architecture

name	architecture
description	Understand onepixel runtime architecture, host-based app dispatch, and redirect analytics flow before changing behavior across routes/controllers/db.

Architecture Skill

Use this skill when implementing features that cross app startup, routing, controller behavior, or data boundaries.

Runtime model

• Process entrypoint: src/main.go.
• Startup initializes three singleton data clients:
  • app DB (db.GetAppDB)
  • events DB (db.GetEventsDB)
  • GeoIP DB (db.GetGeoIPDB)
• HTTP entry app dispatches by Host header:
  • ADMIN_SITE_HOST -> server.CreateAdminApp
  • MAIN_SITE_HOST -> server.CreateMainApp

Data boundaries

• App DB stores users, URL groups, URLs.
• Events DB stores redirect analytics events.
• DB singletons and migrations are in src/db/init.go.

Redirect and analytics flow

• Redirect handlers are in src/routes/redirect/redirect.go.
• Redirect resolution logs events asynchronously using EventsController.LogRedirectAsync.
• Event enrichment includes GeoIP and PostHog emission (src/utils/posthog/posthog_client.go).

API layering pattern

• Preserve this stack for new/changed endpoints:
  • route handler -> parser (src/server/parsers) -> validator (src/server/validators) -> controller -> DTO response