feat(snippets): implement public/private/shared snippet visibility #156

[Jimma08]

Overview

Implements public / private / shared snippet visibility with database support, API authorization, UI controls, and audit logging for visibility changes.

Related Issue

Closes #156

Changes

Database

• [ADD] scripts/add-visibility.sql — visibility column (default private), share_token, snippet_share_users table, indexes and CHECK constraint.

Repository / Service

• [MODIFY] snippet.repository.ts — persist visibility on create; visibility-aware findAll/search (anonymous → public only; authenticated → public + own + shared); shared-user helpers.
• [MODIFY] snippet.service.ts — setVisibility / getSharedUsers with activity-log audit trail; register sharedWith grants on create.
• [MODIFY] snippet.validator.ts — accept optional sharedWith on create.

API

• [ADD] app/api/snippets/[id]/visibility/route.ts — GET/PATCH visibility (owner-only changes).
• [MODIFY] app/api/snippets/[id]/route.ts — enforce private/shared/public access (share token + shared users).
• [MODIFY] app/api/snippets/route.ts — visibility-aware listing via wallet header / visibility query.

UI

• [MODIFY] SnippetForm.tsx / SnippetDetailModal.tsx — visibility selector and shared-with wallets.
• [MODIFY] form validation + types + activity-logger event names.

Tests

• [ADD] lib/snippet.visibility.test.ts and visibility route tests covering private/public/shared scenarios.

Verification Results

Visibility validation + setVisibility unit coverage added
Authorization paths implemented for private / public / shared
Audit events: snippet.visibility_changed, shared_user_added/removed

Acceptance Criteria	Status
Visibility field stored	Covered — column + create/update persistence
Private snippets protected	Covered — owner-only GET
Public snippets accessible	Covered — unauthenticated public GET + listing
Shared snippets restricted	Covered — share users + shareToken
UI controls available	Covered — form + detail modal
Audit logs maintained	Covered — activity logger events
Tests included	Covered — visibility unit/route tests

Closes #156

[vercel]

@Jimma08 is attempting to deploy a commit to the Sudipta 's projects Team on Vercel.

A member of the Team first needs to authorize it.

[drips-wave]

@Jimma08 Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits