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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik;
use Piwik\Archive\ArchiveInvalidator;
use Piwik\Container\StaticContainer;
use Piwik\Plugin\Dependency;
use Piwik\Plugin\Manager;
use Piwik\Plugin\MetadataLoader;
if (!class_exists('Piwik\\Plugin')) {
/**
* Base class of all Plugin Descriptor classes.
*
* Any plugin that wants to add event observers to one of Piwik's {@hook # hooks},
* or has special installation/uninstallation logic must implement this class.
* Plugins that can specify everything they need to in the _plugin.json_ files,
* such as themes, don't need to implement this class.
*
* Class implementations should be named after the plugin they are a part of
* (eg, `class UserCountry extends Plugin`).
*
* ### Plugin Metadata
*
* In addition to providing a place for plugins to install/uninstall themselves
* and add event observers, this class is also responsible for loading metadata
* found in the plugin.json file.
*
* The plugin.json file must exist in the root directory of a plugin. It can
* contain the following information:
*
* - **description**: An internationalized string description of what the plugin
* does.
* - **homepage**: The URL to the plugin's website.
* - **authors**: A list of author arrays with keys for 'name', 'email' and 'homepage'
* - **license**: The license the code uses (eg, GPL, MIT, etc.).
* - **version**: The plugin version (eg, 1.0.1).
* - **theme**: `true` or `false`. If `true`, the plugin will be treated as a theme.
*
* ### Examples
*
* **How to extend**
*
* use Piwik\Common;
* use Piwik\Plugin;
* use Piwik\Db;
*
* class MyPlugin extends Plugin
* {
* public function registerEvents()
* {
* return array(
* 'API.getReportMetadata' => 'getReportMetadata',
* 'Another.event' => array(
* 'function' => 'myOtherPluginFunction',
* 'after' => true // executes this callback after others
* )
* );
* }
*
* public function install()
* {
* Db::exec("CREATE TABLE " . Common::prefixTable('mytable') . "...");
* }
*
* public function uninstall()
* {
* Db::exec("DROP TABLE IF EXISTS " . Common::prefixTable('mytable'));
* }
*
* public function getReportMetadata(&$metadata)
* {
* // ...
* }
*
* public function myOtherPluginFunction()
* {
* // ...
* }
* }
*
* @api
*/
class Plugin
{
/**
* Name of this plugin.
*
* @var string
*/
protected $pluginName;
/**
* Holds plugin metadata.
*
* @var array
*/
private $pluginInformation;
/**
* As the cache is used quite often we avoid having to create instances all the time. We reuse it which is not
* perfect but efficient. If the cache is used we need to make sure to call setId() before usage as there
* is maybe a different key set since last usage.
*
* @var \Matomo\Cache\Eager
*/
private $cache;
/**
* Constructor.
*
* @param string|bool $pluginName A plugin name to force. If not supplied, it is set
* to the last part of the class name.
* @throws \Exception If plugin metadata is defined in both the getInformation() method
* and the **plugin.json** file.
*/
public function __construct($pluginName = false)
{
if (empty($pluginName)) {
$pluginName = explode('\\', get_class($this));
$pluginName = end($pluginName);
}
$this->pluginName = $pluginName;
$cacheId = 'Plugin' . $pluginName . 'Metadata';
$cache = \Piwik\Cache::getEagerCache();
if ($cache->contains($cacheId)) {
$this->pluginInformation = $cache->fetch($cacheId);
} else {
$this->reloadPluginInformation();
$cache->save($cacheId, $this->pluginInformation);
}
}
public function reloadPluginInformation()
{
$metadataLoader = new MetadataLoader($this->pluginName);
$this->pluginInformation = $metadataLoader->load();
if ($this->hasDefinedPluginInformationInPluginClass() && $metadataLoader->hasPluginJson()) {
throw new \Exception('Plugin ' . $this->pluginName . ' has defined the method getInformation() and as well as having a plugin.json file. Please delete the getInformation() method from the plugin class. Alternatively, you may delete the plugin directory from plugins/' . $this->pluginName);
}
}
private function createCacheIfNeeded()
{
if (is_null($this->cache)) {
$this->cache = \Piwik\Cache::getEagerCache();
}
}
private function hasDefinedPluginInformationInPluginClass()
{
$myClassName = \Piwik\Plugin::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 plugin information, including:
*
* - '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
* - '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 $this->pluginInformation;
}
public final function isPremiumFeature()
{
return !empty($this->pluginInformation['price']['base']);
}
/**
* Return true here if you want your plugin's Vue module to be loaded on demand, when it is first
* referenced, rather than on page load. This can be used to improve initial page load time,
* especially if your plugin includes a lot of Vue code.
*
* Note: doing this means that any other plugins that depend on yours will no longer
* be able to do a normal `import ... from 'MyPlugin';`, they will instead have to
* use the `importPluginUmd()` function in `CoreHome` which returns a Promise.
*
* @return boolean
*/
public function shouldLoadUmdOnDemand()
{
return false;
}
/**
* Returns a list of events with associated event observers.
*
* Derived classes should use this method to associate callbacks with events.
*
* @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
* )
* )
* @since 2.15.0
*/
public function registerEvents()
{
return array();
}
/**
* This method is executed after a plugin is loaded and translations are registered.
* Useful for initialization code that uses translated strings.
*/
public function postLoad()
{
return;
}
/**
* Defines whether the whole plugin requires a working internet connection
* If set to true, the plugin will be automatically unloaded if `enable_internet_features` is 0,
* even if the plugin is activated
*
* @return bool
*/
public function requiresInternetConnection()
{
return false;
}
/**
* Installs the plugin. Derived classes should implement this class if the plugin
* needs to:
*
* - create tables
* - update existing tables
* - etc.
*
* @throws \Exception if installation of fails for some reason.
*/
public function install()
{
return;
}
/**
* Uninstalls the plugins. Derived classes should implement this method if the changes
* made in {@link install()} need to be undone during uninstallation.
*
* In most cases, if you have an {@link install()} method, you should provide
* an {@link uninstall()} method.
*
* @throws \Exception if uninstallation of fails for some reason.
*/
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
*/
public final function getVersion()
{
$info = $this->getInformation();
return $info['version'];
}
/**
* Returns `true` if this plugin is a theme, `false` if otherwise.
*
* @return bool
*/
public function isTheme()
{
$info = $this->getInformation();
return !empty($info['theme']) && (bool) $info['theme'];
}
/**
* Returns the plugin's base class name without the namespace,
* e.g., `"UserCountry"` when the plugin class is `"Piwik\Plugins\UserCountry\UserCountry"`.
*
* @return string
*/
public final function getPluginName()
{
return $this->pluginName;
}
/**
* Tries to find a component such as a Menu or Tasks within this plugin.
*
* @param string $componentName The name of the component you want to look for. In case you request a
* component named 'Menu' it'll look for a file named 'Menu.php' within the
* root of the plugin folder that implements a class named
* Piwik\Plugin\$PluginName\Menu . If such a file exists but does not implement
* this class it'll silently ignored.
* @param string $expectedSubclass If not empty, a check will be performed whether a found file extends the
* given subclass. If the requested file exists but does not extend this class
* a warning will be shown to advice a developer to extend this certain class.
*
* @return string|null Null if the requested component does not exist or an instance of the found
* component.
*/
public function findComponent($componentName, $expectedSubclass)
{
$this->createCacheIfNeeded();
$cacheId = 'Plugin' . $this->pluginName . $componentName . $expectedSubclass;
$pluginsDir = Manager::getPluginDirectory($this->pluginName);
$componentFile = sprintf('%s/%s.php', $pluginsDir, $componentName);
if ($this->cache->contains($cacheId)) {
$classname = $this->cache->fetch($cacheId);
if (empty($classname)) {
return null;
// might by "false" in case has no menu, widget, ...
}
if (file_exists($componentFile)) {
include_once $componentFile;
}
} else {
$this->cache->save($cacheId, false);
// prevent from trying to load over and over again for instance if there is no Menu for a plugin
if (!file_exists($componentFile)) {
return null;
}
require_once $componentFile;
$classname = sprintf('Piwik\\Plugins\\%s\\%s', $this->pluginName, $componentName);
if (!class_exists($classname)) {
return null;
}
if (!empty($expectedSubclass) && !is_subclass_of($classname, $expectedSubclass)) {
\Piwik\Log::warning(sprintf('Cannot use component %s for plugin %s, class %s does not extend %s', $componentName, $this->pluginName, $classname, $expectedSubclass));
return null;
}
$this->cache->save($cacheId, $classname);
}
return $classname;
}
public function findMultipleComponents($directoryWithinPlugin, $expectedSubclass)
{
$this->createCacheIfNeeded();
$cacheId = 'Plugin' . $this->pluginName . $directoryWithinPlugin . $expectedSubclass;
if ($this->cache->contains($cacheId)) {
$components = $this->cache->fetch($cacheId);
if ($this->includeComponents($components)) {
return $components;
} else {
// problem including one cached file, refresh cache
}
}
$components = $this->doFindMultipleComponents($directoryWithinPlugin, $expectedSubclass);
$this->cache->save($cacheId, $components);
return $components;
}
/**
* Detect whether there are any missing dependencies.
*
* @param null $piwikVersion Defaults to the current Piwik version
* @return bool
*/
public function hasMissingDependencies($piwikVersion = null)
{
$requirements = $this->getMissingDependencies($piwikVersion);
return !empty($requirements);
}
public function getMissingDependencies($piwikVersion = null)
{
if (empty($this->pluginInformation['require'])) {
return array();
}
$dependency = $this->makeDependency($piwikVersion);
return $dependency->getMissingDependencies($this->pluginInformation['require']);
}
/**
* Returns a string (translated) describing the missing requirements for this plugin and the given Piwik version
*
* @param string $piwikVersion
* @return string "AnonymousPiwikUsageMeasurement requires PIWIK >=3.0.0"
*/
public function getMissingDependenciesAsString($piwikVersion = null)
{
if ($this->requiresInternetConnection() && !\Piwik\SettingsPiwik::isInternetEnabled()) {
return \Piwik\Piwik::translate('CorePluginsAdmin_PluginRequiresInternet');
}
if (empty($this->pluginInformation['require'])) {
return '';
}
$dependency = $this->makeDependency($piwikVersion);
$missingDependencies = $dependency->getMissingDependencies($this->pluginInformation['require']);
if (empty($missingDependencies)) {
return '';
}
$causedBy = array();
foreach ($missingDependencies as $dependency) {
$causedBy[] = ucfirst($dependency['requirement']) . ' ' . $dependency['causedBy'];
}
return \Piwik\Piwik::translate("CorePluginsAdmin_PluginRequirement", array($this->getPluginName(), implode(', ', $causedBy)));
}
/**
* Schedules re-archiving of this plugin's reports from when this plugin was last
* deactivated to now. If the last time core:archive was run is earlier than the
* plugin's last deactivation time, then we use that time instead.
*
* Note: this only works for CLI archiving setups.
*
* Note: the time frame is limited by the `[General] rearchive_reports_in_past_last_n_months`
* INI config value.
*
* @throws \Piwik\Exception\DI\DependencyException
* @throws \Piwik\Exception\DI\NotFoundException
*/
public function schedulePluginReArchiving()
{
$lastDeactivationTime = $this->getPluginLastDeactivationTime();
$dateTime = null;
$lastCronArchiveTime = (int) \Piwik\Option::get(\Piwik\CronArchive::OPTION_ARCHIVING_FINISHED_TS);
if (empty($lastCronArchiveTime)) {
$dateTime = $lastDeactivationTime;
} else {
if (empty($lastDeactivationTime)) {
$dateTime = null;
// use default earliest time
} else {
$lastCronArchiveTime = \Piwik\Date::factory($lastCronArchiveTime);
$dateTime = $lastDeactivationTime->isEarlier($lastCronArchiveTime) ? $lastDeactivationTime : $lastCronArchiveTime;
}
}
if (empty($dateTime)) {
// sanity check
$dateTime = null;
}
$archiveInvalidator = StaticContainer::get(ArchiveInvalidator::class);
$archiveInvalidator->scheduleReArchiving('all', $this->getPluginName(), $report = null, $dateTime);
}
/**
* Extracts the plugin name from a backtrace array. Returns `false` if we can't find one.
*
* @param array $backtrace The result of {@link debug_backtrace()} or
* [Exception::getTrace()](http://www.php.net/manual/en/exception.gettrace.php).
* @return string|false
*/
public static function getPluginNameFromBacktrace($backtrace)
{
foreach ($backtrace as $tracepoint) {
// try and discern the plugin name
if (isset($tracepoint['class'])) {
$className = self::getPluginNameFromNamespace($tracepoint['class']);
if ($className) {
return $className;
}
}
}
return false;
}
/**
* Extracts the plugin name from a namespace name or a fully qualified class name. Returns `false`
* if we can't find one.
*
* @param string $namespaceOrClassName The namespace or class string.
* @return string|false
*/
public static function getPluginNameFromNamespace($namespaceOrClassName)
{
if ($namespaceOrClassName && preg_match("/Piwik\\\\Plugins\\\\([a-zA-Z_0-9]+)\\\\/", $namespaceOrClassName, $matches)) {
return $matches[1];
} else {
return false;
}
}
/**
* Override this method in your plugin class if you want your plugin to be loaded during tracking.
*
* Note: If you define your own dimension or handle a tracker event, your plugin will automatically
* be detected as a tracker plugin.
*
* @return bool
* @internal
*/
public function isTrackerPlugin()
{
return false;
}
/**
* @return Date|null
* @throws \Exception
*/
public function getPluginLastActivationTime()
{
$optionName = Manager::LAST_PLUGIN_ACTIVATION_TIME_OPTION_PREFIX . $this->pluginName;
$time = \Piwik\Option::get($optionName);
if (empty($time)) {
return null;
}
return \Piwik\Date::factory((int) $time);
}
/**
* @return Date|null
* @throws \Exception
*/
public function getPluginLastDeactivationTime()
{
$optionName = Manager::LAST_PLUGIN_DEACTIVATION_TIME_OPTION_PREFIX . $this->pluginName;
$time = \Piwik\Option::get($optionName);
if (empty($time)) {
return null;
}
return \Piwik\Date::factory((int) $time);
}
/**
* @param $directoryWithinPlugin
* @param $expectedSubclass
* @return array
*/
private function doFindMultipleComponents($directoryWithinPlugin, $expectedSubclass)
{
$components = array();
$pluginsDir = Manager::getPluginDirectory($this->pluginName);
$baseDir = $pluginsDir . '/' . $directoryWithinPlugin;
$files = \Piwik\Filesystem::globr($baseDir, '*.php');
foreach ($files as $file) {
require_once $file;
$fileName = str_replace(array($baseDir . '/', '.php'), '', $file);
$klassName = sprintf('Piwik\\Plugins\\%s\\%s\\%s', $this->pluginName, str_replace('/', '\\', $directoryWithinPlugin), str_replace('/', '\\', $fileName));
if (!class_exists($klassName)) {
continue;
}
if (!empty($expectedSubclass) && !is_subclass_of($klassName, $expectedSubclass)) {
continue;
}
$klass = new \ReflectionClass($klassName);
if ($klass->isAbstract()) {
continue;
}
$components[$file] = $klassName;
}
return $components;
}
/**
* @param $components
* @return bool true if all files were included, false if any file cannot be read
*/
private function includeComponents($components)
{
foreach ($components as $file => $klass) {
if (!is_readable($file)) {
return false;
}
}
foreach ($components as $file => $klass) {
include_once $file;
}
return true;
}
/**
* @param $piwikVersion
* @return Dependency
*/
private function makeDependency($piwikVersion)
{
$dependency = new Dependency();
if (!is_null($piwikVersion)) {
$dependency->setPiwikVersion($piwikVersion);
}
return $dependency;
}
/**
* Get all changes for this plugin
*
* @return array Array of changes
* [{"title":"abc","description":"xyz","linkName":"def","link":"https://link","version":"1.2.3"}]
*/
public function getChanges()
{
$file = Manager::getPluginDirectory($this->pluginName) . '/changes.json';
if (file_exists($file)) {
$json = file_get_contents($file);
if ($json) {
$changes = json_decode($json, true);
if ($changes && is_array($changes)) {
return array_reverse($changes);
}
}
}
return [];
}
}
}