Book Image

Opa Application Development

By : Li Wenbo
Book Image

Opa Application Development

By: Li Wenbo

Overview of this book

Opa is a full-stack Open Source web development framework for JavaScript that lets you write secure and scalable web applications. It generates standard Node.js/MongoDB applications, natively supports HTML5 and CSS and automates many aspects of modern web application programming. It handles all aspects of web programming written in one consistent language and compiled to web standards.Opa Application Development is a practical,hands-on guide that provides you with a number of step-by-step exercises. It covers almost all aspects of developing a web application with Opa, which will help you take advantage of the real power of Opa, as well as building a secure, powerful web application rapidly.Opa Application Development dives into all concepts and components required to build a web application with Opa. The first half of this book shows you all of the basic building blocks that you will need to develop an Opa application, including the syntax of Opa, web development aspects, client and server communication and slicing, plugin, database, and so on. By the end of the book you will have yourself created a complete web application along with a game: Pacman!
Table of Contents (18 chapters)
Opa Application Development
About the Author
About the Reviewers

The project structure

Create an empty Opa project with the opa create opacman command. We need to modify the project structure. Let's first have a look at the modified project structure of our Pacman game:

The following is a brief description of the project files:

  • src: The source code, ghost.opa and pacman.opa define the type of ghost and Pacman, render.opa takes charge of drawing on the canvas, and game.opa contains the game logic

  • resources: This folder contains the required resources, including images, sounds, and styles

  • resources/js: Preloadjs.min.js and soundjs.min.js are two open source JavaScript libraries and are used to preload game resources and to play sounds

  • plugins: Preloader.js is a plugin that we write to load game resources.

  • We need to rewrite the opa.conf file to include the source code in the src directory: has the following files:

    • src/game.opa

    • src/ghost.opa

    • src/pacman.opa

    • src/render.opa

We need to modify Makefile to remove database support as we do not need...