Implement 3-Layer Data Persistence Architecture with Standardized Environment Variables

[Copilot]

This PR implements a comprehensive architectural overhaul of the Discord bot, replacing the legacy Redis-only storage system with a modern 3-layer data persistence architecture and introducing queue-based webhook processing for improved reliability and performance.

🏗️ Architecture Changes

New 3-Layer Storage System

The bot now implements a sophisticated storage hierarchy:

• Layer 1 (Memory): Ultra-fast in-memory cache with LRU eviction for frequently accessed data
• Layer 2 (Redis): Distributed cache layer for persistence across application restarts
• Layer 3 (PostgreSQL): Primary database providing ACID compliance and complex query capabilities

Queue-Based Webhook Processing

Replaced direct webhook handling with an asynchronous queue system:

• BullMQ Integration: Robust job queue with automatic retry logic and exponential backoff
• Hard-coded Configuration: Optimized queue settings (concurrency: 5, maxRetries: 3, retryDelayMs: 5000) for consistent performance
• Priority Processing: High/normal/low priority queues for different event types
• Dead Letter Queue: Failed job handling with manual retry capabilities
• Rate Limiting: Built-in processing limits to prevent API overload

🔧 Environment Variable Standardization

Aligned with Unthread Ecosystem

Updated environment variables to match the naming convention from unthread-telegram-bot:

• PLATFORM_REDIS_URL - Redis cache connection for L2 storage
• WEBHOOK_REDIS_URL - Redis queue connection for webhook processing
• DATABASE_URL - PostgreSQL connection for L3 persistent storage

Simplified Configuration

• Queue Settings: Hard-coded for optimal performance, no environment configuration needed
• Required Variables: Only 9 essential environment variables needed
• Docker Ready: Complete Docker Compose setup with standardized variable names

🚀 Performance Improvements

The new architecture provides significant performance benefits:

• Automatic Fallback: Seamless data retrieval across storage layers
• Cache Warming: Intelligent cache population from lower layers
• Connection Pooling: Optimized database connections
• Webhook Reliability: Immediate HTTP responses prevent timeout issues

🔧 Developer Experience

Docker Compose Integration

Complete local development environment with:

# Start all services instantly
docker-compose up -d

# Includes PostgreSQL, Redis (cache), Redis (queue), and the bot

Comprehensive Monitoring

New health check endpoints:

• GET /health - Overall system status with storage layer health
• GET /webhook/health - Queue system metrics and processing statistics
• GET /webhook/metrics - Detailed webhook performance data
• POST /webhook/retry - Manual retry of failed webhook jobs

Environment Configuration

Standardized environment variables for the new architecture:

# Storage Configuration
DATABASE_URL=postgres://user:password@localhost:5432/database
PLATFORM_REDIS_URL=redis://localhost:6379
WEBHOOK_REDIS_URL=redis://localhost:6380

# Queue processing is automatically configured with optimal defaults

📦 Key Components

Core Storage Engine (src/sdk/bots-brain/UnifiedStorage.ts)

• Thread-safe operations across all storage layers
• Automatic cache warming and invalidation
• Comprehensive error handling and fallback mechanisms
• Performance metrics and monitoring

Discord-Specific Operations (src/sdk/bots-brain/BotsStore.ts)

• Type-safe customer and ticket mapping operations
• High-level abstractions for Discord bot functionality
• Automatic bidirectional cache management

Queue Processing (src/services/QueueProcessor.ts)

• Resilient webhook event processing
• Hard-coded retry policies with exponential backoff
• Priority-based job processing
• Health monitoring and metrics collection

🗄️ Database Schema

New PostgreSQL schema with optimized indexes:

• customers - Discord user and Unthread customer mapping
• thread_ticket_mappings - Discord thread to Unthread ticket relationships
• storage_cache - L3 persistent cache with TTL support
• Automatic cleanup procedures for expired data

🔄 Migration Strategy

This implementation provides a clean start approach:

• Legacy storage components cleanly removed
• No data migration required (fresh start)
• Backward compatibility maintained for existing integrations
• Environment variables updated for ecosystem consistency

🧪 Quality Assurance

• ✅ Zero TypeScript compilation errors
• ✅ ESLint compliance (existing warnings preserved)
• ✅ Comprehensive type safety with strict interfaces
• ✅ Docker Compose validation
• ✅ Complete documentation updates
• ✅ Environment variable naming aligned with unthread-telegram-bot

The new architecture provides a solid foundation for scalable Discord bot operations with modern storage patterns, comprehensive monitoring, and improved developer experience while maintaining consistency across the Unthread bot ecosystem.

Created from VS Code via the GitHub Pull Request extension.

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[warengonzaga]

@copilot can you follow the same environment variable naming from https://github.com/unthread-telegram-bot? Make the queue hard-coded and no need to set up from environment variables.

[Copilot]

@copilot can you follow the same environment variable naming from https://github.com/unthread-telegram-bot? Make the queue hard-coded and no need to set up from environment variables.

Done! I've updated the environment variable naming to match unthread-telegram-bot conventions:

• REDIS_CACHE_URL → PLATFORM_REDIS_URL
• REDIS_QUEUE_URL → WEBHOOK_REDIS_URL

The queue configuration is now hard-coded with default values (concurrency: 5, maxRetries: 3, retryDelayMs: 5000, etc.) and no longer uses environment variables for configuration.

All documentation, Docker Compose, and code references have been updated to use the new naming convention. Commit: 6706276

[Copilot]

Pull Request Overview

This PR implements a comprehensive 3-layer data persistence architecture and queue-based webhook processing system to replace the existing Redis-only storage approach. The changes establish a robust, scalable foundation using PostgreSQL (L3), Redis cache (L2), and in-memory storage (L1) with automatic fallback capabilities.

Key changes include:

• Complete replacement of the legacy cache/memory utilities with a unified 3-layer storage system
• Implementation of queue-based webhook processing using BullMQ for reliable async event handling
• Environment variable updates to align with telegram bot conventions (PLATFORM_REDIS_URL, WEBHOOK_REDIS_URL)

Reviewed Changes

Copilot reviewed 20 out of 21 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/utils/threadUtils.ts	Updated to use BotsStore for thread-ticket mapping lookups, removed lookup function parameter
src/utils/memory.ts	Completely removed legacy memory cache utilities
src/utils/database.ts	Completely removed legacy Redis-only database utilities
src/utils/customerUtils.ts	Migrated to BotsStore for customer operations, updated interface exports
src/utils/cache.ts	Completely removed legacy Cacheable-based cache module
src/types/discord.ts	Updated BotConfig interface with new storage environment variables
src/services/webhook.ts	Complete rewrite implementing queue-based processing with comprehensive monitoring
src/services/unthread.ts	Updated to use BotsStore for all storage operations, removed legacy cache dependencies
src/services/QueueProcessor.ts	New queue processing system with retry logic, metrics, and health monitoring
src/sdk/bots-brain/UnifiedStorage.ts	New 3-layer storage engine implementation
src/sdk/bots-brain/BotsStore.ts	New Discord-specific storage operations built on UnifiedStorage
src/index.ts	Updated initialization to use new storage architecture and queue system
src/events/threadCreate.ts	Minor fix for email fallback
src/events/messageDelete.ts	Updated to use BotsStore for deleted message caching
src/events/interactionCreate.ts	Updated customer operations and cache clearing to use BotsStore

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