TripHelper Backend ☁️⚙️

This repository contains the serverless backend for the TripHelper application. The entire infrastructure is defined as code using the AWS CDK and is built to be scalable and efficient.

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🏛️ Architecture Overview

Our backend is built on a serverless architecture using a suite of AWS services. The core of the application relies on AWS Lambda for compute logic and AWS AppSync to provide a flexible GraphQL API for our mobile client.

• API Layer: AWS AppSync serves as the GraphQL endpoint, allowing the frontend to fetch and mutate data efficiently, minimizing redundant data transfers compared to traditional REST APIs.
• Compute Layer: AWS Lambda functions (written in Node.js) handle all backend logic, from user authentication flows to the route-finding algorithm.
• Route Finding Algorithm: This is the core logic of our app. It uses the Google Maps Platform to find points of interest and then leverages Amazon Bedrock to run an LLM that ranks these places according to user preferences, creating a truly personalized route.
• Data Storage:
  • Amazon DynamoDB: A NoSQL database used to store user data, preferences, and saved routes.
  • Amazon S3: Used for storing user-uploaded images, such as profile pictures and route cover photos. We also use a Lambda function with the Sharp library to process these images.
• Authentication: Amazon Cognito handles all user authentication, including registration, login, and password recovery.
• Monitoring: Amazon CloudWatch is used to monitor Lambda usage and application logs.

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🛠️ Tech Stack

• Infrastructure as Code: AWS CDK
• Languages: TypeScript & JavaScript
• Runtime: Node.js
• Key AWS Services:
  • AWS Lambda
  • AWS AppSync (GraphQL)
  • Amazon DynamoDB
  • Amazon S3
  • Amazon Cognito
  • Amazon Bedrock
  • Amazon CloudWatch

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🚀 Deployment

To deploy the TripHelper backend infrastructure to your AWS account, follow the steps below.

Prerequisites

• An AWS Account
• AWS CLI installed and configured with credentials
• Node.js (LTS version)
• AWS CDK Toolkit (npm install -g aws-cdk)

Installation & Deployment

1. Clone the repository:

   git clone [https://github.com/TripHelperA/backend.git](https://github.com/TripHelperA/backend.git)
   cd backend

2. Install dependencies:

   npm install

3. Bootstrap your AWS environment (if you haven't used CDK in this region/account before):

   cdk bootstrap

4. Deploy the CDK stack:

   cdk deploy

   The CDK will provision all the necessary AWS resources defined in the stack.

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👥 Contributors

• Ahmed Utku Özüdoğru
• Eren Özilgili
• İbrahim Enes Yılmaz
• Berkay Demirçin
• Ahmet Eren Gözübenli

Mentor: Apul Jain