87 lines
3.3 KiB
Python
87 lines
3.3 KiB
Python
from database.database import Database
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from typing import Optional, List, Tuple
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def user_recommendation_category(user_id: int) -> Optional[int]:
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"""
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Queries user_preferences database to find users favourite streaming category and returns the category
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"""
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db = Database()
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data = db.fetchone("""
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SELECT category_id
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FROM user_preferences
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WHERE user_id = ?
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ORDER BY favourability DESC
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LIMIT 1
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""", (user_id,))
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return data
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#TODO Needs to be reworked to get categories instead of streams of categories (below can be done in another function - get_streams_by_category)
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def followed_categories_recommendations(user_id : int):
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"""
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Returns top 25 streams given a users category following
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"""
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db = Database()
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# TODO: Change this to do what the function says
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categories = db.fetchall("""
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SELECT s.stream_id, s.title, u.username, s.num_viewers, c.category_name
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FROM streams AS s
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JOIN users AS u ON u.user_id = s.user_id
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JOIN categories AS c ON s.category_id = c.category_id
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JOIN followed_categories AS f ON s.category_id = f.category_id
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WHERE f.user_id = ?
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ORDER BY s.num_viewers DESC
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LIMIT 25;
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""", (user_id,))
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return categories
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#TODO Needs to be reworked to get categories instead of streams of categories
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def recommendations_based_on_category(category_id: int) -> Optional[List[Tuple[int, str, int]]]:
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"""
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Queries stream database to get top 25 most viewed streams based on given category and returns
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(user_id, title, username, num_viewers, category_name)
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"""
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db = Database()
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data = db.fetchall("""
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SELECT streams.category_id, streams.user_id, streams.title, users.username, streams.num_viewers, categories.category_name
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FROM streams
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JOIN users ON users.user_id = streams.user_id
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JOIN categories ON streams.category_id = categories.category_id
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WHERE categories.category_id = ?
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ORDER BY num_viewers DESC
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LIMIT 25
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""", (category_id,))
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return data
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def default_recommendations():
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"""
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Return a list of 25 recommended live streams by number of viewers
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(user_id, title, username, num_viewers, category_name)
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"""
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db = Database()
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data = db.fetchall("""
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SELECT stream_id, users.user_id, title, username, num_viewers, category_name
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FROM streams
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JOIN users ON users.user_id = streams.user_id
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JOIN categories ON streams.category_id = categories.category_id
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ORDER BY num_viewers DESC
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LIMIT 25;
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""")
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return data
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def category_recommendations():
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"""
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Returns a list of the top 5 most popular categories
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"""
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db = Database()
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categories = db.fetchall("""
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SELECT categories.category_id, categories.category_name
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FROM streams
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JOIN categories ON streams.category_id = categories.category_id
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WHERE streams.isLive = 1
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GROUP BY categories.category_name
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ORDER BY SUM(streams.num_viewers) DESC
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LIMIT 5;
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""")
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return categories
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