show first entry

frontend/src/app/app.component.html

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+<header
+  class="flex flex-row justify-between items-center px-5 bg-gray-300 h-16 w-full drop-shadow-xl/5"
+>
+  <a routerLink="/">
+    <h1 class="text-2xl">My Blog</h1>
+  </a>
+  <nav></nav>
+</header>
+<main class="w-screen h-full px-5 sm:px-20 xl:px-96 pt-5">
+  <router-outlet />
+</main>

frontend/src/app/app.component.spec.ts

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+import { TestBed } from '@angular/core/testing';
+import { AppComponent } from './app.component';
+
+describe('AppComponent', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [AppComponent],
+    }).compileComponents();
+  });
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it(`should have the 'frontend' title`, () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.componentInstance;
+    expect(app.title).toEqual('frontend');
+  });
+
+  it('should render title', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    fixture.detectChanges();
+    const compiled = fixture.nativeElement as HTMLElement;
+    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, frontend');
+  });
+});

frontend/src/app/app.component.ts

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+import { Component } from '@angular/core';
+import { RouterLink, RouterOutlet } from '@angular/router';
+
+@Component({
+  selector: 'app-root',
+  imports: [RouterOutlet, RouterLink],
+  templateUrl: './app.component.html',
+})
+export class AppComponent {
+  title = 'frontend';
+}

frontend/src/app/app.config.ts

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+import { ApplicationConfig, provideZoneChangeDetection } from '@angular/core';
+import { provideRouter, withComponentInputBinding } from '@angular/router';
+
+import { routes } from './app.routes';
+import { provideHttpClient } from '@angular/common/http';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideZoneChangeDetection({ eventCoalescing: true }),
+    provideRouter(routes, withComponentInputBinding()),
+    provideHttpClient(),
+  ],
+};

frontend/src/app/app.routes.ts

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+import { Routes } from '@angular/router';
+import { HomeComponent } from './routes/home/home.component';
+import { PostComponent } from './routes/post/post.component';
+
+export const routes: Routes = [
+  { path: '', component: HomeComponent },
+  { path: 'post', children: [{ path: ':id', component: PostComponent }] },
+];

frontend/src/app/components/markdown/markdown.component.html

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+<div [innerHTML]="innerHTML"></div>

frontend/src/app/components/markdown/markdown.component.spec.ts

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

frontend/src/app/components/markdown/markdown.component.ts

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+import { Component, Input, OnChanges, OnInit } from '@angular/core';
+import DOMPurify from 'dompurify';
+import { marked } from 'marked';
+
+@Component({
+  selector: 'app-markdown',
+  imports: [],
+  standalone: true,
+  templateUrl: './markdown.component.html',
+})
+export class MarkdownComponent implements OnChanges {
+  @Input() markdown: string = '';
+  innerHTML: string = '';
+
+  async parseMD() {
+    this.innerHTML = DOMPurify.sanitize(await marked.parse(this.markdown));
+  }
+
+  ngOnChanges(): void {
+    this.parseMD();
+  }
+}

frontend/src/app/routes/home/home.component.html

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+<p>Welcome to by little blog:</p>
+<section class="grid gap-5 sm:grid-cols-2 2xl:grid-cols-3">
+  <button
+    *ngFor="let post of posts()"
+    class="p-5 flex flex-col items-start rounded-s bg-white drop-shadow-md hover:drop-shadow-xl"
+    [routerLink]="`/post/${post.id}`"
+  >
+    <h2 class="text-xl">{{ post.title }}</h2>
+    <p><strong>TL;DR; </strong>{{ post.tldr }}</p>
+  </button>
+</section>

frontend/src/app/routes/home/home.component.spec.ts

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

frontend/src/app/routes/home/home.component.ts

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+import { Component, inject, OnInit, Signal } from '@angular/core';
+import { PostsService } from '../../shared/services/posts.service';
+import { NgForOf } from '@angular/common';
+import { RouterLink } from '@angular/router';
+import { Post } from '../../shared/services/interfaces/post';
+
+@Component({
+  selector: 'app-home',
+  imports: [NgForOf, RouterLink],
+  standalone: true,
+  templateUrl: './home.component.html',
+})
+export class HomeComponent {
+  private postsService = inject(PostsService);
+
+  get posts() {
+    return this.postsService.getPosts();
+  }
+}

frontend/src/app/routes/post/post.component.html

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+<h2 class="text-3xl">{{ post()?.title }}</h2>
+<p class="mb-5 italic text-sm">TL;DR; {{ post()?.tldr }}</p>
+
+<app-markdown
+  class="todo"
+  [markdown]="post()?.content || 'this post is empty'"
+/>

frontend/src/app/routes/post/post.component.spec.ts

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

frontend/src/app/routes/post/post.component.ts

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+import { Component, inject, Input } from '@angular/core';
+import { PostsService } from '../../shared/services/posts.service';
+import { JsonPipe, NgIf } from '@angular/common';
+import { MarkdownComponent } from '../../components/markdown/markdown.component';
+
+@Component({
+  selector: 'app-post',
+  imports: [MarkdownComponent],
+  standalone: true,
+  templateUrl: './post.component.html',
+})
+export class PostComponent {
+  private posts = inject(PostsService);
+  @Input() id!: string;
+
+  get post() {
+    return this.posts.getPost(parseInt(this.id));
+  }
+}

frontend/src/app/shared/services/interfaces/post.ts

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+export interface Post {
+  id: number;
+  title: string;
+  tldr: string;
+  content: string;
+}
+
+export interface Comment {
+  content: string;
+}

frontend/src/app/shared/services/posts.service.spec.ts

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+import { TestBed } from '@angular/core/testing';
+
+import { PostsService } from './posts.service';
+
+describe('PostsService', () => {
+  let service: PostsService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(PostsService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

frontend/src/app/shared/services/posts.service.ts

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+import { HttpClient } from '@angular/common/http';
+import {
+  computed,
+  inject,
+  Injectable,
+  Signal,
+  signal,
+  WritableSignal,
+} from '@angular/core';
+import { Post } from './interfaces/post';
+import { environment } from '../../../environments/environment';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class PostsService {
+  private http = inject(HttpClient);
+  private posts: WritableSignal<Map<number, Post>> = signal(new Map());
+
+  constructor() {
+    this.updatePosts(); // Pull posts immediately when the service is instantiated
+  }
+
+  updatePosts() {
+    this.http
+      .get<Post[]>(`${environment.apiRoot}/posts`)
+      .subscribe((res) => this.posts.set(new Map(res.map((p) => [p.id, p]))));
+  }
+  getPosts(): Signal<Post[]> {
+    return computed(() => Array.from(this.posts().values()));
+  }
+
+  getPost(id: number): Signal<Post | undefined> {
+    console.log(typeof id);
+    console.log(this.posts().has(id));
+    console.log(this.posts().has(2));
+
+    return computed(() => this.posts().get(id));
+  }
+}