First step, is to write a parent class to take care of the initialization, serialization and deserialization of future instances. Second step, to create a flow of serialization/deserialization:
Instance<->Dictionary<->JSON string,<->fileThird step, to create all classes used for AirBnB that inherit from the parent class Fourth step, to create the first abstracted storage engine of the project Final step, to create all unittests to validate all classes and storage engine
A command interpreter is the part of the operating system that takes commands via the command line from the user and executes them. The Shell is an example of one.
To start the command interpreter, first clone the repo to your local machine, and run the console:
./consoleOnce running, the prompt will appear(HBNB), and you can enter your command. With this command line interpreter, the user can create a new User, Place, State, or City, as well as retrieve an object from a file. The user may also update any of these attributes or destroy them.
With HBnB, the user can create Users, Places, States, Cities, and Reviews, as well as update each class with attributes such as name, first_name, last_name, email, and password. Below is a table with all functionality of the console:
| Command | Description |
|---|---|
| create | creates a new instance of a class |
| show | shows instance of a specified class or all class instances |
| destroy | deletes an instance based on class name and id |
| all | prints all string representations of all instances |
| update | updates an instance of a class ie email attribute of a User |
| Class | Attributes |
|---|---|
| User | email, password, first_name, last_name |
| State | name |
| City | state_id, name |
| Amenity | name |
| Place | city_id, user_id, name, description, number_rooms, number_bathrooms, max_guest, price_by_night, latitude, longitude, amenity_ids |
| Review | place_id, user_id, text |
{
$ ./console.py
(hbnb) help
Documented commands (type help <topic>):
========================================
EOF all create destroy help quit show update
(hbnb) create
** class name missing **
(hbnb) create BaseModel
138486be-3e76-43c8-b4f0-59f8c4888e87
(hbnb) show
** class name missing **
(hbnb) create User
e16d4b4d-9320-408c-90f4-0752be7fa65d
(hbnb) all
{'BaseModel.e12c8168-bad8-4ac1-b685-f8bcc1a57bed': <models.base_model.BaseModel object at 0x7f6d0780c780>, 'BaseModel.14dd894f-da3b-4e40-84a0-03b558ff80f1': <models.base_model.BaseModel object at 0x7f6d0847e470>, 'User.e1839253-151c-4bdb-80ad-7781cfec0cac': <models.user.User object at 0x7f6d084a8208>, 'User.7f69c2a7-fd1c-40bf-a948-b30d186e26be': <models.user.User object at 0x7f6d0847e438>, 'User.e16d4b4d-9320-408c-90f4-0752be7fa65d': <models.user.User object at 0x7f6d0847e358>, 'BaseModel.138486be-3e76-43c8-b4f0-59f8c4888e87': <models.base_model.BaseModel object at 0x7f6d089976a0>}
(hbnb)
}
{
$ echo "help" | ./console.py
(hbnb)
Documented commands (type help <topic>):
========================================
EOF all create destroy help quit show update
(hbnb)
$ echo show | ./console.py
(hbnb) ** class name missing **
(hbnb)
$ echo all | ./console.py
(hbnb) {'BaseModel.14dd894f-da3b-4e40-84a0-03b558ff80f1': <models.base_model.BaseModel object at 0x7f49b4f29e80>, 'User.7f69c2a7-fd1c-40bf-a948-b30d186e26be': <models.user.User object at 0x7f49b42ba7b8>, 'User.e1839253-151c-4bdb-80ad-7781cfec0cac': <models.user.User object at 0x7f49b42efc18>, 'BaseModel.138486be-3e76-43c8-b4f0-59f8c4888e87': <models.base_model.BaseModel object at 0x7f49b42efb38>, 'User.e16d4b4d-9320-408c-90f4-0752be7fa65d': <models.user.User object at 0x7f49b42efb00>, 'BaseModel.e12c8168-bad8-4ac1-b685-f8bcc1a57bed': <models.base_model.BaseModel object at 0x7f49b42efd30>}
(hbnb)
$
}