https://github.com/tsinis/sealed_world

Dart-written, Flutter-powered, and ISO-backed ecosystem for the world's data in the form of compile-time, tree-shakable constant classes with a sealed origin 🌍
https://github.com/tsinis/sealed_world

countries country-flags currencies dart declarative-country-flags declarative-flags flags flutter iso iso-15924 iso-3166 iso-4217 iso-639 languages scripts

Last synced: about 2 months ago
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Dart-written, Flutter-powered, and ISO-backed ecosystem for the world's data in the form of compile-time, tree-shakable constant classes with a sealed origin 🌍

Host: GitHub
URL: https://github.com/tsinis/sealed_world
Owner: tsinis
License: mit
Created: 2023-01-02T19:03:14.000Z (almost 3 years ago)
Default Branch: main
Last Pushed: 2025-08-24T09:56:59.000Z (about 2 months ago)
Last Synced: 2025-08-24T15:46:26.043Z (about 2 months ago)
Topics: countries, country-flags, currencies, dart, declarative-country-flags, declarative-flags, flags, flutter, iso, iso-15924, iso-3166, iso-4217, iso-639, languages, scripts
Language: Dart
Homepage: https://tsin.is/sealed_world/
Size: 312 MB
Stars: 54
Watchers: 2
Forks: 5
Open Issues: 3
Metadata Files:
- Readme: .github/readme.md
- Contributing: .github/contributing.md
- License: LICENSE
- Code of conduct: .github/code_of_conduct.md
- Codeowners: .github/CODEOWNERS
- Security: .github/security.md

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## Sealed World

A pure Dart, fully tested and ISO-driven ecosystem for the world's data in the form of compile-time, tree-shakable constant classes with a sealed origin.

[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/tsinis/sealed_world?hide_repo_select=true&ref=main)



 

> [!TIP]

> Flutter packages use **world** prefix, Dart packages use **sealed** prefix for core functionality and **l10n** prefix for localization maps.

| Package                                                                                          | SDK         | Stand-alone   | Description                              | Pub                                                                                                          |

| ------------------------------------------------------------------------------------------------ | ----------- | ------------- | ---------------------------------------- | ------------------------------------------------------------------------------------------------------------ |

| [world_countries](https://github.com/tsinis/sealed_world/tree/main/packages/world_countries)     | **Flutter** | No            | Pickers and APIs for typed localizations | [![pub.dev](https://img.shields.io/pub/v/world_countries.svg)](https://pub.dev/packages/world_countries)     |

| [world_flags](https://github.com/tsinis/sealed_world/tree/main/packages/world_flags)             | **Flutter** | No            | Country flags built with CustomPainters  | [![pub.dev](https://img.shields.io/pub/v/world_flags.svg)](https://pub.dev/packages/world_flags)             |

| [sealed_countries](https://github.com/tsinis/sealed_world/tree/main/packages/sealed_countries)   | Dart        | No            | Countries in the form of sealed classes  | [![pub.dev](https://img.shields.io/pub/v/sealed_countries.svg)](https://pub.dev/packages/sealed_countries)   |

| [sealed_currencies](https://github.com/tsinis/sealed_world/tree/main/packages/sealed_currencies) | Dart        | No            | Currencies in the form of sealed classes | [![pub.dev](https://img.shields.io/pub/v/sealed_currencies.svg)](https://pub.dev/packages/sealed_currencies) |

| [sealed_languages](https://github.com/tsinis/sealed_world/tree/main/packages/sealed_languages)   | Dart        | Partially[^1] | Languages in the form of sealed classes  | [![pub.dev](https://img.shields.io/pub/v/sealed_languages.svg)](https://pub.dev/packages/sealed_languages)   |

| [l10n_countries](https://github.com/tsinis/sealed_world/tree/main/packages/l10n_countries)       | Dart        | **Yes**       | Country names localization maps          | [![pub.dev](https://img.shields.io/pub/v/l10n_countries.svg)](https://pub.dev/packages/l10n_countries)       |

| [l10n_currencies](https://github.com/tsinis/sealed_world/tree/main/packages/l10n_currencies)     | Dart        | **Yes**       | Currency names localization maps         | [![pub.dev](https://img.shields.io/pub/v/l10n_currencies.svg)](https://pub.dev/packages/l10n_currencies)     |

| [l10n_languages](https://github.com/tsinis/sealed_world/tree/main/packages/l10n_languages)       | Dart        | **Yes**       | Language names localization maps         | [![pub.dev](https://img.shields.io/pub/v/l10n_languages.svg)](https://pub.dev/packages/l10n_languages)       |

**This ecosystem follows a hierarchical structure** with optional localization support. At the foundation are **languages and scripts**, providing core functionality across all packages. Building upon this, **currencies** extend the system, followed by **countries**. Each core package has an optional **l10n** companion that provides localization maps. The **countries** package serves as a bridge to Flutter, enabling the rendering of country **flags**, which the **world_countries** package uses to create UI components like country pickers with localized names and visual elements.

```mermaid

graph TB

    %% Sealed packages

    sealed_languages["sealed_languages"]

    sealed_currencies["sealed_currencies"]

    sealed_countries["sealed_countries"]

    %% l10n packages

    l10n_languages["l10n_languages"]

    l10n_currencies["l10n_currencies"]

    l10n_countries["l10n_countries"]

    %% World packages

    world_flags["world_flags"]

    world_countries["world_countries"]

    %% Main chain, labeled arrow for Flutter

    sealed_languages --> sealed_currencies --> sealed_countries -->| ― Flutter ― | world_flags --> world_countries

    %% l10n packages pointing to each sealed package

    l10n_languages --> sealed_languages

    l10n_currencies --> sealed_currencies

    l10n_countries --> sealed_countries

    %% Styles for sealed (light fill) and world packages (darker border)

    style sealed_languages fill:#aec7e8,stroke:#aec7e8,stroke-width:2px,fill-opacity:0.2,rx:10,ry:10

    style sealed_currencies fill:#aec7e8,stroke:#aec7e8,stroke-width:2px,fill-opacity:0.2,rx:10,ry:10

    style sealed_countries fill:#aec7e8,stroke:#aec7e8,stroke-width:2px,fill-opacity:0.2,rx:10,ry:10

    style world_flags fill:#aec7e8,stroke:#0050B9,stroke-width:2px,fill-opacity:0.5,rx:10,ry:10

    style world_countries fill:#aec7e8,stroke:#0050B9,stroke-width:2px,fill-opacity:0.5,rx:10,ry:10

    %% Styles for l10n packages (turquoise fill)

    style l10n_languages fill:#40DBE0BE,stroke:#aec7e8,stroke-width:2px,fill-opacity:0.2,rx:10,ry:10

    style l10n_currencies fill:#40DBE0BE,stroke:#aec7e8,stroke-width:2px,fill-opacity:0.2,rx:10,ry:10

    style l10n_countries fill:#40DBE0BE,stroke:#aec7e8,stroke-width:2px,fill-opacity:0.2,rx:10,ry:10

    %% Attempt to remove the label background only on the "Flutter" arrow (link index 2).

    linkStyle 2 stroke:#0050B9,stroke-width:2px,color:#000,fill:none

    %% Clickable links

    click sealed_languages "https://github.com/tsinis/sealed_world/tree/main/packages/sealed_languages"

    click sealed_currencies "https://github.com/tsinis/sealed_world/tree/main/packages/sealed_currencies"

    click sealed_countries "https://github.com/tsinis/sealed_world/tree/main/packages/sealed_countries"

    click l10n_languages "https://github.com/tsinis/sealed_world/tree/main/packages/l10n_languages"

    click l10n_currencies "https://github.com/tsinis/sealed_world/tree/main/packages/l10n_currencies"

    click l10n_countries "https://github.com/tsinis/sealed_world/tree/main/packages/l10n_countries"

    click world_flags "https://github.com/tsinis/sealed_world/tree/main/packages/world_flags"

    click world_countries "https://github.com/tsinis/sealed_world/tree/main/packages/world_countries"

```

[^1]: While `sealed_languages` technically depends on `l10n_languages` for localization, this is not part of its core functionality. The package primarily serves as the backbone for all `sealed_*` and `world_*` packages by providing typed locale classes and extensions that power localization maps across the entire ecosystem.

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