HihaArvio (Sleeve Estimate)

A playful Finnish take on agile estimation through shake gestures. Instead of pointing, just shake your device and get a hilariously honest estimate pulled straight from your sleeve (hiha).

🎯 What is HihaArvio?

"Hiha-arvio" literally means "sleeve estimate" in Finnish - those quick, informal estimates you pull out of thin air (or your sleeve) when someone asks "how long will this take?" This app embraces that chaos with a gesture-based estimation tool. Just shake your device and discover what estimate emerges from your sleeve.

✨ Features

• Shake-Based Estimation: Physical gesture drives estimate generation
• Multiple Modes:
  • Work: Professional estimates (minutes, hours, days, weeks)
  • Generic: General time frames
  • Humorous: For when reality needs a laugh track
• Estimation History: Track all your sleeve estimates with timestamps
• Persistent Settings: Your preferred mode and history size saved locally
• Cross-Platform: iOS and macOS (via Catalyst) native apps
• Offline-First: No internet required, all data stored locally

🏗️ Architecture

Built with .NET 8 MAUI using modern C# 12 and strict MVVM architecture:

• Models: Core domain models (EstimateResult, ShakeData, AppSettings)
• Services: Business logic layer
  • EstimateService: Generates estimates based on shake intensity
  • ShakeDetectionService: Processes accelerometer data
  • StorageService: SQLite persistence
  • AccelerometerService: Platform-specific sensor access
• ViewModels: Presentation layer with CommunityToolkit.Mvvm
• Views: XAML-based UI with data binding

Technology Stack

• .NET 8.0 with C# 12
• MAUI for cross-platform UI
• CommunityToolkit.Mvvm for MVVM patterns
• SQLite (sqlite-net-pcl) for local storage
• xUnit + FluentAssertions + NSubstitute for testing

🧪 Testing

189 tests covering all layers:

• 48 tests: Models layer
• 71 tests: Services layer
• 46 tests: ViewModels layer
• 24 tests: Platform-specific accelerometer implementations

# Run all tests
dotnet test HihaArvio.sln -f net8.0

# Run with detailed output
dotnet test HihaArvio.sln -f net8.0 --verbosity detailed

# Generate coverage report
dotnet test HihaArvio.sln -f net8.0 --collect:"XPlat Code Coverage"

🚀 Getting Started

Prerequisites

• .NET 8 SDK: Download here
• MAUI Workload: Install via dotnet workload install maui
• Xcode 15+: Required for iOS/macOS builds (macOS only)
• Visual Studio 2022 or VS Code with C# extension

Installation

# Clone the repository
git clone https://github.com/ivuorinen/hiha-arvio.git
cd hiha-arvio

# Restore dependencies
dotnet restore HihaArvio.sln

# Build the solution
dotnet build HihaArvio.sln -c Release

# Run tests
dotnet test HihaArvio.sln -f net8.0

Running the App

# iOS Simulator
dotnet build src/HihaArvio/HihaArvio.csproj -f net8.0-ios -c Debug
# Then deploy via Xcode or Visual Studio

# macOS Catalyst
dotnet build src/HihaArvio/HihaArvio.csproj -f net8.0-maccatalyst -c Debug
# Then run the .app bundle from bin/Debug/net8.0-maccatalyst/

📦 CI/CD Workflows

Three automated workflows handle testing, building, and publishing:

🧪 Test Workflow

• Runs on every push/PR to main or develop
• Executes all 189 tests on Ubuntu runner
• Publishes test results and artifacts

🏗️ Build Workflow

• Builds for iOS and macOS Catalyst in parallel
• Runs on macOS-14 runners (Apple Silicon)
• Uploads build artifacts for review

🚀 Publish Workflow

• Triggered by version tags (v1.0.0, v1.2.3-beta)
• Creates GitHub releases with changelogs
• Builds and publishes iOS and macOS distributions
• Supports manual workflow dispatch

See .github/workflows/README.md for detailed documentation.

📱 Supported Platforms

• iOS: 15.0+ (iPhone and iPad)
• macOS: 12.0+ (Monterey and later via Mac Catalyst)

Future platforms:

• Web/Blazor: Planned
• Android: Possible with MAUI support

🎮 How to Use

1. Launch the app on iOS or macOS
2. Shake your device to generate an estimate
3. View your estimate displayed prominently
4. Check history to review past sleeve estimates
5. Adjust settings to change estimation mode or history size
6. Experiment with different shake styles and discover what emerges!

🧬 Project Structure

hiha-arvio/
├── src/
│   └── HihaArvio/                 # Main application
│       ├── Models/                # Domain models
│       ├── Services/              # Business logic
│       │   ├── Interfaces/       # Service contracts
│       │   └── Platform/         # Platform-specific implementations
│       ├── ViewModels/           # Presentation layer
│       ├── Views/                # XAML UI
│       ├── Converters/           # Value converters
│       └── Resources/            # Images, fonts, assets
├── tests/
│   └── HihaArvio.Tests/          # All tests
│       ├── Models/               # Model tests
│       ├── Services/             # Service tests
│       ├── ViewModels/           # ViewModel tests
│       └── Integration/          # Integration tests
├── .github/
│   └── workflows/                # CI/CD workflows
└── CLAUDE.md                     # Development documentation

🔧 Development

Code Quality Standards

• ✅ 0 warnings, 0 errors policy enforced
• ✅ TDD approach for all features
• ✅ MVVM architecture strictly followed
• ✅ Dependency injection throughout
• ✅ Nullable reference types enabled
• ✅ C# 12 with modern language features

Building for Release

# iOS
dotnet publish src/HihaArvio/HihaArvio.csproj \
  -f net8.0-ios \
  -c Release \
  /p:ArchiveOnBuild=true

# macOS Catalyst
dotnet publish src/HihaArvio/HihaArvio.csproj \
  -f net8.0-maccatalyst \
  -c Release \
  /p:ArchiveOnBuild=true

Creating a Release

# Tag the release
git tag v1.0.0
git push origin v1.0.0

# GitHub Actions will automatically:
# 1. Create a GitHub release
# 2. Build iOS and macOS versions
# 3. Upload distribution artifacts

📚 Documentation

• CLAUDE.md: Detailed development documentation
• .github/workflows/README.md: CI/CD workflow documentation
• Code Comments: Inline documentation throughout the codebase

🤝 Contributing

This is a personal project demonstrating TDD and MVVM patterns with .NET MAUI. Contributions are welcome!

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Write tests first (TDD approach)
4. Implement the feature
5. Ensure all tests pass and no warnings
6. Commit your changes (git commit -m 'feat: add amazing feature')
7. Push to the branch (git push origin feature/amazing-feature)
8. Open a Pull Request

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Built with .NET MAUI
• MVVM powered by CommunityToolkit.Mvvm
• Testing with xUnit, FluentAssertions, and NSubstitute

🎭 Why "HihaArvio"?

In Finnish software development culture, "hiha-arvio" (sleeve estimate) is a tongue-in-cheek term for those quick estimates developers give when pressed for a timeline. This app celebrates that tradition by literally pulling estimates out of thin air - or rather, from the intensity of your shake gesture.

Perfect for:

• Sprint planning with a sense of humor
• Teaching the chaos of estimation
• Demonstrating .NET MAUI capabilities
• Having fun with accelerometer APIs
• Embracing Finnish developer culture

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Bundle ID: net.ivuorinen.HihaArvio Version: 1.0 Platforms: iOS 15.0+, macOS 12.0+