Dolphin 7 Tutorial: My First Module

1. Getting Started.

In this tutorial we will create a simple Dolphin module. In the beginning, this module will show a text page only. Then, we will add an admin section for the module. At the end we will create some basic functionality, like a blog system.

In this tutorial we will create a simple Dolphin module. In the beginning, this module will show a text page only. Then, we will add an admin section for the module. At the end we will create some basic functionality, like a blog system.

This tutorial covers things like a simple module structure, creating user pages and admin pages, creating config values for your module, forms and adding admin menu items.

The main purpose of this tutorial is to help you get started with the new Dolphin 7 modules structure and basic functionality.

To proceed with this tutorial you need:

• already installed Dolphin 7, you can get the latest Dolphin version ​here and detailed installation instructions are ​here.
• basic PHP knowlege, object oriented programming knowledge is more than welcome. You can learn about PHP ​here.
• basic MySQL queries knowledge, you can learn about MySQL server and MySQL queries syntax ​here.

The things you will not get in this tutorial:

• will not teach you PHP, MySQL, Javascript, HTML, CSS
• will not teach you how to edit and upload files to the server
• will not teach you about every Dolphin feature. There are many Dolphin features which are more complex, and mentioning them here may detract you from the main purpose of this tutorial. For a complete list of Dolphin programming features and references to the documentation in the code, check ​here.
• will not tech you how to create new templates. A templates creation guide is ​here.
• will not teach you how to translate Dolphin to other languages. A translation manual is ​here.
• will not teach security aspects of writing the code. You are responsible if you are hacked through your own module.

Learning Dolphin gives you many advantages:

• you will be able to make modifications to your site
• if you are writing a modification, especially as a Dolphin module, it will allow you to transfer your modification more easily between Dolphin version upgrades.
• you can make money by selling your modifications in ​Unity Market or offering your service for others in the same ​Unity Market.
• it will help you to get certified - because there are strict requirements if you want to certify your mod.

Let's start with the simplest thing in the beginning.

2. Simplest module.

There is a prepared zip package with the simplest Dolphin 7 module here(TODO:bloggie.zip). Download it, unpack and upload to the modules/me/ folder. Most probably there is no me folder in the modules directory, so just create it by yourself. Me is a vendor name. For the real module, you need to rename it to the real vendor name, but for now me is fine for everybody. It will be the bloggie folder in the modules/me/ directory. Bloggie is the module name. It is good practice to name the folder where module's files are located with the name of the module, it is just more clear. In the end it will be some type of blog module with the name Bloggie.

Lets describe each file in the module. This is almost the minimal set of files for the module:

bloggie/classes
directory with all module classes

bloggie/classes/MeBlggConfig.php
Module config class. In most cases you don't need to modify it - it inherits system class which has all the necessary functionality to get configuration values.

bloggie/classes/MeBlggDb.php
Module database class. It is strongly recommended that you write all SQL queries in this class only, then you can call ready functions from the code.

bloggie/classes/MeBlggModule.php
Module controller class - where the main work happens.

bloggie/classes/MeBlggTemplate.php
Module template class. You don't need to change this class. All the necessary functionality is inherited from the base class.

bloggie/install
Module installation directory, where all installation files are located, like SQL files and language files.

bloggie/install/config.php
Module installation config file. We will take a closer look at this later.

bloggie/install/info
Installation information messages folder. If you need to display information messages upon module install/uninstall, you will need to place files here - also special instructions are needed to point to in the install config file to display these messages properly.

bloggie/install/installer.php
Module installer class. You can add some custom installation scripts and override default behavior.

bloggie/install/langs
Module languages must be located in this dir. The language file name must be a php file with the name of two letters of the language code.

bloggie/install/langs/en.php
Default English language file.

bloggie/install/sql
SQL script for module install and uninstall are here.

bloggie/install/sql/install.sql
Module installation SQL file.

bloggie/install/sql/uninstall.sql
Module un-installation SQL file.

bloggie/request.php
File which routes all requests to the MeBlggModule? class. You don't need to change it in most cases.

bloggie/templates
Module templates directory. You need to place *.html, *.css and image files here, according to the structure below.

bloggie/templates/base
Base template folder. You don't need to create a separate folder for each template (but you can do that). Just place all files into the base folder, and regardless of the current chosen template, all template files will be taken from here. Also, all HTML template files are located in this folder.

bloggie/templates/base/css
CSS files must be located here.

bloggie/templates/base/images
Images files must be located here.

bloggie/templates/base/images/icons
Image icons must be located here.

bloggie/templates/base/main.html
Our custom template file.

The location of each file is important, because there are some functions to plug-in to each file automatically. If the file is not located properly, it will not be possible to plug it in easily.

The foregoing just gives you the basic view of the module's structure, and now you know where to find files to modify templates, or where all module's SQL queries are located.

Now you need to install the module via the admin panel. Go to Dolphin admin panel -> Tools -> Modules. Scroll down to the Not Installed Modules block. It will show the Bloggie version 1.0.0 by Me module here if you uploaded all the files properly. Select it and click install. The module will be installed and you will see the Installation of: Bloggie Done message in the top block of this page. To test the module open the following page:

http://www.your-site.com/your-path/m/bloggie/home

or if Apache mod rewrite is not enabled, or you don't have the .htaccess file in the Dolphin root folder for some strange reason, you can try to open the following url:

http://www.your-site.com/your-path/modules/?r=bloggie/home

The only thing this module does is to display the following message: "For a community to be whole and healthy, it must be based on people's love and concern for each other". Not so much, but it is an example of a working result, shows that you don't have any bugs and your site cannot be hacked through this page.

Now we will make some easy modifications to this page. But, before proceeding to any modifications, let's disable all template caches in the Dolphin admin panel -> Settings -> Advanced Settings -> Template. It will make life easier by saving some time for you - you don't need to clear the cache manually after each change.