Build the Seinfeld Bathroom Finder App with the WRLD Mapping Platform

This article demonstrates building a real-time bathroom finder app using WRLD APIs and AdonisJS, inspired by a Seinfeld episode. The app helps users locate nearby public restrooms.

Key Features & Technologies:

• Real-time Location: Leverages WRLD APIs for precise location data and 3D map visualization.
• AdonisJS Backend: A Node.js framework creating a server-side API for efficient data handling and caching.
• Caching System: Improves performance by storing frequently accessed location data using AdonisJS.
• Google Distance Matrix API: Calculates distances between users and facilities for accurate results.
• Map Highlighting: Uses color-coded building highlights on the WRLD map to indicate restroom availability and ratings.
• Data Source: Utilizes the refugerestrooms.org API for public restroom information.
• Front-end Development: Employs ParcelJS for building static assets and the WRLD SDK for map integration.

The tutorial details the process of creating an AdonisJS API to cache location data and handle CORS requests. When a user's location is requested, the app first checks the cache. If no nearby data is found within a 10-meter radius, it queries the Refuge Restrooms API using the Google Distance Matrix API to determine proximity. Buildings with restrooms are then highlighted on the WRLD map, color-coded based on their ratings (green for good, red for poor). Each building displays an info card with additional details.

The article also explores potential monetization strategies, such as in-app advertising or premium features, transforming the app into a viable business. It provides a comprehensive guide to setting up the app, from server configuration to front-end development.

The complete code is available on GitHub. The tutorial covers:

• Setting up an AdonisJS server and database for caching.
• Fetching facility data from refugerestrooms.org and handling CORS.
• Integrating the Google Distance Matrix API for distance calculations.
• Highlighting buildings on the WRLD map with color-coded ratings.

The final section discusses potential business models for the app, including advertising and premium features. The project is a practical example of using WRLD APIs for commercial applications.

This article was sponsored by WRLD 3D. Thank you for supporting the partners who make SitePoint possible.

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