-btn-hover-border-color: #2f745f;
+  --bs-btn-focus-shadow-rgb: 47, 116, 95;
+  --bs-btn-active-bg: #114334;
+  --bs-btn-active-border-color: #114334;
+  --bs-btn-disabled-color: #2f745f;
+  --bs-btn-disabled-bg: transparent;
+  --bs-btn-disabled-border-color: #2f745f;
+}
+
+.btn-success {
+  --bs-btn-bg: #114334;
+  --bs-btn-border-color: #114334;
+  --bs-btn-hover-bg: #0e392c;
+  --bs-btn-hover-border-color: #0e392c;
+  --bs-btn-focus-shadow-rgb: 17, 67, 52;
+  --bs-btn-active-bg: #0e392c;
+  --bs-btn-active-border-color: #0e392c;
+  --bs-btn-disabled-bg: #114334;
+  --bs-btn-disabled-border-color: #114334;
+}
+
+.nav-pills .nav-link.active {
+  --bs-nav-pills-link-active-bg: #2f745f;
+}
+
+.dropdown-menu {
+  --bs-dropdown-link-active-bg: #2f745f;
+}
+
+.form-control:focus,
+.form-select:focus {
+  border-color: #9dbbb2;
+  box-shadow: 0 0 0 0.25rem rgba(47, 116, 95, 0.25);
+}

client/tsconfig.app.json

@@ -0,0 +1,11 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../dist/out-tsc/client",
+    "types": ["@angular/localize"]
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["src/**/*.spec.ts"]
+}

client/tsconfig.json

@@ -0,0 +1,31 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "../tsconfig.json",
+  "compileOnSave": false,
+  "compilerOptions": {
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "experimentalDecorators": true,
+    "skipLibCheck": true,
+    "importHelpers": true,
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}

client/tsconfig.spec.json

@@ -0,0 +1,10 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../dist/out-tsc/spec",
+    "types": ["vitest/globals", "@angular/localize"]
+  },
+  "include": ["src/**/*.d.ts", "src/**/*.spec.ts"]
+}

docs/design/use-cases.md

@@ -0,0 +1,19 @@
+# Use Cases
+
+## Pay someone
+The client pays a business or peer by scanning their QR code or clicking their URL.
+They are then shown the payment (send) screen that already contains the prefilled recipient and currency amount.
+The client then confirms payment with a button and optional confirmation dialog.
+
+## Request payment
+The business requests payment from a client by sharing their URL / QR code.
+The client proceeds with the `Pay someone` flow.
+
+## 
+
+## Visitor
+Visitors obtain access by receiving credentials of a predefined visitor account.
+Upon login, they participate freely in the payment process as described by `Pay someone` and `Request payment`.
+
+## Onboarding users
+An administrator performs onboarding using a batch import feature that makes use of `.csv` or a similarly simple format.

package.json

@@ -5,13 +5,22 @@
   "license": "GPL-3.0",
   "author": "",
   "type": "commonjs",
-  "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "server": "npm run dev --workspace=server",
+    "client": "npm start --prefix client",
+    "dev": "concurrently \"npm run server\" \"npm run client\"",
+    "teardown": "npm run teardown --workspace=server"
   },
   "workspaces": [
     "client",
-    "server",
+    "server"
-    "shared"
+  ],
-  ]
+  "devDependencies": {
+    "@types/node": "^25.3.2",
+    "concurrently": "^9.2.1",
+    "nodemon": "^3.1.14",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.9.3"
+  }
 }

server/.env.example

@@ -0,0 +1,7 @@
+FM_PRIVATE_KEY='{"kty":"oct","k":"WoX65SSouJ4c8l_OxwWspo9H5dhPBq9sW0lsOJB6Ygc"}'
+NODE_ENV='dev'
+FM_DB_HOST
+FM_DB_PORT
+FM_DB_NAME
+FM_DB_USER
+FM_DB_PASSWORD

server/compose.yml

@@ -0,0 +1,19 @@
+services:
+  postgres:
+    image: postgres
+    environment:
+      POSTGRES_PASSWORD: pass
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./.docker:/var/lib/postgresql
+
+  adminer:
+    image: adminer
+    restart: always
+    environment:
+      ADMINER_DEFAULT_SERVER: postgres
+    ports:
+      - "8080:8080"
+    depends_on:
+      - postgres

server/nodemon.json

@@ -0,0 +1,6 @@
+{
+  "watch": ["src"],
+  "ext": "ts,json",
+  "exec": "ts-node src/index.ts"
+}
+

server/package.json

@@ -5,9 +5,48 @@
   "license": "GPL-3.0",
   "author": "",
   "type": "commonjs",
-  "main": "index.js",
+  "main": "../dist/out-tsc/server/index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "node": "nodemon",
+    "start": "ts-node src/index.ts",
+    "build": "tsc",
+    "serve": "node ../dist/out-tsc/server/index.js",
+    "setup": "docker compose up -d",
+    "teardown": "docker compose down",
+    "keygen": "ts-node src/scripts/keygen.ts",
+    "hash": "ts-node src/scripts/hash.ts",
+    "verify-hash": "ts-node src/scripts/verify-hash.ts",
+    "create-user": "ts-node src/scripts/create-user.ts",
+    "dev": "npm run setup && npm run node; npm run teardown"
   },
-  "devDependencies": {}
+  "dependencies": {
+    "bcrypt": "^6.0.0",
+    "cookie-parser": "^1.4.7",
+    "cors": "^2.8.6",
+    "dotenv": "^17.3.1",
+    "express": "^5.2.1",
+    "jose": "^6.2.0",
+    "pg": "^8.20.0",
+    "pg-hstore": "^2.3.4",
+    "reflect-metadata": "^0.2.2",
+    "sequelize": "^6.37.7",
+    "sequelize-typescript": "^2.1.6",
+    "winston": "^3.19.0"
+  },
+  "devDependencies": {
+    "@types/bcrypt": "^6.0.0",
+    "@types/cookie-parser": "^1.4.10",
+    "@types/cors": "^2.8.19",
+    "@types/express": "^5.0.6",
+    "@types/node": "^25.3.5",
+    "@types/pg": "^8.16.0",
+    "@types/validator": "^13.15.10",
+    "concurrently": "^9.2.1",
+    "eslint": "^10.0.2",
+    "nodemon": "^3.1.14",
+    "prettier": "^3.8.1",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.9.3"
+  }
 }

server/src/index.ts

@@ -0,0 +1,43 @@
+import express, { Express, Request, Response } from "express";
+import cors from "cors";
+import cookieParser from "cookie-parser";
+import transactionsRouter from './routes/transactions';
+import authRouter from './routes/auth';
+import sendRouter from './routes/send';
+import dotenv from 'dotenv';
+dotenv.config({quiet: true});
+import { db, testConnection } from "./util/db";
+import { logger } from "./util/logging";
+import { setKeyFromEnv } from "./util/auth";
+
+const app: Express = express();
+app.use(cors());
+app.use(cookieParser());
+app.use(express.json());
+
+app.get("/api/health", (req: Request, res: Response) => {
+  res.json({ status: "OK" });
+});
+
+app.use('/api/auth', authRouter);
+app.use('/api/transactions', transactionsRouter);
+app.use('/api/send', sendRouter);
+
+const PORT: number = parseInt(process.env.FM_PORT as string) || 3000;
+
+async function startServer() {
+  await testConnection();
+
+  // Sync models (use migrations in production!)
+  // Use { force: true } to drop and recreate tables (development only!)
+  await db.sync({ alter: true });
+  await setKeyFromEnv();
+
+  app.listen(PORT, () => {
+    logger.info(`🚀 Backend Server running on http://localhost:${PORT}`);
+  });
+}
+startServer().catch((err) => {
+  logger.error('Failed to start server:', err);
+  process.exit(1);
+});

server/src/messages/Login.ts

@@ -0,0 +1,13 @@
+import Account from "../model/user";
+export class LoginRequest{
+    constructor(
+        public username: string,
+        public password: string
+    ){}
+}
+export class LoginResponse{
+    constructor(
+        public user: Account,
+        public ownedAccounts: Account[],
+    ){}
+}

server/src/messages/Message.ts

@@ -0,0 +1,5 @@
+export class GenericMessage{
+    constructor(
+        public message: string
+    ){}
+}

server/src/messages/Send.ts

@@ -0,0 +1,14 @@
+export class SendRequest{
+    constructor(
+        public senderID: string,
+        public recipientID: string,
+        public amount: number,
+        public reference: string
+    ){}
+}
+
+export class SendResponse{
+    constructor(
+        public balance: number,
+    ){}
+}

server/src/messages/Transactions.ts

@@ -0,0 +1,15 @@
+import Transaction from "../model/transaction";
+
+export class TransactionsRequest{
+    constructor(
+        public forId: string,
+        public offset = 0,
+        public count = 50,
+    ){}
+}
+
+export class TransactionsResponse{
+    constructor(
+        public transactions: Transaction[],
+    ){}
+}

server/src/messages/User.ts

@@ -0,0 +1,11 @@
+import Account from "../model/user";
+
+export class UserRequest{
+    constructor(
+    ){}
+}
+export class UserResponse{
+    constructor(
+        public user: Account
+    ){}
+}

server/src/model/transaction.ts

@@ -0,0 +1,28 @@
+import { Table, Column, Model, CreatedAt, ForeignKey, BelongsTo} from 'sequelize-typescript';
+import Account from './user';
+
+@Table
+export default class Transaction extends Model{
+    @Column
+    declare amount: number;
+    
+    @Column
+    declare reference: string;
+
+    @Column
+    @ForeignKey(()=> Account)
+    declare senderID: string;
+
+    @BelongsTo(() => Account, 'senderID')
+    declare sender: Account;
+
+    @Column
+    @ForeignKey(()=> Account)
+    declare receiverID: string;
+
+    @BelongsTo(() => Account, 'receiverID')
+    declare receiver: Account;
+
+    @CreatedAt
+    declare date: Date;
+}

server/src/model/user.ts

@@ -0,0 +1,65 @@
+import { Table, Column, Model, DataType, Scopes, DefaultScope, DeletedAt, BelongsToMany, ForeignKey} from 'sequelize-typescript';
+
+@Table
+@DefaultScope(() => ({
+  attributes:{ exclude: ['password']}
+}))
+@Scopes(() => ({
+  withPassword: {
+    attributes: {include: ['password']}
+  }
+}))
+export default class Account extends Model{
+
+  @Column({primaryKey: true, unique: true, allowNull: false})
+  declare id: string;
+
+  @Column
+  declare isBusiness: boolean;
+
+  @Column
+  declare displayName: string;
+
+  @Column(DataType.DECIMAL(20,2))
+  declare balance: number;
+
+  @Column
+  declare password: string;
+  
+  @DeletedAt
+  declare deletedAt: Date | null;
+  
+  @BelongsToMany(() => Account, () => BusinessOwnership, 'ownerAccountId', 'ownedAccountId')
+  declare ownedBusinesses: Account[];
+
+  @BelongsToMany(() => Account, () => BusinessOwnership, 'ownedAccountId', 'ownerAccountId')
+  declare owners: Account[];
+  
+  override toJSON() {
+    const values = { ...this.get() };
+    delete values.password;
+    return values;
+  }
+}
+
+@Table
+export class BusinessOwnership extends Model {
+  @ForeignKey(() => Account)
+  @Column
+  declare ownerAccountId: string;
+
+  @ForeignKey(() => Account)
+  @Column
+  declare ownedAccountId: string;
+
+  @DeletedAt
+  declare deletedAt: Date | null;
+}
+
+export async function getOwnedAccounts(user: Account){
+    let q = await Account.findByPk(user.id, {
+      include: ['ownedBusinesses'],
+    });
+    let ownedAccounts = q?.ownedBusinesses;
+    return ownedAccounts ?? [];
+}

server/src/routes/auth.ts

@@ -0,0 +1,44 @@
+import { compare } from 'bcrypt';
+import express from 'express';
+import { logger } from '../util/logging';
+import Account, { getOwnedAccounts } from '../model/user';
+import { Scope } from '../util/db';
+import { getJWT, requireAuth } from '../util/auth';
+import { LoginRequest, LoginResponse } from '../messages/Login';
+import { GenericMessage as Msg } from '../messages/Message';
+
+const router = express.Router();
+
+router.post('/login', async (req, res) => {
+  try {
+    const data : LoginRequest = req.body;
+    const user = await Account.scope(Scope.withPassword).findOne({where: { id: data.username}});
+    if (!user) return res.status(401).json(new Msg('Invalid credentials'));
+    const isMatch = await compare(data.password, user.password);
+    if (!isMatch) return res.status(401).json(new Msg('Invalid credentials'));
+
+    // successfully authenticated
+    let jwt = await getJWT(user);
+    res.cookie('jwt', jwt, {
+      httpOnly: true, // Prevent XSS
+      secure: process.env.NODE_ENV === 'production', // HTTPS only
+      sameSite: 'strict', // CSRF protection
+      maxAge: 86400000,  // 1 day
+    });
+    res.json(new LoginResponse(user, await getOwnedAccounts(user)));
+  }catch (err) {
+    logger.error('Failed to authenticate:', err);
+    res.status(500).json(new Msg('Failed to authenticate'));
+  }
+});
+
+router.post('/logout', (req, res) => {
+  res.clearCookie('jwt');
+  res.json({ message: 'Logged out successfully' });
+});
+
+router.get('/status',requireAuth , async (req, res) => {
+    return res.status(200).json({authenticated: true});
+})
+
+export default router;

server/src/routes/send.ts

@@ -0,0 +1,56 @@
+import express  from 'express';
+import { logger } from '../util/logging';
+import { requireAuth } from '../util/auth';
+import Account, { BusinessOwnership, getOwnedAccounts } from '../model/user';
+import { db } from '../util/db';
+import Transaction from '../model/transaction';
+import { SendRequest, SendResponse} from '../messages/Send';
+import { GenericMessage as Err} from '../messages/Message';
+
+
+const router = express.Router();
+
+router.post('/', requireAuth, async (req, res) => {
+  try {
+    const user = res.locals.user as Account;
+    const data : SendRequest = req.body;
+    if ( Number(data.amount) <= 0) {
+      return res.status(400).json(new Err('Invalid transfer amount'));
+    }
+    const recipient = await Account.findOne({where: {id: data.recipientID}})
+    if (!recipient) {
+      return res.status(404).json(new Err('Recipient not found' ));
+    }
+    const sender = await Account.findOne({where: {id: data.senderID}})
+    if (!sender) {
+      return res.status(404).json(new Err('Sender not found' ));
+    }
+    let ownsAccount = (await getOwnedAccounts(user))?.some(
+      business => business.id == data.senderID
+    );
+    if(!(user.equals(sender) || ownsAccount )){
+      return res.status(403).json(new Err('Unauthorized sender'));
+    }
+    if (Number(sender.balance) < Number(data.amount)){
+      logger.debug(`Insufficient balance: ${sender.balance} < ${data.amount}`)
+      return res.status(402).json(new Err('Insufficient balance'))
+    }
+
+    await db.transaction(async (t) =>{
+      await sender.decrement({balance: data.amount});
+      await recipient.increment({balance: data.amount});
+      await Transaction.create({
+        amount: data.amount,
+        senderID: sender.id,
+        receiverID: recipient.id,
+        reference: data.reference
+      });
+    })
+    return res.status(200).json(new SendResponse(sender.balance))
+  } catch (err) {
+    logger.error('Failed to commit transaction:', err);
+    return res.status(500).json(new Err('Failed to commit transaction' ));
+  }
+});
+
+export default router;

server/src/routes/transactions.ts

@@ -0,0 +1,21 @@
+import express from 'express';
+import { logger } from '../util/logging';
+import Transaction from '../model/transaction';
+import { requireAuth } from '../util/auth';
+
+const router = express.Router();
+
+router.get('/', requireAuth, async (req, res) => {
+  try {
+    const transactions = await Transaction.findAll({
+      limit: 100,
+      order: [['date', 'DESC']]
+     });
+    res.json(transactions);
+  } catch (err) {
+    logger.error('Failed to fetch transactions:', err);
+    res.status(500).json({ error: 'Failed to fetch transactions' });
+  }
+});
+
+export default router;

server/src/scripts/create-user.ts

@@ -0,0 +1,12 @@
+import { db, testConnection } from "../util/db";
+import { hash } from "bcrypt";
+import Account  from '../model/user';
+(async () =>{
+    await testConnection();
+    await Account.create({
+        id: process.argv[2],
+        displayName: process.argv[3],
+        balance: process.argv[4],
+        password: await hash(process.argv[5], 10),
+    })
+})();

server/src/scripts/hash.ts

@@ -0,0 +1,5 @@
+import {hash} from  'bcrypt';
+let pass = process.argv[2];
+hash(pass, 10, function(err, hash) {
+    console.log(hash);
+});

server/src/scripts/keygen.ts

@@ -0,0 +1,11 @@
+import { exportJWK, generateSecret } from "jose"
+
+async function printSecret(secret){
+    const jwk = await exportJWK(secret);
+    console.log('🔑Generated Secret:');
+    console.log(JSON.stringify(jwk));
+}
+(async () => {
+    const secret = await generateSecret('HS256', {extractable: true});
+    await printSecret(secret);
+})();

server/src/scripts/verify-hash.ts

@@ -0,0 +1,6 @@
+import {compare} from  'bcrypt';
+let pass = process.argv[2];
+let hash = process.argv[3];
+compare(pass,hash, function(err, result){
+    console.log(result);
+});

server/src/util/auth.ts

@@ -0,0 +1,53 @@
+import { NextFunction, Request, Response } from "express";
+import Account from "../model/user"
+import { importJWK, SignJWT, jwtVerify } from "jose";
+
+
+let key;
+
+async function setKeyFromEnv() {
+    key = await importJWK(JSON.parse(process.env.FM_PRIVATE_KEY));
+}
+
+async function getJWT(user: Account){
+    let jwt = await new SignJWT()
+        .setSubject(user.id)
+        .setProtectedHeader({ alg: 'HS256' })
+        .setIssuedAt()
+        .sign(key);
+
+    return jwt
+}
+
+async function requireAuth(req: Request, res: Response, next: NextFunction) {
+  try {
+    const token = req.cookies.jwt; // Or req.headers.authorization
+    if (!token) {
+      return res.status(401).json({ error: 'Unauthorized: No token provided' });
+    }
+    const jwt= await jwtVerify(token, key);
+    const user = await Account.findOne({where: { id: jwt.payload.sub}});
+    if (!user) {
+      return res.status(401).json({ error: 'Unauthorized: User not found' });
+    }
+    //TODO extend req instead of using res.locals
+    res.locals.user = user;
+    next();
+  } catch (err) {
+    return res.status(401).json({ error: 'Unauthorized: Invalid token' });
+  }
+}
+
+function requireRole(role: string) {
+  return async (req: Request, res: Response, next: NextFunction) => {
+    // First, run requireAuth to ensure the user is authenticated
+    await requireAuth(req, res, () => {
+      if (res.locals.role !== role) {
+        return res.status(403).json({ error: 'Forbidden: Insufficient permissions' });
+      }
+      next(); // User is authenticated and has the required role
+    });
+  };
+}
+
+export {getJWT, setKeyFromEnv, requireAuth}

server/src/util/db.ts

@@ -0,0 +1,36 @@
+import { Sequelize } from 'sequelize-typescript';
+import { logger } from './logging';
+import Account, { BusinessOwnership } from '../model/user';
+import Transaction from '../model/transaction';
+
+enum Scope{
+  // for User
+  withPassword = 'withPassword',
+}
+
+// Initialize Sequelize
+const db = new Sequelize({
+  dialect: 'postgres',
+  host: process.env.FM_DB_HOST || 'localhost',
+  port: parseInt(process.env.FM_DB_PORT || '5432'),
+  database: process.env.FM_DB_NAME || 'postgres',
+  username: process.env.FM_DB_USER || 'postgres',
+  password: process.env.FM_DB_PASSWORD || 'pass',
+  logging: logger.debug.bind(logger),
+});
+
+db.addModels([Account, BusinessOwnership, Transaction ])
+
+// Test the connection
+async function testConnection() {
+  try {
+    await db.authenticate();
+    logger.info('✅ Database connection established.');
+  } catch (err) {
+    logger.error('❌ Unable to connect to the database:', err);
+    process.exit(1); // Exit if DB connection fails
+  }
+}
+
+// Export Sequelize instance and models
+export { logger, db, testConnection, Scope };

server/src/util/logging.ts

@@ -0,0 +1,17 @@
+import winston, { format } from "winston";
+const logger = winston.createLogger({
+  level:'info',
+})
+if (process.env.NODE_ENV !== 'production') {
+  logger.add(new winston.transports.Console({
+    format: format.combine(
+      format.colorize({all: true}),
+      format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
+      format.printf((info) => `${info.timestamp} [${info.level}]: ${info.message}`),
+    )
+
+}));
+}
+
+// Export Sequelize instance and models
+export { logger };

server/tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../dist/out-tsc/server",
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "allowSyntheticDefaultImports": true,
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "module": "nodenext",
+    "moduleResolution": "nodenext"
+
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules"]
+}
+

shared/package.json

@@ -1,13 +0,0 @@
-{
-  "name": "shared",
-  "version": "1.0.0",
-  "description": "",
-  "license": "GPL-3.0",
-  "author": "",
-  "type": "commonjs",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "devDependencies": {}
-}

tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "baseUrl": "./",
+    "outDir": "./dist/out-tsc",
+    "sourceMap": true,
+    "declaration": false,
+    "moduleResolution": "bundler",
+    "target": "ES2022",
+    "module": "es2022",
+    "lib": ["es2022", "dom"],
+    "paths": {
+      "@model/*": ["server/src/model/*"],
+      "@message/*": ["server/src/messages/*"],
+    }
+  },
+  "exclude": ["node_modules"]
+}