Based on your school scheduling system project, here's what the **API** would be:

## **API Architecture for Your School Scheduling System**

```python
# The API is the "Application Programming Interface" - it's how different parts
# of your system communicate with each other and with external applications

## **WHAT IS THE API IN YOUR PROJECT?**

In your project, the API serves as the **middle layer** between:
1. Your Telegram bot / Web interface
2. Your SQLite database
3. Future mobile apps or parent portals

## **API COMPONENTS:**

### **1. Database API Layer**
```python
# File: api/database.py
class DatabaseAPI:
    """API to interact with SQLite database"""
    
    def get_student_schedule(self, student_id):
        """API method to get student schedule from database"""
        # Connects to SQLite, runs query, returns JSON
        pass
    
    def find_student_location(self, student_name, time):
        """API to find where a student is at specific time"""
        pass
    
    def get_teacher_schedule(self, teacher_id):
        """API for teacher schedule queries"""
        pass
```

### **2. Telegram Bot API Integration**
```python
# File: api/telegram_bot.py
class TelegramBotAPI:
    """API that connects Telegram bot commands to database"""
    
    def handle_whereis_command(self, student_name):
        """When user types /whereis, this API method is called"""
        # 1. Receive command from Telegram
        # 2. Call DatabaseAPI.find_student_location()
        # 3. Format response for Telegram
        # 4. Send back to user
        pass
    
    def handle_schedule_command(self, student_name):
        """API for /schedule command"""
        pass
```

### **3. Web API (REST API)**
```python
# File: api/web_api.py
# This would be built with Flask or FastAPI

# Example API endpoints:
# GET /api/students/{id}/schedule      - Get student schedule
# GET /api/teachers/{id}/classes       - Get teacher classes  
# GET /api/rooms/availability          - Check room availability
# POST /api/schedule/update            - Update schedule (admin)
```

## **HOW THE API WORKS IN YOUR SYSTEM:**

```
User Types: /whereis София
    ↓
Telegram Bot (Frontend)
    ↓
Calls: TelegramBotAPI.handle_whereis_command("София")
    ↓
Calls: DatabaseAPI.find_student_location("София", current_time)
    ↓
Executes SQL query on school_schedule.db
    ↓
Returns: {"student": "София", "room": "204", "subject": "Design"}
    ↓
Formats for Telegram: "София: Room 204, Design & Creativity"
    ↓
Sends to user
```

## **API ENDPOINTS IN YOUR PROJECT:**

### **For Telegram Bot:**
```
Internal API Methods:
- find_student(current_time, student_name) → returns location
- get_daily_schedule(student_id, date) → returns schedule
- get_teacher_schedule(teacher_id) → returns teacher classes
- check_room_availability(room_id, time_slot) → returns boolean
```

### **For Future Web Portal (REST API):**
```http
# Student endpoints
GET    /api/v1/students                   # List all students
GET    /api/v1/students/{id}             # Get student details
GET    /api/v1/students/{id}/schedule    # Get student schedule
GET    /api/v1/students/{id}/location    # Get current location

# Teacher endpoints  
GET    /api/v1/teachers/{id}/schedule    # Get teacher schedule
GET    /api/v1/teachers/{id}/students    # Get teacher's students

# Schedule endpoints
GET    /api/v1/schedule/day/{date}       # Daily schedule
GET    /api/v1/schedule/room/{id}        # Room schedule
POST   /api/v1/schedule                  # Create schedule entry
PUT    /api/v1/schedule/{id}             # Update schedule

# Room endpoints
GET    /api/v1/rooms                     # List all rooms
GET    /api/v1/rooms/{id}/availability   # Check room availability
```

## **API IN YOUR TECHNOLOGY STACK:**

```python
# Your actual implementation (from your presentation):

# Telegram Bot → Python → SQLite Database
#           ↑        ↑
#        API Calls  API Layer

# File: bot_api.py (simplified version of what you have)

import sqlite3
from datetime import datetime

class SchoolSchedulerAPI:
    def __init__(self, db_path="school_schedule.db"):
        self.db_path = db_path
        self.connection = sqlite3.connect(db_path)
    
    def api_whereis_student(self, student_name):
        """API method called by Telegram bot"""
        query = """
        SELECT s.name, r.room_number, sub.subject_name, t.name as teacher
        FROM students s
        JOIN schedule_entries se ON s.student_id = se.student_id
        JOIN rooms r ON se.room_id = r.room_id
        JOIN subjects sub ON se.subject_id = sub.subject_id
        JOIN teachers t ON se.teacher_id = t.teacher_id
        WHERE s.name = ? AND se.time_slot = ?
        """
        
        current_time = datetime.now().strftime("%H:%M")
        result = self.connection.execute(query, (student_name, current_time)).fetchone()
        
        # API Response format
        if result:
            return {
                "success": True,
                "student": result[0],
                "room": result[1],
                "subject": result[2],
                "teacher": result[3],
                "time": current_time
            }
        else:
            return {"success": False, "message": "Student not found"}
    
    def api_get_schedule(self, student_name, date=None):
        """API to get full schedule"""
        # Implementation similar to above
        pass
```

## **WHY YOU NEED AN API:**

1. **Separation of Concerns**: Database logic separate from bot logic
2. **Reusability**: Same API can be used by:
   - Telegram Bot
   - Web Portal
   - Mobile App
   - Parent Dashboard
3. **Maintainability**: Change database without breaking bot
4. **Scalability**: Can add caching, load balancing
5. **Security**: Centralized authentication and validation

## **API IN YOUR FUTURE DEVELOPMENT:**

From your Slide 9 (Future Development):
```
Student/Parent portal → Needs API
Staff portal → Needs API  
AI suggestions → Uses API to get data
Analytics → Uses API to query database
```

## **SUMMARY:**

Your **API** is:
1. **The bridge** between Telegram bot and SQLite database
2. **A set of methods/functions** that handle specific requests
3. **The business logic layer** that processes data
4. **Future-ready** for web/mobile applications
5. **Implemented in Python** using functions/classes that interface with sqlite3

**Current API Flow:**
```
User → Telegram → Your Python Code (API) → SQLite → Response → User
```

**Future API Flow:**
```
Mobile App → HTTP Request → Web API (Flask/FastAPI) → SQLite → JSON Response → Mobile App
Parent Portal → Same API → Same Database
```

The API is what makes your system "intelligent" and accessible from multiple interfaces while keeping the database operations centralized and secure.