Why you can believe me

4 years of experience

Agenda

DevelopmentDevelopment DesignDesign

MVCMVC

Other important questions

Other important questions

Code optimizationCode optimization

The most popular mistakes!

Joomla Components development

Model-View-Controller

How many timesdid you see this?

ModelModel

ViewView Controller

Controller

UserUser

updates manipulates

sees uses

An application is split by 3 departments which collaborate with each other to bring you the best results, but they don’t “disturb each other” at the same time!

MVC Controller

The controller isthe boss!

You should use a controller for

Getting request data;

Getting model & view

instances;

Updating model states;

Calling model action

methods (e.g. delete, save,

remove);

Calling view methods to

render a template.

You should not use a controller for

Database task;

Manipulating model data;

Rendering templates.

model & view tasks

A Controller in Joomla

JController

display() method revealed

/libraries/joomla/application/component/controller.php

Gets view instance

Gets view instance

Gets model

instance

Gets model

instance

Injects model

into view

Injects model

into view

Calls view’s

display() method

Calls view’s

display() method

Bad approaches for usingcontrollers in Joomla

Good approaches for usingcontrollers in Joomla

Bad approaches for usingcontrollers in Joomla

Good approaches for usingcontrollers in Joomla

MVC Model

A model is a hard worker!

You should use a model for

Storing a state;

Performing database tasks;

Formatting data;

All other data task.

You should not use a model for

Getting request data;

Rendering templates.

controller & view tasks

A Model in Joomla

JModel

The most unused model methods & properties.Why?

$this->_db

$this->_state

$this->getDBO();

$this->setState($property,

$value);

$this-

>getState($property);

Bad approaches for usingmodels in Joomla

Good approaches for usingmodels in Joomla

Fat Model, Skinny Controller http://blog.astrumfutura.com/archives/373-The_M_in_MV

C_Why_Models_are_Misunderstood_and_Unappreciated.html

MVC View

A view is a stylist!

You should use a view for

Rendering templates;

Rendering templates;

Rendering templates.

You should not use a view for

Database tasks;

Database tasks;

Database tasks.

model tasks

A view in Joomla

JView

lies between a model and a template

ViewViewDataData TemplateTemplate

You should use a Joomla view class for

Getting data from models;

Rearranging data (if needed);

Assigning variables to

templates;

Rendering templates.

Don’t put everything you have into a view!

Keep your view methods small!

You shouldn’t use PHP in template files like this

You should use it like this

Don’t use variables in view templates other than the ones you assigned to

Keep your templates clear, assign all variables in view classes!

Add CSS and JS in the view template file

… in this case they can be overwritten in a Joomla template

Joomla MVC revealed

Joomla MVC default task as it is

Main component’s file

Main component’s file

request

data

calls

Controller

Controller

defaulttask

calls

JController’s display()

JController’s display()

Model & view objects

Model & view objects

gets

inserts

Model into view

Model into view

callsJView’s display()

JView’s display()

getsModel data

Model data

rendersTemplate

Template

The best way to figure out the Joomla framework is to dig into the code!

No, seriously

Just diginto the code

After digging JController methods you can find out

/libraries/joomla/application/component/controller.php

How to insert other than the default model into

your view class

How to add another location for your model & view

filesHow to set a default model state

…and many more

Joomla MVC structures possible variants

Base controller approach

Base controller approach:main component file

Code Optimization

Code Optimization

Write code

Write code Go!Go!

Write a bit more code

Write a bit more code

Think over

Think over

A simple optimization

Edit, publish, unpublish, save order, order up, order down, cancel, save, remove

Edit, publish, unpublish, save order, order up, order down, cancel, save, remove

Base admin modelBase admin model

Base admin controllerBase admin controller

Base admin viewBase admin view

Helper classesHelper classes

Get ordering, save order, move, check out, check in, publish, remove

Get ordering, save order, move, check out, check in, publish, remove

The most used variables: option, document, view, controller, layout, etc.

The most used variables: option, document, view, controller, layout, etc.

Everything that can be reused in templates

Everything that can be reused in templates

Code Documentation

Document your code

http://www.phpdoc.org/ http://code.google.com/p/jsdoc-toolkit/

Every file, class, class property and method

Filter input, escape output!http://shiflett.org/blog/2005/feb/my-top-two-php-security-practices

http://developer.joomla.org/security.html

http://developer.joomla.org/security/articles-tutorials/258-preventing-sql-injections.html

Joomla Components design

We are developers,we don’t do design!

!!!!!We are developers, we don’t do design !!!!

Design principlesfor developers

Set proper CSS classes &

IDs, but leave design for

template designers

That’s all!

Thanks for coming!

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onesterov

http://onesterov.com

http://jookungfu.org

http://mindk-lab.com

nesterov.oleg@gmail.com