From a0e1662e1de0229b6b2359dd800945d3edfe026b Mon Sep 17 00:00:00 2001
From: Simone Tesini <simozilla006@gmail.com>
Date: Fri, 1 Aug 2025 19:13:09 +0200
Subject: [PATCH] pull

---
 backend/src/app.py  |  2 +-
 backend/src/room.py | 33 +++++++++++++++++++++++++++++++--
 ruff.toml           |  1 +
 3 files changed, 33 insertions(+), 3 deletions(-)
 create mode 100644 ruff.toml

diff --git a/backend/src/app.py b/backend/src/app.py
index 2484d2c..39ff440 100644
--- a/backend/src/app.py
+++ b/backend/src/app.py
@@ -1,6 +1,6 @@
 from flask import Flask, Response, jsonify, request
 from flask_cors import CORS
-from room import Room
+from src.room import Room
 
 app = Flask(__name__)
 CORS(app)
diff --git a/backend/src/room.py b/backend/src/room.py
index bdf4026..a9ddd7c 100644
--- a/backend/src/room.py
+++ b/backend/src/room.py
@@ -2,7 +2,16 @@ from dataclasses import dataclass
 
 from song import Song
 
-type UserScoredSong = tuple[Song, int]
+USER_SCORE_WEIGHT = 0.7
+GENRE_WEIGHT = 0.1
+RANDOM_WEIGHT = 0.1
+RECENT_PENALTY = 0.5
+RECENT_COUNT = 10
+
+
+@dataclass
+class UserScoredSong(Song):
+    user_score: int
 
 
 @dataclass
@@ -14,5 +23,25 @@ class Room:
     tags: set[str]
     creative: bool
 
-    playlist: set[UserScoredSong]
+    songs: dict[str, UserScoredSong]
     history: list[Song]
+
+    def rank_song(
+        self,
+        song: UserScoredSong,
+    ) -> float:
+        rank = 0.0
+        song_items = self.songs.items()
+
+        lowest_score = min(song_items, key=lambda item: item[1].user_score)[1].user_score
+        highest_score = min(song_items, key=lambda item: item[1].user_score)[1].user_score
+
+        rank += translate(song.user_score, lowest_score, highest_score, 0.0, USER_SCORE_WEIGHT)
+
+        last10items = self.history[-10:]
+
+        return rank
+
+
+def translate(value: float, in_min: float, in_max: float, out_min: float, out_max: float):
+    return (value - in_min) / (in_max - in_min) * (out_max - out_min) + out_min
diff --git a/ruff.toml b/ruff.toml
new file mode 100644
index 0000000..d461c74
--- /dev/null
+++ b/ruff.toml
@@ -0,0 +1 @@
+line-length = 200