### Run Example App

Source: https://github.com/java-james/sm2/blob/master/README.md

Instructions to navigate to the example directory and run the Flutter example app to interactively test the spaced repetition algorithm.

```sh
cd example
flutter run
```

--------------------------------

### Flutter Example App Analysis and Testing

Source: https://github.com/java-james/sm2/blob/master/README.md

Commands to analyze code quality and run tests for the Flutter example application.

```sh
cd example
flutter analyze
flutter test
```

--------------------------------

### Calculate next review interval (Quick Start)

Source: https://github.com/java-james/sm2/blob/master/README.md

Demonstrates the basic usage of the Sm2 class to calculate the next review interval, repetitions, and ease factor based on recall quality and previous state.

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

void main() {
  final result = Sm2().calc(
    quality: 5,
    repetitions: 0,
    previousInterval: 0,
    previousEaseFactor: 2.5,
  );

  print(result.interval); // 1
  print(result.repetitions); // 1
  print(result.easeFactor); // 2.6
}
```

--------------------------------

### Install spaced_repetition for Dart

Source: https://github.com/java-james/sm2/blob/master/README.md

Add the spaced_repetition package to your Dart project dependencies.

```sh
dart pub add spaced_repetition
```

--------------------------------

### Install spaced_repetition for Flutter

Source: https://github.com/java-james/sm2/blob/master/README.md

Add the spaced_repetition package to your Flutter project dependencies.

```sh
flutter pub add spaced_repetition
```

--------------------------------

### Development Analysis and Testing

Source: https://github.com/java-james/sm2/blob/master/README.md

Commands to analyze code quality and run tests for the Dart package.

```sh
dart analyze
dart test
```

--------------------------------

### SM-2 Algorithm Behavior - Ease Factor Update

Source: https://github.com/java-james/sm2/blob/master/README.md

Illustrates the formula used to update the ease factor after each review, which is crucial for adjusting future intervals based on recall performance.

```dart
easeFactor = previousEaseFactor +
    (0.1 - (5 - quality) * (0.08 + (5 - quality) * 0.02));
```

--------------------------------

### Update card state after review

Source: https://github.com/java-james/sm2/blob/master/README.md

Shows how to use the result of Sm2().calc to update the card's interval, repetitions, ease factor, and due date for the next review.

```dart
final next = Sm2().calc(
  quality: userScore,
  repetitions: card.repetitions,
  previousInterval: card.interval,
  previousEaseFactor: card.easeFactor,
);

card
  ..interval = next.interval
  ..repetitions = next.repetitions
  ..easeFactor = next.easeFactor
  ..dueAt = DateTime.now().add(Duration(days: next.interval));
```

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