Book Image

Catalyst 5.8: the Perl MVC Framework

By : Antano Solar John
Book Image

Catalyst 5.8: the Perl MVC Framework

By: Antano Solar John

Overview of this book

<p>Many web applications are implemented in a way that makes developing them difficult and repetitive. Catalyst is an open source Perl-based Model-View-Controller framework that aims to solve this problem by reorganizing your web application to design and implement it in a natural, maintainable, and testable manner, making web development fun, fast, and rewarding.<br /><br />This book teaches you how to use Catalyst to weave the various components involved in a web application, using methods and tools you personally prefer along with recommendations and details on the most popularly used objects like the DBIX ORM, TT2 Template, and Moose.<br /><br />This book will take you from how the MVC pattern simplifies creating quality applications to how Catalyst allows you to tap this power instantly. It explains advanced design patterns and concludes with the improvements that Moose brings to all this. It also incorporates valuable suggestions and feedback received from the community members and our customers. By the end of the book, you will be able to build clean, scalable, and extendable web applications. This book embodies Catalyst's philosophies of Do It Yourself and Don't Repeat Yourself.</p>
Table of Contents (16 chapters)
Catalyst 5.8
Credits
About the Author
About the Reviewer
Preface
7
Hot Web Topics
Index

The application


The application we'll be building in this chapter is called ChatStat and arises from a need to track the opinions of irc.perl.org denizens. A common convention on irc.perl.org is to add ++ or -- and a quip after a word. These one-liners are usually amusing and deserve to live on after they've scrolled off the screen. So, we'll write a Catalyst application to make this data available on the Web.

Following is a glimpse of what you are going to build:

  • Best/worst/most controversial and least controversial topic listing:

  • Reasons for being loved and hated for a single item:

  • Reasons for ups and downs (chained actions just like the previous):

Background

Before we set up the data model, it's important to understand what data we need to keep track of. The most important piece of data to track is the actual opinions from the IRC channel. A complete opinion on IRC looks something like the following:

(on #channel) < nickname> (some thing)++ # things are good 

Here we see nickname saying...