Opal

Opal is a Cloudflare Worker that acts as middleware between a client web UI and three social platforms. Users select a brand, upload content, configure platform-specific details, and schedule posts. A cron trigger fires every minute to publish due posts and refresh expiring OAuth tokens. The system supports multiple brands, each with their own platform connections and credentials. Key features include: - Multi-brand content scheduling across Instagram, TikTok, and Pinterest - Platform-specific adapters (IG Graph API, TikTok Content Posting API, Pinterest API v5) - Encrypted OAuth token storage with AES-GCM via Web Crypto API - Cron-based publisher with retry logic (3 attempts per post) - Automatic token refresh per platform expiry rules - R2 media storage with public URL generation - Error logging and resolution tracking - Layered architecture: Routes → Services → Repositories → Adapters → Models