mirror of
https://github.com/Dvorinka/swingmusic-extended.git
synced 2026-06-03 20:13:02 +00:00
cwilvx
86fabcd5e3
+ merge main.py and manage.py + move start logic to swingmusic/__main__.py + add a run.py on the project root
112 lines
3.8 KiB
Python
112 lines
3.8 KiB
Python
from swingmusic.models.track import Track
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from typing import List, Dict, Tuple
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from collections import Counter
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def violates_gap_rule(
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balanced_mix: Dict[int, Track], position: int, track: Track, gap: int = 3
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) -> bool:
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"""
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Check if placing the track at the given position violates the gap rule.
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The gap rule is violated if the track has an artist in common with any
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track within the gap range (default = 3).
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"""
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track_artists = set(artist["artisthash"] for artist in track.artists)
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for i in range(max(0, position - gap), position):
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if i in balanced_mix:
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existing_artists = set(
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artist["artisthash"] for artist in balanced_mix[i].artists
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)
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if track_artists.intersection(existing_artists):
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return True
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return False
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def find_next_position(
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balanced_mix: Dict[int, Track], start: int, track: Track, total_tracks: int
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) -> int:
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"""
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Find the next available position for the track, starting from 'start' and wrapping around.
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"""
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for i in range(start, total_tracks):
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if i not in balanced_mix and not violates_gap_rule(balanced_mix, i, track):
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return i
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for i in range(start):
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if i not in balanced_mix and not violates_gap_rule(balanced_mix, i, track):
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return i
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return start # If no better position is found, return the original position
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def is_tracklist_balanced(tracks: List[Track], gap: int = 3) -> Tuple[bool, bool]:
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"""
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Checks if a tracklist is balanced or can be balanced.
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Args:
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- tracks: List of Track objects
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- gap: Minimum number of tracks between songs by the same artist (default 3)
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Returns:
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- A tuple (can_be_balanced, is_currently_balanced)
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"""
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total_tracks = len(tracks)
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# Count tracks per artist (considering only the first artist)
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artist_counts = Counter(track.artists[0]["artisthash"] for track in tracks)
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# Calculate the maximum number of tracks an artist can have in a balanced list
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max_tracks_per_artist = (total_tracks + gap) // (gap + 1)
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# Check if it's mathematically possible to balance the tracklist
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can_be_balanced = all(
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count <= max_tracks_per_artist for count in artist_counts.values()
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)
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if not can_be_balanced:
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return False, False
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# Check if the current arrangement is balanced
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is_currently_balanced = True
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artist_last_positions = {}
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for i, track in enumerate(tracks):
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artist = track.artists[0]["artisthash"]
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if artist in artist_last_positions:
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if i - artist_last_positions[artist] <= gap:
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is_currently_balanced = False
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break
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artist_last_positions[artist] = i
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return can_be_balanced, is_currently_balanced
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def balance_mix(tracks: List[Track]) -> List[Track]:
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"""
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Balances the mix by ensuring that the tracks in a mix are distributed evenly.
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Preserves the overall rating order of tracks while minimizing disruption.
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Tracks that need to be moved are moved down the tracklist until they no longer
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violate the gap rule.
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"""
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can_be_balanced, is_balanced = is_tracklist_balanced(tracks)
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if is_balanced:
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# Already balanced, no need to modify
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return tracks
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# Proceed with best-effort balancing
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balanced_mix: Dict[int, Track] = {}
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total_tracks = len(tracks)
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for i, track in enumerate(tracks):
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if i in balanced_mix or not violates_gap_rule(balanced_mix, i, track):
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balanced_mix[i] = track
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else:
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new_position = find_next_position(balanced_mix, i, track, total_tracks)
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balanced_mix[new_position] = track
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# Convert the dictionary back to a list, preserving the new order
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return [balanced_mix[i] for i in sorted(balanced_mix.keys())]
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