# 🧙‍♂️ Workshop: Hogwarts School System - A Magical OOP Adventure

## Welcome, Young Wizard!

> *"The sorting hat has placed you in Gryffindor... No, wait! It placed you in the **Java Development** house!"*

Welcome to the **Hogwarts School System** workshop! This magical journey will help you master the fundamentals of **Object-Oriented Programming (OOP)** through a fun, wizard-themed project.

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## 🎯 Workshop Objectives

By completing this workshop, you will learn and practice:

| Concept | How it's used in this project |
|---------|-------------------------------|
| **Encapsulation** | Private fields with public getters/setters |
| **Inheritance** | `Student` and `Teacher` extend `User` |
| **Polymorphism** | Different user types with same methods |
| **Abstraction** | Abstract `User` class with common behavior |
| **Lists & Collections** | Managing students, teachers, and courses with `ArrayList` |
| **Input Validation** | Validating usernames and passwords |
| **ID-based Selection** | Finding courses by unique ID instead of name |

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## 🏰 Storyline

*Professor Dumbledore has asked you to help modernize Hogwarts! The old parchment-based course enrollment system is a disaster. Students keep signing up for the wrong classes, and Professor Snape is furious because his Potions class is full of first-year students who can't tell a bezoar from a newt's eye.*

*Your mission: Build a digital School Management System that allows:*

- *Students to view available courses and enroll using magical Course IDs*
- *Teachers to create new courses and manage their classes*
- *Everyone to log in securely (even Filch needs to check who's where)*

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## 📚 Class Hierarchy Diagram
        ┌─────────────────┐
        │ User            │
        │ (Abstract)      │
        └────────┬────────┘
                 │
  ┌──────────────┴──────────────┐
  │                             │
┌─────▼─────┐             ┌─────▼─────┐
│ Student   │             │   Teacher │
└─────┬─────┘             └─────┬─────┘
      │                         │
┌─────▼─────┐             ┌─────▼─────┐
│enrolled   │             │ myCourses │
│ Courses   │             │   (List)  │
└───────────┘             └───────────┘

┌─────────────────┐
│ Course          │
├─────────────────┤
│ - id (static)   │
│ - name          │
│ - teacher       │     
│ - students      │
└─────────────────┘
       │
       │ contains
       ▼
┌─────────────────┐
│ SchoolSystem    │
│ (Service)       │
└─────────────────┘
   
---





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## 📋 Complete TODO List

### 🔧 Student.java (3 TODOs)

| # | Method | Description |
|---|--------|-------------|
| 1 | `enrollInCourse(Course course)` | Register student in a course |
| 2 | `showMyCourses()` | Display all enrolled courses |
| 3 | `getEnrolledCourses()` | Return list of enrolled courses |

### 🔧 SchoolSystem.java (5 TODOs)

| # | Method | Description |
|---|--------|-------------|
| 4 | `registerStudent(String username, String password)` | Register new student |
| 5 | `loginStudent(String username, String password)` | Student login |
| 6 | `findStudent(String username)` | Find student by username (private) |
| 7 | `addCourseToSystem(String courseName)` | Add new course to system |
| 8 | `findCourseById(int id)` | Find course by ID |

### 🔧 Main.java (4 TODOs)

| # | Location | Description |
|---|----------|-------------|
| 9 | `registerMenu()` - case 1 | Student registration |
| 10 | `loginMenu()` - case 1 | Student login |
| 11 | `studentMenu()` - case 3 | Show my courses |
| 12 | `enrollInCourse(Student student)` | Enroll logic |

### 📊 Summary

| File | TODO Count |
|------|------------|
| Student.java | 3 |
| SchoolSystem.java | 5 |
| Main.java | 4 |
| **Total** | **12** |

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## ℹ️ Note

> This exercise is for practice only and has no bouns.  
> Students can complete it in class with TA assistance.

**Good luck, young wizard!** ✨