Implement Content Moderation Pipeline

[RUKAYAT-CODER]

Overview

The keyword filter service returns a stub and the external moderation API service is not wired. Quest titles and submission proof content are stored without any moderation.

Background

ModerationService has all the structural pieces: KeywordFilterService, ImageModerationService, ExternalModerationApiService, and ContentClassifierService. They need to be implemented and wired into the quest and submission creation flows.

Specifications

Features:

• Keyword filter with configurable block list (env-driven)
• External API integration (e.g. OpenAI moderation or Perspective API)
• Auto-reject submissions with flagged content

Tasks:

• Implement KeywordFilterService.filter(text)`n- Integrate external moderation API with fallback to keyword-only
• Wire moderation check in SubmissionsService.create`n

Impacted Files:

• BackEnd/src/modules/moderation/filters/keyword-filter.service.tsn- BackEnd/src/modules/moderation/filters/external-moderation-api.service.tsn- BackEnd/src/modules/submissions/submissions.service.ts`n

Acceptance Criteria:

• Blocked keywords cause quest/submission rejection with clear error
• External API failures fall back to keyword filter

[Spycall]

Can i work on this?

[Meet-hybrid]

CAN I WORK ON THIS PLEASE?

[akinboyewaSamson]

@akinboyewaSamson has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello, I’m a smart contract and full-stack developer interested in contributing to this issue. My technical background includes Rust, Soroban, Cairo, Solidity, and TypeScript, with a focus on building secure, scalable, and maintainable blockchain applications.

Based on the scope of this issue, I’m confident I can deliver a complete and well-tested solution within 10hours of assignment. I prioritize clean code, clear documentation, and efficient implementation.

I’d appreciate the opportunity to contribute and help move this issue forward.

Thank you.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @akinboyewaSamson to this issue.

[Opulencechuks]

@Opulencechuks has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I am confident that i can implement this issue having worked on something similar in the past

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Opulencechuks to this issue.