document our plugin classes

git-svn-id: file:///svn/phpbb/trunk@9238 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
Meik Sievertsen 2008-12-28 10:52:09 +00:00
parent 0007692c64
commit 0c1c26e2ee

View file

@ -10,6 +10,7 @@
/**
* Class used by plugins/modules/etc. for installation/uninstallation
* @package plugins
*/
class phpbb_install
{
@ -17,24 +18,128 @@ class phpbb_install
public function uninstall() {}
}
/**
* This class holds plugin information.
* One instance will be assigned to each plugin.
* @package plugins
*/
class phpbb_plugin_structure
{
/**
* @var string The plugins plain phpBB name. This is also the directory name.
*/
public $phpbb_name;
/**
* @var string The plugins full name as the plugin defines it
*/
public $name;
/**
* @var string The plugins full description as the plugin defines it
*/
public $description;
/**
* @var string The plugins author
*/
public $author;
/**
* @var string The plugins version string
*/
public $version;
/**
* @var array The plugins defined includes
*/
public $includes = array();
/**
* @var array The plugins defined objects to plug in
*/
public $objects = array();
/**
* @var array The plugins defined hooks/functions to plug in
*/
public $functions = array();
/**
* Set up information object
*
* @param string $phpbb_name The plugins directory/simple/plain name
* @access public
*/
public function __construct($phpbb_name)
{
$this->phpbb_name = $phpbb_name;
$class = 'phpbb_' . $phpbb_name . '_info';
if (!class_exists($class))
{
trigger_error('Plugin ' . $phpbb_name . ' does not define required ' . $class . ' info class.', E_USER_ERROR);
}
$this->setup = new $class();
foreach (array('name', 'description', 'author', 'version') as $required_property)
{
if (!property_exists($this->setup, $required_property))
{
trigger_error('Plugin ' . $phpbb_name . ' does not define required property ' . $required_property . ' in info class ' . $class . '.', E_USER_ERROR);
}
$this->$required_property = $this->setup->$required_property;
}
}
}
/**
* Main class handling plugins/hooks
* @package plugins
*/
class phpbb_plugins
{
/**
* @var array required phpBB objects
*/
public $phpbb_required = array();
/**
* @var array Optional phpBB objects
*/
public $phpbb_optional = array();
/**
* @var string Plugin path plugins are searched at.
*/
public $plugin_path = false;
public $plugins = array();
/**
* @var array Collection of assigned plugins
*/
private $plugins = array();
/**
* @var array Collection of assigned hooks (functions)
*/
private $hooks = array();
/**
* Pointer to currently processed plugin.
*/
private $current_plugin = false;
/**
* Init plugins
*
* @return
* @param string $plugin_path
* Search {@link $plugin_path plugin path} for plugins and include the information for later processing.
* Plugins will not be called here, just collected.
*
* @param string $plugin_path The plugin path to search.
* @access public
*/
public function init($plugin_path)
{
@ -57,28 +162,38 @@ class phpbb_plugins
}
/**
* Add information about specific plugin
*
* @return
* @param string $phpbb_name
* @param string $name Plugin directory name
* @return bool False if plugin does not exist
* @access public
*/
public function add_plugin($phpbb_name)
public function add_plugin($name)
{
if (!file_exists($this->plugin_path . $phpbb_name . '/' . $phpbb_name . '.' . PHP_EXT))
if (!file_exists($this->plugin_path . $name . '/' . $name . '.' . PHP_EXT))
{
return false;
}
// Include desired plugin
require_once $this->plugin_path . $phpbb_name . '/' . $phpbb_name . '.' . PHP_EXT;
require_once $this->plugin_path . $name . '/' . $name . '.' . PHP_EXT;
// Create new setup for this plugin
$this->plugins[$phpbb_name] = new phpbb_plugin_structure($phpbb_name);
$this->current_plugin = $this->plugins[$phpbb_name];
$this->plugins[$name] = new phpbb_plugin_structure($name);
$this->current_plugin = $this->plugins[$name];
// Setup plugin
$this->current_plugin->setup->setup_plugin($this);
return true;
}
/**
* Setup all previously collected plugins
*
* @return bool False if there are no plugins to setup
* @access public
*/
public function setup()
{
if (empty($this->plugins))
@ -112,11 +227,13 @@ class phpbb_plugins
trigger_error('The phpBB Class ' . get_class(phpbb::get_instance($object->phpbb_plugin)) . ' defined in ' . get_class($object) . ' is not pluggable.', E_USER_ERROR);
}
// Get instance of phpBB Object to pass later
$instance = phpbb::get_instance($object->phpbb_plugin);
}
else
{
$instance = ${$object->object_plugin};
// Assign custom object...
$instance = ${$object->class_plugin};
if (!is_subclass_of($instance, 'phpbb_plugin_support'))
{
@ -126,10 +243,9 @@ class phpbb_plugins
// Setup/Register plugin...
$object->setup_plugin($instance);
// $plugin->objects[$key] = $object;
}
// Now setup the functions... this is a special case...
// Now setup hooks... this is a special case...
foreach ($plugin->functions as $params)
{
$function = array_shift($params);
@ -140,7 +256,7 @@ class phpbb_plugins
// Check if the function is already overridden.
if ($mode == phpbb::FUNCTION_OVERRIDE && isset($this->hooks[$function][$mode]))
{
trigger_error('Function ' . $function . ' is already overwriten by ' . $this->hooks[$function][$mode] . '.', E_USER_ERROR);
trigger_error('Function ' . $function . ' is already overridden by ' . $this->hooks[$function][$mode] . '.', E_USER_ERROR);
}
if ($mode == phpbb::FUNCTION_OVERRIDE)
@ -153,7 +269,7 @@ class phpbb_plugins
}
}
// Call init method?
// Call plugins init method?
if (method_exists($plugin->setup, 'init'))
{
$plugin->setup->init();
@ -161,34 +277,103 @@ class phpbb_plugins
}
}
/**
* Register files to be included on plugin setup
* Used by plugin setup
*
* @param string $arguments,... List of files to include
* @access public
*/
public function register_includes()
{
$arguments = func_get_args();
$this->current_plugin->includes = $arguments;
}
/**
* Define the plugins classes registered within the setup process.
* Used by plugin setup.
*
* @param string $arguments,... List of classes to instantiate
* @access public
*/
public function register_plugins()
{
$arguments = func_get_args();
// Make sure the class names are unique by checking for the phpbb name
foreach ($arguments as $class)
{
if (strpos($class, '_' . $this->current_plugin->phpbb_name . '_') === false)
{
trigger_error('Class ' . $class . ' has an invalid name in plugin ' . $this->current_plugin->phpbb_name . '. The class must include the name of the plugin.', E_USER_ERROR);
}
}
$this->current_plugin->objects = $arguments;
}
/**
* Define the hook setup for functions.
* Used by plugin setup.
*
* @param string $function The function name to hook into
* @param string $hook The hooks function name
* @param phpbb::FUNCTION_OVERRIDE|phpbb::FUNCTION_INJECT $mode
* If set to phpbb::FUNCTION_OVERRIDE, the hook is called instead of the function and returns the result.
* If set to phpbb::FUNCTION_INJECT (default), then the hook is called based on the $action parameter
* @param string $action Defines the hooks action. Default parameters are 'default' and 'return'.
* Other actions are defined within the relevant functions and are documented within the plugins documentation.
* 'default': This is the default action used for the first hook called, usually at the start of the function. Parameter are passed by reference.
* 'return': This is the action used to specify the hook used at the end of the function. Result is passed, returns the result.
*
* @access public
*/
public function register_function()
{
$arguments = func_get_args();
$this->current_plugin->functions[] = $arguments;
}
/**
* Checks if a specific function is overridden by a hook
* Called within functions to check if they are overridden.
*
* @param string $function The functions name, usually passed as __FUNCTION__
*
* @return bool True if the function is overridden, false if not
* @access public
*/
public function function_override($function)
{
return isset($this->hooks[$function][phpbb::FUNCTION_OVERRIDE]);
}
/**
* Checks if a specific function is injected by a hook
* Called within functions to check if they are injected.
*
* @param string $function The functions name, usually passed as __FUNCTION__
* @param string $action The action to check. Can be 'default', 'return' or any other action defined.
*
* @return bool True if the function is injected for the particular action, false if not
* @access public
*/
public function function_inject($function, $action = 'default')
{
return isset($this->hooks[$function][phpbb::FUNCTION_INJECT][$action]);
}
/**
* Call hook function overriding function.
* This is called within a function to actually override the function with the hook.
*
* @param string $function The function name, usually passed as __FUNCTION__
* @param mixed $arguments,... Optional number of arguments passed by the function to the hook
*
* @return mixed The hooks result
* @access public
*/
public function call_override()
{
$arguments = func_get_args();
@ -199,15 +384,16 @@ class phpbb_plugins
/**
* Call injected function.
* This is called within functions to call hooks for specific actions.
*
* Arguments are layed out in the following way:
* action: The action:
* 'default': If $action is default, then the hook is called in the beginning, original parameter passed by reference
* 'return': If $action is return, then the hook is called at the end and the result will be returned. The hook expects the $result as the first parameter, all other parameters passed by name
* If $action is not default and not return it could be a custom string. Please refer to the plugin documentation to determine possible combinations. Parameters are passed by reference.
* @param string $function The function name, usually passed as __FUNCTION__
* @param array $arguments Arguments passed to the hook as an array
* The first parameter is the action.
* If the action is 'return', the second parameter is the result
* The remaining parameter are the functions parameter, passed by reference if action is not 'return'.
*
* @param string $function Original function name this method is called from
* @param array $arguments Arguments
* @return mixed Returns result if action is 'return'
* @access public
*/
public function call_inject($function, $arguments)
{
@ -244,55 +430,41 @@ class phpbb_plugins
}
}
// Object used to hold plugin information. Per plugin one instance
class phpbb_plugin_structure
{
public $phpbb_name;
public $name;
public $description;
public $author;
public $version;
public $includes = array();
public $objects = array();
public $functions = array();
/**
*
* @return
* @param string $phpbb_name
*/
public function __construct($phpbb_name)
{
$this->phpbb_name = $phpbb_name;
$class = 'phpbb_' . $phpbb_name . '_info';
$this->setup = new $class();
foreach (array('name', 'description', 'author', 'version') as $required_property)
{
$this->$required_property = $this->setup->$required_property;
}
}
}
interface phpbb_plugin_info
{
public function setup_plugin(phpbb_plugins $object);
}
interface phpbb_plugin_setup
{
function setup_plugin(phpbb_plugin_support $object);
}
/**
* Plugin support class.
* Objects supporting plugins must extend this class
* @package plugins
*/
abstract class phpbb_plugin_support
{
/**
* @var array Methods injected
*/
private $plugin_methods;
/**
* @var array Attributes injected
*/
private $plugin_attributes;
public function register_method($name, $method, $object, $mode = phpbb::PLUGIN_ADD, $action = 'default')
/**
* Register a new method, overrides one or inject into one.
*
* @param string $name The method name to inject into. False if a new method is registered.
* @param string $method The hook name to use.
* @param object $object Always $this
* @param phpbb::METHOD_ADD|phpbb::METHOD_OVERRIDE|phpbb::METHOD_INJECT $mode
* If set to phpbb::METHOD_ADD (default) the $name is added as a new method for the object plugged into.
* If set to phpbb::METHOD_OVERRIDE the hook is called instead of the method and returns the result.
* If set to phpbb::METHOD_INJECT, then the hook is called based on the $action parameter
* @param string $action Defines the hooks action. Default parameters are 'default' and 'return'.
* Other actions are defined within the relevant methods and are documented within the plugins documentation.
* 'default': This is the default action used for the first hook called, usually at the start of the method. Parameter are passed by reference.
* 'return': This is the action used to specify the hook used at the end of the method. Result is passed, returns the result.
*
* @access public
*/
public function register_method($name, $method, $object, $mode = phpbb::METHOD_ADD, $action = 'default')
{
// Method reachable by:
// For plugin_add: plugin_methods[method] = object
@ -302,23 +474,23 @@ abstract class phpbb_plugin_support
// Set to PLUGIN_ADD if method does not exist
if ($name === false || !method_exists($this, $name))
{
$mode = phpbb::PLUGIN_ADD;
$mode = phpbb::METHOD_ADD;
}
// But if it exists and we try to add one, then print out an error
if ($mode == phpbb::PLUGIN_ADD && (method_exists($this, $method) || isset($this->plugin_methods[$method])))
if ($mode == phpbb::METHOD_ADD && (method_exists($this, $method) || isset($this->plugin_methods[$method])))
{
trigger_error('Method ' . $method. ' in class ' . get_class($object) . ' is not able to be added, because it conflicts with the existing method ' . $method . ' in ' . get_class($this) . '.', E_USER_ERROR);
}
// Check if the same method name is already used for $name for overriding the method.
if ($mode == phpbb::PLUGIN_OVERRIDE && isset($this->plugin_methods[$name][$mode][$method]))
if ($mode == phpbb::METHOD_OVERRIDE && isset($this->plugin_methods[$name][$mode][$method]))
{
trigger_error('Method ' . $method . ' in class ' . get_class($object) . ' is not able to override . ' . $name . ' in ' . get_class($this) . ', because it is already overridden in ' . get_class($this->plugin_methods[$name][$mode][$method]) . '.', E_USER_ERROR);
}
// Check if another method is already defined...
if ($mode == phpbb::PLUGIN_INJECT && isset($this->plugin_methods[$name][$mode][$action][$method]))
if ($mode == phpbb::METHOD_INJECT && isset($this->plugin_methods[$name][$mode][$action][$method]))
{
trigger_error('Method ' . $method . ' in class ' . get_class($object) . ' for ' . $name . ' is already defined in class ' . get_class($this->plugin_methods[$name][$mode][$action][$method]), E_USER_ERROR);
}
@ -328,11 +500,11 @@ abstract class phpbb_plugin_support
trigger_error('Method ' . $method . ' in class ' . get_class($object) . ' has invalid function signature. Please use: ' . $function_signature, E_USER_ERROR);
}
if ($mode == phpbb::PLUGIN_ADD)
if ($mode == phpbb::METHOD_ADD)
{
$this->plugin_methods[$method] = $object;
}
else if ($mode == phpbb::PLUGIN_OVERRIDE)
else if ($mode == phpbb::METHOD_OVERRIDE)
{
$this->plugin_methods[$name][$mode][$method] = $object;
}
@ -342,6 +514,15 @@ abstract class phpbb_plugin_support
}
}
/**
* Register a new attribute.
* If the attribute already exists within the object then it will be overwritten.
*
* @param string $name Attribute name to register.
* @param object $object Always $this
*
* @access public
*/
public function register_attribute($name, $object)
{
if (property_exists($this, $name))
@ -357,72 +538,10 @@ abstract class phpbb_plugin_support
$this->plugin_attributes[$name] = $object;
}
protected function method_override($name)
{
return isset($this->plugin_methods[$name][phpbb::PLUGIN_OVERRIDE]);
}
protected function method_inject($name, $action = 'default')
{
return isset($this->plugin_methods[$name][phpbb::PLUGIN_INJECT][$action]);
}
public function call_override()
{
$arguments = func_get_args();
$name = array_shift($arguments);
list($method, $object) = each($this->plugin_methods[$name][phpbb::PLUGIN_OVERRIDE]);
return call_user_func_array(array($object, $method), array_merge(array($this), $arguments));
}
/**
* Call injected method.
*
* Arguments are layed out in the following way:
* action: The action:
* 'default': If $action is default, then the plugin is called in the beginning, original parameter passed by reference
* 'return': If $action is return, then the plugin is called at the end and the result will be returned. The plugin expects the $result as the first parameter, all other parameters passed by name
* If $action is not default and not return it could be a custom string. Please refer to the plugin documentation to determine possible combinations. Parameters are passed by reference.
*
* @param string $name Original method name this method is called from
* @param array $arguments Arguments
/**#@+
* Magic method for attributes. See {@link register_attribute() register_attribute}.
* @access public
*/
public function call_inject($name, $arguments)
{
$result = NULL;
if (!is_array($arguments))
{
$action = $arguments;
$arguments = array();
}
else
{
$action = array_shift($arguments);
}
// Return action... handle like override
if ($action == 'return')
{
$result = array_shift($arguments);
foreach ($this->plugin_methods[$name][phpbb::PLUGIN_INJECT][$action] as $method => $object)
{
$args = array_merge(array($this, $result), $arguments);
$result = call_user_func_array(array($object, $method), $args);
}
return $result;
}
foreach ($this->plugin_methods[$name][phpbb::PLUGIN_INJECT][$action] as $method => $object)
{
call_user_func_array(array($object, $method), array_merge(array($this), $arguments));
}
}
// Getter/Setter
public function __get($name)
{
return $this->plugin_attributes[$name]->$name;
@ -442,13 +561,124 @@ abstract class phpbb_plugin_support
{
unset($this->plugin_attributes[$name]->$name);
}
/**#@-*/
/**
* Call added method. See {@link register_method() register_method} with phpbb::METHOD_ADD mode.
* @access public
*/
public function __call($name, $arguments)
{
array_unshift($arguments, $this);
return call_user_func_array(array($this->plugin_methods[$name], $name), $arguments);
}
/**
* Checks if a specific method is overridden by a hook
* Called within methods to check if they are overridden.
*
* @param string $name The methods name, usually passed as __FUNCTION__
*
* @return bool True if the method is overridden, false if not
* @access protected
*/
protected function method_override($name)
{
return isset($this->plugin_methods[$name][phpbb::METHOD_OVERRIDE]);
}
/**
* Checks if a specific method is injected by a hook
* Called within methods to check if they are injected.
*
* @param string $name The methods name, usually passed as __FUNCTION__
* @param string $action The action to check. Can be 'default', 'return' or any other action defined.
*
* @return bool True if the method is injected for the particular action, false if not
* @access protected
*/
protected function method_inject($name, $action = 'default')
{
return isset($this->plugin_methods[$name][phpbb::METHOD_INJECT][$action]);
}
/**
* Call hook method overriding method.
* This is called within a method to actually override the method with the hook.
*
* @param string $name The method name, usually passed as __FUNCTION__
* @param mixed $arguments,... Optional number of arguments passed by the method to the hook
*
* @return mixed The hooks result
* @access protected
*/
protected function call_override()
{
$arguments = func_get_args();
$name = array_shift($arguments);
list($method, $object) = each($this->plugin_methods[$name][phpbb::METHOD_OVERRIDE]);
return call_user_func_array(array($object, $method), array_merge(array($this), $arguments));
}
/**
* Call injected method.
* This is called within methods to call hooks for specific actions.
*
* @param string $name The method name, usually passed as __FUNCTION__
* @param array $arguments Arguments passed to the hook as an array
* The first parameter is the action.
* If the action is 'return', the second parameter is the result
* The remaining parameter are the methods parameter, passed by reference if action is not 'return'.
*
* @return mixed Returns result if action is 'return'
* @access protected
*/
protected function call_inject($name, $arguments)
{
$result = NULL;
if (!is_array($arguments))
{
$action = $arguments;
$arguments = array();
}
else
{
$action = array_shift($arguments);
}
// Return action... handle like override
if ($action == 'return')
{
$result = array_shift($arguments);
foreach ($this->plugin_methods[$name][phpbb::METHOD_INJECT][$action] as $method => $object)
{
$args = array_merge(array($this, $result), $arguments);
$result = call_user_func_array(array($object, $method), $args);
}
return $result;
}
foreach ($this->plugin_methods[$name][phpbb::METHOD_INJECT][$action] as $method => $object)
{
call_user_func_array(array($object, $method), array_merge(array($this), $arguments));
}
}
/**
* Check function signature for passed methods in {@link register_method() register_method()}.
*
* @param object $object The plugin
* @param string $method The method name
* @param phpbb::METHOD_ADD|phpbb::METHOD_OVERRIDE|phpbb::METHOD_INJECT $mode The mode
* @param string $action The action
*
* @return mixed True if the signature is valid, else the correct function signature
* @access private
*/
private function valid_parameter($object, $method, $mode, $action)
{
// We cache the results... no worry. These checks are quite resource intensive, but will hopefully educate and guide developers
@ -459,24 +689,29 @@ abstract class phpbb_plugin_support
// Define the required function layout
$function_layout = 'public function ' . $method . '(' . $instance_of . ' $object';
// Result for PLUGIN_INJECT and action == 'return'
if ($mode == phpbb::PLUGIN_INJECT && $action == 'return')
// Result for METHOD_INJECT and action == 'return'
if ($mode == phpbb::METHOD_INJECT && $action == 'return')
{
$function_layout .= ', $result';
}
// Optional method parameter
$function_layout .= ', [...]) { [...] }';
// Now check the method
$reflection = new ReflectionMethod($object, $method);
$parameters = $reflection->getParameters();
// First parameter needs to be defined
$first_param = array_shift($parameters);
// Try to get class
// Signature is wrong if first parameter is empty
if (empty($first_param))
{
return $function_layout;
}
// Try to get class from first parameter
try
{
$first_param->getClass()->name;
@ -486,23 +721,53 @@ abstract class phpbb_plugin_support
return $function_layout;
}
// First parameter needs to be an instance of phpbb_$phpbb_plugin and parameter must be $object
if ($first_param->getClass()->name !== $instance_of || $first_param->getName() !== 'object')
{
return $function_layout;
}
if ($mode == phpbb::PLUGIN_INJECT && $action == 'return')
// If the action is 'return' we also check for an existing $result parameter
if ($mode == phpbb::METHOD_INJECT && $action == 'return')
{
$first_param = array_shift($parameters);
// If no result is passed, or the name not $result or the $result being optional, then the signature is wrong
if (empty($first_param) || $first_param->getName() !== 'result' || $first_param->isOptional())
{
return $function_layout;
}
}
// Everything ok
return true;
}
}
/**
* Interface for phpBB plugin info
*/
interface phpbb_plugin_info
{
/**
* Setup plugin information
*
* @param phpbb_plugins $object The {@link phpbb_plugins plugins object} passed
*/
public function setup_plugin(phpbb_plugins $object);
}
/**
* Interface for phpBB plugin setup
*/
interface phpbb_plugin_setup
{
/**
* Setup specific class within the plugin
*
* @param phpbb_plugin_support $object The injected object... supports {@link phpbb_plugin_support plugins}
*/
function setup_plugin(phpbb_plugin_support $object);
}
?>