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<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik;
use Exception;
/**
* Development related checks and tools. You can enable/disable development using `./console development:enable` and
* `./console development:disable`. The intention of the development mode and this class is to support the developer
* as much as possible by doing some additional checks if the development mode is enabled. For instance if a developer
* has to register any class/method we can make sure whether they actually exist and if not display a useful error
* message. This helps the user to find for instance simple typos and makes sure it will actually work even if he
* forgets to test it.
*/
class Development
{
private static $isEnabled = null;
/**
* Returns `true` if development mode is enabled and `false` otherwise.
*
* @return bool
*/
public static function isEnabled()
{
if (is_null(self::$isEnabled)) {
self::$isEnabled = (bool) Config::getInstance()->Development['enabled'];
}
return self::$isEnabled;
}
/**
* Verifies whether a className of object implements the given method. It does not check whether the given method
* is actually callable (public).
*
* @param string|object $classOrObject
* @param string $method
*
* @return bool true if the method exists, false otherwise.
*/
public static function methodExists($classOrObject, $method)
{
if (is_string($classOrObject)) {
return class_exists($classOrObject) && method_exists($classOrObject, $method);
}
return method_exists($classOrObject, $method);
}
/**
* Formats a method call depending on the given class/object and method name. It does not perform any checks whether
* does actually exists.
*
* @param string|object $classOrObject
* @param string $method
*
* @return string Formatted method call. Example: "MyNamespace\MyClassname::methodName()"
*/
public static function formatMethodCall($classOrObject, $method)
{
if (is_object($classOrObject)) {
$classOrObject = get_class($classOrObject);
}
return $classOrObject . '::' . $method . '()';
}
/**
* Checks whether the given method is actually callable on the given class/object if the development mode is
* enabled. En error will be triggered if the method does not exist or is not callable (public) containing a useful
* error message for the developer.
*
* @param string|object $classOrObject
* @param string $method
* @param string $prefixMessageIfError You can prepend any string to the error message in case the method is not
* callable.
*/
public static function checkMethodIsCallable($classOrObject, $method, $prefixMessageIfError)
{
if (!self::isEnabled()) {
return;
}
self::checkMethodExists($classOrObject, $method, $prefixMessageIfError);
if (!self::isCallableMethod($classOrObject, $method)) {
self::error($prefixMessageIfError . ' "' . self::formatMethodCall($classOrObject, $method) . '" is not callable. Please make sure to method is public');
}
}
/**
* Checks whether the given method is actually callable on the given class/object if the development mode is
* enabled. En error will be triggered if the method does not exist or is not callable (public) containing a useful
* error message for the developer.
*
* @param string|object $classOrObject
* @param string $method
* @param string $prefixMessageIfError You can prepend any string to the error message in case the method is not
* callable.
*/
public static function checkMethodExists($classOrObject, $method, $prefixMessageIfError)
{
if (!self::isEnabled()) {
return;
}
if (!self::methodExists($classOrObject, $method)) {
self::error($prefixMessageIfError . ' "' . self::formatMethodCall($classOrObject, $method) . '" does not exist. Please make sure to define such a method.');
}
}
/**
* Verify whether the given method actually exists and is callable (public).
*
* @param string|object $classOrObject
* @param string $method
* @return bool
*/
public static function isCallableMethod($classOrObject, $method)
{
if (!self::methodExists($classOrObject, $method)) {
return false;
}
$reflection = new \ReflectionMethod($classOrObject, $method);
return $reflection->isPublic();
}
/**
* Triggers an error if the development mode is enabled. Depending on the current environment / mode it will either
* log the given message or throw an exception to make sure it will be displayed in the Piwik UI.
*
* @param string $message
* @throws Exception
*/
public static function error($message)
{
if (!self::isEnabled()) {
return;
}
$message .= ' (This error is only shown in development mode)';
if (SettingsServer::isTrackerApiRequest()
|| Common::isPhpCliMode()) {
Log::error($message);
} else {
throw new Exception($message);
}
}
public static function getMethodSourceCode($className, $methodName)
{
$method = new \ReflectionMethod($className, $methodName);
$file = new \SplFileObject($method->getFileName());
$offset = $method->getStartLine() - 1;
$count = $method->getEndLine() - $method->getStartLine() + 1;
$fileIterator = new \LimitIterator($file, $offset, $count);
$methodCode = "\n " . $method->getDocComment() . "\n";
foreach($fileIterator as $line) {
$methodCode .= $line;
}
$methodCode .= "\n";
return $methodCode;
}
public static function getUseStatements($className)
{
$class = new \ReflectionClass($className);
$file = new \SplFileObject($class->getFileName());
$fileIterator = new \LimitIterator($file, 0, $class->getStartLine());
$uses = array();
foreach($fileIterator as $line) {
if (preg_match('/(\s*)use (.+)/', $line, $match)) {
$uses[] = trim($match[2]);
}
}
return $uses;
}
}
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