# TODO List for Tercul Go Application --- ## [x] Performance Improvements - [x] **COMPLETED: Add pagination to all repository list operations** (High, 2d) - [x] /works: Add limit/offset support to repository and resolver - [x] /translations: Add limit/offset support to repository and resolver - [x] /authors: Add limit/offset support to repository and resolver - [x] /users: Add limit/offset support to repository and resolver - [x] /collections: Add limit/offset support to repository and resolver - [x] /tags: Add limit/offset support to repository and resolver - [x] /categories: Add limit/offset support to repository and resolver - [x] /comments: Add limit/offset support to repository and resolver - [x] /search: Add limit/offset support to repository and resolver - [x] Validate all endpoints for correct pagination and total count - [x] Add unit tests for paginated list operations - [x] Document pagination parameters in API docs - [x] **COMPLETED: Refactor raw SQL queries to use GORM structured methods** (High, 1d) - [x] Identify all usages of raw SQL queries in repositories and sync jobs - [x] Refactor syncEntities in syncjob/entities_sync.go to use GORM methods - [x] Refactor any string-concatenated queries to parameterized GORM queries - [x] Validate correctness and performance of refactored queries - [x] Add unit tests for refactored query logic - [x] Document query changes and migration steps - [ ] Implement batching for Weaviate operations (Medium, 2d) - [x] **COMPLETED: Optimize linguistic analysis algorithms** (Medium, 2d) - [x] Introduced clean NLP ports/adapters (`LanguageDetector`, `SentimentProvider`, `KeywordProvider`) - [x] Integrated lingua-go (language detection) and GoVADER (sentiment) behind adapters - [x] Added TF-IDF-based keyword provider (lightweight, state-free) - [x] Bounded in-memory cache via LRU with config-driven capacity - [x] Switched text cache keys to SHA-256 content hashes - [x] Concurrent analysis: provider-aware and context-cancellable - [x] Config toggles for providers and cache TTL - [x] **COMPLETED: Add database indexes for frequently queried fields** (Medium, 1d) - [x] Foreign key indexes for all relationships - [x] Unique indexes for constraint enforcement - [x] Timestamp indexes for sorting and filtering - [x] Composite indexes for complex queries - [x] Linguistic analysis indexes for performance - [x] **COMPLETED: Implement Redis caching for hot data** (Medium, 2d) ## [x] Security Enhancements - [x] **COMPLETED: Implement password hashing in User model** (Critical, 1d) - [x] bcrypt password hashing in BeforeSave hook - [x] CheckPassword method for password verification - [x] Automatic password hashing on model save - [x] **COMPLETED: Move hardcoded credentials to environment variables/config** (Critical, 1d) - [x] Fixed internal/cmd/enrich/main.go to use config package - [x] Fixed internal/testutil/testutil.go to use config package - [x] All database connections now use environment variables - [ ] Add comprehensive input validation for all GraphQL mutations (High, 2d) - [x] **COMPLETED: Implement rate limiting for API and background jobs** (High, 2d) - [x] Rate limiting middleware implemented - [x] Configuration for rate limits in config package - [x] **COMPLETED: Replace raw SQL with safe query builders to prevent SQL injection** (Critical, 1d) - [x] All repositories use GORM structured methods - [x] No raw SQL queries in production code ## [ ] Code Quality & Architecture - [x] Remove duplicate GraphQL folder and legacy server helper; keep single GraphQL layer under `graph/` for now - [x] **REFACTORED: Split linguistics/analyzer.go into focused components** (Completed) - [x] **COMPLETED: Clean NLP infrastructure and factory wiring** - [x] Ports for NLP capabilities with SRP/DRY boundaries - [x] Adapters for lingua-go and GoVADER with fallbacks - [x] Factory respects config toggles and wires providers - [x] Repository no longer leaks GORM into services; added methods for fetching work and analysis data - [x] Created `linguistics/text_analyzer.go` - Pure text analysis logic - [x] Created `linguistics/analysis_cache.go` - Caching logic with multiple strategies - [x] Created `linguistics/analysis_repository.go` - Database operations - [x] Created `linguistics/work_analysis_service.go` - Work-specific analysis coordination - [x] Created `linguistics/types.go` - Shared data structures - [x] Created `linguistics/text_utils.go` - Text processing utilities - [x] Created `linguistics/factory.go` - Component factory with dependency injection - [x] **REFACTORED: Split main.go into focused components** (Completed) - [x] Created `internal/app/application_builder.go` - Application initialization - [x] Created `internal/app/server_factory.go` - Server creation and configuration - [x] Refactored `main.go` to use dependency injection and builders - [x] **REFACTORED: Standardize repository implementation** (Completed) - [x] Improved BaseRepository with comprehensive error handling, validation, logging, and transaction support - [x] Removed GenericRepository wrapper (unnecessary duplication) - [x] Updated CachedRepository to use BaseRepository interface - [x] Refactored WorkRepository and UserRepository to use BaseRepository pattern - [x] Updated WorkService to use context in all repository calls - [x] Fixed GraphQL resolvers to use context for WorkRepository calls - [x] **REFACTORED: All repositories completed!** (Author, Tag, Category, Translation, Comment, Like, Bookmark, Collection, Book, Publisher, Country, Place, City, Source, Edition, UserProfile, UserSession, EmailVerification, PasswordReset, Contribution, Copyright, CopyrightClaim, Monetization, Edge) - [x] **COMPLETED: Updated mock repositories for testing** - [x] **COMPLETED: Updated services to use context in repository calls** - [x] **COMPLETED: Updated GraphQL resolvers to use context and handle pagination** - [x] **COMPLETED: Fixed linguistics package model field mismatches** - [x] **COMPLETED: Fixed application builder CopyrightRepository initialization** - [x] **COMPLETED: Fixed server factory configuration and interface issues** - [x] **COMPLETED: Removed all legacy code and interfaces** - [x] **COMPLETED: Project builds successfully!** - [x] **COMPLETED: Add a service layer for business logic and validation** (High, 2d) - [x] Comprehensive validation in all service methods - [x] Business logic separation from repositories - [x] Input validation for all service operations - [x] Refactor duplicate code in sync jobs (Medium, 1d) - [x] **COMPLETED: Improve error handling with custom error types and propagation** (High, 2d) - [x] Custom error types defined in BaseRepository - [x] Error wrapping and propagation throughout codebase - [x] Standardized error handling patterns - [ ] Expand Weaviate client to support all models (Medium, 2d) - [ ] Add code documentation and API docs (Medium, 2d) ## [ ] Testing - [ ] Add unit tests for all models, repositories, and services (High, 3d) - [ ] Add integration tests for GraphQL API and background jobs (High, 3d) - [ ] Add performance benchmarks for critical paths (Medium, 2d) - [x] Added unit tests for linguistics adapters (lingua-go, GoVADER) and utilities - [ ] Add benchmarks for text analysis (sequential vs concurrent) and cache hit/miss rates ## [x] Monitoring & Logging - [x] **COMPLETED: Integrate a structured logging framework** (Medium, 1d) - [x] Structured logging implemented throughout codebase - [x] Performance timing and debug logging in repositories - [x] Error logging with context and structured fields - [ ] Add monitoring for background jobs and API endpoints (Medium, 2d) - [ ] Add metrics for linguistics: analysis duration, cache hit/miss, provider usage --- ## Next Objective Proposal - [ ] Stabilize non-linguistics tests and interfaces (High, 2d) - [ ] Fix `graph` mocks to accept context in service interfaces - [ ] Update `repositories` tests (missing `TestModel`) and align with new repository interfaces - [ ] Update `services` tests to pass context and implement missing repo methods in mocks - [ ] Add performance benchmarks and metrics for linguistics (Medium, 2d) - [ ] Benchmarks for AnalyzeText (provider on/off, concurrency levels) - [ ] Export metrics and dashboards for analysis duration and cache effectiveness - [ ] Documentation (Medium, 1d) - [ ] Document NLP provider toggles and defaults in README/config docs - [ ] Describe SRP/DRY design and extension points for new providers ## [x] Security & Auth - [x] **COMPLETED: Implement JWT authentication and role-based authorization** (High, 2d) - [x] JWT token generation and validation with proper error handling - [x] Role-based authorization with hierarchy (reader < contributor < reviewer < editor < admin) - [x] Authentication middleware for GraphQL and HTTP with context validation - [x] Login and registration mutations with comprehensive input validation - [x] Password hashing with bcrypt (already implemented in User model) - [x] Environment variable configuration for JWT with secure defaults - [x] Comprehensive authentication service following SRP and clean code principles - [x] Structured logging with proper error context and performance timing - [x] Input sanitization and validation using govalidator - [x] Context validation and proper error propagation - [x] Integration with existing rate limiting system - [x] GraphQL schema alignment with Go models - [x] Comprehensive test coverage for authentication components - [x] Production-ready error handling and security practices - [x] **COMPLETED: Add rate limiting middleware** (High, 1d) - [x] Rate limiting middleware implemented and tested - [x] Configuration-driven rate limits - [x] **COMPLETED: Use environment variables for all sensitive config** (Critical, 1d) - [x] All database credentials use environment variables - [x] Redis configuration uses environment variables - [x] Centralized configuration management --- > TODO items include context, priority, and estimated effort. Update this list after each milestone.