95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
from database.database import Database
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from typing import Optional, List
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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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with Database() as db:
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category = 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 category["category_id"] if category else None
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def followed_categories_recommendations(user_id : int) -> Optional[List[dict]]:
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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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with Database() as db:
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streams = db.fetchall("""
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SELECT stream_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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WHERE categories.category_id IN (SELECT category_id FROM followed_categories WHERE user_id = ?)
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ORDER BY num_viewers DESC
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LIMIT 25;
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""", (user_id,))
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return streams
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def recommendations_based_on_category(category_id: int) -> Optional[List[dict]]:
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"""
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Queries stream database to get top 25 most viewed streams based on given category
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"""
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with Database() as db:
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streams = db.fetchall("""
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SELECT streams.stream_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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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 streams
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def default_recommendations() -> Optional[List[dict]]:
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"""
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Return a list of 25 recommended live streams by number of viewers
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"""
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with Database() as db:
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data = db.fetchall("""
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SELECT streams.stream_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() -> Optional[List[dict]]:
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"""
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Returns a list of the top 5 most popular live categories
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"""
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with Database() as db:
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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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def user_category_recommendations(user_id: int) -> Optional[List[dict]]:
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"""
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Queries user_preferences database to find users top 5 favourite streaming category and returns the category
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"""
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with Database() as db:
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categories = db.fetchall("""
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SELECT categories.category_id, categories.category_name
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FROM categories
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JOIN user_preferences ON categories.category_id = user_preferences.category_id
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WHERE user_id = ?
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ORDER BY favourability DESC
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LIMIT 5
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""", (user_id,))
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return categories |