2025-04-22 00:01:38 -04:00

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JavaScript
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// door ranges
const doors = [
...Array.from({length: 138 - 124 + 1}, (_, i) => 124 + i),
...Array.from({length: 201 - 142 + 1}, (_, i) => 142 + i),
...Array.from({length: 209 - 202 + 1}, (_, i) => 202 + i),
];
// NOAA heatindex formula
function getColorFromHI(H) {
const pct = Math.min(Math.max((H - 70) / 30, 0), 1);
const r = 255;
const g = Math.round(255 * (1 - pct));
return `rgba(${r},${g},0,0.8)`;
}
function createGrid() {
const row = document.getElementById('dock-row');
doors.forEach(d => {
const sq = document.createElement('div');
sq.className = 'dock-square';
sq.dataset.door = d;
row.appendChild(sq);
});
}
// apply a new reading to its square
function colorize(door, hi) {
const sq = document.querySelector(`.dock-square[data-door="${door}"]`);
if (!sq) return;
sq.style.background = getColorFromHI(hi);
}
async function init() {
createGrid();
// initial fill
const all = await fetch('/api/readings').then(r=>r.json());
// pick latest per door
const latest = {};
all.forEach(r => { latest[r.dockDoor] = r.heatIndex; });
Object.entries(latest).forEach(([door, hi]) => colorize(door, hi));
// subscribe SSE
const es = new EventSource('/api/stream');
es.addEventListener('new-reading', e => {
const { dockDoor, heatIndex } = JSON.parse(e.data);
colorize(dockDoor, heatIndex);
});
}
document.addEventListener('DOMContentLoaded', init);