12 Commits (415fdbbf1ba8aefab43a6cc9977ae28bce20dede)

Author	SHA1	Message	Date
Miguel Beltran	678e8a44a1	[Compass App] Swipe to delete bookings (#2440) ... This PR adds the swipe-to-delete functionality on the home screen. To properly handle this, I had to change how booking IDs work (otherwise the `Dimissable` widget would not like it). Now, IDs are generated sequentially, either by the local Bookings repository or by the server. https://github.com/user-attachments/assets/523cb786-f2ab-4c57-b241-23901eee76b1 (it's the same video I shared yesterday) ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	2 months ago
Miguel Beltran	799ce7f548	[Compass App] Cleanup and extra tests (#2437) ... Some changes to make the project ready to merge to main - Fix formatting. - Add project to the `stable` channel CI (potentially could be added for `beta` and `master`) - CI only runs when targeting `main`, so I run the command locally and it worked. - Add unit tests for the `ApiClient` and `AuthApiClient` which had no test coverage outside of integration tests. - Resolved some TODOs I left before. ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	2 months ago
Miguel Beltran	b00ce6c7b3	[Compass App] User name and profile picture (#2435) ... This PR completes the home screen, adding the username and the profile picture.   This feature follows the basic structure: - Added repository, both local and remote. - Added API call + API model. - Added Domain model (reduced version only containing name and profile picture). - Modified the ViewModel to obtain the user and expose it to the Widget. - Updated Widget to display the username and profile picture. - Added `/user` endpoint to server project. - Updated widget tests, as well as integration tests. The Compass App is basically completed with it. Maybe the next step is to merge it to the `main` branch? And then we can do a full review, remove TODOs and setup CI jobs. ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	2 months ago
Miguel Beltran	93b86b86f3	[Compass App] Refactor model (#2431) ... This PR removes the `compass_model` subproject and moves each data model class to the respective `app` or `server` project. Although this leads to code duplication, this is a more realistic implementation where clients and servers have their own respective data model class implementations. The model classes for the server are located in `server/lib/model`. Model classes for the app are located in two places: - API-only model: `app/lib/data/services/api/model`. - Domain model: `app/lib/domain/model`. In general, models located under the domain are used across the app, while the API-only models are only used for interacting with the API client. Tests have been updated. ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	2 months ago
Miguel Beltran	fb869e729e	[Compass App] Home screen with booking list (#2428) ... This PR introduces the storage and retrieval of bookings. ### Server implementation - New booking routes: - GET `/booking`: Obtain the list ofer user bookings - GET `/booking/{id}`: Obtain the specific booking object - POST `/booking`: Creates a new booking - The `BookingApiModel` objects are incomplete, the `Destination` is a reference, not the full object, and the `Activity` list are also listed as references only. - Server booking always has an existing booking created (Alaska, North America) for demo purposes. - Storage is "in memory", stopping the server deletes all stored bookings. ### New `BookingRepository` - New repository class. - Both local and remote implementations. - Converts the `BookingApiModel` into a complete `Booking` that the app can use, or a `BookingSummary` that only contains the necessary information for the home screen. ### New `LocalDataService` - Service that loads hard-coded data or from assets. ### New `HomeScreen` - Route path: `/` - Loads and displays the list of created bookings from the `BookingRepository`. - Tap on a booking title opens the `BookingScreen`. - Floating Action Button to create a new booking. ### Changes in `BookingScreen` - Can be accessed at the end of creating a booking or from the home screen when tapping a booking title. - Two commands: - `createBooking`: Takes the stored `ItineraryConfig` and creates a booking, the booking is stored to the `BookingRepository` (locally or on the server). - `loadBooking`: Takes a booking ID and loads that existing booking from the `BookingRepository`. - Simplified navigation: Once at `BookingScreen`, user can only navigate back to `HomeScreen`. - Share button converted to `FloatingActionButton` ### Integration Tests - Updated to use new home screen. - Updated to cover opening an existing booking in tests. ### TODO Next - Refactor the `compass_model` project and move data model classes to `server` and `app`, then delete project. - Implement some user information for the home screen (e.g. retrieve user name and profile picture url) ### Screencast [Screencast from 2024-09-02 16-25-25.webm](https://github.com/user-attachments/assets/8aba4a61-def6-4752-a4e5-70cbed362524) ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	3 months ago
Miguel Beltran	3be6873210	Compass App: WIP Auth logic refactor (#2394) ... This PR follows up with the conversation we had via email and cleans up the auth implementation. **New `AuthRepository`** The `AuthTokenRepository`, `AuthLoginComponent` and `AuthLogoutComponent` have been refactored into a single `AuthRepository`. This `AuthRepository` exposes the `isAuthenticated` boolean, which is used by `go_router` to handle redirects. Also, has two methods, `login(email, pass)` and `logout()`, similar to what we had in the components. The implementation uses the new `SharedPreferencesService`, which is a service to access the `shared_preferences` plugin to store the `String` token. **New `AuthApiClient`** The `ApiClient` has been split in two. The `/login` REST call is moved to the `AuthApiClient`, while the other calls that require an auth token remain in the `ApiClient`. **`ApiClient` credentials** The main open question is, what is the best way to pass the auth token to the api client? I've found several alternatives: 1. `ApiClient` has a `token` setter which the `AuthRepository` calls to set the token - Implemented in this PR. - Follows our architecture design. - `AuthRepository` should be the source of truth, but the `ApiClient.token` could be set externally by mistake, so the single source of truth principle gets blurry. 2. `ApiClient` calls to the `AuthRepository` to obtain the token. - This is what the code was doing before. - `AuthRepository` is the source of truth. - But the dependency "Service to Repository" breaks our architecture design principle. 3. `ApiClient` calls to the `SharedPreferencesService` to obtain the token ( - `SharedPreferencesService` is the source of truth, as the `ApiClient` doesn't need the `AuthRepository`. - We see a "Service calling a Service" which maybe breaks our architecture design principle? 4. The `ApiClient` doesn't hold the token at all, intead, each call requires us to pass a token. - Tried to implement it but becomes very complex. - Makes other repositories depend on the `AuthRepository` or the `SharedPreferencesService`. Personal take: I have implemented 1 in this PR because it is the one that follows best the architecture recommendations. However I see some pitfalls, e.g. the `AuthRepository` needs to fetch the token from the `SharedPreferencesService` at least once on app start and pass it to the `ApiClient`. While on the solution 2 that's never a problem, since the `AuthRepository` is being called from the `ApiClient` and so it is always the source of truth for authentication. I am looking forward for your thoughts @ericwindmill ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	3 months ago
Miguel Beltran	e0f25da42b	Compass App: Basic auth (#2385) ... This PR introduces basic auth implementation between the app and the server as part of the architectural example. This PR is a big bigger than the previous ones so I hope this explanation helps: ### Server implementation The server introduces a new endpoint `/login` to perform login requests, which accepts login requests defined in the `LoginRequest` data class, with an email and password. The login process "simulates" checking on the email and password and responds with a "token" and user ID, defined by the `LoginResponse` data class. This is a simple hard-coded check and in any way a guide on how to implement authentication, just a way to demonstrate an architectural example. The server also implements a middleware in `server/lib/middleware/auth.dart`. This checks that the requests between the app and the server carry a valid authorization token in the headers, responding with an unauthorized error otherwise. ### App implementation The app introduces the following new parts: - `AuthTokenRepository`: In charge of storing the auth token. - `AuthLoginComponent`: In charge of performing login. - `AuthLogoutComponent`: In charge of performing logout. - `LoginScreen` with `LoginViewModel`: Displays the login screen. - `LogoutButton` with `LogoutViewModel`: Displays a logout button. The `AuthTokenRepository` acts as the source of truth to decide if the user is logged in or not. If the repository contains a token, it means the user is logged in, otherwise if the token is null, it means that the user is logged out. This repository is also a `ChangeNotifier`, which allows listening to change in it. The `GoRouter` has been modified so it listens to changes in the `AuthTokenRepository` using the `refreshListenable` property. It also implements a `redirect`, so if the token is set to `null` in the repository, the router will redirect users automatically to the login screen. This follows the example found in https://github.com/flutter/packages/blob/main/packages/go_router/example/lib/redirection.dart On app start, `GoRouter` checks the `AuthTokenRepository`, if a token exists the user stays in `/`, if not, the user is redirected to `/login`. The `ApiClient` has also been modified, so it reads the stored token from the repository when performing network calls, and adds it to the auth headers. The two new components implement basic login and logout functionality. The `AuthLoginComponent` will send the request using the `ApiClient`, and then store the token from the response. The `AuthLogoutComponent` clears the stored token from the repository, and as well clears any existing itinerary configuration, effectively cleaning the app state. Performing logout redirects the user to the login screen, as explained. The `LoginScreen` uses the `AuthLoginComponent` internally, it displays two text fields and a login button, plus the application logo on top. A successful login redirects the user to `/`. The `LogoutButton` replaces the home button at the `/`, and on tap it will perform logout using the `AuthLogoutComponent`. **Development target app** The development target app works slightly different compared to the staging build. In this case, the `AuthTokenRepository` always contains a fake token, so the app believes it is always logged in. Auth is only used in the staging build when the server is involved. ## Screenshots <details> <summary>Screenshots</summary> The logout button in the top right corner:  The login screen:  </details> ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	3 months ago
Miguel Beltran	0305894b0e	Compass App: Activities screen, error handling and logs (#2371) ... This PR introduces the Activities screen, handling of errors in view models and commands, and logs using the dart `logging` package. **Activities** - The screen loads a list of activities, split in daytime and evening activities, and the user can select them. - Server adds the endpoint `/destination/<id>/activitity` which was missing before. Screencast provided: [Screencast from 2024-07-29 16-29-02.webm](https://github.com/user-attachments/assets/a56024d8-0a9c-49e7-8fd0-c895da15badc) **Error handling** _UI Error handling:_ In the screencast you can see a `SnackBar` appearing, since the "Confirm" button is not yet implemented. The `saveActivities` Command returns an error `Result.error()`, then the error state is exposed by the Command and consumed by the listener in the `ActivityScreen`, which displays a `SnackBar` and consumes the state. Functionality is similar to the one found in [UI events - Consuming events can trigger state updates](https://developer.android.com/topic/architecture/ui-layer/events#consuming-trigger-updates) from the Android architecture guide, as the command state is "consumed" and cleared. The Snackbar also includes an action to "try again". Tapping on it calls to the failed Command `execute()` so users can run the action again. For example, here the `saveActivities` command failed, so `error` is `true`. Then we call to `clearResult()` to remove the failed status, and show a `SnackBar`, with the `SnackBarAction` that runs `saveActivities` again when tapped. ```dart if (widget.viewModel.saveActivities.error) { widget.viewModel.saveActivities.clearResult(); ScaffoldMessenger.of(context).showSnackBar( SnackBar( content: const Text('Error while saving activities'), action: SnackBarAction( label: "Try again", onPressed: widget.viewModel.saveActivities.execute, ), ), ); } ``` Since commands expose `running`, `error` and `completed`, it is easy to implement loading and error indicator widgets: [Screencast from 2024-07-29 16-55-42.webm](https://github.com/user-attachments/assets/fb5772d0-7b9d-4ded-8fa2-9ce347f4d555) As side node, we can easily simulate that state by adding these lines in any of the repository implementations: ```dart await Future.delayed(Durations.extralong1); return Result.error(Exception('ERROR!')); ``` _In-code error handling:_ The project introduces the `logging` package. In the entry point `main_development.dart` the log level is configured. Then in code, a `Logger` is creaded in each View Model with the name of the class. Then the log calls are used depending on the `Result` response, some finer traces are also added. By default, they are printed to the IDE debug console, for example: ``` [SearchFormViewModel] Continents (7) loaded [SearchFormViewModel] ItineraryConfig loaded [SearchFormViewModel] Selected continent: Asia [SearchFormViewModel] Selected date range: 2024-07-30 00:00:00.000 - 2024-08-08 00:00:00.000 [SearchFormViewModel] Set guests number: 1 [SearchFormViewModel] ItineraryConfig saved ``` **Other changes** - The json files containing destinations and activities are moved into the `app/assets/` folders, and the server is querying those files instead of their own copy. This is done to avoid file duplication but we can make a copy of those assets files for the server if we decide to. **TODO Next** - I will implement the "book a trip" screen which would complete the main application flow, which should introduce a more complex "component/use case" outside a view model. ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	4 months ago
Miguel Beltran	175195eae6	Compass App: Add "Activities", "Itinerary Config" and MVVM Commands (#2366) ... Part of the WIP for the Compass App example. Merge to `compass-app`. This PR introduces: - A new feature for Activities (UI unfinished). - A repository for the current Itinerary Configuration. - A `Command` utils class to be used in View Models. **Activities** - PR adds the `compass_app/app/assets/activities.json` (large file!) - Created `ActivityRepository` with local and remote implementation. - Added `getActivitiesByDestination` to `ApiClient` - Added `Activity` data model - Created `ActivitiesScreen` and `ActivitiesViewModel`. - WIP: Decided to finish the UI later due to the size the PR was taking. - WIP: Server implementation for Activities will be completed in another PR. **Itinerary Configuration** - Created the `ItineraryConfigRepository` with an "in-memory" implementation. (local database or shared preferences could potentially be implemented too) - Refactored the way screens share data, instead of passing data using the navigator query parameters, the screens store the state (the itinerary configuration) in this repository, and load it when the screen is opened. - This allows to navigate between screens, back and forth, and keep the selection of data the user made. **Commands** - To handle button taps and other running actions. - Encapsulates an action, exposes the running state (to show progress indicators), and ensures that the action cannot execute if it is already running (to avoid multiple taps on buttons). - Two implementations included, one without arguments `Command0`, and one that supports a single argument `Command1`. - Commands also provide an `onComplete` callback, in case the UI needs to do something when the action finished running (e.g. navigate). - Tests are included. **TODO in further PRs** - Finish the Activities UI and continue implementing the app flow. - Introduce an error handling solution. - Move the data jsons into a common folder (maybe a package?) so they can be shared between app and server and don't duplicate files. **Screencast** As it can be observed, the state of the screen is recovered from the stored "itinerary config". Note: Activites screen appears empty, the list is just printed on terminal at the moment. [Screencast from 2024-07-23 10-58-40.webm](https://github.com/user-attachments/assets/54805c66-2938-48dd-8f63-a26b1e88eab6) ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	4 months ago
Miguel Beltran	be0b3dc0d1	Compass App: Add "server" dart shelf-app and "shared" dart package (#2359) ... This PR introduces two new subprojects: - `compass_server` under `compass_app/server`. - `compass_model` under `compass_app/model`. **`compass_server`** - Dart server implemented using `shelf`. - Created with the `dart create -t server-shelf` template. - Implements two REST endpoints: - `GET /continent`: Returns the list of `Continent` as JSON. - `GET /destination`: Returns the list of `Destination` as JSON. - Generated Docker files have been removed. - Implemented tests. - TODO: Implement some basic auth. **`compass_model`** - Dart package to share data model classes between the `server` and `app`. - Contains the data model classes (`Continent`, `Destination`). - Generated JSON from/To methods and data classes using `freezed`. - The sole purpose of this package is to host the data model. Other shared code should go in a different package. **Other changes** - Created an API Client to connect to the local dart server. - Created "remote" repositories, which also implement a basic in-memory caching strategy. - Created two dependency configurations, one with local repositories and one with remote repos. - Created two application main targets to select configuration: - `lib/main_development.dart` which starts the app with the "local" data configuration. - `lib/main_staging.dart` which starts the app with the "remove" (local dart server) configuration. - `lib/main.dart` still works as default entry point. - Implemented tests for remote repositories. ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	4 months ago
Miguel Beltran	496b467485	Compass App: Search form screen (#2353) ... Part of the implementation of the Compass App for the Architecture sample. **Merge to `compass-app`** This PR introduces the Search Form Screen, in which users can select a region, a date range and the number of guests. The feature is split in 5 different widgets, each one depending on the `SearchFormViewModel`. The architecture follows the same patterns implemented in the previous PR https://github.com/flutter/samples/pull/2342 TODO later on: - Error handling is yet not implemented, we need to introduce a "logger" and a way to handle error responses. - All repositories return local data, next steps include creating the dart server app. - The search query at the moment only takes the "continent" and not the dates and number of guests, that would be implemented later on as well. ## Demo [Screencast from 2024-07-12 14-30-48.webm](https://github.com/user-attachments/assets/afbcdd4e-617a-49cc-894c-8e082748e572) ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	4 months ago
Miguel Beltran	cfedff5a5c	Create compass-app first feature (#2342) ... As part of the work for the compass-app / architecture examples This PR is considerably large, so apologies for that, but as it contains the first feature there is a lot of set up work involved. Could be easier to review by opening the project on the IDE. **Merge to `compass-app` not `main`** cc. @ericwindmill ### Details #### Folder structure The project follows this folder structure: - `lib/config/`: Put here any configuration files. - `lib/config/dependencies.dart`: Configures the dependency tree (i.e. Provider) - `lib/data/models/`: Data classes - `lib/data/repositories/`: Data repositories - `lib/data/services/`: Data services (e.g. network API client) - `lib/routing`: Everything related to navigation (could be moved to `common`) - `lib/ui/core/themes`: several theming classes are here: colors, text styles and the app theme. - `lib/ui/core/ui`: widget components to use across the app - `lib/ui/<feature>/view_models`: ViewModels for the feature. - `lib/ui/<feature>/widgets`: Widgets for the feature. Unit tests also follow the same structure. #### State Management Most importantly, the project uses MVVM approach using `ChangeNotifier` with the help of Provider. This could be implemented without Provider or using any other way to inject the VM into the UI classes. #### Architecture approach - Data follows a unidirectional flow from Repository -> Usecase -> ViewModel -> Widgets -> User. - The provided data Repository is using local data from the `assets` folder, an abstract class is provided to hide this implementation detail to the Usecase, and also to allow multiple implementations in the future. ### Screenshots  ### Extra notes: - Moved the app code to the `app` folder. We need to create a `server` project eventually. ### TODO: - Integrate a logging framework instead of using `print()`. - Do proper error handling. - Improve image loading and caching. - Complete tests with edge-cases and errors. - Better Desktop UI. ## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md	4 months ago