swingmusic/app/utils.py
geoffrey45 bcc4873766 handle XDG_CONFIG_HOME specification ...
+ fix bug that caused duplicate artist color entries to db
+ check if app is windows (prep for windows build)
+ remove caribou migrations lib
+ rename all api blueprints to "api"
+ unregister child directories when customizing root dirs
+ misc
2023-01-22 23:57:12 +03:00

253 lines
6.5 KiB
Python

"""
This module contains mini functions for the server.
"""
from pathlib import Path
from datetime import datetime
import os
import platform
import socket as Socket
import hashlib
import threading
import requests
from unidecode import unidecode
from app import models
from app.settings import SUPPORTED_FILES
CWD = Path(__file__).parent.resolve()
def background(func):
"""
a threading decorator
use @background above the function you want to run in the background
"""
def background_func(*a, **kw):
threading.Thread(target=func, args=a, kwargs=kw).start()
return background_func
def run_fast_scandir(__dir: str, full=False) -> tuple[list[str], list[str]]:
"""
Scans a directory for files with a specific extension. Returns a list of files and folders in the directory.
"""
subfolders = []
files = []
try:
for _files in os.scandir(__dir):
if _files.is_dir() and not _files.name.startswith("."):
subfolders.append(_files.path)
if _files.is_file():
ext = os.path.splitext(_files.name)[1].lower()
if ext in SUPPORTED_FILES:
files.append(_files.path)
if full or len(files) == 0:
for _dir in list(subfolders):
sub_dirs, _files = run_fast_scandir(_dir, full=True)
subfolders.extend(sub_dirs)
files.extend(_files)
except PermissionError:
return [], []
return subfolders, files
def remove_duplicates(tracks: list[models.Track]) -> list[models.Track]:
"""
Removes duplicate tracks from a list of tracks.
"""
hashes = []
for track in tracks:
if track.trackhash not in hashes:
hashes.append(track.trackhash)
tracks = sorted(tracks, key=lambda x: x.trackhash)
tracks = UseBisection(tracks, "trackhash", hashes)()
return [t for t in tracks if t is not None]
def create_hash(*args: str, decode=False, limit=7) -> str:
"""
Creates a simple hash for an album
"""
string = "".join(args)
if decode:
string = unidecode(string)
string = string.lower().strip().replace(" ", "")
string = "".join(t for t in string if t.isalnum())
string = string.encode("utf-8")
string = hashlib.sha256(string).hexdigest()
return string[-limit:]
def create_folder_hash(*args: str, limit=7) -> str:
"""
Creates a simple hash for an album
"""
strings = [s.lower().strip().replace(" ", "") for s in args]
strings = ["".join([t for t in s if t.isalnum()]) for s in strings]
strings = [s.encode("utf-8") for s in strings]
strings = [hashlib.sha256(s).hexdigest()[-limit:] for s in strings]
return "".join(strings)
def create_new_date():
"""
It creates a new date and time string in the format of "YYYY-MM-DD HH:MM:SS"
:return: A string of the current date and time.
"""
now = datetime.now()
return now.strftime("%Y-%m-%d %H:%M:%S")
class UseBisection:
"""
Uses bisection to find a list of items in another list.
returns a list of found items with `None` items being not found
items.
"""
def __init__(self, source: list, search_from: str, queries: list[str]) -> None:
self.source_list = source
self.queries_list = queries
self.attr = search_from
def find(self, query: str):
left = 0
right = len(self.source_list) - 1
while left <= right:
mid = (left + right) // 2
if self.source_list[mid].__getattribute__(self.attr) == query:
return self.source_list[mid]
elif self.source_list[mid].__getattribute__(self.attr) > query:
right = mid - 1
else:
left = mid + 1
return None
def __call__(self) -> list:
if len(self.source_list) == 0:
return [None]
return [self.find(query) for query in self.queries_list]
class Ping:
"""
Checks if there is a connection to the internet by pinging google.com
"""
@staticmethod
def __call__() -> bool:
try:
requests.get("https://google.com", timeout=10)
return True
except (requests.exceptions.ConnectionError, requests.Timeout):
return False
def get_artists_from_tracks(tracks: list[models.Track]) -> set[str]:
"""
Extracts all artists from a list of tracks. Returns a list of Artists.
"""
artists = set()
master_artist_list = [[x.name for x in t.artist] for t in tracks] # type: ignore
artists = artists.union(*master_artist_list)
return artists
def get_albumartists(albums: list[models.Album]) -> set[str]:
artists = set()
# master_artist_list = [a.albumartists for a in albums]
for album in albums:
albumartists = [a.name for a in album.albumartists] # type: ignore
artists.update(albumartists)
# return [models.Artist(a) for a in artists]
return artists
def get_all_artists(
tracks: list[models.Track], albums: list[models.Album]
) -> list[models.Artist]:
artists_from_tracks = get_artists_from_tracks(tracks)
artist_from_albums = get_albumartists(albums)
artists = list(artists_from_tracks.union(artist_from_albums))
artists = sorted(artists)
lower_artists = set(a.lower().strip() for a in artists)
indices = [[ar.lower().strip() for ar in artists].index(a) for a in lower_artists]
artists = [artists[i] for i in indices]
return [models.Artist(a) for a in artists]
def bisection_search_string(strings: list[str], target: str) -> str | None:
"""
Finds a string in a list of strings using bisection search.
"""
if not strings:
return None
strings = sorted(strings)
left = 0
right = len(strings) - 1
while left <= right:
middle = (left + right) // 2
if strings[middle] == target:
return strings[middle]
if strings[middle] < target:
left = middle + 1
else:
right = middle - 1
return None
def get_home_res_path(filename: str):
"""
Returns a path to resources in the home directory of this project. Used to resolve resources in builds.
"""
return (CWD / ".." / filename).resolve()
def get_ip():
"""
Returns the IP address of this device.
"""
soc = Socket.socket(Socket.AF_INET, Socket.SOCK_DGRAM)
soc.connect(("8.8.8.8", 80))
ip_address = str(soc.getsockname()[0])
soc.close()
return ip_address
def is_windows():
"""
Returns True if the OS is Windows.
"""
return platform.system() == "Windows"