Azrul Rahim

Developer of JomComment & MyBlog JomSocial ( www.jomsocial.com ) 3 years of Joomla! coding experience Started with Joomla! 1.0 and now code exclusively for Joomla! 1.5 Slides co-written by Toby Patterson

Developer of

JomComment & MyBlog

JomSocial ( www.jomsocial.com )

3 years of Joomla! coding experience

Started with Joomla! 1.0 and now code exclusively for Joomla! 1.5

Slides co-written by Toby Patterson

Introduction to Joomla MVC Business logic in Joomla Examples Some useful utilities and libraries JFactory, JRequest, and others Introduction to some advance topics Error handling Internationalization

Introduction to Joomla MVC

Business logic in Joomla

Examples

Some useful utilities and libraries

JFactory, JRequest, and others

Introduction to some advance topics

Error handling

Internationalization

All component is stored in /components/ folder component/com_hello/ hello.php

All component is stored in /components/ folder

component/com_hello/

hello.php

JOOMLA 1.0 JOOMLA 1.5

JOOMLA 1.0

JOOMLA 1.5

Model – manage data and logic. All database calls should be here View – render the data from model. No business logic here please Controller – control application flow Interpret user request Trigger appropriate model Pass model to view

Model – manage data and logic.

All database calls should be here

View – render the data from model.

No business logic here please

Controller – control application flow

Interpret user request

Trigger appropriate model

Pass model to view

http://dev.joomla.org/component/option,com_jd-wiki/Itemid,/id,tutorials:components/

http://dev.joomla.org/component/option,com_jd-wiki/Itemid,/id,tutorials:components/

Minimal code here. Execute the controller

Minimal code here. Execute the controller

Process user request DO NOT Do db calls Echo anything! Pass the execution to view

Process user request

DO NOT

Do db calls

Echo anything!

Pass the execution to view

Extends JModel Your method represent business logic

Extends JModel

Your method represent business logic

Render the output Grab data from model Have direct access to the default model

Render the output

Grab data from model

Have direct access to the default model

Layout file does the final HTML output default.php nogreetings.php

Layout file does the final HTML output

Separate application control, data logic and view The important concepts to take away are: Controllers represent control logic; Models represent business/data logic; Views represent presentation logic; Layouts are for markup language.

Separate application control, data logic and view

The important concepts to take away are:

Controllers represent control logic;

Models represent business/data logic;

Views represent presentation logic;

Layouts are for markup language.

More on Joomla! API

MVC – JController, JModel , JView JRequest – grab user POST/GET/REQUEST data JText multi-language support Use JText::_ ( ) and JText::sprintf( ) JFactory - access global objects JUser – User object

MVC – JController, JModel , JView

JRequest – grab user POST/GET/REQUEST data

JText

multi-language support

Use JText::_ ( ) and JText::sprintf( )

JFactory - access global objects

JUser – User object

Implement “Factory” design pattern ::getApplication() (instead of global $mainframe) ::getDBO(); ::getDocument();

Implement “Factory” design pattern

::getApplication() (instead of global $mainframe)

::getDBO();

::getDocument();

Don’t just use JRequest::getVar( ….) ::getWord(…) ::getCmd(…) ::getString(…) ::getBool(…) ::getFloat(…) ::getInt(…)

Don’t just use JRequest::getVar( ….)

::getWord(…)

::getCmd(…)

::getString(…)

::getBool(…)

::getFloat(…)

::getInt(…)

A string is series of characters. In PHP, a character is the same as a byte , that is, there are exactly 256 different characters possible. This also implies that PHP has no native support of Unicode. From php.net, definition of a string

Ensure UTF-8 integrity Use JString:: functions JString::strlen(…) Support internationalization JText::_(…) JText::sprintf(…)

Ensure UTF-8 integrity

Use JString:: functions

JString::strlen(…)

Support internationalization

JText::_(…)

JText::sprintf(…)

DO NOT use fopen, fread … Use Joomla calls JFolder JFile JPath

DO NOT use fopen, fread …

Use Joomla calls

JFolder

JFile

JPath

Display warning message $mainframe = JFactory::getApplication(); $mainframe->enqueuMessage(‘Warning’);

Display warning message

We want to fail fast! Do not let error propagate to other part of the code

We want to fail fast!

Do not let error propagate to other part of the code

http://developer.joomla.org http://docs.joomla.org/Developers

http://developer.joomla.org

http://docs.joomla.org/Developers