feat(challenge30): interop rxjs signal

apps/interop-rxjs-signal/src/app/app.component.ts

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+import { Component } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+
+@Component({
+  standalone: true,
+  imports: [RouterOutlet],
+  selector: 'app-root',
+  template: `<router-outlet />`,
+  styles: [''],
+})
+export class AppComponent {}

apps/interop-rxjs-signal/src/app/app.config.ts

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+import { provideHttpClient } from '@angular/common/http';
+import { ApplicationConfig } from '@angular/core';
+import { provideAnimations } from '@angular/platform-browser/animations';
+import { provideRouter, withComponentInputBinding } from '@angular/router';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideHttpClient(),
+    provideAnimations(),
+    provideRouter(
+      [
+        {
+          path: '',
+          pathMatch: 'full',
+          loadComponent: () => import('./list/photos.component'),
+        },
+        {
+          path: 'detail',
+          loadComponent: () => import('./detail/detail.component'),
+        },
+        {
+          path: '**',
+          redirectTo: '',
+        },
+      ],
+      withComponentInputBinding()
+    ),
+  ],
+};

apps/interop-rxjs-signal/src/app/detail/detail.component.ts

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+import { DatePipe } from '@angular/common';
+import { Component, Input as RouterInput } from '@angular/core';
+import { RouterLink } from '@angular/router';
+import { Photo } from '../photo.model';
+
+@Component({
+  selector: 'app-photos',
+  standalone: true,
+  imports: [DatePipe, RouterLink],
+  template: `
+    <img src="{{ photo.url_m }}" alt="{{ photo.title }}" class="image" />
+    <p><span class="font-bold">Title:</span> {{ photo.title }}</p>
+    <p><span class="font-bold">Owner:</span> {{ photo.ownername }}</p>
+    <p><span class="font-bold">Date:</span> {{ photo.datetaken | date }}</p>
+    <p><span class="font-bold">Tags:</span> {{ photo.tags }}</p>
+
+    <button
+      class="border border-black rounded-md px-4 py-2 mt-10"
+      routerLink="">
+      Back
+    </button>
+  `,
+  host: {
+    class: 'p-5 block',
+  },
+})
+export default class DetailComponent {
+  @RouterInput({
+    required: true,
+    transform: (value: string) => JSON.parse(decodeURIComponent(value)),
+  })
+  photo!: Photo;
+}

apps/interop-rxjs-signal/src/app/list/photos.component.ts

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+import { NgFor, NgIf } from '@angular/common';
+import { Component, OnInit, inject } from '@angular/core';
+import { FormControl, ReactiveFormsModule } from '@angular/forms';
+import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatInputModule } from '@angular/material/input';
+import { MatProgressBarModule } from '@angular/material/progress-bar';
+import { RouterLinkWithHref } from '@angular/router';
+import { LetDirective } from '@ngrx/component';
+import { provideComponentStore } from '@ngrx/component-store';
+import { debounceTime, distinctUntilChanged, skipWhile, tap } from 'rxjs';
+import { Photo } from '../photo.model';
+import { PhotoStore } from './photos.store';
+
+@Component({
+  selector: 'app-photos',
+  standalone: true,
+  imports: [
+    ReactiveFormsModule,
+    MatFormFieldModule,
+    MatProgressBarModule,
+    NgIf,
+    NgFor,
+    MatInputModule,
+    LetDirective,
+    RouterLinkWithHref,
+  ],
+  template: `
+    <h2 class="text-xl mb-2">Photos</h2>
+
+    <mat-form-field appearance="fill">
+      <mat-label>Search</mat-label>
+      <input
+        type="text"
+        matInput
+        [formControl]="search"
+        placeholder="write an article" />
+    </mat-form-field>
+
+    <ng-container *ngrxLet="vm$ as vm">
+      <section class="flex flex-col">
+        <section class="flex gap-3 items-center">
+          <button
+            [disabled]="vm.page === 1"
+            [class.bg-gray-400]="vm.page === 1"
+            class="text-xl border rounded-md p-3"
+            (click)="store.previousPage()">
+            <
+          </button>
+          <button
+            [disabled]="vm.endOfPage"
+            [class.bg-gray-400]="vm.endOfPage"
+            class="text-xl border rounded-md p-3"
+            (click)="store.nextPage()">
+            >
+          </button>
+          Page :{{ vm.page }} / {{ vm.pages }}
+        </section>
+        <mat-progress-bar
+          mode="query"
+          *ngIf="vm.loading"
+          class="mt-5"></mat-progress-bar>
+        <ul
+          class="flex flex-wrap gap-4"
+          *ngIf="vm.photos && vm.photos.length > 0; else noPhoto">
+          <li *ngFor="let photo of vm.photos; trackBy: trackById">
+            <a routerLink="detail" [queryParams]="{ photo: encode(photo) }">
+              <img
+                src="{{ photo.url_q }}"
+                alt="{{ photo.title }}"
+                class="image" />
+            </a>
+          </li>
+        </ul>
+        <ng-template #noPhoto>
+          <div>No Photos found. Type a search word.</div>
+        </ng-template>
+        <footer class="text-red-500">
+          {{ vm.error }}
+        </footer>
+      </section>
+    </ng-container>
+  `,
+  providers: [provideComponentStore(PhotoStore)],
+  host: {
+    class: 'p-5 block',
+  },
+})
+export default class PhotosComponent implements OnInit {
+  store = inject(PhotoStore);
+  readonly vm$ = this.store.vm$.pipe(
+    tap(({ search }) => {
+      if (!this.formInit) {
+        this.search.setValue(search);
+        this.formInit = true;
+      }
+    })
+  );
+
+  private formInit = false;
+  search = new FormControl();
+
+  ngOnInit(): void {
+    this.store.search(
+      this.search.valueChanges.pipe(
+        skipWhile(() => !this.formInit),
+        debounceTime(300),
+        distinctUntilChanged()
+      )
+    );
+  }
+
+  trackById(index: number, photo: Photo) {
+    return photo.id;
+  }
+
+  encode(photo: Photo) {
+    return encodeURIComponent(JSON.stringify(photo));
+  }
+}

apps/interop-rxjs-signal/src/app/list/photos.store.ts

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+import { Injectable, inject } from '@angular/core';
+import {
+  ComponentStore,
+  OnStateInit,
+  OnStoreInit,
+  tapResponse,
+} from '@ngrx/component-store';
+import { pipe } from 'rxjs';
+import { filter, mergeMap, tap } from 'rxjs/operators';
+import { Photo } from '../photo.model';
+import { PhotoService } from '../photos.service';
+
+const PHOTO_STATE_KEY = 'photo_search';
+
+export interface PhotoState {
+  photos: Photo[];
+  search: string;
+  page: number;
+  pages: number;
+  loading: boolean;
+  error: unknown;
+}
+
+const initialState: PhotoState = {
+  photos: [],
+  search: '',
+  page: 1,
+  pages: 1,
+  loading: false,
+  error: '',
+};
+
+@Injectable()
+export class PhotoStore
+  extends ComponentStore<PhotoState>
+  implements OnStoreInit, OnStateInit
+{
+  private photoService = inject(PhotoService);
+
+  private readonly photos$ = this.select((s) => s.photos);
+  private readonly search$ = this.select((s) => s.search);
+  private readonly page$ = this.select((s) => s.page);
+  private readonly pages$ = this.select((s) => s.pages);
+  private readonly error$ = this.select((s) => s.error);
+  private readonly loading$ = this.select((s) => s.loading);
+
+  private readonly endOfPage$ = this.select(
+    this.page$,
+    this.pages$,
+    (page, pages) => page === pages
+  );
+
+  readonly vm$ = this.select(
+    {
+      photos: this.photos$,
+      search: this.search$,
+      page: this.page$,
+      pages: this.pages$,
+      endOfPage: this.endOfPage$,
+      loading: this.loading$,
+      error: this.error$,
+    },
+    { debounce: true }
+  );
+
+  ngrxOnStoreInit() {
+    const savedJSONState = localStorage.getItem(PHOTO_STATE_KEY);
+    if (savedJSONState === null) {
+      this.setState(initialState);
+    } else {
+      const savedState = JSON.parse(savedJSONState);
+      this.setState({
+        ...initialState,
+        search: savedState.search,
+        page: savedState.page,
+      });
+    }
+  }
+
+  ngrxOnStateInit() {
+    this.searchPhotos(
+      this.select({
+        search: this.search$,
+        page: this.page$,
+      })
+    );
+  }
+
+  readonly search = this.updater(
+    (state, search: string): PhotoState => ({
+      ...state,
+      search,
+      page: 1,
+    })
+  );
+
+  readonly nextPage = this.updater(
+    (state): PhotoState => ({
+      ...state,
+      page: state.page + 1,
+    })
+  );
+
+  readonly previousPage = this.updater(
+    (state): PhotoState => ({
+      ...state,
+      page: state.page - 1,
+    })
+  );
+
+  readonly searchPhotos = this.effect<{ search: string; page: number }>(
+    pipe(
+      filter(({ search }) => search.length >= 3),
+      tap(() => this.patchState({ loading: true, error: '' })),
+      mergeMap(({ search, page }) =>
+        this.photoService.searchPublicPhotos(search, page).pipe(
+          tapResponse(
+            ({ photos: { photo, pages } }) => {
+              this.patchState({
+                loading: false,
+                photos: photo,
+                pages,
+              });
+              localStorage.setItem(
+                PHOTO_STATE_KEY,
+                JSON.stringify({ search, page })
+              );
+            },
+            (error: unknown) => this.patchState({ error, loading: false })
+          )
+        )
+      )
+    )
+  );
+}

apps/interop-rxjs-signal/src/app/photo.model.ts

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+export interface Photo {
+  id: string;
+  title: string;
+  tags: string;
+  owner: string;
+  ownername: string;
+  datetaken: string;
+  url_q: string;
+  url_m: string;
+}

apps/interop-rxjs-signal/src/app/photos.service.ts

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+import { HttpClient } from '@angular/common/http';
+import { Injectable, inject } from '@angular/core';
+import { Observable } from 'rxjs';
+import { Photo } from './photo.model';
+
+export interface FlickrAPIResponse {
+  photos: {
+    pages: number;
+    photo: Photo[];
+  };
+}
+
+@Injectable({ providedIn: 'root' })
+export class PhotoService {
+  private http = inject(HttpClient);
+
+  public searchPublicPhotos(
+    searchTerm: string,
+    page: number
+  ): Observable<FlickrAPIResponse> {
+    return this.http.get<FlickrAPIResponse>(
+      'https://www.flickr.com/services/rest/',
+      {
+        params: {
+          tags: searchTerm,
+          method: 'flickr.photos.search',
+          format: 'json',
+          nojsoncallback: '1',
+          tag_mode: 'all',
+          media: 'photos',
+          per_page: '30',
+          page,
+          extras: 'tags,date_taken,owner_name,url_q,url_m',
+          api_key: 'c3050d39a5bb308d9921bef0e15c437d',
+        },
+      }
+    );
+  }
+}

apps/interop-rxjs-signal/src/index.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>rxjs-to-signal</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>

apps/interop-rxjs-signal/src/main.ts

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+import { bootstrapApplication } from '@angular/platform-browser';
+import { appConfig } from './app/app.config';
+import { AppComponent } from './app/app.component';
+
+bootstrapApplication(AppComponent, appConfig).catch((err) =>
+  console.error(err)
+);

apps/interop-rxjs-signal/src/styles.scss

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* You can add global styles to this file, and also import other style files */

apps/interop-rxjs-signal/src/test-setup.ts

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+import '@testing-library/jest-dom';
+import 'jest-preset-angular/setup-jest';