Discover how to build an event calendar app with Lovable. Our step-by-step guide offers expert tips, clear instructions, and best practices to bring your scheduling tool to life.
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Project Setup and File Structure
index.html
– This will serve as the main HTML file.assets/eventCalendar.js
– This file will contain the JavaScript code to initialize and render the event calendar.assets/eventCalendar.css
– This file will contain styles for the calendar.
Creating the Main HTML File
index.html
file.index.html
:
Event Calendar App
Adding the Event Calendar JavaScript Code
assets
folder and create a new file named eventCalendar.js
.eventCalendar.js
:
// Wait for the DOM to load before initializing the calendar
document.addEventListener('DOMContentLoaded', function() {
// Get the calendar container element
var calendarEl = document.getElementById('calendar');
// Initialize FullCalendar with basic configuration
var calendar = new FullCalendar.Calendar(calendarEl, {
initialView: 'dayGridMonth',
headerToolbar: {
left: 'prev,next today',
center: 'title',
right: 'dayGridMonth,timeGridWeek,timeGridDay'
},
// Example events; update these with your event data
events: [
{
title: 'Meeting',
start: '2023-10-07T10:30:00',
end: '2023-10-07T12:30:00'
},
{
title: 'Conference',
start: '2023-10-14',
allDay: true
}
]
});
// Render the calendar in the container
calendar.render();
});
Creating the Calendar Styles
assets
folder, create a new file named eventCalendar.css
.
/_ Basic styling for the calendar container _/
#calendar {
max-width: 900px;
margin: 40px auto;
padding: 0 10px;
}
Managing Dependencies without a Terminal
index.html
via CDN:
Testing Your Event Calendar App
<div id="calendar">
container.assets/eventCalendar.js
and assets/eventCalendar.css
) are correct.
Customizing Your Event Calendar
assets/eventCalendar.js
.assets/eventCalendar.css
as needed.
Deploying Updates
const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');
const moment = require('moment');
// Event schema definition
const EventSchema = new mongoose.Schema({
title: String,
description: String,
startTime: Date,
endTime: Date,
isRecurring: Boolean,
recurrenceRule: String // e.g., "FREQ=WEEKLY;BYDAY=MO"
});
const Event = mongoose.model('Event', EventSchema);
// Helper: Groups events by date (YYYY-MM-DD)
function groupEventsByDate(events) {
return events.reduce((acc, event) => {
const dateKey = moment(event.startTime).format('YYYY-MM-DD');
if (!acc[dateKey]) acc[dateKey] = [];
acc[dateKey].push(event);
return acc;
}, {});
}
// API endpoint: Retrieve events (both one-time and recurring) within a date range
router.get('/api/events', async (req, res) => {
try {
let { start, end } = req.query;
start = new Date(start);
end = new Date(end);
// Fetch non-recurring events in the specified range
const regularEvents = await Event.find({
isRecurring: false,
startTime: { $gte: start, $lte: end }
}).exec();
// Fetch all recurring events (to be expanded according to recurrence rules)
const recurringEventsRaw = await Event.find({ isRecurring: true }).exec();
let recurringEvents = [];
recurringEventsRaw.forEach(event => {
// For this example, assume a simple weekly recurrence
let occurrence = moment(event.startTime);
// Adjust time difference from startTime to endTime for event duration
const duration = moment(event.endTime).diff(moment(event.startTime));
while (occurrence.isBefore(end)) {
if (occurrence.isSameOrAfter(moment(start))) {
recurringEvents.push({
title: event.title,
description: event.description,
startTime: occurrence.toDate(),
endTime: moment(occurrence).add(duration, 'milliseconds').toDate(),
isRecurring: true,
recurrenceRule: event.recurrenceRule
});
}
occurrence.add(1, 'weeks');
}
});
const allEvents = regularEvents.concat(recurringEvents);
const groupedEvents = groupEventsByDate(allEvents);
res.json(groupedEvents);
} catch (err) {
res.status(500).json({ error: err.message });
}
});
module.exports = router;
const express = require('express');
const axios = require('axios');
const router = express.Router();
const CalendarEvent = require('./models/CalendarEvent'); // Mongoose model for events
// POST endpoint to synchronize events from Lovable's external API into the local database
router.post('/api/sync/lovable', async (req, res) => {
try {
const { apiToken, fromDate, toDate } = req.body;
// Build the external API URL with date range query parameters
const externalApiUrl = `https://api.lovable.com/v1/events?from=${encodeURIComponent(fromDate)}&to=${encodeURIComponent(toDate)}`;
// Setup request headers including the API token for authentication
const config = {
headers: {
'Authorization': `Bearer ${apiToken}`,
'Accept': 'application/json'
}
};
// Fetch events from the external Lovable API
const { data } = await axios.get(externalApiUrl, config);
const externalEvents = data.events;
// Transform the external event format to match local CalendarEvent schema
const eventsToSync = externalEvents.map(item => ({
title: item.event\_title,
description: item.event\_description,
startTime: new Date(item.event\_start),
endTime: new Date(item.event\_end),
externalId: item.id,
source: 'lovable'
}));
// Upsert each event in the local database
for (const event of eventsToSync) {
await CalendarEvent.findOneAndUpdate(
{ externalId: event.externalId },
event,
{ upsert: true, new: true }
);
}
res.json({ success: true, syncedCount: eventsToSync.length });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
module.exports = router;
const express = require('express');
const router = express.Router();
const moment = require('moment');
const Event = require('./models/Event'); // Mongoose model for events
// POST endpoint: Adjust an event's schedule while resolving overlaps with Lovable-sourced events
router.post('/api/events/resolve-conflicts', async (req, res) => {
try {
const { eventId, newStartTime, newEndTime } = req.body;
const proposedStart = moment(newStartTime);
const proposedEnd = moment(newEndTime);
if (!proposedStart.isValid() || !proposedEnd.isValid() || !proposedEnd.isAfter(proposedStart)) {
return res.status(400).json({ error: 'Invalid date range provided.' });
}
const event = await Event.findById(eventId);
if (!event) {
return res.status(404).json({ error: 'Event not found.' });
}
const conflictingEvents = await Event.find({
\_id: { $ne: eventId },
source: 'lovable',
startTime: { $lt: proposedEnd.toDate() },
endTime: { $gt: proposedStart.toDate() }
});
if (conflictingEvents.length > 0) {
return res.status(409).json({
error: 'Conflict detected with existing Lovable events.',
conflicts: conflictingEvents
});
}
event.startTime = proposedStart.toDate();
event.endTime = proposedEnd.toDate();
await event.save();
res.json({ success: true, event });
} catch (err) {
res.status(500).json({ error: err.message });
}
});
module.exports = router;
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Starting a new venture? Need to upgrade your web app? RapidDev builds application with your growth in mind.
Understanding the Project Requirements and Goals
Gathering Prerequisites
Planning the Application Architecture
Setting Up Your Development Environment
project-folder/
├── frontend/
│ ├── index.html
│ ├── styles.css
│ └── app.js
└── backend/
├── server.js
└── database.js
Integrating the AI Code Generator
Implementing Core Event Calendar Features
<form id="create-event">
<label for="event-title">Event Title:</label>
<input type="text" id="event-title" name="eventTitle" required>
<label for="event-date">Date:</label>
<input type="date" id="event-date" name="eventDate" required>
<label for="event-time">Time:</label>
<input type="time" id="event-time" name="eventTime" required>
<button type="submit">Create Event</button>
</form>
document.getElementById('create-event').addEventListener('submit', function(event) {
event.preventDefault();
const title = document.getElementById('event-title').value;
const date = document.getElementById('event-date').value;
const time = document.getElementById('event-time').value;
// Add functionality to create a new event using the entered data
console.log('New Event:', { title, date, time });
});
Setting Up the Back-End and Database
const express = require('express');
const app = express();
app.use(express.json());
let events = [];
app.post('/api/events', (req, res) => {
const event = req.body;
events.push(event);
res.status(201).json(event);
});
app.get('/api/events', (req, res) => {
res.json(events);
});
app.listen(3000, () => {
console.log('Server running on port 3000');
});
Testing and Debugging Your Application
Deploying Your Event Calendar App
const port = process.env.PORT || 3000;
app.listen(port, () => {
console
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