🩸 Blood Bridge — Smart Blood Donor & Request System

Connecting blood donors with patients in urgent need — built to save lives.

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📌 Overview

Blood Bridge is a full-stack web application designed to eliminate the gap between blood donors and patients in critical need. The platform provides a complete ecosystem — from donor registration and emergency alerts to admin-controlled approvals and real-time notifications — all within a clean, responsive interface.

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✨ Key Features

Feature	Description
🔐 Multi-Role Auth	Separate secure dashboards for Admin, Donor, and Requester
🚨 Emergency Alerts	Donors with matching blood group are instantly notified
🩸 Blood Inventory	Admin tracks and manages blood units by group
🔔 Notifications	Real-time role-based alerts across all user types
💬 Bilingual Chatbot	Floating widget — responds in both Urdu and English
🛡️ Security	SQL injection prevention and session-based access control
📱 Responsive UI	Red-and-white medical theme, works on all screen sizes

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🛠️ Tech Stack

Layer	Technology
Frontend	HTML5, CSS3, JavaScript
Backend	PHP (Procedural)
Database	MySQL
Server	XAMPP / Apache
Icons	Font Awesome 6

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👥 User Roles & Access

🔴 Admin

• Approve or reject blood requests
• View and confirm matched donors
• Manage blood inventory
• Read contact messages and notifications

🟡 Donor

• Receive emergency alerts based on blood group match
• Accept or decline emergency requests
• Track donation history and availability status

🟢 Requester

• Submit standard and emergency blood requests
• Track request status in real time
• Receive donor match notifications from admin

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🚨 Emergency Request Flow

Requester submits emergency form
            ↓
Matching donor receives alert on dashboard
            ↓
Donor accepts → Admin notified
            ↓
Admin confirms donor → Requester notified with donor details
            ↓
Request marked Approved ✅

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💬 Bilingual Chatbot

A floating chatbot widget on the homepage that:

• Auto-detects Urdu or English based on user input
• Answers common queries — donation, registration, emergency, blood groups, contact
• Built with pure JavaScript — no third-party API required
• Accessible via a floating button on the bottom-right corner

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🔐 Security Implementation

• Session-based authentication with role verification on every page
• intval() applied on all $_GET parameters to prevent SQL injection
• Input sanitization across all user-facing forms
• Unauthorized URL access redirects to login page

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📁 Project Structure

blood-bridge/
├── index.php                  # Homepage
├── login.php                  # Login page
├── register.php               # Registration page
├── admin_dashboard.php        # Admin panel
├── donor_dashboard.php        # Donor panel
├── requester_dashboard.php    # Requester panel
├── emergency_request.php      # Emergency blood request form
├── contact.php                # Contact page
├── style.css                  # Main stylesheet
└── Images/                    # Project images

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📄 License

This project was developed for academic purposes at QUEST University.