def __init__(self, name='Undefined', tree=None):
    """Create a new ResponseRecipe instance with a default response.

    """
    self._name = name
    self._status = HTTPDStatus()
    self._data = dict()
    if tree is not None and isinstance(tree, HTMLTree):
        self._htree = tree
    else:
        self._htree = HTMLTree(self._name.replace(' ', '_'))
    shead = self._htree.head.serialize()
    if 'notify_event' not in shead:
        js = HTMLNode(self._htree.head.identifier, None, 'script', value=JS_NOTIFY_EVENT)
        self._htree.head.append_child(js)
    if 'request.js' not in shead:
        self._htree.head.script(src=os.path.join('whakerpy', 'request.js'), script_type='application/javascript')
    self.create()

@staticmethod
def page() -> str:
    """Return the HTML page name. To be overridden."""
    return 'undefined.html'

def get_data(self) -> str | bytes:
    """Gets the current data to send to the client following this request.

        :return: (str) The data in the string format or json depending on the type.

        """
    if isinstance(self._data, dict):
        return json.dumps(self._data)
    elif isinstance(self._data, bytes) or isinstance(self._data, bytearray) or isinstance(self._data, str):
        return self._data
    else:
        raise ValueError(f'Unexpected data type to response to the client : {type(self._data)}')

def reset_data(self) -> None:
    """Clear json data of the response.
        This function has to be called after each response send to the client to avoid overflow problems.

        """
    self._data = dict()

@property
def name(self) -> str:
    return self._name

@property
def status(self) -> HTTPDStatus:
    return self._status

def comment(self, content: str) -> HTMLComment:
    """Add a comment to the body->main.

        :param content: (str) The comment content
        :return: (HTMLComment) the created node

        """
    return self._htree.comment(content)

def element(self, tag: str='div', ident=None, class_name=None) -> HTMLNode:
    """Add an element node to the body->main.

        :param tag: (str) HTML element name
        :param ident: (str) Identifier of the element
        :param class_name: (str) Value of the class attribute
        :return: (HTMLNode) The created node

        """
    return self._htree.element(tag, ident, class_name)

def create(self) -> None:
    """Create the fixed page content in HTML. Intended to be overridden.

        This method is intended to be used to create the parts of the tree
        that won't be invalidated when baking.

        """
    pass

def bake(self, events: dict, headers: dict=None) -> str:
    """Return the HTML response after processing the events.

        Processing the events may change the response status. This method is
        invoked by the HTTPD server to construct the response. Given events
        are the information the handler received (commonly with POST).

        :param events: (dict) The requested events to be processed
        :param headers: (dict) The headers of the http request received

        """
    dirty = self._process_events(events, headers=headers)
    if dirty is True:
        self._invalidate()
        self._bake()
    return self._htree.serialize()

def _process_events(self, events: dict, **kwargs) -> bool:
    """Process the given events.

        The given event name must match a function of the event's manager.
        Processing an event may change the content of the tree. In that case,
        the `dirty` method must be turned into True: it will invalidate the
        deprecated content (_invalidate) and re-generate a new one (_bake).

        :param events (dict): key=event_name, value=event_value
        :return: None

        """
    self._status.code = 200
    return False

def _invalidate(self):
    """Remove children nodes of the tree. Intended to be overridden.

        Remove the dynamic content of the tree, which will be re-introduced
        when baking.

        If the tree has no dynamic content, this method is un-used.

        """
    pass

def _bake(self) -> None:
    """Fill in the HTML page generator. Intended to be overridden.

        If the tree has no dynamic content, this method is un-used.

        This method is baking the "dynamic" content of the page, i.e. it
        should not change the content created by the method create().

        """
    pass