🚀 DevConnect

DevConnect is a social collaboration platform for developers where they can connect, share posts, build projects, and find collaborators easily.

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✅ Features

• ✅ User registration & profile management
• ✅ Create, edit, and delete Posts and Projects
• ✅ Like, share, and comment on posts
• ✅ Tag-based project & post discovery
• ✅ Follow other developers
• ✅ Intelligent recommendations:
  • Suggested projects
  • Suggested people to follow
  • Suggested posts based on tags & interactions
• ✅ Upload and store profile pictures and media files
• ✅ Hybrid database system:
  • ✅ MongoDB for storing posts, users, projects, comments
  • ✅ Neo4j for social graph relationships and recommendations
  • ✅ Azure Blob Storage for storing media (profile pictures, project assets)

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🎯 Technology Stack

Layer	Technology
Frontend	React
Backend	Spring Boot (Java)
Database	MongoDB (Primary data storage)
Graph Database	Neo4j (Social graph & recommendations)
Object Storage	Azure Blob Storage (Profile pictures, media files)
API Design	RESTful endpoints

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✅ Architecture Overview

1. MongoDB

   • Stores persistent data:
     • User, Post, Project, Comment documents
     • Likes, Shares stored in post document fields

2. Neo4j

   • Models relationships for recommendations:
     • Users ↔ Users (Follow)
     • Users ↔ Tags (Interests)
     • Posts ↔ Tags (Discovery)
     • Projects ↔ Tags (Discovery)

3. Azure Blob Storage

   • Stores user profile pictures and project assets securely in cloud storage
   • Efficient serving of media files

4. ElasticSearch (Future)

   • Full-text search of projects, posts, and users.

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✅ Example Use Case Flow

✅ User Creates a Post

1. Post is saved in MongoDB.
2. Post tags are synced to Neo4j:
   PostNode → TAGGED_WITH → TagNode

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✅ User Uploads Profile Picture

1. Profile picture is uploaded from frontend.
2. Backend uploads file to Azure Blob Storage.
3. URL to the blob is saved in MongoDB under user document.

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✅ User Likes a Post

1. Like count + userId updated in MongoDB Post document.
2. UserNode -[:LIKED]-> PostNode relationship created in Neo4j.

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✅ Setup Instructions

1. Configure application.properties

# Server port
server.port=8000

# JWT Secret (env var fallback or hardcoded)
JWT_SECRET_BASE64_KEY=

# Azure Storage connection string
azure.storage.connection-string=YOUR_ACTUAL_CONNECTION_STRING

# Application name
spring.application.name=jujutsu

# OAuth2 Configuration
spring.security.oauth2.client.registration.google.client-id=48755-dmheoup4s98e.apps.googleusercontent.com
spring.security.oauth2.client.registration.google.client-secret=GOCDDPdnk
spring.security.oauth2.client.registration.google.scope=profile,email
spring.security.oauth2.client.registration.google.redirect-uri=http://localhost:8080/login/oauth2/code/google

spring.security.oauth2.client.registration.github.client-id=O84Hq
spring.security.oauth2.client.registration.github.client-secret=18da367461c4
spring.security.oauth2.client.registration.github.scope=read:user,user:email
spring.security.oauth2.client.registration.github.redirect-uri=http://localhost:8080/login/oauth2/code/github

spring.security.oauth2.client.provider.github.authorization-uri=https://github.com/login/oauth/authorize
spring.security.oauth2.client.provider.github.token-uri=https://github.com/login/oauth/access_token
spring.security.oauth2.client.provider.github.user-info-uri=https://api.github.com/user

# MongoDB Configuration
spring.data.mongodb.uri=YOUR_ACTUAL_MONGO_URI
spring.data.mongodb.auto-index-creation=true
spring.data.mongodb.database=jujutsudb

spring.data.neo4j.database=DB_NAME
spring.neo4j.uri=neo4j_URI
spring.neo4j.authentication.password=NEO4J_PASS
spring.neo4j.authentication.username=NEO4j_USER

✅ Setup Instructions

2. Install dependencies:

   mvn clean install

3. Run backend:

   mvn spring-boot:run

4. Connect React frontend to the backend API.