# Path: utils/database.py
# class Database:
#     """
#     This class handles :
#     - Provides a link and a cursor to the database as class attributes
#     Usage :
#     - Database.on()
#     - Database.CURSOR.execute(query, params)
#     - ... etc
#     - Database.off()
#     Available class attributes :
#     - LINK
#     - CURSOR
#     - FILE (path to the database file)
#     """
#     DATABASE_PRODUCTION = 'database.db'
#     """ Normal database filename """
#     DATABASE_TEST = 'database_test.db'
#     """ Test database filename : this database is temporary """
#     TEST_MODE = False
#     """ Does it need to use the test database ? """
# 
#     @classmethod
#     def on(cls):
#         """
#         Connect to the database
#         :rtype: bool
#         """
#         # Don't reconnect if already connected
#         if cls.is_ready():
#             return False
# 
#         # Filename
#         cls.FILE = cls.DATABASE_PRODUCTION
# 
#         if cls.TEST_MODE:
#             cls.FILE = cls.DATABASE_TEST
# 
#         # Connect
#         cls.LINK = sqlite3.connect(cls.FILE)
#         cls.LINK.row_factory = sqlite3.Row
#         cls.CURSOR = cls.LINK.cursor()
# 
#         return True
# 
#     @classmethod
#     def off(cls):
#         """
#         Ends connection with the database.
#         :rtype: bool
#         """
#         if cls.LINK:
#             cls.LINK.close()
#         cls.LINK = None
#         cls.CURSOR = None
#         return True
# 
#     @classmethod
#     def is_ready(cls):
#         """
#         Is the connection open ?
#         :rtype: bool
#         """
#         return hasattr(cls, 'LINK') and cls.LINK != None


from utils import Database
            }
        else:
            return False

    def add_item(self, barcode, quantity=1):
        """
        Adds an item to the grocery list
        :param barcode: barcode
        :param quantity: quantity
        :type barcode: str
        :type quantity: int
        :rtype: bool
        """
        query = "INSERT INTO Groceries VALUES (?, ?);"
        params = (barcode, quantity)
        Database.LINK.execute(query, params)
        Database.LINK.commit()
        return True

    def edit_item(self, barcode, quantity):
        """
        Edits an item from the grocery list
        :param barcode: barcode
        :param quantity: quantity
        :type barcode: str
        :type quantity: int
        :rtype: bool
        """
        query = "UPDATE Groceries SET quantity = ? WHERE barcode = ?;"
        params = (quantity, barcode)

# Path: utils/database.py
# class Database:
#     """
#     This class handles :
#     - Provides a link and a cursor to the database as class attributes
#     Usage :
#     - Database.on()
#     - Database.CURSOR.execute(query, params)
#     - ... etc
#     - Database.off()
#     Available class attributes :
#     - LINK
#     - CURSOR
#     - FILE (path to the database file)
#     """
#     DATABASE_PRODUCTION = 'database.db'
#     """ Normal database filename """
#     DATABASE_TEST = 'database_test.db'
#     """ Test database filename : this database is temporary """
#     TEST_MODE = False
#     """ Does it need to use the test database ? """
# 
#     @classmethod
#     def on(cls):
#         """
#         Connect to the database
#         :rtype: bool
#         """
#         # Don't reconnect if already connected
#         if cls.is_ready():
#             return False
# 
#         # Filename
#         cls.FILE = cls.DATABASE_PRODUCTION
# 
#         if cls.TEST_MODE:
#             cls.FILE = cls.DATABASE_TEST
# 
#         # Connect
#         cls.LINK = sqlite3.connect(cls.FILE)
#         cls.LINK.row_factory = sqlite3.Row
#         cls.CURSOR = cls.LINK.cursor()
# 
#         return True
# 
#     @classmethod
#     def off(cls):
#         """
#         Ends connection with the database.
#         :rtype: bool
#         """
#         if cls.LINK:
#             cls.LINK.close()
#         cls.LINK = None
#         cls.CURSOR = None
#         return True
# 
#     @classmethod
#     def is_ready(cls):
#         """
#         Is the connection open ?
#         :rtype: bool
#         """
#         return hasattr(cls, 'LINK') and cls.LINK != None


# Path: models/groceries.py
from utils import Database

            }
        else:
            return False

    def add_item(self, barcode, quantity=1):
        """
        Adds an item to the grocery list
        :param barcode: barcode
        :param quantity: quantity
        :type barcode: str
        :type quantity: int
        :rtype: bool
        """
        query = "INSERT INTO Groceries VALUES (?, ?);"
        params = (barcode, quantity)
        Database.LINK.execute(query, params)
        Database.LINK.commit()
        return True

    def edit_item(self, barcode, quantity):
        """
        Edits an item from the grocery list
        :param barcode: barcode
        :param quantity: quantity
        :type barcode: str
        :type quantity: int
        :rtype: bool
        """
        query = "UPDATE Groceries SET quantity = ? WHERE barcode = ?;"
        params = (quantity, barcode)

        Database.LINK.execute(query, params)