DiunDashboard/.claude/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Commands

# Run all tests with coverage
go test -v -coverprofile=coverage.out -coverpkg=./... ./...

# Run a single test
go test -v -run TestWebhookHandler ./pkg/diunwebhook/

# Run the app locally
go run ./cmd/diunwebhook/

# Build Docker image
docker build -t diun-webhook-dashboard .

# Run with Docker Compose
docker compose up -d

# Frontend (from frontend/ directory)
bun install          # install deps
bun run dev          # dev server on :5173 (proxies /api and /webhook to :8080)
bun run build        # production build → frontend/dist/

CI warns (but does not fail) when coverage drops below 80%.

Architecture

The app is a Go HTTP server that receives DIUN webhook events and exposes them via a JSON API and a React SPA dashboard. Events are persisted to a SQLite database (diun.db) using modernc.org/sqlite (pure Go, no CGO).

Package layout:

• pkg/diunwebhook/ — core library: DiunEvent, UpdateEntry, and Tag structs; SQLite-backed storage (guarded by sync.Mutex); HTTP handlers (WebhookHandler, UpdatesHandler, DismissHandler, TagsHandler, TagByIDHandler, TagAssignmentHandler)
• cmd/diunwebhook/main.go — calls InitDB(), wires handlers onto net/http's default mux, serves ./frontend/dist at /, listens on :8080 (overridable via PORT env var), graceful shutdown
• pkg/diunwebhook/diunwebhook_test.go — external test package (package diunwebhook_test); uses httptest for handler tests
• pkg/diunwebhook/export_test.go — test-only exports
• frontend/ — React SPA (Bun + Vite + React 19 + Tailwind CSS + shadcn/ui + dnd-kit)

Database schema (SQLite):

• updates — one row per image (PRIMARY KEY image), stores full event fields plus received_at and acknowledged_at
• tags — user-defined tag/group names (id INTEGER PK, name UNIQUE)
• tag_assignments — maps image → tag_id (FK with CASCADE delete)

API routes:

• POST /webhook — accept a DIUN event
• GET /api/updates — return all events (with tag and acknowledged state)
• PATCH /api/updates/{image} — mark an event as acknowledged (dismiss)
• GET /api/tags — list all tags
• POST /api/tags — create a tag
• DELETE /api/tags/{id} — delete a tag (cascades to assignments)
• PUT /api/tag-assignments — assign an image to a tag
• DELETE /api/tag-assignments — unassign an image from its tag

Key data flow:

1. DIUN POSTs JSON to /webhook → WebhookHandler decodes into DiunEvent → upserted into updates table (latest event per image wins, resets acknowledged state)
2. React SPA polls GET /api/updates every 5 s → UpdatesHandler returns map of UpdateEntry (includes event, received time, acknowledged flag, and optional tag)
3. User can dismiss updates via PATCH /api/updates/{image} and organize images into tag groups via the tag/assignment endpoints

Test helpers exposed from the library package (not part of the public API, only for tests): GetUpdatesMap(), UpdatesReset(), UpdateEvent(), ResetTags().