Flutter Foundations Course - eCommerce App

This is the official repo for this course:

• Flutter Foundations

This will include a full-stack eCommerce app using Flutter & Firebase:

A Flutter web preview of the app can be found here:

• Flutter Web Demo

Project Setup

To clone the repo for the first time and open it in VSCode, run this:

git clone https://github.com/bizz84/complete-flutter-course.git
cd complete-flutter-course
code .

This will checkout the main branch which contains the latest code.

But at various points in the course, I'll ask you to checkout a specific branch name, so you can follow along with the right code, at the right time.

And to prevent any conflicts, you may need to reset your local changes:

git reset --hard HEAD
git checkout <branch-name>

Troubleshooting

If the course project doesn't compile or run for you, there are a number of things to look out for.

I'm keeping a list of all the FAQs here:

• List of Common Problems and Solutions

Flutter Foundations - Course Syllabus

1. Intro & Project Overview

1. What you will learn in this course
2. Section overview
3. VSCode Shortcuts, Extensions & Settings for Flutter development
4. Join the Slack Channel
5. Course Project on GitHub
6. Download the Starter Project & pubspec.yaml overview
7. eCommerce app overview
8. Code walkthrough: project structure
9. Exploring the codebase with the Widget Inspector (DevTools)
10. UI Design Principles: Composition & Reusable Widget Classes
11. Useful Widgets for Responsive Design
12. App Localization

2. Navigation with GoRouter

1. Section Intro
2. Limitations of Navigator 1.0
3. GoRouter installation & initial setup with MaterialApp.router
4. Routes, sub-routes and navigation
5. GoRouterHelper Extension and pageBuilder
6. Adding some additional routes
7. Routing by path vs routing by name
8. Routing with parameters
9. GoRouter error handling
10. Navigating with go vs push
11. Adding the remaining routes
12. How to pop a route with GoRouter
13. Nested Navigation
14. Bug fix & wrap up

3. Flutter App Architecture

1. Section Intro
2. Popular App Architectures: MVC, MVP, MVVM, Clean Architecture, Bloc
3. Riverpod App Architecture with the Controller-Service-Repository Pattern
4. Project Structure: Feature-first vs Layer-first
5. The Repository Pattern and the Data Layer
6. Implementing the "fake" products repository as a singleton
7. Working with Future and Stream-based APIs
8. Wrap Up

4. State Management with Riverpod - Part 1 (Product Listings)

1. Section Intro
2. Introduction to Riverpod
3. Riverpod installation and setup
4. Creating our first provider
5. Reading providers with ConsumerWidget and Consumer
6. Working with FutureProvider, StreamProvider, and AsyncValue
7. Testing AsyncValue by adding a delay
8. The family modifier
9. The autoDispose modifier + advanced data caching options
10. Creating a reusable AsyncValueWidget helper
11. Wrap Up + Exercise

5. State Management with Riverpod - Part 2 (Authentication Flow)

1. Section intro
2. Implementing a fake authentication repository
3. Creating repositories using abstract classes (optional)
4. Intro: a reactive in-memory store with RxDart
5. Implementing the InMemoryStore with RxDart
6. Using the InMemoryStore in the FakeAuthRepository
7. Accessing the FakeAuthRepository with ref.read() in the AccountScreen
8. Creating our first controller using StateNotifier
9. Using the StateNotifier inside the AccountScreen widget
10. Listening to provider state changes with ref.listen()
11. Bug-fix for Navigator.pop
12. The AsyncValue.guard method
13. Adding an AsyncValue extension method
14. Using the authStateChangesProvider in HomeAppBar
15. Intro to the email & password sign-in screen
16. How to generate immutable state classes in Dart
17. Using AsyncValue inside EmailPasswordSignInState
18. Implementing the EmailPasswordSignInController
19. Using the EmailPasswordSignInController in the widget class
20. Bug fix + filtering state updates with select()
21. GoRouter redirects
22. GoRouter: the refreshListenable argument
23. Wrap Up

6. Automated Testing - Part 1

1. Section Intro
2. Introduction to Automated Testing and the Testing Pyramid
3. Getting started with automated testing
4. Writing the first unit test + adding toString() and equality implementations
5. Test matchers and working with methods that throw exceptions
6. Fixing the getProduct() method and updating the unit tests
7. Working with groups and testing Futures and Streams
8. Adding an optional delay to the FakeProductsRepository
9. How to generate a Flutter test coverage report in VSCode
10. Testing the FakeAuthRepository (part 1)
11. Testing the FakeAuthRepository (part 2) + advanced stream matchers
12. Mocks vs Fakes + installing the mocktail package
13. Testing the AccountScreenController (part 1) + AsyncValue subclasses
14. Testing the AccountScreenController (part 2) + working with mocks
15. Testing the AccountScreenController (part 3) + type matchers
16. Testing with Stream Matchers and Predicates
17. Testing lifecycle methods (setUp, tearDown, setUpAll, tearDownAll)
18. Testing the EmailPasswordSignInController with acceptance criteria
19. Testing the EmailPasswordSignInController (part 2)
20. Tip: setting custom test timeouts per-file
21. Adding a test workflow to automate testing with GitHub Actions
22. Wrap up

7. Automated Testing - Part 2

1. Section Intro
2. Introduction to widget tests + starter project
3. Writing our first widget test using pumpWidget()
4. Working with WidgetTester and finder
5. Robot testing
6. How to find widgets by key
7. Writing widget tests with mocks and provider overrides
8. Writing widget tests with Future.delayed() and runAsync()
9. Adding the email & password widget tests
10. Adding the email & password widget tests (part 2)
11. Test setup for the authentication flow + using pumpAndSettle()
12. Fixing the RenderFlex overflow error
13. Completing the authentication flow test
14. Integration tests
15. Golden image tests
16. Running golden image tests with size variants
17. How to deal with holden image tests failing on CI
18. Wrap Up

8. Feature: Shopping Cart

1. Section Intro
2. Overview of the shopping cart feature + technical requirements
3. App Architecture for the shopping cart feature
4. Starter project + overview of the data and domain layers
5. Local data persistence with Sembast: Initial setup
6. How to persist the shopping cart data with the SembastCartRepository
7. Implementing the CartService class
8. Updating the CartService class to read dependencies using Ref
9. Writing unit tests using ProviderContainer
10. Writing the unit tests for the CartService class
11. Implementing the AddToCartController
12. Updating the AddToCartWidget
13. Bug Fix: Adding autoDispose to the AddToCartController
14. Showing the cart items in the ShoppingCartScreen + AutoDispose vs AlwaysAlive error when combining providers
15. Implementing the ShoppingCartItemController
16. Updating the EditOrRemoveItemWidget and ShoppingCartScreen widgets
17. Calculating and showing the cart items count
18. Calculating and showing the cart total price
19. Limiting the available quantity when adding items to the shopping cart
20. Implementing the CartSyncService with a listener
21. Registering the CartSyncService with ProviderContainer when the app starts
22. Implementing the logic inside the CartSyncService
23. Implementing the logic inside the CartSyncService (part 2 - optional)
24. Unit tests for the CartSyncService
25. Unit-testing providers with dependencies using ProviderContainer
26. Updated widget and integration tests
27. Wrap up + exercise (implement a wish list feature)

9. Feature: Checkout Flows

1. Section intro
2. Starter project for the checkout flows
3. Updating the CheckoutScreen with the PageController initialization logic
4. Do we need a StateNotifier for the CheckoutScreen?
5. Updating the PaymentPage
6. Implementing the PaymentButtonController
7. Wrap Up

10. Error Handling

1. Intro
2. Errors vs exceptions
3. Starter project overview + defining custom exceptions with enums
4. Using sealed classes to define exception types
5. Using the AppException sealed class in the FakeAuthRepository
6. Adding an AsyncErrorLogger using ProviderObserver
7. Creating a reusable ErrorLogger to catch all exceptions
8. Completing the error handling system
9. Working with the Result type (Success and Error)
10. Drawbacks of the Result type (and when not to use it)
11. Wrap Up

11. Feature: Product Reviews

1. Section Intro
2. Starter project overview
3. Overview of the LeaveReviewScreen
4. Implemeting a LeaveReviewController and submitting form data
5. Testing the LeaveReviewForm and preventing an AssertionError
6. Dismissing the LeaveReviewScreen programmatically on success using a callback
7. How to prefill a form with data from a repository/backend
8. Optimization: only submit the form if the data has changed
9. Showing existing reviews in the ProductReviewsList
10. Updating the LeaveReviewAction by reading read data from the userPurchaseProvider
11. Calculating the average product ratings
12. Updated tests & wrap up

12. Feature: Products Search

1. Section Intro
2. Client-side vs server-side search
3. Adding a search method to the FakeProductsRepository
4. Implementing client-side search with StateProvider and FutureProvider
5. Riverpod caching with autoDispose, keepAlive() and Timer
6. Debouncing and cancelling network requests

13. New Riverpod 2.x APIs & Riverpod Generator

1. Introduction to Riverpod 2.x
2. Starter project and updated code walkthrough
3. Installing the Riverpod Generator package
4. Generating providers with the @riverpod syntax
5. Migrating some more providers to Riverpod Generator + the keepAlive syntax
6. Migrating the AccountScreenController from StateNotifier to AsyncNotifier
7. Converting the AccountScreenController to use Riverpod Generator
8. How to check if an AsyncNotifier is mounted
9. How to write unit tests for AsyncNotifier subclasses
10. Wrap Up
11. Conclusion & Next Steps

LICENSE: MIT