Deliverable-3/System-Architecture.md

@@ -13,7 +13,8 @@ The client side application is developed using React Native, enabling cross-plat
 - Real time reminders, expense visualization, and calorie tracking
 - AI powered recipe suggestions based on available inventory  
 The mobile app communicates with the backend over HTTPS, using JSON formatted data via RESTful API calls to ensure secure and standardized information exchange     
-Application Layer (Backend Server – Node.js/Express)  
+  
+**Application Layer (Backend Server – Node.js/Express)**   
 The backend is built with Node.js and Express, exposing a set of REST API endpoints for core functionalities:  
 - /users: Handles user registration, login, and password reset
 - /group: Manages group creation, joining, leaving, and ownership transfer
@@ -22,15 +23,18 @@ These endpoints follow RESTful principles to ensure modularity and ease of integ
 - Email based password verification using Nodemailer
 - Intelligent recipe requests to an external AI service
 - Calorie and BMI computations for personalized health tracking  
-Data Layer (Database – MongoDB via Mongoose)  
+- 
+**Data Layer (Database – MongoDB via Mongoose)**  
 Persistent data storage is handled by MongoDB, with Mongoose used for schema validation and object modeling.   
 The database structure supports the following collections:  
 - Users: Stores account credentials, BMI data, and user preferences
 - Groups: Records group metadata and member associations
 - Items: Contains inventory items with attributes like expiry, price, and calorie value
 - Logs: Tracks food consumption history and financial records
+
 This flexible schema supports efficient querying and easy schema evolution, enabling real time group synchronization and historical data analytics.   
-External Services  
+
+**External Services  **  
 To extend core functionality, the system integrates with two external services:  
 - Gmail SMTP (via Nodemailer): Used for sending 6 digit verification codes during password reset workflows, enhancing account security  
 - Spoonacular API: Provides personalized recipe suggestions by analyzing the user’s inventory and dietary preferences  
@@ -40,7 +44,7 @@ To extend core functionality, the system integrates with two external services:
 | ------ | ------ |
 | Secure authentication       | HTTPS, JWT tokens, and email verification via SMTP       |
 |  Group collaboration      | Shared MongoDB group model with role based access and synchronized REST API endpoints       |
-| Expiry and usage alerts     |  | Backend tracks expiry dates; frontend displays dynamic notifications   |
+| Expiry and usage alerts     | Backend tracks expiry dates; frontend displays dynamic notifications   |
 |  Expense tracking      | MongoDB logging combined with client side charting features     |
 | AI powered recipes         | Backend connects to Spoonacular API to generate intelligent suggestions     |
 |  Cross platform compatibility |     React Native ensures compatibility with both iOS and Android devices |