LemonMart

LemonMart was implemented with a Route-first approach to designing SPAs.

^{As of December 2020}

Get the book & watch the talk

LemontMart has been developed in support of my book Angular for Enterprise-Ready Web Applications. You can get the book at any major bookstore or find the links at http://AngularForEnterprise.com.

Watch the talk on Architecture for Scalable Angular Apps on Pluralsight.

Check out the slides for Architecture for Scalable Angular Apps free at Slides.com.

Check out LocalCast Weather, to learn Angular, Material, RxJS fundemantals using OpenWeatherMap.org APIs, at https://github.com/duluca/local-weather-app.

Build, debug and publish Docker images with npm Scripts for Docker and achieve Blue-Green deployments on AWS Fargate with npm Scripts for AWS.

Router-first Approach

A router-first approach to SPA design will save development teams, large and small, significant waste in duplicative work, and re-architecting of the code base to enable better collaboration or achieve sub-second first meaningful paints in your application.

In order to pull off a router-first implementation, you need to:

1. Define user roles and a site-map early on,
2. Design with lazy loading in mind, leveraging router outlets, auxiliary paths and smart link tracking,
3. Implement a walking-skeleton navigation experience and validate, allowing multiple teams to execute seamlessly,
4. Design around major data components, using stateless data-driven components using RxJS/BehaviorSubjects,
5. Be disciplined in sticking to a decoupled component architecture, allowing remixing the UX quickly to respond to changes in requirements without having to re-architect the codebase,
6. Differentiate between user controls and components to appropriate use binding, resolve and auth guards,
7. With TypeScript classes, interfaces, enums, validators and pipes maximize code reuse

Design Artifacts

Head over to the Wiki for user roles, site maps, data entity diagrams and user mock ups: https://github.com/duluca/lemon-mart/wiki.

Building Lemon Mart

• npm run build:prod to build a production optimized version of the app.
• npm run docker:debug to run tests and build a containerized version of the app.
• integration.Dockerfile is a multi-stage Dockerfile that can be used to build and test the app in various CI environments in a consistent mannger. The optimized image generated in the last step, can then be deployed to any Docker host, including AWS, Heroku, Zeit Now and Azure.

Authentication

For demonstration purposes the login screen shows the Authentication Mode of the app. There are three modes:

• InMemory: auth.inmemory.service.ts
• Custom: auth.custom.service.ts
• Firebase: auth.firebase.service.ts

The current mode can be adjusted in environment.ts. You can see how each mode is implemented in the link source files above.

This is covered in more detail in Angular for Enterprise, 2nd Edition.

Build Configurations

There are 3 build configurations that maps to authentication modes:

1. Production:

Executing npm run build:prod or npx ng build --prod or npx ng build --configuration=production leverages InMemory authentication. Note that the fake credentials are documented on the Login screen.

2. Firebase:

Executing npx ng build --configuration=firebase leverages Firebase authentication. For this to work, you must setup your own Firebase back-end and create a user in the Firebase console.

3. Lemon-Mart-Server:

Executing npx ng build --configuration=lemon-mart-server leverages Custom authentication. Note that this is implemented by the example projects Lemon Mart Server, which is detailed below.

Lemon Mart Server

Lemon Mart Server is an easy to learn and use TypeScript Node.js server using Minimal MEAN for Lemon Mart.

In order to run Lemon Mart in a full-stack set up, visit https://github.com/duluca/lemon-mart-server.

Developers

This project is a sample implementation, which contains numerous recipes and design patterns useful to develop an Angular application.

If you'd like to use this project as a starter or a template project for your project, you can get a lot of benefit out of using a pre-configured project. Some the benefits are:

• Optimized development experience for VS Code
• Lazy loading feature module configuration
• A responsive landing, login, and user profile experience
• Angular Material and Angular Flex Layout configured for UI development
• npm scripts for style and lint checks, building docker containers, testing, or deploying your app
• CircleCI configuration for Continuous Integration
• Pre-wired extensible authentication and authorization module
• And many more.

Pre-requisites

• Do NOT install @angular/cli or typescript globally to avoid version mismatch issues across multiple projects.
  • Note: When creating new projects in the future, execute npx @angular/cli new app-name --routing to create a new Angular app with basic routing wired.
  • If you have trouble with this command, try npx -p @angular/cli new app-name --routing
• To run ng commands from within the project directory, preprend npx to commands, like npx ng build.
• To continue using ng without having to prepend npx, configure shell autofallback as described here: https://www.npmjs.com/package/npx#shell-auto-fallback.

Adapting the template

• Fork and clone this repo.
• Rename the repo on GitHub to match the name of your project.
• Search and replace references to lemon-mart with your project name and git repo.
• Remove manager, pos, and inventory folders and references to them from app-routing.module.ts.
• You may modify profile.component.ts and view-user.component.ts under the user folder to fit your needs.
• Edit lemonmart-theme.scss to match your desired color scheme.
• Now you may begin implementing your own feature modules.
  • Questions? Consider creating an issue on this repo and buying my book at http://AngularForEnterprise.com.

During Development

• Run npm start for a developmenet web server.
• Navigate to http://localhost:5000/. The app will automatically reload if you change any of the source files.
  • Note that the port is different than the default Angular port of 4200 intentionally, so you can run test projects or proof of concepts side-by-side without the hassle of specifiying a new port.
• Run npm test to execute the unit tests via Karma.
• Run npm run e2e to execute the end-to-end tests via Protractor.

Code scaffolding

• Run ng generate component component-name to generate a new component. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module.

Further help with Angular CLI

To get more help on the Angular CLI use ng help or go check out the Angular CLI README.

Full-Stack Setup with Docker Compose and Deploying to AWS

See the example project here https://github.com/duluca/lemon-mart-server