Public
HTTP
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// This approach uses the Sunset and Sunrise API to get sunset times for New York,
// and creates a simple form to generate a calendar of events occurring before sunset.
async function server(request: Request): Promise<Response> {
try {
const url = new URL(request.url);
if (url.pathname === "/generate-calendar") {
const action = url.searchParams.get("action");
const minutesBefore = parseInt(url.searchParams.get("minutesBefore"));
const endDate = new Date(url.searchParams.get("endDate"));
if (!action || isNaN(minutesBefore) || isNaN(endDate.getTime())) {
return new Response("Invalid input parameters", { status: 400 });
}
console.log(`Generating calendar for action: ${action}, minutes before: ${minutesBefore}, end date: ${endDate}`);
const events = await generateSunsetEvents(action, minutesBefore, endDate);
console.log(`Generated ${events.length} events`);
const { createEvents } = await import("https://esm.sh/ics@3.1.0");
const { error, value } = createEvents(events);
if (error) {
console.error("Error creating events:", error);
return new Response("Error generating calendar", { status: 500 });
}
if (!value) {
console.error("No value returned from createEvents");
return new Response("Error generating calendar", { status: 500 });
}
return new Response(value, {
headers: {
"Content-Type": "text/calendar",
"Content-Disposition": "attachment; filename=sunset_actions.ics"
},
});
}
return new Response(`
<html>
<head>
<title>Sunset Action Calendar</title>
<script src="https://cdn.tailwindcss.com"></script>
</head>
<body class="bg-gray-100 min-h-screen flex items-center justify-center">
<div class="bg-white p-8 rounded-lg shadow-md w-96">
<h1 class="text-2xl font-bold mb-4">Sunset Action Calendar</h1>
<form action="/generate-calendar" method="get">
<div class="mb-4">
<label class="block text-sm font-medium text-gray-700">Action:</label>
<input type="text" name="action" required class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-indigo-300 focus:ring focus:ring-indigo-200 focus:ring-opacity-50">
</div>
<div class="mb-4">
<label class="block text-sm font-medium text-gray-700">Minutes before sunset:</label>
<input type="number" name="minutesBefore" value="30" required class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-indigo-300 focus:ring focus:ring-indigo-200 focus:ring-opacity-50">
</div>
<div class="mb-4">
<label class="block text-sm font-medium text-gray-700">End date:</label>
<input type="date" name="endDate" required class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-indigo-300 focus:ring focus:ring-indigo-200 focus:ring-opacity-50">
</div>
<button type="submit" class="w-full bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Generate Calendar
</button>
</form>
</div>
</body>
</html>
`, {
headers: { "content-type": "text/html" },
});
} catch (error) {
console.error("Unexpected error:", error);
return new Response("An unexpected error occurred", { status: 500 });
}
}
async function generateSunsetEvents(action: string, minutesBefore: number, endDate: Date) {
const events = [];
let currentDate = new Date();
while (currentDate <= endDate) {
try {
const sunsetTime = await getSunsetTime(currentDate);
const eventTime = new Date(sunsetTime.getTime() - minutesBefore * 60000);
events.push({
start: [eventTime.getFullYear(), eventTime.getMonth() + 1, eventTime.getDate(), eventTime.getHours(), eventTime.getMinutes()],
duration: { minutes: 30 },
title: action,
description: `${action} ${minutesBefore} minutes before sunset`,
});
currentDate.setDate(currentDate.getDate() + 1);
} catch (error) {
console.error(`Error generating event for ${currentDate}:`, error);
currentDate.setDate(currentDate.getDate() + 1);