def add_client(self, the_id, name, from_undo=False):
'''
Creates a client object that will be added to the list of clients from the repository
:param from_undo: False if the function eas not called from the undo option, True otherwise
:param the_id: the client id (int)
:param name: the client name (string)
'''
if self.find_by_id(the_id) is not None:
raise IdError("Id already exists !")
self._repository.add(Client(the_id, name))
if not from_undo:
function = FunctionCall(self.add_client, the_id, name, True)
reverse_function = FunctionCall(self.delete_client, the_id, True)
operation = Operation(function, reverse_function)
self._undo_service.record_operation(operation)
def update_client(self, the_id, name, from_undo=False):
'''
Creates a new client object and calls the update method from the repository for updating the client in the repo
:param from_undo: False if the function eas not called from the undo option, True otherwise
:param the_id: the client's id
:param name: the client's name
'''
if self.find_by_id(the_id) is None:
raise IdError("Id does not exists")
old_client = self.search_by_id(the_id)
old_client.name = name
if not from_undo:
function = FunctionCall(self.update_client, the_id, name, True)
reverse_function = FunctionCall(self.update_client, old_client.id,
old_client.name, True)
operation = Operation(function, reverse_function)
self._undo_service.record_operation(operation)
def delete_client(self, the_id, from_undo=False):
'''
Calls the delete method from the repository in order to delete the client, by the id
:param from_undo: False if the function eas not called from the undo option, True otherwise
:param the_id: the client's id
'''
if self.find_by_id(the_id) is None:
raise IdError("Id does not exists")
client = self.find_by_id(the_id)
self._repository.delete(client)
if not from_undo:
function = FunctionCall(self.delete_client, the_id, True)
reverse_function = FunctionCall(self.add_client, the_id,
client.name, True)
operation = Operation(function, reverse_function)
cascaded_operation = CascadedOperation()
cascaded_operation.add(operation)
self._undo_service.record_operation(cascaded_operation)
def add_movie(self, the_id, title, description, genre, from_undo=False):
'''
Creates a movie object that will be added to the list of movies from the repository
:param from_undo: False if the function eas not called from the undo option, True otherwise
:param the_id: the movie id
:param title: the movie title
:param description: the movie description
:param genre: the movie genre
'''
if self.find_by_id(the_id) is not None:
raise IdError("Id already exists !")
self._repository.add(Movie(the_id, title, description, genre))
if not from_undo:
function = FunctionCall(self.add_movie, the_id, title, description,
genre, True)
reverse_function = FunctionCall(self.delete_movie, the_id, True)
operation = Operation(function, reverse_function)
self._undo_service.record_operation(operation)
def delete_movie(self, the_id, from_undo=False):
'''
Calls the delete method from the repository in order to delete the movie, by the id
:param from_undo: False if the function eas not called from the undo option, True otherwise
:param the_id: the movie id
'''
if self.find_by_id(the_id) is None:
raise IdError("Id does not exists")
movie = self.search_by_id(the_id)
self._repository.delete(movie)
if not from_undo:
function = FunctionCall(self.delete_movie, the_id, True)
reverse_function = FunctionCall(self.add_movie, the_id,
movie.title, movie.description,
movie.genre, True)
operation = Operation(function, reverse_function)
cascaded_operation = CascadedOperation()
cascaded_operation.add(operation)
self._undo_service.record_operation(cascaded_operation)
def update_movie(self, the_id, title, description, genre, from_undo=False):
'''
Creates a new movie object and calls the update method from the repository for updating the movie in the repo
:param from_undo: False if the function eas not called from the undo option, True otherwise
:param the_id: the movie id
:param title: the movie title
:param description: the movie description
:param genre: the movie genre
'''
if self.find_by_id(the_id) is None:
raise IdError("Id does not exists")
movie = self.search_by_id(the_id)
movie.title = title
movie.genre = genre
movie.description = description
if not from_undo:
function = FunctionCall(self.update_movie, movie.id, movie.title,
movie.description, movie.genre, True)
reverse_function = FunctionCall(self.update_movie, movie.id,
movie.title, movie.description,
movie.genre, True)
operation = Operation(function, reverse_function)
self._undo_service.record_operation(operation)
def exists(service, the_id, msg):
if service.find_by_id(the_id) is None:
raise IdError("Invalid id for " + msg)