def create(self, args):
"""
Create the skewer that will hold the food.
:param args: a string containing the size to create
:return: None
"""
try:
# make sure the size is valid
if len(args) == 0 or int(args[0]) < 1:
raise SkewerException("Skewer size must be greater than 0")
size = int(args[0])
# force close a pre-existing skewer
if self.skewer != None:
self.skewer.close()
self.skewer = Skewer(size)
print("Skewer created.")
except SkewerException as e:
print(e)
self.skewer = None
except Exception as e:
sys.stderr.write(e)
self.usage()
return
def kebab_create_skewer(kebab, args):
"""
Create the skewer that will hold the food.
:param kebab (Kebab): this kebab
:param args: a string containing the size to create
:return: None
"""
try:
# make sure the capacity is valid
if len(args) == 0 or int(args[0]) < 1:
raise SkewerException("Skewer capacity must be greater than 0")
# convert it from string to int
capacity = int(args[0])
# force close a pre-existing skewer
if kebab.skewer is not None:
skewer_close(kebab.skewer)
# now make the skewer
kebab.skewer = skewer_create(capacity)
print("Skewer created.")
except SkewerException as e:
print(e)
kebab.skewer = None
except Exception as e:
sys.stderr.write(e)
kebab_usage()
return
def front(self):
"""
Gets the name of the front item on the skewer.
:exception SkewerException: no item was on the skewer
:return the name of the food item (string) on the front
"""
if not self.top or self.size() == 0:
raise SkewerException("Cannot get item from an empty skewer!")
return self.top.get_item().name
def skewer_front(skewer):
"""
Gets the name of the front item on the skewer.
:param skewer (Skewer): this skewer
:exception SkewerException: no item was on the skewer
:return the name of the food item (string) on the front
"""
if skewer.top is None:
raise SkewerException("Cannot get item from an empty skewer!")
return spot_name(skewer.top)
def skewer_create(capacity):
"""
Create a new empty skewer.
:param capacity (int): the maximum number of items it can hold
:exception SkewerException: a capacity less than 1 was specified.
"""
if capacity < 1:
raise SkewerException("Cannot create skewer!")
return Skewer(top=None, capacity=capacity, ui=SkewerUI(capacity))
def remove(self):
"""
Remove the front item from the skewer.
:exception: SkewerException: no item was on the skewer
:return None
"""
if not self.top or self.size() == 0:
raise SkewerException("Cannot get item from an empty skewer!")
self.ui.remove()
self.top = self.top.next
def skewer_remove(skewer):
"""
Remove the front item from the skewer.
:param skewer (Skewer): this skewer
:exception: SkewerException: no item was on the skewer
:return None
"""
if skewer.top is None:
raise SkewerException("Cannot get item from an empty skewer!")
skewer.ui.remove()
skewer.top = skewer.top.next
def add(self, name):
"""
Add a food item to the skewer
:param name: the string name of the food item
:exception SkewerException: item could not be added.
:return None
"""
if not self.top or self.top.size() < self.cap:
self.top = KebabSpot( Food(name), self.top )
self.ui.add(self.top)
else:
raise SkewerException("Cannot add item to a full skewer!")
def __init__(self, capacity):
"""
Construct a Skewer instance.
:param capacity: the maximum number of items it can hold
:exception SkewerException: a capacity less than 1 was specified.
"""
if capacity < 1:
raise SkewerException("Cannot create skewer!")
self.top = None
self.cap = capacity
self.ui = SkewerUI(self.cap)
def skewer_add(skewer, name):
"""
Add a food item to the skewer
:param skewer (Skewer): this skewer
:param name (str): the string name of the food item
:exception SkewerException: item could not be added.
:return None
"""
if skewer.top is None or spot_size(skewer.top) < skewer.capacity:
skewer.top = spot_create(food_create(name), skewer.top)
skewer.ui.add(skewer.top)
else:
raise SkewerException("Cannot add item to a full skewer!")
