feat: challenge 54 pipe obs signal (#903)

README.md

@@ -24,7 +24,7 @@ If you would like to propose a challenge, this project is open source, so feel f
 
 ## Challenges
 
-Check [all 53 challenges](https://angular-challenges.vercel.app/)
+Check [all 54 challenges](https://angular-challenges.vercel.app/)
 
 ## Contributors ✨
 

apps/signal/54-pipe-observable-to-signal/.eslintrc.json

@@ -0,0 +1,19 @@
+{
+  "extends": ["../../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"],
+  "overrides": [
+    {
+      "files": ["*.ts"],
+      "extends": [
+        "plugin:@nx/angular",
+        "plugin:@angular-eslint/template/process-inline-templates"
+      ],
+      "rules": {}
+    },
+    {
+      "files": ["*.html"],
+      "extends": ["plugin:@nx/angular-template"],
+      "rules": {}
+    }
+  ]
+}

apps/signal/54-pipe-observable-to-signal/README.md

@@ -0,0 +1,13 @@
+# Pipe Observable to Signal
+
+> author: thomas-laforge
+
+### Run Application
+
+```bash
+npx nx serve signal-pipe-observable-to-signal
+```
+
+### Documentation and Instruction
+
+Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/signal/54-pipe-observable-to-signal/).

apps/signal/54-pipe-observable-to-signal/project.json

@@ -0,0 +1,72 @@
+{
+  "name": "signal-pipe-observable-to-signal",
+  "$schema": "../../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "prefix": "app",
+  "sourceRoot": "apps/signal/54-pipe-observable-to-signal/src",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@angular-devkit/build-angular:application",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/apps/signal/54-pipe-observable-to-signal",
+        "index": "apps/signal/54-pipe-observable-to-signal/src/index.html",
+        "browser": "apps/signal/54-pipe-observable-to-signal/src/main.ts",
+        "polyfills": ["zone.js"],
+        "tsConfig": "apps/signal/54-pipe-observable-to-signal/tsconfig.app.json",
+        "inlineStyleLanguage": "scss",
+        "assets": [
+          "apps/signal/54-pipe-observable-to-signal/src/favicon.ico",
+          "apps/signal/54-pipe-observable-to-signal/src/assets"
+        ],
+        "styles": ["apps/signal/54-pipe-observable-to-signal/src/styles.scss"],
+        "scripts": []
+      },
+      "configurations": {
+        "production": {
+          "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "500kb",
+              "maximumError": "1mb"
+            },
+            {
+              "type": "anyComponentStyle",
+              "maximumWarning": "2kb",
+              "maximumError": "4kb"
+            }
+          ],
+          "outputHashing": "all"
+        },
+        "development": {
+          "optimization": false,
+          "extractLicenses": false,
+          "sourceMap": true
+        }
+      },
+      "defaultConfiguration": "production"
+    },
+    "serve": {
+      "executor": "@angular-devkit/build-angular:dev-server",
+      "configurations": {
+        "production": {
+          "buildTarget": "signal-pipe-observable-to-signal:build:production"
+        },
+        "development": {
+          "buildTarget": "signal-pipe-observable-to-signal:build:development"
+        }
+      },
+      "defaultConfiguration": "development"
+    },
+    "extract-i18n": {
+      "executor": "@angular-devkit/build-angular:extract-i18n",
+      "options": {
+        "buildTarget": "signal-pipe-observable-to-signal:build"
+      }
+    },
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    }
+  }
+}

apps/signal/54-pipe-observable-to-signal/src/app/app.component.ts

@@ -0,0 +1,31 @@
+import { TableComponent } from '@angular-challenges/shared/ui';
+import { AsyncPipe } from '@angular/common';
+import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { CurrencyPipe } from './currency.pipe';
+import { ProductRowComponent } from './product-row.component';
+import { products } from './product.model';
+
+@Component({
+  standalone: true,
+  imports: [AsyncPipe, CurrencyPipe, TableComponent, ProductRowComponent],
+  selector: 'app-root',
+  template: `
+    <table [items]="products">
+      <ng-template #header>
+        <tr>
+          @for (col of displayedColumns; track col) {
+            <th>{{ col }}</th>
+          }
+        </tr>
+      </ng-template>
+      <ng-template #body let-product>
+        <tr product-row [product]="product"></tr>
+      </ng-template>
+    </table>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class AppComponent {
+  products = products;
+  displayedColumns = ['name', 'priceA', 'priceB', 'priceC'];
+}

apps/signal/54-pipe-observable-to-signal/src/app/currency.pipe.ts

@@ -0,0 +1,15 @@
+import { inject, Pipe, PipeTransform } from '@angular/core';
+import { map, Observable } from 'rxjs';
+import { CurrencyService } from './currency.service';
+
+@Pipe({
+  name: 'currency',
+  standalone: true,
+})
+export class CurrencyPipe implements PipeTransform {
+  currencyService = inject(CurrencyService);
+
+  transform(price: number): Observable<string> {
+    return this.currencyService.symbol$.pipe(map((s) => `${price}${s}`));
+  }
+}

apps/signal/54-pipe-observable-to-signal/src/app/currency.service.ts

@@ -0,0 +1,30 @@
+import { Injectable } from '@angular/core';
+import { BehaviorSubject, map } from 'rxjs';
+
+export interface Currency {
+  name: string;
+  code: string;
+  symbol: string;
+}
+
+export const currency: Currency[] = [
+  { name: 'Euro', code: 'EUR', symbol: '€' },
+  { name: 'Dollar US', code: 'USD', symbol: 'US$' },
+  { name: 'Dollar Autralien', code: 'AUD', symbol: 'AU$' },
+  { name: 'Livre Sterling', code: 'GBP', symbol: '£' },
+  { name: 'Dollar Canadien', code: 'CAD', symbol: 'CAD' },
+];
+
+@Injectable()
+export class CurrencyService {
+  private code = new BehaviorSubject('EUR');
+
+  readonly code$ = this.code.asObservable();
+  readonly symbol$ = this.code$.pipe(
+    map((code) => currency.find((c) => c.code === code)?.symbol ?? code),
+  );
+
+  public updateCode(code: string) {
+    this.code.next(code);
+  }
+}

apps/signal/54-pipe-observable-to-signal/src/app/product-row.component.ts

@@ -0,0 +1,34 @@
+import { AsyncPipe } from '@angular/common';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  inject,
+  Input,
+} from '@angular/core';
+import { CurrencyPipe } from './currency.pipe';
+import { CurrencyService } from './currency.service';
+import { Product } from './product.model';
+
+@Component({
+  standalone: true,
+  selector: 'tr[product-row]',
+  template: `
+    <td>{{ productInfo.name }}</td>
+    <td>{{ productInfo.priceA | currency | async }}</td>
+    <td>{{ productInfo.priceB | currency | async }}</td>
+    <td>{{ productInfo.priceC | currency | async }}</td>
+  `,
+  imports: [AsyncPipe, CurrencyPipe],
+  providers: [CurrencyService],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class ProductRowComponent {
+  protected productInfo!: Product;
+
+  @Input({ required: true }) set product(product: Product) {
+    this.currencyService.updateCode(product.currencyCode);
+    this.productInfo = product;
+  }
+
+  currencyService = inject(CurrencyService);
+}

apps/signal/54-pipe-observable-to-signal/src/app/product.model.ts

@@ -0,0 +1,55 @@
+export interface Product {
+  name: string;
+  priceA: number;
+  priceB: number;
+  priceC: number;
+  currencyCode: string;
+}
+
+export const products: Product[] = [
+  {
+    name: 'bike',
+    priceA: 1000,
+    priceB: 2000,
+    priceC: 2200,
+    currencyCode: 'USD',
+  },
+  { name: 'tent', priceA: 112, priceB: 120, priceC: 41, currencyCode: 'EUR' },
+  {
+    name: 'sofa',
+    priceA: 500,
+    priceB: 422,
+    priceC: 5000,
+    currencyCode: 'EUR',
+  },
+  {
+    name: 'watch',
+    priceA: 50,
+    priceB: 130,
+    priceC: 150,
+    currencyCode: 'AUD',
+  },
+  {
+    name: 'computer',
+    priceA: 1000,
+    priceB: 2200,
+    priceC: 3500,
+    currencyCode: 'GBP',
+  },
+  { name: 'mug', priceA: 10, priceB: 15, priceC: 20, currencyCode: 'EUR' },
+  {
+    name: 'headset',
+    priceA: 100,
+    priceB: 150,
+    priceC: 220,
+    currencyCode: 'CAD',
+  },
+  { name: 'cable', priceA: 5, priceB: 10, priceC: 15, currencyCode: 'EUR' },
+  {
+    name: 'table',
+    priceA: 100,
+    priceB: 20,
+    priceC: 500,
+    currencyCode: 'EUR',
+  },
+];

apps/signal/54-pipe-observable-to-signal/src/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>signal-pipe-observable-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/signal/54-pipe-observable-to-signal/src/main.ts

@@ -0,0 +1,4 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { AppComponent } from './app/app.component';
+
+bootstrapApplication(AppComponent).catch((err) => console.error(err));

apps/signal/54-pipe-observable-to-signal/src/styles.scss

@@ -0,0 +1,26 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* You can add global styles to this file, and also import other style files */
+table {
+  width: 100%;
+}
+
+table thead > tr > th {
+  text-align: left;
+  padding: 1rem 1rem;
+  border: 1px solid #dee2e6;
+  border-width: 0 0 1px 0;
+  font-weight: 700;
+  color: #343a40;
+  background: #f8f9fa;
+  transition: box-shadow 0.2s;
+}
+
+table tbody > tr > td {
+  text-align: left;
+  border: 1px solid #dee2e6;
+  border-width: 0 0 1px 0;
+  padding: 1rem 1rem;
+}

apps/signal/54-pipe-observable-to-signal/tailwind.config.js

@@ -0,0 +1,14 @@
+const { createGlobPatternsForDependencies } = require('@nx/angular/tailwind');
+const { join } = require('path');
+
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: [
+    join(__dirname, 'src/**/!(*.stories|*.spec).{ts,html}'),
+    ...createGlobPatternsForDependencies(__dirname),
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};

apps/signal/54-pipe-observable-to-signal/tsconfig.app.json

@@ -0,0 +1,10 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../../dist/out-tsc",
+    "types": []
+  },
+  "files": ["src/main.ts"],
+  "include": ["src/**/*.d.ts"],
+  "exclude": ["jest.config.ts", "src/**/*.test.ts", "src/**/*.spec.ts"]
+}

apps/signal/54-pipe-observable-to-signal/tsconfig.editor.json

@@ -0,0 +1,6 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["src/**/*.ts"],
+  "compilerOptions": {},
+  "exclude": ["jest.config.ts", "src/**/*.test.ts", "src/**/*.spec.ts"]
+}

apps/signal/54-pipe-observable-to-signal/tsconfig.json

@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    "target": "es2022",
+    "useDefineForClassFields": false,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.editor.json"
+    },
+    {
+      "path": "./tsconfig.app.json"
+    }
+  ],
+  "extends": "../../../tsconfig.base.json",
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  }
+}

challenge-number.json

@@ -1,6 +1,6 @@
 {
-  "total": 53,
+  "total": 54,
   "🟢": 21,
   "🟠": 122,
-  "🔴": 209
+  "🔴": 210
 }

docs/src/content/docs/challenges/signal/53-big-signal-performance.md

@@ -9,7 +9,6 @@ challengeNumber: 53
 command: signal-big-signal-performance
 sidebar:
   order: 122
-  badge: New
 ---
 
 ## Information

docs/src/content/docs/challenges/signal/54-pipe-observable-to-signal.md

@@ -0,0 +1,22 @@
+---
+title: 🔴 Pipe Observable to Signal
+description: Challenge 54 is about refactoring an application using observable to signals
+author: thomas-laforge
+contributors:
+  - tomalaforge
+challengeNumber: 54
+command: signal-pipe-observable-to-signal
+sidebar:
+  order: 210
+  badge: New
+---
+
+## Information
+
+We have a legacy application that is using observables to store a state. Signals are a very good fit for that.
+
+## Statement
+
+So the goal of this challenge is to refactor the following application to be a fully signal based application.
+
+Be careful along the way, everything might not work as you wish.

docs/src/content/docs/es/index.mdx

@@ -13,7 +13,7 @@ hero:
       icon: right-arrow
       variant: primary
     - text: Ir al Desafío más reciente
-      link: /es/challenges/signal/53-big-signal-performance/
+      link: /es/challenges/signal/54-pipe-observable-to-signal/
       icon: rocket
     - text: Dar una estrella
       link: https://github.com/tomalaforge/angular-challenges
@@ -26,8 +26,8 @@ import MyIcon from '../../../components/MyIcon.astro';
 import SubscriptionForm from '../../../components/SubscriptionForm.astro';
 
 <CardGrid>
-<Card title="53 Desafíos">
+<Card title="54 Desafíos">
-  Este repositorio contiene 53 Desafíos relacionados con <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> y <b>Typescript</b>.
+  Este repositorio contiene 54 Desafíos relacionados con <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> y <b>Typescript</b>.
   Estos desafíos se resuelven en torno a problemas de la vida real o características específicas para mejorar tus habilidades.
 </Card>
 

docs/src/content/docs/fr/index.mdx

@@ -13,7 +13,7 @@ hero:
       icon: right-arrow
       variant: primary
     - text: Aller au dernier Challenge
-      link: /fr/challenges/signal/53-big-signal-performance/
+      link: /fr/challenges/signal/54-pipe-observable-to-signal/
       icon: rocket
     - text: Donne une étoile
       link: https://github.com/tomalaforge/angular-challenges
@@ -26,8 +26,8 @@ import MyIcon from '../../../components/MyIcon.astro';
 import SubscriptionForm from '../../../components/SubscriptionForm.astro';
 
 <CardGrid>
-<Card title="53 Défis">
+<Card title="54 Défis">
-    Ce répertoire rassemble 53 Défis liés à <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> et <b>Typescript</b>. Ces défis portent sur des problèmes réels ou des fonctionnalités spécifiques pour améliorer vos compétences.
+    Ce répertoire rassemble 54 Défis liés à <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> et <b>Typescript</b>. Ces défis portent sur des problèmes réels ou des fonctionnalités spécifiques pour améliorer vos compétences.
 </Card>
 
 <Card title="Subscribe to get notify of latest challenges">

docs/src/content/docs/pt/index.mdx

@@ -13,7 +13,7 @@ hero:
       icon: right-arrow
       variant: primary
     - text: Ir para o desafio mais recente
-      link: /pt/challenges/signal/53-big-signal-performance/
+      link: /pt/challenges/signal/54-pipe-observable-to-signal/
       icon: rocket
     - text: Dar uma estrela
       link: https://github.com/tomalaforge/angular-challenges
@@ -26,8 +26,8 @@ import MyIcon from '../../../components/MyIcon.astro';
 import SubscriptionForm from '../../../components/SubscriptionForm.astro';
 
 <CardGrid>
-  <Card title="53 Desafios">
+  <Card title="54 Desafios">
-    Este repositório possui 53 Desafios relacionados a <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>,
+    Este repositório possui 54 Desafios relacionados a <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>,
     <b>Ngrx</b> e <b>Typescript</b>.
     Esses desafios são voltados para problemas reais ou funcionalidades específicas afim de
     melhorar suas habilidades.

docs/src/content/docs/ru/index.mdx

@@ -13,7 +13,7 @@ hero:
       icon: right-arrow
       variant: primary
     - text: Перейти к последней задаче
-      link: /ru/challenges/signal/53-big-signal-performance/
+      link: /ru/challenges/signal/54-pipe-observable-to-signal/
       icon: rocket
     - text: Добавить звезду
       link: https://github.com/tomalaforge/angular-challenges
@@ -26,8 +26,8 @@ import MyIcon from '../../../components/MyIcon.astro';
 import SubscriptionForm from '../../../components/SubscriptionForm.astro';
 
 <CardGrid>
-<Card title="53 испытаний">
+<Card title="54 испытаний">
-  Этот репозиторий содержит 53 испытаний, связанных с <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> и <b>Typescript</b>.
+  Этот репозиторий содержит 54 испытаний, связанных с <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> и <b>Typescript</b>.
   Испытания основаны на реальных задачах или инструментах для того, чтобы прокачать вас.
 </Card>
 

libs/shared/ui/src/lib/table.component.ts

@@ -1,21 +1,20 @@
-import { NgFor, NgTemplateOutlet } from '@angular/common';
+import { NgTemplateOutlet } from '@angular/common';
 import { Component, ContentChild, Input, TemplateRef } from '@angular/core';
 
 @Component({
   selector: 'table',
   standalone: true,
-  imports: [NgTemplateOutlet, NgFor],
+  imports: [NgTemplateOutlet],
   template: `
     <thead>
       <ng-container *ngTemplateOutlet="headerTemplate"></ng-container>
     </thead>
-    <tbody *ngFor="let item of items">
+    @for (item of items; track $index) {
-      <ng-container
+      <tbody>
-        *ngTemplateOutlet="
+        <ng-container
-          bodyTemplate;
+          *ngTemplateOutlet="bodyTemplate; context: { $implicit: item }" />
-          context: { $implicit: item }
+      </tbody>
-        "></ng-container>
+    }
-    </tbody>
   `,
 })
 export class TableComponent<T> {