# qb12-group1/railway-management-system architecture

> Architecture diagram of the GitHub repository qb12-group1/railway-management-system, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-06-28). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/qb12-group1/railway-management-system
- Repository: https://github.com/qb12-group1/railway-management-system

## Overview

1. **Project shape**
   - This is a **Python terminal application** for railway operations management, not a web or desktop app.
   - The repository is organized as a small layered application under `app/`, with clear boundaries between UI, orchestration, business logic, and data access.

2. **Runtime and packaging**
   - The project is managed with **uv** (`pyproject.toml`, `uv.lock`) and is intended to run as a Python package.
   - Code quality is enforced through **pre-commit**, **Ruff** (lint/format), and **Pyright** (type checking).

3. **Entry point**
   - `app/main.py` is the likely executable entry point.
   - It bootstraps the terminal app and hands control to the menu/navigation layer rather than exposing logic directly.

4. **Terminal UI layer**
   - `app/menu_controller.py` appears to coordinate screen flow and user interaction.
   - `app/menus/` contains menu abstractions:
     - `base.py` for shared menu behavior/contracts
     - `main_menu.py` for the top-level user-facing menu
   - This layer is responsible for rendering options, reading terminal input, and routing user actions.

5. **Application flow**
   - The main data flow is: **user input in terminal → menu controller → selected menu/action → service layer → repository layer → models returned/displayed**.
   - The UI layer should stay thin; it delegates real work downward rather than embedding railway rules directly.

6. **Domain model layer**
   - `app/models/` holds the core railway entities and value objects.
   - This is where the system’s business concepts live, such as trains, routes, stations, schedules, tickets, or related entities, depending on implementation.

7. **Business logic layer**
   - `app/services/` is the main place for railway operations logic.
   - This layer should coordinate rules like scheduling, allocation, validation, and operational workflows, keeping those rules out of menus and storage code.

8. **Data access boundary**
   - `app/repositories/` is the persistence abstraction.
   - The presence of a repository layer suggests the app is designed so storage can be swapped or isolated from business logic, even if the concrete backend is not visible from the tree.

9. **Shared utilities**
   - `app/utils/` is for cross-cutting helpers that do not belong to a single domain entity or service.
   - Typical responsibilities here would be formatting, parsing, validation helpers, or terminal-oriented utility functions.

10. **Package boundaries**
   - The repository uses a conventional separation:
     - `menus` = presentation/navigation
     - `services` = business rules
     - `repositories` = persistence/data access
     - `models` = domain objects
     - `utils` = shared helpers
   - This makes the architecture diagram naturally layered, with dependencies flowing downward from UI to data.

11. **What is not evident**
   - There is no visible database, API server, message queue, or external service integration in the tree.
   - So the architecture should be drawn as a **self-contained CLI application** unless later code introduces a specific persistence backend.

12. **Implementation status signal**
   - The presence of `__init__.py` files across packages indicates a deliberately structured Python package, not a loose script collection.
   - Even without source contents, the directory names strongly suggest an intentional MVC-like or layered architecture adapted to a terminal workflow.

Main entry points: [`app/services`](https://github.com/qb12-group1/railway-management-system/tree/main/app/services) (Services), [`app/menu_controller.py`](https://github.com/qb12-group1/railway-management-system/blob/main/app/menu_controller.py) (Menu Ctrl), [`app/menus/main_menu.py`](https://github.com/qb12-group1/railway-management-system/blob/main/app/menus/main_menu.py) (Main Menu), [`pyproject.toml`](https://github.com/qb12-group1/railway-management-system/blob/main/pyproject.toml) (Pyproject)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_group_presentation["Presentation"]
  node_app_main["Main<br/>entrypoint<br/>[main.py]"]
  node_menu_controller["Menu Ctrl<br/>navigation<br/>[menu_controller.py]"]
  node_menus_base["Menu Base<br/>abstraction<br/>[base.py]"]
  node_menus_main["Main Menu<br/>screen<br/>[main_menu.py]"]
end

subgraph group_group_core["Core"]
  node_services{{"Services<br/>business logic"}}
  node_models{{"Models<br/>domain model"}}
  node_repositories{{"Repositories<br/>data access"}}
  node_utils{{"Utils<br/>shared helpers"}}
end

subgraph group_group_tooling["Tooling"]
  node_pyproject["Pyproject<br/>package config<br/>[pyproject.toml]"]
  node_uv_lock["UV Lock<br/>dependency lock<br/>[uv.lock]"]
  node_precommit["Pre-commit<br/>quality config"]
end

node_app_main -->|"starts"| node_menu_controller
node_menu_controller -->|"uses"| node_menus_base
node_menu_controller -->|"shows"| node_menus_main
node_menus_main -->|"calls"| node_services
node_services -->|"returns"| node_models
node_services -->|"persists"| node_repositories
node_repositories -->|"stores"| node_models
node_services -.->|"shares"| node_utils
node_menus_main -.->|"formats"| node_utils
node_pyproject -.->|"packages"| node_app_main
node_uv_lock -.->|"pins"| node_pyproject
node_precommit -.->|"checks"| node_pyproject

click node_app_main "https://github.com/qb12-group1/railway-management-system/blob/main/app/main.py"
click node_menu_controller "https://github.com/qb12-group1/railway-management-system/blob/main/app/menu_controller.py"
click node_menus_base "https://github.com/qb12-group1/railway-management-system/blob/main/app/menus/base.py"
click node_menus_main "https://github.com/qb12-group1/railway-management-system/blob/main/app/menus/main_menu.py"
click node_services "https://github.com/qb12-group1/railway-management-system/tree/main/app/services"
click node_models "https://github.com/qb12-group1/railway-management-system/tree/main/app/models"
click node_repositories "https://github.com/qb12-group1/railway-management-system/tree/main/app/repositories"
click node_utils "https://github.com/qb12-group1/railway-management-system/tree/main/app/utils"
click node_pyproject "https://github.com/qb12-group1/railway-management-system/blob/main/pyproject.toml"
click node_uv_lock "https://github.com/qb12-group1/railway-management-system/blob/main/uv.lock"
click node_precommit "https://github.com/qb12-group1/railway-management-system/blob/main/.pre-commit-config.yaml"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_app_main,node_menu_controller,node_menus_base,node_menus_main toneBlue
class node_services,node_models,node_repositories,node_utils toneAmber
class node_pyproject,node_uv_lock,node_precommit toneMint
```

## Components

### Presentation

Terminal UI, menu flow, and app entry

- [Main](https://github.com/qb12-group1/railway-management-system/blob/main/app/main.py): entrypoint · Bootstraps the terminal application and hands off to menu flow · `app/main.py`
- [Menu Ctrl](https://github.com/qb12-group1/railway-management-system/blob/main/app/menu_controller.py): navigation · Coordinates screen flow and user actions in the terminal · `app/menu_controller.py`
- [Menu Base](https://github.com/qb12-group1/railway-management-system/blob/main/app/menus/base.py): abstraction · Shared menu contracts and behavior · `app/menus/base.py`
- [Main Menu](https://github.com/qb12-group1/railway-management-system/blob/main/app/menus/main_menu.py): screen · Top-level user-facing menu · `app/menus/main_menu.py`

### Core

Domain objects, business rules, and persistence boundary

- [Services](https://github.com/qb12-group1/railway-management-system/tree/main/app/services): business logic · Railway operations rules and workflows · `app/services`
- [Models](https://github.com/qb12-group1/railway-management-system/tree/main/app/models): domain model · Core railway entities and value objects · `app/models`
- [Repositories](https://github.com/qb12-group1/railway-management-system/tree/main/app/repositories): data access · Persistence abstraction for storing and loading state · `app/repositories`
- [Utils](https://github.com/qb12-group1/railway-management-system/tree/main/app/utils): shared helpers · Cross-cutting helpers used across layers · `app/utils`

### Tooling

Packaging and code quality support

- [Pyproject](https://github.com/qb12-group1/railway-management-system/blob/main/pyproject.toml): package config · Project metadata, dependencies, and package settings · `pyproject.toml`
- [UV Lock](https://github.com/qb12-group1/railway-management-system/blob/main/uv.lock): dependency lock · Pinned dependency resolution for uv · `uv.lock`
- [Pre-commit](https://github.com/qb12-group1/railway-management-system/blob/main/.pre-commit-config.yaml): quality config · Repository hooks for linting and formatting · `.pre-commit-config.yaml`

## Connections

- Main → Menu Ctrl: starts · Entry point launches the menu orchestration layer
- Menu Ctrl → Menu Base: uses · Controller relies on shared menu contracts
- Menu Ctrl → Main Menu: shows · Controller routes into the top-level menu
- Main Menu → Services: calls · Menu actions delegate work to business logic
- Services → Models: returns · Business logic operates on domain entities
- Services → Repositories: persists · Services coordinate loading and saving through repositories
- Repositories → Models: stores · Persistence boundary works with domain objects
- Services → Utils: shares · Services can use common helper functions
- Main Menu → Utils: formats · UI layer can use shared helpers for terminal presentation
- Pyproject → Main: packages · Project config defines the runnable package
- UV Lock → Pyproject: pins · Lockfile captures dependency resolution from project config
- Pre-commit → Pyproject: checks · Repository hooks support code quality for the package