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console.py
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console.py
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#!/usr/bin/python3
""" Contains the entry point of the command interpreter. """
import cmd
import shlex
from models import storage
from models.base_model import BaseModel
from models.user import User
from models.amenity import Amenity
from models.city import City
from models.place import Place
from models.review import Review
from models.state import State
import models
class HBNBCommand(cmd.Cmd):
""" HBNBcommand class interpreter """
prompt = '(hbnb) '
def do_EOF(self, line):
""" Function of (End Of File) """
return True
def do_quit(self, line):
"""Quit command to exit the program"""
return True
def do_create(self, args):
"""
Creates a new instance of BaseModel, saves it
(to the JSON file) and prints the id
Example (replace - with spaces):
create-name_of_class
"""
try:
args = shlex.split(args)
if args == []:
print("** class name missing **")
return
else:
expresion = args[0]
new_ins = eval(expresion)()
new_ins.save()
print(new_ins.id)
return
except:
print("** class doesn't exist **")
return
def do_show(self, args):
"""
Prints the string representation of an instance
based on the class name and id
Example (replace - with spaces):
show-name_of_class-id_object
"""
args = shlex.split(args)
key = ""
obj_dict = storage.all()
if args == []:
print("** class name missing **")
return
try:
eval(args[0])
except NameError:
print("** class doesn't exist **")
return
if len(args) == 1:
print("** instance id missing **")
return
key = str(args[0]) + "." + str(args[1])
try:
print(obj_dict[key])
return
except KeyError:
print("** no instance found **")
return
def do_destroy(self, args):
"""
Deletes an instance based on the class name and id
(save the change into the JSON file)
Example (replace - with spaces):
destroy-name_of_class-id_object
"""
args = shlex.split(args)
key = ""
obj_dict = storage.all()
if args == []:
print("** class name missing **")
return
try:
eval(args[0])
except NameError:
print("** class doesn't exist **")
return
if len(args) == 1:
print("** instance id missing **")
return
key = str(args[0]) + "." + str(args[1])
try:
del(obj_dict[key])
except KeyError:
print("** no instance found **")
return
storage.save()
def do_all(self, args):
"""
Prints all string representation of all
instances based or not on the class name
If you need all the instances created only
with the sentence 'all'.
If you need the instances created from a specific class,
then type 'all name_of_class'
"""
obj_lst = []
args = shlex.split(args)
if len(args) == 0:
models.storage.reload()
for key, val in models.storage.all().items():
obj_lst.append(val.__str__())
print(obj_lst)
return
try:
eval(args[0])
except NameError:
print("** class doesn't exist **")
return
models.storage.reload()
for key, val in models.storage.all().items():
if val.__class__.__name__ == args[0]:
obj_lst.append(val.__str__())
print(obj_lst)
def do_update(self, args):
"""
Updates an instance based on the class name and id by adding
or updating attribute (save the change into the JSON file)
Example (replace - with spaces):
update-name_of_class-id_object-attribute-value_attribute
"""
if len(args) == 0:
print("** class name missing **")
return
args = shlex.split(args)
try:
eval(args[0])
except NameError:
print("** class doesn't exist **")
return
if len(args) == 1:
print("** instance id missing **")
return
key = str(args[0]) + "." + str(args[1])
obj_dict = storage.all()
try:
obj_dict[key]
except KeyError:
print("** no instance found **")
return
if len(args) == 2:
print("** attribute name missing **")
return
elif len(args) == 3:
print("** value missing **")
return
setattr(obj_dict[key], args[2], args[3])
storage.save()
def emptyline(self):
"""Print a new empty line"""
return
def do_count(self, args):
'''Counts the number of instances.'''
count = 0
args = args.split()
obj_dict = storage.all()
try:
eval(args[0])
except NameError:
print("** class doesn't exist **")
return
for key in obj_dict.values():
if args[0] == key.__class__.__name__:
count += 1
print(count)
def default(self, args):
''' Default execute the functions. '''
functions = {"all": self.do_all, "update": self.do_update,
"show": self.do_show, "count": self.do_count,
"destroy": self.do_destroy, "update": self.do_update}
args = (args.replace("(", ".").replace(")", ".")
.replace('"', "").replace(",", "").split("."))
try:
cmd_arg = args[0] + " " + args[2]
func = functions[args[1]]
func(cmd_arg)
except:
print("*** Unknown syntax:", args[0])
if __name__ == '__main__':
HBNBCommand().cmdloop()