Getting Started
Developer Workflow
Getting Setup
- Fork the GibbonEdu/core repository on GitHub and clone a copy on your local machine.
- If you’re running cutting edge code, run the
composer install --no-dev
command to install all required libraries in your vendor folder. - Write some code and push your changes to your repo using the command line or your favourite Git GUI.
- Create a new pull request and fill in the template provided to tell us about your change.
- Be sure you’re submitting your pull request to the development branch (and not master).
- Submissions should have a changelog entry noting what was added, changed or fixed.
If you’re unsure where to begin with GitHub feel free to reach out on the Support forum or check out these great guides: makeapullrequest.com and opensource.guide
Release Schedule
We aim to release a new version every 6 months. Starting with v26, releases are every November and April. There is a string freeze one month before each release, where all interface strings fixed and shared with translators via POEditor.
Each version, stable or development, is denoted with a major semantic version (e.g., v16.0.0). Updates to a stable version are only released in the case of a security concern, and are tagged as a patch version (e.g., v16.0.1).
Branching Strategy
Gibbon uses a simple branching strategy. The current stable version is released and tagged on the Master
branch. Development branches are setup after each release and increment to the next major version (e.g., v16.0.00 to v17.0.00). The dev branch does not currently track semantic versioning, and a built-in updater handles database changes for cutting edge code.
Dependency Management
Gibbon depends on a number of libraries written and managed by other developers, which are stored in the vendor
folder. As of v22.0.00, developers will need to use PHP’s dependency manager, Composer, to install and update libraries in their vendor folder. Stable releases include a full copy of the vendor folder and do not require composer.
Development Philosophy
Our general philosophy is to make incremental, testable changes to an ongoing development branch. To keep things running smoothly—especially as we refactor the codebase—it helps to keep each new change small and self-contained.
There are a few schools running cutting edge code in production which helps to continuously test new changes before release. With this in mind, we aim to keep the development branch as stable as possible.
Pull Request & Code Review
Each pull request should contain only one new feature or improvement. Ideally, split any larger change sets into multiple PRs if they involve more than a handful of files. Long running branches with breaking changes are unlikely to be merged into the core.
Pull requests can be submitted to the current development branch and not to Master
(which is our stable release). Please take some time to describe your changes, there’s a PR template on GitHub to get you started.
Our CI robots will automatically built & test any pull requests. Our code coverage isn’t extensive yet, so a green checkmark on GitHub isn’t necessarily a green light to merge: there’ll always be a human review too.
Each pull request is reviewed by at least one Gibbon Maintainer. Complex changes may require more than one set of eyes and some hearty discussion. Focus on code readability and bite-size commits and your PRs will be in good shape to merge.
Browser Support
In general, Gibbon is designed for and tested using the recent stable versions of Chrome, Firefox, Edge, and Safari. Our aim is to support, at a minimum, the past three years of any specific major browser version. A best attempt is made to support IE versions 9 to 11, however IE is considered out of date and functionality cannot be guarunteed in the future. Alternate browsers, such as Opera and Brave, aren’t specifically tested, however alternate browsers should work with Gibbon provided they support modern HTML, CSS and JavaScript standards.
Gibbon Road Map
Shown below are some upcoming key dates in the Gibbon Development Road Map. To request new features, please use the Feature Requests category in our support forums.
- v26.0.00 (aka Joss House Bay)
- String Freeze - October 20th 2023
- Release - November 20th 2023
- v27.0.00 (aka Kadoorie Farm)
- String Freeze - April 20th 2024
- Release - May 20th 2024
- v28.0.00 (TBD)
- String Freeze - October 20th 2024
- Release - November 20th 2024
A record of all Gibbon releases since v7.0.00 can be found on the GitHub Repository.
Looking To The Future
Version 25 was a landmark release for Gibbon, representing 12 years of development, 100 code releases and over 18,000 installations across the globe, all driven by a small but committed team of volunteer developers. In reflecting on where we have been, we are excited to let you know a little more about where we are going next:
Over the past few years we have been working with lawyers, accountants and advisors to set up the Gibbon Foundation, a non-profit entity incorporated in Hong Kong. Although this work remains underway, our hope is that within 6 months it will be ready to provide a secure legal framework for the ongoing development of Gibbon, with a focus on community development, intellectual property, advocacy and fundraising. This marks a major landmark in Gibbon’s transition from a “two-person band” (Sandra and Ross) to a sustainable, global project.
After many years of January/June releases, we have adjusted our release roadmap from v26 onward, to begin releasing in November/April instead. This means v26 will be an extended development cycle, releasing November 20, 2023.
For Gibbon v26 (Joss House Bay), rather than adding new features, we will be focusing our spotlight on stablising the Gibbon codebase, improving our documentation, and supporting our growing community. In the same way that an agricultural field requires fallow time to maintain its fruitfulness, so do open source projects!
Coding Standards
General
- Avoid PHP Shortcodes - as of v8.0.00 Gibbon is moving away from
<?
in favour of<?php
.
Security
- When using
isActionAccessible()
, always hard code the address, rather than relying on session, get, post or server variables. - For database connections, use the PDO class (instead of the more common mysql one), and parameterise any user-generated inputs. With PDO’s parameters, you do not need to escape your input.
Code Style
Borrowed from Symfony: http://symfony.com/doc/current/contributing/code/standards.html
Gibbon follows the standards defined in the PSR-0, PSR-1, PSR-2 and PSR-4 documents.
Since a picture - or some code - is worth a thousand words, here’s a short example containing most features described below:
<?php
/*
Gibbon, Flexible & Open School System
Copyright (C) 2010, Ross Parker
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
namespace Acme;
/**
* Coding standards demonstration.
*/
class FooBar
{
const SOME_CONST = 42;
/**
* @var string
*/
private $fooBar;
/**
* @param string $dummy Some argument description
*/
public function __construct($dummy)
{
$this->fooBar = $this->transformText($dummy);
}
/**
* @return string
*
* @deprecated
*/
public function someDeprecatedMethod()
{
@trigger_error(sprintf('The %s() method is deprecated since version 2.8 and will be removed in 3.0. Use Acme\Baz::someMethod() instead.', __METHOD__), E_USER_DEPRECATED);
return Baz::someMethod();
}
/**
* Transforms the input given as first argument.
*
* @param bool|string $dummy Some argument description
* @param array $options An options collection to be used within the transformation
*
* @return string|null The transformed input
*
* @throws \RuntimeException When an invalid option is provided
*/
private function transformText($dummy, array $options = array())
{
$defaultOptions = array(
'some_default' => 'values',
'another_default' => 'more values',
);
foreach ($options as $option) {
if (!in_array($option, $defaultOptions)) {
throw new \RuntimeException(sprintf('Unrecognized option "%s"', $option));
}
}
$mergedOptions = array_merge(
$defaultOptions,
$options
);
if (true === $dummy) {
return null;
}
if ('string' === $dummy) {
if ('values' === $mergedOptions['some_default']) {
return substr($dummy, 0, 5);
}
return ucwords($dummy);
}
}
/**
* Performs some basic check for a given value.
*
* @param mixed $value Some value to check against
* @param bool $theSwitch Some switch to control the method's flow
*
* @return bool|void The resultant check if $theSwitch isn't false, void otherwise
*/
private function reverseBoolean($value = null, $theSwitch = false)
{
if (!$theSwitch) {
return;
}
return !$value;
}
}
Structure
- Add a single space after each comma delimiter;
- Add a single space around binary operators (==, &&, …), with the exception of the concatenation (.) operator;
- Place unary operators (!, –, …) adjacent to the affected variable;
- Always use identical comparison unless you need type juggling;
- Use Yoda conditions when checking a variable against an expression to avoid an accidental assignment inside the condition statement (this applies to ==, !=, ===, and !==);
- Add a comma after each array item in a multi-line array, even after the last one;
- Add a blank line before return statements, unless the return is alone inside a statement-group (like an if statement);
- Use return null; when a function explicitly returns null values and use return; when the function returns void values;
- Use braces to indicate control structure body regardless of the number of statements it contains;
- Define one class per file - this does not apply to private helper classes that are not intended to be instantiated from the outside and thus are not concerned by the PSR-0 and PSR-4 autoload standards;
- Declare the class inheritance and all the implemented interfaces on the same line as the class name;
- Declare class properties before methods;
- Declare public methods first, then protected ones and finally private ones. The exceptions to this rule are the class constructor and the setUp and tearDown methods of PHPUnit tests, which must always be the first methods to increase readability;
- Declare all the arguments on the same line as the method/function name, no matter how many arguments there are;
- Use parentheses when instantiating classes regardless of the number of arguments the constructor has;
- Exception and error message strings must be concatenated using sprintf;
- Calls to trigger_error with type E_USER_DEPRECATED must be switched to opt-in via @ operator. Read more at Deprecations;
- Do not use else, elseif, break after if and case conditions which return or throw something;
- Do not use spaces around
[
offset accessor and before]
offset accessor.
Naming Conventions
- Use camelCase, not underscores, for variable, function and method names, arguments;
- Use underscores for option names and parameter names;
- Use namespaces for all classes;
- Prefix abstract classes with Abstract;
- Suffix interfaces with Interface;
- Suffix traits with Trait;
- Suffix exceptions with Exception;
- Use alphanumeric characters and underscores for file names;
- For type-hinting in PHPDocs and casting, use bool (instead of boolean or Boolean), int (instead of integer), float (instead of double or real);
- Don’t forget to look at the more verbose Conventions document for more subjective naming considerations.
Service Naming Conventions
- A service name contains groups, separated by dots;
- The DI alias of the bundle is the first group (e.g. fos_user);
- Use lowercase letters for service and parameter names;
- A group name uses the underscore notation.
Documentation
- Add PHPDoc blocks for all classes, methods, and functions;
- Group annotations together so that annotations of the same type immediately follow each other, and annotations of a different type are separated by a single blank line;
- Omit the @return tag if the method does not return anything;
- The @package and @subpackage annotations are not used.
License
- Gibbon is released under the GNU General Public License, and the license block has to be present at the top of every PHP file, before the namespace.
Module Development
If you are interested in developing a module for Gibbon, use the instructions below. Contact support@gibbonedu.org if you are stuck.
Module Basics
Modules are the easiest way to extend Gibbon without having to hack the core, and risk losing your changes on upgrade. Each module provides one or more actions, and each action can be assigned to user roles through a system of permissions. Modules can be installed, updated and uninstalled.
Starter Module
Download or fork the starter module and use it to begin coding up a module. Remove or replace the GNU GPL statement depending on your needs. The starter module consists of:
- CHANGEDB.php - stores database changes for each version of the module, used in upgrades.
- CHANGELOG.txt - list of changes per version
- css/module.css - CSS file loaded up by the core for the module, allowing for per-module styling
- img - a space to store any images for the module
- index.php - a sample landing page. Replace isModuleAvailable() with isActionAvailable() if you want to test for access to a specific action rather than the whole system.
- js/module.js - JavaScript file loaded up by the core for the module, allowing for per-module scripting
- manifest.php - used to install the software, creates all actions, permissions, tables, settings, etc
- moduleFunctions.php - a place for any module-specific PHP functions
- version.php - the version number for the code (as opposed to the database version number, the difference between is used in the upgrade progress).
- src/Domain/ - a directory containing any module-specific QueryableGateways you may have. These are auto-loaded and so can be referenced simply through their namespace. The namespace format used should be “Gibbon\Module<modulename>\Domain” where the
is the manifest.php file’s $name value without spaces.
Module Translation
As of Gibbon v13 (released on January 20th 2016), additional modules are translatable. v4.5.00 of the Free Learning module is available as a model to demonstrate how module translation works (it is not yet translated, but can be). To prepare a module for translation:
- Add a/i18n folder into the module root, and include sub folders for each language, as follows:
- /i18n
- es_ES
- LC_MESSAGES
- es_ES
- /i18n
- The LC_MESSAGES subfolder for each language should contain a PO and an MO file (using the GNU GetText system), each named with the module name (e.g. Free Learning.po and Free Learning.mo)
- The manifest.php file should have a Translatables section, with one entry for each string from the database that is not in module’s (such as action descriptions), marking them for translation:
- e.g.
__($guid, 'Allows a user to browse all active units.');
- e.g.
- For any translatable text in the module’s code, wrap it for translation as:
- e.g.
__($guid, $row['nameDisplay'], 'Free Learning');
where the third argument is the module name and sets the domain for translation. - This process is not yet 100% complete on the Free Learning module.
- e.g.
- In order to generate your PO file, use a variant of this xgettextGenerationCommands.sh shell script
- This script could be improved by filtering on the domain in
__()
, so as to ignore any strings that already exist in gibbon.PO, and so need not be retranslated. Any takers?
- This script could be improved by filtering on the domain in
The PO file can now be translated, and the resulting MO file produced. Installing and using such a module should lead to the relevant strings being translated.
Module Hooks
The Gibbon Core provides three hooks, which allow additional modules to insert data into the interface of the Core modules. These hooks are for Public Home Page, Student Profile and Unit. To use one of the hooks, your module’s manifest file must write an entry to the core database table gibbonHook, specifying:
- name - The name of the hook will be displayed in the interface: for example, a Unit hook called “IB MYP” will result in such units being labelled as “IB MYP Unit” through the system.
- type- The system currently provides the following hook types
- Parent Dashboard
- Student Dashboard
- Staff Dashboard
- Public Homepage
- Student Profile
- options- This field consists of a serialized array of options for the hook. The exact options depend on the hook, as described below:
- Parent/Student/Staff Dashboard
- sourceModuleName - the name of the source module that data is being drawn from (e.g. IB Diploma)
- sourceModuleAction - the name of the action in the source module that the user needs to have access to in order to see this data
- sourceModuleInclude - the php file to include, which spits out the data into the Parental Dashboard
- Public Home Page
- toggleSettingName - the name of the gibbonSetting setting which allows this home page element to be turned on or off
- toggleSettingScope - the scope of the gibbonSetting setting which allows this home page element to be turned on or off
- toggleSettingValue - the “on” value of the gibbonSetting setting which allows this home page element to be turned on or off
- title - the title of the section to be displayed on the public home page
- text - the text of the section to be displayed on the public home page
- Student Profile
- sourceModuleName - the name of the source module that data is being drawn from (e.g. IB Diploma)
- sourceModuleAction - the name of the action in the source module that the user needs to have access to in order to see this data
- sourceModuleInclude - the php file to include, which spits out the data into the Student Profile page
- Parent/Student/Staff Dashboard
- gibbonModuleID - This is needed to remove hooks when a module is uninstalled.
- Because the module ID is generated on install, you cannot hard code it into your module. You can use the following sql as a subquery when you create your hook insertion query:
SELECT gibbonModuleID FROM gibbonModule WHERE name='$name'
- Because the module ID is generated on install, you cannot hard code it into your module. You can use the following sql as a subquery when you create your hook insertion query:
As an example, if you want to use the Units hook, you could use the following code in your manifest, setting your own array values according to your database table design:
$array['unitTable'] = 'test';
$array['unitIDField'] = 'gibbonUnitID';
$array['unitCourseIDField'] = 'gibbonCourseID';
$array['unitNameField'] = 'name';
$array['unitDescriptionField'] = 'description';
$array['classLinkTable'] = 'testClass';
$array['classLinkJoinField'] = 'gibbonUnitID';
$array['classLinkIDField'] = 'gibbonCourseClassID';
$array['classLinkStartDateField'] = 'date';
print_r($array);