NanoGraph

NanoGraph is a desktop academic management application built with JavaFX. It is designed for students who need a centralized tool to organize their coursework, track assignments, take notes, and manage study sessions using the Pomodoro technique.

The application uses a retro-inspired visual theme with the "Press Start 2P" pixel font and a dark color palette, giving it a distinctive and focused aesthetic that reduces visual fatigue during long study sessions.

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Features

User Authentication

• Registration and login system with email-based credentials.
• Persistent local sessions: the application remembers the logged-in user between launches, eliminating the need to re-enter credentials each time.
• Session management with logout functionality.

Dashboard

• Central hub displaying all registered subjects (materias) and a summary of pending tasks.
• Hover tooltips on each subject show a quick breakdown of pending tasks and saved notes.
• Context menu on subjects allows deletion with confirmation dialogs.
• Quick navigation buttons to all application modules.

Task Management (Tareas)

• Full CRUD operations for tasks within each subject.
• Each task includes a title, description, and due date.
• Tasks can be marked as completed or pending.
• Filtered views per subject using a dropdown selector.
• Context menu for editing and deleting individual tasks.

Notes (Notas)

• Create, read, update, and delete notes organized by subject.
• Each note has a title and a free-text content field.
• Notes are loaded asynchronously per subject.
• Context menu with edit and delete options.

Pomodoro Timer

• Configurable study timer with a default duration of 25 minutes (minimum 10 minutes).
• Start, pause, and reset controls.
• Automatic session logging: when a timer completes, the session is saved to the database with its duration and associated subject.
• Session history per subject with delete support.

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Architecture

The project follows the MVC (Model-View-Controller) pattern:

src/
  Application/     Entry point (Main.java)
  model/           Data models (Usuario, Materia, Tarea, Nota, SesionPomodoro, Contenido)
  view/            FXML layouts and CSS stylesheet
  controller/      JavaFX controllers for each view
  dao/             Data Access Objects with Supabase REST API integration
    interfaces/    DAO interface contracts
  util/            Utility classes (navigation, alerts, session, configuration)
  assets/          Fonts and static resources

Data Models

• Contenido -- Abstract base class for content types. Holds common fields: id, creation date, and subject reference.
• Tarea -- Extends Contenido. Represents a task with title, description, due date, and completion status.
• Nota -- Extends Contenido. Represents a note with title and free-text content.
• Materia -- Represents an academic subject with a name, color code, and owner reference.
• SesionPomodoro -- Represents a completed Pomodoro session with duration and date.
• Usuario -- Represents a registered user with name, email, and registration date.

Data Layer

All persistence is handled through Supabase, a hosted PostgreSQL backend accessed via its REST API. The SupabaseClient class implements a singleton HTTP client that handles GET, POST, PATCH, and DELETE operations against the Supabase endpoint. Each model has a corresponding DAO class that serializes and deserializes JSON manually using org.json.

View Layer

The interface is built with FXML layouts styled through a unified CSS stylesheet. The visual theme uses the following color palette:

Role	Color
Background	#1E1E2E
Base surfaces	#4A4262
Accent/Hover	#A78BFA
Active/Light	#FDE047
Text	#F5F5F7

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Technology Stack

Component	Technology
Language	Java
UI Framework	JavaFX with FXML
Styling	CSS (JavaFX dialect)
Font	Press Start 2P (bundled .ttf)
Backend	Supabase (PostgreSQL + REST)
HTTP Client	java.net.http (Java 11+)
JSON Parsing	org.json
IDE	Eclipse

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Prerequisites

• Java 11 or higher.
• JavaFX SDK (if not bundled with your JDK distribution).
• A Supabase project with the required tables configured (usuarios, materias, tareas, notas, sesiones_pomodoro).
• The org.json library available in the classpath.

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Configuration

Database connection settings are located in src/util/SupabaseConfig.java. Update the following constants with your own Supabase project credentials before running:

public static final String SUPABASE_URL = "https://your-project.supabase.co";
public static final String SUPABASE_KEY = "your-anon-key";

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Running the Application

1. Open the project in Eclipse (or any Java IDE with JavaFX support).
2. Ensure JavaFX and org.json are in the build path.
3. Run Application.Main as a Java application.
4. The application starts at 800x600 and opens either the login screen or the dashboard, depending on whether a saved session exists.

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License

This project does not currently specify a license. All rights reserved by the author.