# workmanager_aurora

The Aurora implementation of the [workmanager](https://pub.dev/packages/workmanager).

## Features

- registerOneOffTask
- registerPeriodicTask
- cancelByUniqueName
- cancelByTag
- cancelAll

## Limitations

1. Dart entry point for handling tasks should be called `callbackDispatcher`.
2. One-off tasks do not try to restart on error (no backoff support).
3. The constraints are set in the application's desktop file, not through the dart code.
4. Initial delay in periodic tasks is not supported.
5. Periodic tasks are started immediately upon registration.
7. Minimum frequency of periodic tasks is 15 minutes.

## Usage

This package is not an _endorsed_ implementation of `workmanager`.
Therefore, you have to include `workmanager_aurora` alongside `workmanager` as dependencies in your `pubspec.yaml` file.

**pubspec.yaml**

```yaml
dependencies:
  workmanager: ^0.5.2
  workmanager_aurora:
    git:
      url: https://gitlab.com/omprussia/flutter/flutter-community-plugins/workmanager_aurora.git
      ref: aurora-0.0.1
```

**CMakeLists.txt**

```
find_package(Qt5 COMPONENTS Core REQUIRED)
target_link_libraries(${BINARY_NAME} PRIVATE Qt5::Core)
```

***main.cpp**

```desktop
#include <flutter/application.h>
#include <flutter/flutter_compatibility_qt.h> // <- Enable Qt

#include "generated_plugin_registrant.h"

int main(int argc, char *argv[]) {
    aurora::Initialize(argc, argv);
    aurora::EnableQtCompatibility(); // <- Enable Qt
    aurora::RegisterPlugins();
    aurora::Launch();
    return 0;
}
```

***.desktop**

In Aurora OS, background tasks need to be declared in a desktop file.

The mandatory field is `Type`, where you should specify `worker` for one-of tasks and `periodic` for periodic tasks.

You can also optionally specify the permissions that your background task needs through an enumeration in the `Permissions` field.

```desktop
[X-Task <ONE_OF_TASK_NAME>]
Type=worker
Permissions=

[X-Task <PERIODIC_TASK_NAME>]
Type=periodic
Permissions=Location
```

You can also optionally specify the conditions of the background task. For example, if your background task requires the Internet, you can specify the following in the `Conditions` field:

```desktop
[X-Task <PERIODIC_TASK_WITH_INTERNET_NAME>]
Type=periodic
Permissions=Internet
Conditions=internet
```

***.spec**

```spec
BuildRequires: pkgconfig(appdir-cpp)
BuildRequires: pkgconfig(runtime-manager-qt5)
BuildRequires: pkgconfig(nemonotifications-qt5)
```

***.dart**

```dart
import 'package:workmanager/workmanager.dart';

@pragma('vm:entry-point')
void callbackDispatcher() {
  Workmanager().executeTask((task, inputData) {
    switch (task) {
      case "SimpleTask":
        print("Background task started: $task");
        break;
      default:
        return Future.value(false);
    }

    return Future.value(true);
  });
}

void main() {
  WidgetsFlutterBinding.ensureInitialized();

  Workmanager().initialize(callbackDispatcher, isInDebugMode: true);
  Workmanager().registerOneOffTask("unique-task-id", "SimpleTask");

  runApp(MyApp());
}
```