mosaicmap/CLAUDE.md

CLAUDE.md

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

Development Commands

• Development server: npm run dev - Starts Next.js development server on http://localhost:3000
• Build: npm run build - Creates production build
• Production server: npm run start - Starts production server (requires build first)
• Lint: npm run lint - Runs Next.js ESLint checks

Note: No test framework is currently configured in this project.

High-Level Architecture

This is a Next.js 15 application built with React 19 that creates an interactive map visualization with a custom WebGL timeline component.

Core Architecture Components

Map System:

• Uses MapLibre GL JS for interactive mapping
• app/map-context.tsx provides global map state management via React Context
• components/map-component.tsx handles map rendering and initialization
• Default map center: Singapore (103.851959, 1.290270) at zoom level 11
• Custom map style from MapTiler API

Timeline Visualization:

• app/timeline.tsx is a complex WebGL-powered timeline component using custom shaders
• Uses vesica piscis (lens-shaped) geometry rendered via WebGL2
• Custom GLSL shaders in app/glsl/timeline/ for vertex and fragment processing
• Supports interactive features: dragging, zooming, panning, custom time markers
• Dual-canvas architecture: WebGL canvas for vesica shapes, 2D canvas overlay for UI elements

UI Framework:

• Tailwind CSS with Radix UI components
• Theme system with dark/light mode support via components/theme-provider.tsx
• shadcn/ui component library in components/ui/
• Sidebar layout using components/ui/sidebar.tsx

Admin System:

• Comprehensive admin interface in app/admin/ with dashboard, analytics, user management, and content editor
• Admin pages include dynamic configuration system and navigation components
• Uses both Apollo Client and GraphQL Request for data fetching

Data Layer:

• GraphQL API integration using Apollo Client and GraphQL Request
• Backend communication via /api/bff endpoint (configured in lib/gr-client.ts)
• Page-based content management with block-based architecture
• Authentication support with JWT tokens

Key Technical Details

WebGL Timeline:

• Renders vesica piscis shapes as timeline markers
• Supports high-DPI displays with proper pixel ratio handling
• Interactive controls for zoom (mouse wheel), pan (drag), and custom time selection
• Real-time shader uniform updates for responsive interactions

State Management:

• Map state centralized in MapProvider context
• Timeline uses internal React state with refs for performance-critical interactions
• Custom hooks in hooks/ for map location, zoom, timeline, and mobile detection

Styling:

• Tailwind CSS v4 with PostCSS
• Custom animations via tw-animate-css
• Component styling via class-variance-authority and clsx

Build Configuration:

• Next.js 15 with App Router
• Custom webpack config for GLSL file loading via raw-loader (see next.config.ts)
• TypeScript with strict mode enabled
• Absolute imports using @/* path mapping

GraphQL Integration:

• Uses both Apollo Client (@apollo/client) and GraphQL Request (graphql-request) for different use cases
• Page content fetching via lib/fetchers.ts with support for authentication
• Block-based content architecture supporting TextBlock, ChartBlock, SettingsBlock, and HeroBlock types
• Environment variables: GRAPHQL_BACKEND_URL and NEXTAUTH_URL

File Structure Notes

• app/ - Next.js App Router pages and components
  • app/admin/ - Complete admin interface with dashboard, analytics, users, and content editor
  • app/glsl/timeline/ - Custom GLSL shaders for WebGL timeline rendering
• components/ - Reusable React components
  • components/ui/ - shadcn/ui component library
• hooks/ - Custom React hooks for map, timeline, and mobile detection
• lib/ - Utility functions including GraphQL clients and data fetchers
• types/ - TypeScript type definitions
• public/ - Static assets

The application combines modern web mapping with custom WebGL visualization to create an interactive timeline-driven map interface, complemented by a full-featured admin system for content management.