[Backend] Implement GraphQL API

[gelluisaac]

Overview

Implement a GraphQL API alongside the REST API for flexible data fetching.

Current State

• Only REST API exists
• No GraphQL support
• Over-fetching/under-fetching issues
• Limited query flexibility

Requirements

1. GraphQL Features

   • Schema definition
   • Query resolvers
   • Mutation resolvers
   • Subscriptions (WebSocket)
   • Schema stitching

2. GraphQL Tools

   • Apollo Server
   • GraphQL Playground
   • Schema documentation
   • Query validation
   • Query complexity analysis

3. Integration

   • Coexist with REST API
   • Share business logic
   • Authentication integration
   • Authorization integration
   • Rate limiting integration

4. Performance

   • Query batching
   • Data loader (N+1 problem)
   • Query caching
   • Response compression
   • Query depth limiting

Technical Details

• Use Apollo Server
• Define GraphQL schema
• Implement resolvers
• Add DataLoader for performance
• Integrate with existing services

Files to Create/Modify

• backend/src/graphql/ (create)
• backend/src/graphql/schema.ts (create)
• backend/src/graphql/resolvers/ (create)
• backend/src/graphql/dataloaders.ts (create)
• backend/src/index.ts (add GraphQL server)

Acceptance Criteria

• GraphQL server runs
• Queries work correctly
• Mutations work correctly
• Subscriptions work
• Authentication works
• Authorization works
• Performance is good
• Documentation is complete

References

• Apollo Server: https://www.apollographql.com/docs/apollo-server/
• GraphQL best practices: https://graphql.org/learn/best-practices/
• DataLoader: https://github.com/graphql/dataloader

[aliyuHabibu]

Hi, I'm a software engineer, I've gone through the issue and I can resolve it. Assign it to me thank you

[aliyuHabibu]

Hi, I'm a software engineer, I've gone through the issue and I can resolve it. Assign it to me thank you

[DevAyomi]

Hi Maintainer, Please i would love to work on this issue

[anonfedora]

I'd like to work on this issue because I have experience building and integrating GraphQL APIs alongside existing REST services.

I've worked with Apollo Server, GraphQL schema design, resolvers, authentication and authorization flows, WebSocket subscriptions, and DataLoader for solving N+1 query issues. I also have experience implementing rate limiting, query validation, caching, and performance optimizations in TypeScript backends.

I'm confident in delivering a GraphQL layer that coexists cleanly with the existing REST API while reusing business logic, maintaining security standards, and providing comprehensive documentation.

ETA: 12 hours

[grantfox-oss]

🦊 GrantFox — @anonfedora has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #183)
2. Your PR will be reviewed by the nexoraorg maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign campaign!

@anonfedora's PR #196 was approved and merged by @gelluisaac.

🏆 @anonfedora: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (48 total points). Track your full progress on GrantFox.

👏 Great work, @anonfedora! Keep contributing to nexoraorg.