def library_len():
"""
Counts the number of games in library and stores it to variable
"""
global LEN_OF_LIBRARY
cursor.execute(SQL_SELECT_LIBRARY)
LEN_OF_LIBRARY = cursor.fetchall()[0][0]
def chosen_characteristic(text, characteristic, page=None, items=None):
"""
Counts the number of games in chosen characteristic query or
gets games for fulfilling chosen characteristic page of the app
:param text: Value for parameter characteristic
:param characteristic: Parameter of the game, e.g. genre, publisher, etc.
:param page: Page in the app
:param items: Amount of items per page
:return: int or list of Game objects
"""
if page is None:
limit = NUMBER_OF_GAMES
offset = 0
else:
limit = items
offset = (page - 1) * items
text = text.replace("_", " ")
if characteristic == "platform":
cursor.execute(SQL_SELECT_GAMES_BY_PLATFORM, (text, limit, offset))
elif characteristic == "genre":
cursor.execute(SQL_SELECT_GAMES_BY_GENRE, (text, limit, offset))
elif characteristic == "theme":
cursor.execute(SQL_SELECT_GAMES_BY_THEME, (text, limit, offset))
elif characteristic == "developer":
cursor.execute(SQL_SELECT_GAMES_BY_COMPANY,
("developer", text, limit, offset))
else:
cursor.execute(SQL_SELECT_GAMES_BY_COMPANY,
("publisher", text, limit, offset))
data = cursor.fetchall()
if page is None:
return len(data)
return [Game(game[0]) for game in data]
def add_to_library(self, rating=None):
"""
Adds game to the library
:param rating: User rating for the game
"""
cursor.execute(SQL_INSERT_TO_LIBRARY, (self.id, int(rating)))
cnx.commit()
def get_rating(self):
"""
For game in the library, get user rating
:return: int
"""
cursor.execute(SQL_CHECK_RATING, (self.id, ))
return cursor.fetchall()[0][0]
def library_page(page, items):
"""
Gets games for filling library page of the app
:param page: Page in the app
:param items: Amount of items per page
:return: list of Game objects
"""
cursor.execute(SQL_SELECT_GAMES_FROM_LIBRARY, (items, (page - 1) * items))
return [Game(game[0]) for game in cursor.fetchall()]
def library_state(self):
"""
Checks if game is in the library or not
:return: bool
"""
cursor.execute(SQL_CHECK_LIBRARY_STATE, (self.id, ))
returned_data = cursor.fetchall()
if len(returned_data) == 1:
return True
return False
def game_by_name(string):
"""
Searches game by the name
:param string: Search query
:return: Game or None
"""
cursor.execute(SQL_SELECT_GAME_BY_NAME, (string, ))
try:
data = cursor.fetchall()[0]
return Game(data[0])
except IndexError:
return None
def __init__(self, game_id):
self.id = game_id
cursor.execute(SQL_SELECT_GAME, (self.id, ))
fetched_data = cursor.fetchall()[0]
self.name = fetched_data[1]
self.desc = fetched_data[2]
if self.desc is None:
self.desc = "N/A"
self.image = fetched_data[3]
self.release_date = fetched_data[4]
if self.release_date is None:
self.release_date = "N/A"
cursor.execute(SQL_SELECT_PLATFORMS, (self.id, ))
self.platforms = [platform[1] for platform in cursor.fetchall()]
cursor.execute(SQL_SELECT_GENRES, (self.id, ))
self.genres = [genre[1] for genre in cursor.fetchall()]
cursor.execute(SQL_SELECT_THEMES, (self.id, ))
self.themes = [theme[1] for theme in cursor.fetchall()]
cursor.execute(SQL_SELECT_COMPANY, (self.id, "developer"))
self.developers = [company[1] for company in cursor.fetchall()]
cursor.execute(SQL_SELECT_COMPANY, (self.id, "publisher"))
self.publishers = [company[1] for company in cursor.fetchall()]
def analyze_library():
"""
Analyzes library and returns recommendations
:return: list of Game objects
"""
def fill_dicts(items, dict_of, rating):
""" On-place function used for filling rating dicts """
for item in items:
if item in dict_of.keys():
dict_of[item] += rating
else:
dict_of[item] = rating
global LEN_OF_RECOMMENDATIONS
cursor.execute(SQL_SELECT_GAMES_FROM_LIBRARY, (NUMBER_OF_GAMES, 0))
game_ids = [item[0] for item in cursor.fetchall()]
if len(game_ids) == 0:
LEN_OF_RECOMMENDATIONS = 0
return []
games = [Game(game) for game in game_ids]
rating_dicts = [{}, {}]
for game in games:
game.rating = game.get_rating()
fill_dicts(game.genres, rating_dicts[0], game.rating)
fill_dicts(game.platforms, rating_dicts[1], game.rating)
max_values = []
for i in range(2):
try:
max_values.append(
max(rating_dicts[i].items(), key=operator.itemgetter(1))[0])
except ValueError:
max_values.append(None)
returned_platform_ids = []
returned_genre_ids = []
if max_values[1] is not None:
cursor.execute(SQL_SELECT_GAMES_BY_PLATFORM,
(max_values[1], NUMBER_OF_GAMES, 0))
returned_platform_ids = [item[0] for item in cursor.fetchall()]
returned_platform_ids = list(
set(returned_platform_ids) - set(game_ids))
if max_values[0] is not None:
cursor.execute(SQL_SELECT_GAMES_BY_GENRE,
(max_values[0], NUMBER_OF_GAMES, 0))
returned_genre_ids = [item[0] for item in cursor.fetchall()]
returned_genre_ids = list(set(returned_genre_ids) - set(game_ids))
if len(returned_platform_ids) > 0:
if len(returned_genre_ids) > 0:
returned_ids = list(
set(returned_platform_ids).intersection(returned_genre_ids))
else:
returned_ids = returned_platform_ids
elif len(returned_genre_ids) > 0:
returned_ids = returned_genre_ids
else:
LEN_OF_RECOMMENDATIONS = 0
return []
if len(returned_ids) > 14:
returned_ids = random.choices(returned_ids, k=14)
LEN_OF_RECOMMENDATIONS = len(returned_ids)
return [Game(game) for game in returned_ids]
def remove_from_library(self):
""" Removes game from the library """
cursor.execute(SQL_DELETE_FROM_LIBRARY, (self.id, ))
cnx.commit()
""" Gets amount of games in library """
SQL_SELECT_LIBRARY = "SELECT COUNT(id) FROM library"
""" SQL query for getting games for library page of the app """
SQL_SELECT_GAMES_FROM_LIBRARY = "SELECT gameId FROM library LIMIT %s OFFSET %s"
""" SQL queries for getting games by chosen characteristic """
SQL_SELECT_GAMES_BY_PLATFORM = "SELECT id FROM games WHERE id IN (SELECT gameId FROM games_and_platforms " \
"WHERE platformId = (SELECT id FROM platforms WHERE name=%s)) LIMIT %s OFFSET %s"
SQL_SELECT_GAMES_BY_GENRE = "SELECT id FROM games WHERE id IN (SELECT gameId FROM games_and_genres " \
"WHERE genreId = (SELECT id FROM genres WHERE name=%s)) LIMIT %s OFFSET %s"
SQL_SELECT_GAMES_BY_THEME = "SELECT id FROM games WHERE id IN (SELECT gameId FROM games_and_themes " \
"WHERE themeId = (SELECT id FROM themes WHERE name=%s)) LIMIT %s OFFSET %s"
SQL_SELECT_GAMES_BY_COMPANY = "SELECT id FROM games WHERE id IN (SELECT gameId FROM games_and_companies " \
"WHERE relation=%s AND companyId = (SELECT id FROM companies WHERE name=%s)) " \
"LIMIT %s OFFSET %s"
""" Gets max game id (used when getting random game """
cursor.execute("SELECT MAX(id) FROM games")
MAX_ID = cursor.fetchall()[0][0]
""" Gets amount of games in DB """
cursor.execute("SELECT COUNT(id) FROM games")
NUMBER_OF_GAMES = cursor.fetchall()[0][0]
""" Stores amount of games in library; changes only when it's needed """
LEN_OF_LIBRARY = 0
""" Stores amount of recommended games; changes only when it's needed """
LEN_OF_RECOMMENDATIONS = 0
class Game:
"""
Main entity class. Used for storing info about concrete game and
operating with this info
"""
