feat(injectionToken): create new challenge on injectionToken

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 38 challenges](https://angular-challenges.vercel.app/)
+Check [all 39 challenges](https://angular-challenges.vercel.app/)
 
 ## Contributors ✨
 

apps/angular/injection-token/.eslintrc.json

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

apps/angular/injection-token/README.md

@@ -0,0 +1,13 @@
+# InjectionToken
+
+> Author: Thomas Laforge
+
+### Run Application
+
+```bash
+npx nx serve angular-injection-token
+```
+
+### Documentation and Instruction
+
+Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/angular/39-injection-token/).

apps/angular/injection-token/jest.config.ts

@@ -0,0 +1,22 @@
+/* eslint-disable */
+export default {
+  displayName: 'angular-injection-token',
+  preset: '../../../jest.preset.js',
+  setupFilesAfterEnv: ['<rootDir>/src/test-setup.ts'],
+  coverageDirectory: '../../../coverage/apps/angular/injection-token',
+  transform: {
+    '^.+\\.(ts|mjs|js|html)$': [
+      'jest-preset-angular',
+      {
+        tsconfig: '<rootDir>/tsconfig.spec.json',
+        stringifyContentPathRegex: '\\.(html|svg)$',
+      },
+    ],
+  },
+  transformIgnorePatterns: ['node_modules/(?!.*\\.mjs$)'],
+  snapshotSerializers: [
+    'jest-preset-angular/build/serializers/no-ng-attributes',
+    'jest-preset-angular/build/serializers/ng-snapshot',
+    'jest-preset-angular/build/serializers/html-comment',
+  ],
+};

apps/angular/injection-token/project.json

@@ -0,0 +1,95 @@
+{
+  "name": "angular-injection-token",
+  "$schema": "../../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "prefix": "app",
+  "sourceRoot": "apps/angular/injection-token/src",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@angular-devkit/build-angular:browser",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/apps/angular/injection-token",
+        "index": "apps/angular/injection-token/src/index.html",
+        "main": "apps/angular/injection-token/src/main.ts",
+        "polyfills": ["zone.js"],
+        "tsConfig": "apps/angular/injection-token/tsconfig.app.json",
+        "assets": [
+          "apps/angular/injection-token/src/favicon.ico",
+          "apps/angular/injection-token/src/assets"
+        ],
+        "styles": ["apps/angular/injection-token/src/styles.scss"],
+        "scripts": []
+      },
+      "configurations": {
+        "production": {
+          "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "500kb",
+              "maximumError": "1mb"
+            },
+            {
+              "type": "anyComponentStyle",
+              "maximumWarning": "2kb",
+              "maximumError": "4kb"
+            }
+          ],
+          "outputHashing": "all"
+        },
+        "development": {
+          "buildOptimizer": false,
+          "optimization": false,
+          "vendorChunk": true,
+          "extractLicenses": false,
+          "sourceMap": true,
+          "namedChunks": true
+        }
+      },
+      "defaultConfiguration": "production"
+    },
+    "serve": {
+      "executor": "@angular-devkit/build-angular:dev-server",
+      "configurations": {
+        "production": {
+          "browserTarget": "angular-injection-token:build:production"
+        },
+        "development": {
+          "browserTarget": "angular-injection-token:build:development"
+        }
+      },
+      "defaultConfiguration": "development"
+    },
+    "extract-i18n": {
+      "executor": "@angular-devkit/build-angular:extract-i18n",
+      "options": {
+        "browserTarget": "angular-injection-token:build"
+      }
+    },
+    "lint": {
+      "executor": "@nx/linter:eslint",
+      "outputs": ["{options.outputFile}"],
+      "options": {
+        "lintFilePatterns": [
+          "apps/angular/injection-token/**/*.ts",
+          "apps/angular/injection-token/**/*.html"
+        ]
+      }
+    },
+    "test": {
+      "executor": "@nx/jest:jest",
+      "outputs": ["{workspaceRoot}/coverage/{projectRoot}"],
+      "options": {
+        "jestConfig": "apps/angular/injection-token/jest.config.ts",
+        "passWithNoTests": true
+      },
+      "configurations": {
+        "ci": {
+          "ci": true,
+          "codeCoverage": true
+        }
+      }
+    }
+  }
+}

apps/angular/injection-token/src/app/app.component.ts

@@ -0,0 +1,21 @@
+import { Component } from '@angular/core';
+import { RouterLink, RouterOutlet } from '@angular/router';
+
+@Component({
+  standalone: true,
+  imports: [RouterOutlet, RouterLink],
+  selector: 'app-root',
+  template: ` <div class="flex gap-4 mb-5">
+      <button class="border rounded-md px-4 py-2" routerLink="video">
+        Video
+      </button>
+      <button class="border rounded-md px-4 py-2" routerLink="phone">
+        Phone
+      </button>
+    </div>
+    <router-outlet />`,
+  host: {
+    class: 'p-10 flex flex-col',
+  },
+})
+export class AppComponent {}

apps/angular/injection-token/src/app/app.config.ts

@@ -0,0 +1,12 @@
+import { ApplicationConfig } from '@angular/core';
+import { provideRouter } from '@angular/router';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideRouter([
+      { path: '', pathMatch: 'full', redirectTo: 'video' },
+      { path: 'video', loadComponent: () => import('./video.component') },
+      { path: 'phone', loadComponent: () => import('./phone.component') },
+    ]),
+  ],
+};

apps/angular/injection-token/src/app/data.ts

@@ -0,0 +1 @@
+export const DEFAULT_TIMER = 1000;

apps/angular/injection-token/src/app/phone.component.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { TimerContainerComponent } from './timer-container.component';
+
+@Component({
+  standalone: true,
+  imports: [TimerContainerComponent],
+  template: `<div class="flex gap-2">
+      Phone Call Timer:
+      <p class="italic">(should be 2000s)</p>
+    </div>
+    <timer-container />`,
+})
+export default class PhoneComponent {}

apps/angular/injection-token/src/app/timer-container.component.ts

@@ -0,0 +1,21 @@
+import { Component } from '@angular/core';
+import { DEFAULT_TIMER } from './data';
+import { TimerComponent } from './timer.component';
+@Component({
+  selector: 'timer-container',
+  standalone: true,
+  imports: [TimerComponent],
+  template: `
+    <div class="flex gap-2">
+      Timer container:
+      <p class="italic">(timer is {{ timer }}s)</p>
+    </div>
+    <timer />
+  `,
+  host: {
+    class: 'border rounded-md flex p-4 gap-10',
+  },
+})
+export class TimerContainerComponent {
+  timer = DEFAULT_TIMER;
+}

apps/angular/injection-token/src/app/timer.component.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { toSignal } from '@angular/core/rxjs-interop';
+import { interval } from 'rxjs';
+import { DEFAULT_TIMER } from './data';
+
+@Component({
+  selector: 'timer',
+  standalone: true,
+  template: ` Timer running {{ timer() }} `,
+})
+export class TimerComponent {
+  timer = toSignal(interval(DEFAULT_TIMER));
+}

apps/angular/injection-token/src/app/video.component.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { TimerContainerComponent } from './timer-container.component';
+
+@Component({
+  standalone: true,
+  imports: [TimerContainerComponent],
+  template: `<div class="flex gap-2">
+      Video Call Timer:
+      <p class="italic">(should be the default 1000s)</p>
+    </div>
+    <timer-container />`,
+})
+export default class VideoComponent {}

apps/angular/injection-token/src/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>angular-injection-token</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/angular/injection-token/src/main.ts

@@ -0,0 +1,7 @@
+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/angular/injection-token/src/styles.scss

@@ -0,0 +1,5 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* You can add global styles to this file, and also import other style files */

apps/angular/injection-token/src/test-setup.ts

@@ -0,0 +1,2 @@
+import '@testing-library/jest-dom';
+import 'jest-preset-angular/setup-jest';

apps/angular/injection-token/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/angular/injection-token/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/angular/injection-token/tsconfig.editor.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["src/**/*.ts"],
+  "compilerOptions": {
+    "types": ["jest", "node"]
+  }
+}

apps/angular/injection-token/tsconfig.json

@@ -0,0 +1,32 @@
+{
+  "compilerOptions": {
+    "target": "es2022",
+    "useDefineForClassFields": false,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    },
+    {
+      "path": "./tsconfig.editor.json"
+    }
+  ],
+  "extends": "../../../tsconfig.base.json",
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  }
+}

apps/angular/injection-token/tsconfig.spec.json

@@ -0,0 +1,15 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "module": "commonjs",
+    "types": ["jest", "node", "@testing-library/jest-dom"]
+  },
+  "files": ["src/test-setup.ts"],
+  "include": [
+    "jest.config.ts",
+    "src/**/*.test.ts",
+    "src/**/*.spec.ts",
+    "src/**/*.d.ts"
+  ]
+}

challenge-number.json

@@ -1,6 +1,6 @@
 {
-  "total": 38,
+  "total": 39,
   "🟢": 14,
-  "🟠": 117,
+  "🟠": 118,
   "🔴": 207
 }

docs/src/content/docs/challenges/angular/39-injection-token.md

@@ -0,0 +1,31 @@
+---
+title: 🟠 InjectionToken
+description: Challenge 39 is about learning the power of dependancy injection
+author: Thomas Laforge
+challengeNumber: 39
+command: angular-injection-token
+sidebar:
+  order: 118
+  badge: New
+---
+
+## Information
+
+In this small application, we start with a `VideoComponent` containing a **1-second** timer. The development team decided to use a global constant to store the timer value: `DEFAULT_TIMER`. However, a few weeks later, the product team wants to add a new screen for phone calls called `PhoneComponent`, and we want to reuse the `TimerComponent`. However, the product team wants a timer of **2 seconds**. How can we achieve this?
+
+## Statement
+
+Currently, the timer is still 1 second for the `PhoneComponent`. The goal of this challenge is to change the timer value to 2 seconds for the `PhoneComponent`.
+
+## Constraints
+
+The use of `@Input` is forbidden. This example is basic, and using `@Input` could be a good option, but in more complex applications, the component we need to update can be deeply nested, making the use of `@Input` a really bad design.
+
+## Hint
+
+<details>
+  <summary>Hint 1</summary>
+
+Looking at `InjectionToken` can be of great help.
+
+</details>

docs/src/content/docs/challenges/rxjs/38-rxjs-catch-error.md

@@ -6,7 +6,6 @@ command: rxjs-catch-error
 challengeNumber: 38
 sidebar:
   order: 14
-  badge: New
 ---
 
 ## Information

docs/src/content/docs/index.mdx

@@ -13,7 +13,7 @@ hero:
       icon: right-arrow
       variant: primary
     - text: Go to the latest Challenge
-      link: /challenges/rxjs/38-rxjs-catch-error/
+      link: /challenges/angular/39-injection-token/
       icon: rocket
     - text: Give a star
       link: https://github.com/tomalaforge/angular-challenges
@@ -25,8 +25,8 @@ import { Card, CardGrid } from '@astrojs/starlight/components';
 import MyIcon from '../../components/MyIcon.astro';
 
 <CardGrid>
-<Card title="38 Challenges">
+<Card title="39 Challenges">
-    This repository gathers 38 Challenges related to <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> and <b>Typescript</b>. 
+    This repository gathers 39 Challenges related to <b>Angular</b>, <b>Nx</b>, <b>RxJS</b>, <b>Ngrx</b> and <b>Typescript</b>. 
     These challenges resolve around real-life issues or specific features to elevate your skills.
 </Card>