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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
* @category Piwik
* @package Piwik
*/
namespace Piwik;
use Piwik\Common;
use Piwik\Plugin\MetadataLoader;
/**
* @see Piwik\Plugin\MetadataLoader
*/
require_once PIWIK_INCLUDE_PATH . '/core/Plugin/MetadataLoader.php';
/**
* Abstract class to define a Plugin.
* Any plugin has to at least implement the abstract methods of this class.
*
* @package Piwik
*/
class Plugin
{
/**
* Name of this plugin.
*
* @var string
*/
protected $pluginName;
/**
* Holds plugin metadata.
*
* @var array
*/
private $pluginInformation;
/**
* Constructor.
*
* @param string|bool $pluginName A plugin name to force. If not supplied, it is set
* to last part of the class name.
*
* @throws \Exception
*/
public function __construct($pluginName = false)
{
if (empty($pluginName)) {
$pluginName = explode('\\', get_class($this));
$pluginName = end($pluginName);
}
$this->pluginName = $pluginName;
$metadataLoader = new MetadataLoader($pluginName);
$this->pluginInformation = $metadataLoader->load();
if ($this->hasDefinedPluginInformationInPluginClass() && $metadataLoader->hasPluginJson()) {
throw new \Exception('Plugin ' . $pluginName . ' has defined the method getInformation() and as well as having a plugin.json file. Please delete the getInformation() method from the plugin class.');
}
}
private function hasDefinedPluginInformationInPluginClass()
{
$myClassName = get_class();
$pluginClassName = get_class($this);
if ($pluginClassName == $myClassName) {
// plugin has not defined its own class
return false;
}
$foo = new \ReflectionMethod(get_class($this), 'getInformation');
$declaringClass = $foo->getDeclaringClass()->getName();
return $declaringClass != $myClassName;
}
/**
* Returns the plugin details
* - 'description' => string // 1-2 sentence description of the plugin
* - 'author' => string // plugin author
* - 'author_homepage' => string // author homepage URL (or email "mailto:youremail@example.org")
* - 'homepage' => string // plugin homepage URL
* - 'license' => string // plugin license
* - 'license_homepage' => string // license homepage URL
* - 'version' => string // plugin version number; examples and 3rd party plugins must not use Version::VERSION; 3rd party plugins must increment the version number with each plugin release
* - 'theme' => bool // Whether this plugin is a theme (a theme is a plugin, but a plugin is not necessarily a theme)
*
* @return array
*/
public function getInformation()
{
return $this->pluginInformation;
}
/**
* Returns the list of hooks registered with the methods names
*
* @return array eg, array(
* 'API.getReportMetadata' => 'myPluginFunction',
* 'Another.event' => array(
* 'function' => 'myOtherPluginFunction',
* 'after' => true // execute after callbacks w/o ordering
* )
* 'Yet.Another.event' => array(
* 'function' => 'myOtherPluginFunction',
* 'before' => true // execute before callbacks w/o ordering
* )
* )
*/
public function getListHooksRegistered()
{
return array();
}
/**
* Executed after loading plugin and registering translations
* Useful for code that uses translated strings from the plugin.
*/
public function postLoad()
{
return;
}
/**
* Install the plugin
* - create tables
* - update existing tables
* - etc.
*/
public function install()
{
return;
}
/**
* Remove the created resources during the install
*/
public function uninstall()
{
return;
}
/**
* Executed every time the plugin is enabled
*/
public function activate()
{
return;
}
/**
* Executed every time the plugin is disabled
*/
public function deactivate()
{
return;
}
/**
* Returns the plugin version number
*
* @return string
*/
final public function getVersion()
{
$info = $this->getInformation();
return $info['version'];
}
/**
* Whether this plugin is a theme
*
* @return bool
*/
final public function isTheme()
{
$info = $this->getInformation();
return !empty($info['theme']) && (bool)$info['theme'];
}
/**
* Returns the plugin's base class name without the "Piwik_" prefix,
* e.g., "UserCountry" when the plugin class is "UserCountry"
*
* @return string
*/
final public function getPluginName()
{
return $this->pluginName;
}
/**
* Extracts the plugin name from a backtrace array. Returns false if we can't find one.
*
* @param array $backtrace The result of the debug_backtrace() or Exception::getTrace().
* @return string|false
*/
public static function getPluginNameFromBacktrace($backtrace)
{
foreach ($backtrace as $tracepoint) {
// try and discern the plugin name
if (isset($tracepoint['class'])
&& preg_match("/Piwik\\\\Plugins\\\\([a-zA-Z_0-9]+)\\\\/", $tracepoint['class'], $matches)
) {
return $matches[1];
}
}
return false;
}
}
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