Initial commit: MVP scaffolding for Line of Sight application
- React frontend with MapLibre integration - Node.js Express backend with dummy API - Docker containerization (PostgreSQL+PostGIS, backend, frontend) - Interactive map with direction selector - 20 mock conurbations data - Full project structure ready for PR workflow
This commit is contained in:
Agent Zero
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import React, { useState, useEffect, useRef } from 'react';
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import maplibregl from 'maplibre-gl';
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import 'maplibre-gl/dist/maplibre-gl.css';
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import apiService from './services/api';
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import './styles/App.css';
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const APP = () => {
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const mapContainerRef = useRef(null);
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const mapRef = useRef(null);
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const [selectedPoint, setSelectedPoint] = useState({ lat: 51.5074, lon: -0.1278 });
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const [direction, setDirection] = useState(45);
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const [lineOfSightData, setLineOfSightData] = useState(null);
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const [loading, setLoading] = useState(false);
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const [mapStyle, setMapStyle] = useState('light'); // 'light' or 'dark'
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const [tolerance, setTolerance] = useState(50);
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useEffect(() => {
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// Initialize MapLibre map
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mapRef.current = new maplibregl.Map({
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container: mapContainerRef.current,
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style: getMapStyle(mapStyle),
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center: [-0.1278, 51.5074], // London
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zoom: 3,
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pitch: 0
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});
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mapRef.current.on('load', () => {
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console.log('Map loaded successfully');
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});
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mapRef.current.on('click', (e) => {
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const { lng, lat } = e.lngLat;
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setSelectedPoint({ lat, lon: lng });
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// Clear previous line
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if (mapRef.current.getSource('line-of-sight')) {
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mapRef.current.removeLayer('line-of-sight');
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mapRef.current.removeSource('line-of-sight');
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}
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});
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return () => {
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mapRef.current.remove();
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};
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}, []);
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useEffect(() => {
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// Update map style when toggle changes
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if (mapRef.current) {
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mapRef.current.setStyle(getMapStyle(mapStyle));
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}
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}, [mapStyle]);
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const getMapStyle = (style) => {
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return style === 'dark'
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? 'https://demotiles.maplibre.org/style.json'
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: 'https://demotiles.maplibre.org/style.json'; // Using same for now, can be customized
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};
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const handleShowLineOfSight = async () => {
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setLoading(true);
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try {
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const response = await apiService.getLineOfSight(
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selectedPoint.lat,
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selectedPoint.lon,
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direction,
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tolerance
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);
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setLineOfSightData(response.data);
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renderLineOnMap(response.data);
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} catch (error) {
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console.error('Error fetching line of sight:', error);
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} finally {
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setLoading(false);
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}
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};
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const renderLineOnMap = (data) => {
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const map = mapRef.current;
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if (!map) return;
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// Clear existing line
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if (map.getSource('line-of-sight')) {
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map.removeLayer('line-of-sight');
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map.removeSource('line-of-sight');
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}
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// Add line source
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map.addSource('line-of-sight', {
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type: 'geojson',
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data: {
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type: 'Feature',
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properties: {},
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geometry: {
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type: 'LineString',
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coordinates: data.line_coordinates.map(coord => [coord.lon, coord.lat])
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}
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}
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});
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// Add line layer
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map.addLayer({
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id: 'line-of-sight',
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type: 'line',
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source: 'line-of-sight',
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layout: {
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'line-join': 'round',
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'line-cap': 'round'
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},
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paint: {
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'line-color': '#FF6B6B',
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'line-width': 4,
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'line-opacity': 0.8
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}
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});
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// Add city markers
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data.conurbations.forEach((city, index) => {
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const markerId = `city-${index}`;
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// Create marker element
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const el = document.createElement('div');
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el.className = 'city-marker';
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el.innerHTML = `
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<div class="marker-dot"></div>
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<div class="marker-label">${city.name}</div>
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<div class="marker-pop">${(city.population / 1000000).toFixed(1)}M</div>
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`;
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// Add marker to map
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new maplibregl.Marker(el)
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.setLngLat([city.lon, city.lat])
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.setPopup(new maplibregl.Popup().setHTML(
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`<strong>${city.name}</strong><br/>Population: ${city.population.toLocaleString()}<br/>Distance: ${city.distance_km} km`
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))
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.addTo(map);
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});
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// Fit bounds to show line
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const bounds = new maplibregl.LngLatBounds();
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data.line_coordinates.forEach(coord => {
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bounds.extend([coord.lon, coord.lat]);
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});
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map.fitBounds(bounds, { padding: 50 });
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};
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return (
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<div className="app-container">
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<div className="map-container" ref={mapContainerRef}></div>
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<div className="controls">
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<div className="control-group">
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<h3>Line of Sight Settings</h3>
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<div className="setting-row">
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<label>Start Point:</label>
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<span>{selectedPoint.lat.toFixed(4)}, {selectedPoint.lon.toFixed(4)}</span>
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</div>
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<div className="setting-row">
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<label>Direction (0-360°):</label>
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<input
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type="range"
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min="0"
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max="360"
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value={direction}
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onChange={(e) => setDirection(parseInt(e.target.value))}
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/>
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<span>{direction}°</span>
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</div>
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<div className="setting-row">
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<label>Fuzziness Tolerance (km):</label>
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<input
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type="number"
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value={tolerance}
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onChange={(e) => setTolerance(parseInt(e.target.value))}
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min="10"
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max="200"
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/>
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<span>{tolerance} km</span>
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</div>
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<div className="setting-row">
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<label>Map Style:</label>
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<button onClick={() => setMapStyle('light')}>Light</button>
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<button onClick={() => setMapStyle('dark')}>Dark</button>
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</div>
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<button
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className="action-btn"
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onClick={handleShowLineOfSight}
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disabled={loading}
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>
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{loading ? 'Calculating...' : '📡 Show Line of Sight'}
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</button>
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</div>
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{lineOfSightData && (
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<div className="results-panel">
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<h3>Conurbations Found ({lineOfSightData.conurbations.length})</h3>
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<table>
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<thead>
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<tr>
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<th>#</th>
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<th>City</th>
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<th>Population</th>
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<th>Distance</th>
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</tr>
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</thead>
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<tbody>
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{lineOfSightData.conurbations.slice(0, 10).map((city, index) => (
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<tr key={city.id}>
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<td>{index + 1}</td>
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<td>{city.name}</td>
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<td>{(city.population / 1000000).toFixed(1)}M</td>
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<td>{city.distance_km} km</td>
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</tr>
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))}
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</tbody>
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</table>
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{lineOfSightData.conurbations.length > 10 && (
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<p className="more-info">... and {lineOfSightData.conurbations.length - 10} more cities</p>
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)}
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</div>
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)}
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<div className="instructions">
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<h3>How to Use</h3>
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<ol>
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<li>Click anywhere on the map to select a starting point</li>
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<li>Adjust the direction using the slider (0-360°)</li>
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<li>Set your fuzziness tolerance (how close cities must be to the line)</li>
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<li>Click "Show Line of Sight" to visualize the path and cities</li>
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</ol>
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</div>
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</div>
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</div>
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);
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};
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export default APP;
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@@ -0,0 +1,11 @@
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import React from 'react';
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import ReactDOM from 'react-dom/client';
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import App from './App';
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import './styles/index.css';
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const root = ReactDOM.createRoot(document.getElementById('root'));
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root.render(
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<React.StrictMode>
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<App />
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</React.StrictMode>
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);
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@@ -0,0 +1,25 @@
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import axios from 'axios';
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const API_BASE_URL = process.env.REACT_APP_API_URL || 'http://localhost:3001/api';
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const api = axios.create({
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baseURL: API_BASE_URL,
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timeout: 10000,
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headers: {
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'Content-Type': 'application/json'
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}
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});
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export const getLineOfSight = async (lat, lon, direction, tolerance) => {
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const response = await api.get('/line-of-sight', {
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params: { lat, lon, direction, tolerance }
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});
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return response;
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};
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export const healthCheck = async () => {
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const response = await api.get('/health');
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return response;
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};
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export default { getLineOfSight, healthCheck };
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.app-container {
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display: flex;
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height: 100vh;
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width: 100vw;
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overflow: hidden;
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}
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.map-container {
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flex: 1;
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height: 100%;
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position: relative;
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z-index: 1;
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}
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.controls {
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width: 350px;
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background: white;
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padding: 20px;
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box-shadow: -2px 0 10px rgba(0,0,0,0.1);
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overflow-y: auto;
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z-index: 2;
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}
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.control-group {
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background: #f8f9fa;
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padding: 15px;
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border-radius: 8px;
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margin-bottom: 20px;
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}
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.control-group h3 {
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margin-top: 0;
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color: #2c3e50;
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font-size: 16px;
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margin-bottom: 15px;
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}
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.setting-row {
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display: flex;
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align-items: center;
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margin-bottom: 12px;
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gap: 10px;
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}
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.setting-row label {
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flex: 1;
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font-size: 14px;
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color: #555;
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}
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.setting-row input[type="range"] {
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flex: 2;
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}
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.setting-row input[type="number"] {
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width: 80px;
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padding: 5px;
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border: 1px solid #ddd;
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border-radius: 4px;
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}
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.setting-row span {
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font-weight: bold;
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color: #2c3e50;
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}
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.setting-row button {
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padding: 6px 12px;
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margin: 0 5px;
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border: 1px solid #ddd;
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background: white;
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border-radius: 4px;
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cursor: pointer;
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transition: all 0.2s;
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}
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.setting-row button:hover {
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background: #e9ecef;
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}
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.action-btn {
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width: 100%;
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padding: 12px;
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background: #4CAF50;
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color: white;
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border: none;
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border-radius: 6px;
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font-size: 16px;
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font-weight: bold;
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cursor: pointer;
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transition: background 0.3s;
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margin-top: 10px;
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}
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.action-btn:hover:not(:disabled) {
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background: #45a049;
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}
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.action-btn:disabled {
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background: #ccc;
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cursor: not-allowed;
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}
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.results-panel {
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background: #f8f9fa;
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padding: 15px;
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border-radius: 8px;
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margin-bottom: 20px;
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}
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.results-panel h3 {
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margin-top: 0;
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color: #2c3e50;
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font-size: 16px;
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margin-bottom: 15px;
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}
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.results-panel table {
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width: 100%;
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border-collapse: collapse;
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font-size: 13px;
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}
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.results-panel th {
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background: #34495e;
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color: white;
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padding: 10px;
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text-align: left;
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}
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.results-panel td {
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padding: 8px;
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border-bottom: 1px solid #ddd;
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}
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.results-panel tr:nth-child(even) {
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background: #f8f9fa;
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}
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.results-panel tr:hover {
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background: #e9ecef;
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}
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.more-info {
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color: #666;
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font-size: 12px;
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text-align: center;
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margin-top: 10px;
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}
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.instructions {
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background: #fff3cd;
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padding: 15px;
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border-radius: 8px;
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border-left: 4px solid #ffc107;
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}
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.instructions h3 {
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margin-top: 0;
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color: #856404;
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font-size: 16px;
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}
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.instructions ol {
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margin: 0;
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padding-left: 20px;
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font-size: 13px;
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color: #856404;
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}
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.instructions li {
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margin-bottom: 8px;
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}
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.city-marker {
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display: flex;
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flex-direction: column;
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align-items: center;
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font-family: sans-serif;
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}
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.marker-dot {
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width: 12px;
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height: 12px;
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background: #e74c3c;
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border: 2px solid white;
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border-radius: 50%;
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box-shadow: 0 2px 4px rgba(0,0,0,0.3);
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}
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.marker-label {
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background: white;
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padding: 4px 8px;
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border-radius: 4px;
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font-size: 11px;
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font-weight: bold;
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box-shadow: 0 2px 4px rgba(0,0,0,0.2);
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margin-top: 2px;
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white-space: nowrap;
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}
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.marker-pop {
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background: #34495e;
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color: white;
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padding: 2px 6px;
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border-radius: 4px;
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font-size: 10px;
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margin-top: 2px;
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white-space: nowrap;
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}
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@media (max-width: 768px) {
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.app-container {
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flex-direction: column;
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}
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.controls {
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width: 100%;
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max-height: 40vh;
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order: -1;
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}
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.map-container {
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height: 60vh;
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}
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}
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@@ -0,0 +1,14 @@
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* {
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box-sizing: border-box;
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}
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body {
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margin: 0;
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padding: 0;
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font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
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background: #f5f5f5;
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}
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#root {
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height: 100vh;
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}
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Reference in New Issue
Block a user