mirror of
https://github.com/bspeice/Melodia
synced 2024-12-24 07:38:14 -05:00
Delete stale files after move to models package
This commit is contained in:
Bradlee Speice
parent
6e767fb3fb
commit
33eed75bf0
@ -1,185 +0,0 @@
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from django.db import models
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"""
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This is the archive model for the archiving backend of Melodia.
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It's purpose is to control the high-level functionality of managing
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multiple archives of music. It is different from a playlist both conceptually
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and practically - an archive describes a group of files, while a playlist
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describes a group of songs.
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In this way, you back up archives of music - you don't back up the songs in a
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playlist. Additionally, you may want to re-organize your music to use a
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cleaner directory structure - a playlist doesn't care about this.
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"""
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class Archive (models.Model):
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import datetime
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"""
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The archive model itself, and all functions used to interact with it.
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The archive is built up from a grouping of songs, and the functions
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that are used to interact with many songs at a single time. The archive
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for example allows you to re-organize a specific set of music files into
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a cleaner directory structure.
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The archive is given a folder to use as its root directory - it finds all
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music files under there, and takes control of them from there.
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"""
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name = models.CharField(max_length = 64)
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#Note that we're not using FilePathField since this is actually a folder
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root_folder = models.CharField(max_length = 255)
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#We've removed the reference to "songs" - instead define it as a ForeignKey,
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#and do lookups via song_set
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#Backup settings
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backup_location = models.CharField(max_length = 255, default = "/dev/null")
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backup_frequency = models.IntegerField(default = 604800) #1 week in seconds
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last_backup = models.DateTimeField(default = datetime.datetime.now()) #Note that this by default will be the time the archive was instantiated
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def _scan_filesystem(self):
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"Scan the archive's root filesystem and add any new songs without adding metadata, delete songs that exist no more"
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#This method is implemented since the other scan methods all need to use the same code
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#DRY FTW
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import re, os, itertools
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from django.core.exceptions import ObjectDoesNotExist
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from Melodia.melodia_settings import SUPPORTED_AUDIO_EXTENSIONS
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from Melodia.melodia_settings import HASH_FUNCTION as hash
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_regex = '|'.join(( '.*' + ext + '$' for ext in SUPPORTED_AUDIO_EXTENSIONS))
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regex = re.compile(_regex, re.IGNORECASE)
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#It's hackish, but far fewer transactions to delete everything first, and add it all back.
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#If we get interrupted, just re-run it.
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song_set.all().delete()
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#Add new songs
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for dirname, dirnames, filenames in os.walk(self.root_folder):
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#For each filename that is supported
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for filename in itertools.ifilter(lambda filename: re.match(regex, filename), filenames):
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rel_url = os.path.join(dirname, filename)
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full_url = os.path.abspath(rel_url)
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new_song = Song(url = full_url)
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new_song.save()
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song_set.add(new_song)
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def _update_song_metadata(self, use_echonest = False, progress_callback = lambda x, y: None):
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"""Scan every song in this archive (database only) and make sure all songs are correct
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The progress_callback function is called with the current song being operated on first, and the total songs second."""
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#This method operates only on the songs that are in the database - if you need to make
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#sure that new songs are added, use the _scan_filesystem() method in addition
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total_songs = song_set.count()
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for index, song in enumerate(song_set.all()):
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song.populate_metadata(use_echonest = use_echonest)
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song.save()
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progress_callback(index + 1, total_songs)
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def _needs_backup(self):
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"Check if the current archive is due for a backup"
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import datetime
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prev_backup_time = self.last_backup
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current_time = datetime.datetime.now()
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delta = current_time - prev_backup_time
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if delta > datetime.timedelta(seconds = self.backup_frequency):
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return True
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else:
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return False
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def quick_scan(self):
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"Scan this archive's root folder and make sure that all songs are in the database."
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#This is a quick scan - only validate whether or not songs should exist in the database
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self._scan_filesystem()
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def scan(self):
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"Scan this archive's root folder and make sure any local metadata are correct."
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#This is a longer scan - validate whether songs should exist, and use local data to update
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#the database
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self._scan_filesystem()
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self._update_song_metadata()
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def deep_scan(self):
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"Scan this archive's root folder and make sure that all songs are in the database, and use EchoNest to update metadata as necessary"
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#This is a very long scan - validate whether songs should exist, and use Echonest to make sure
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#that metadata is as accurate as possible.
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self._scan_filesystem()
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self._update_song_metadata(use_echonest = True)
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def run_backup(self, force_backup = False):
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"Backup the current archive"
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if force_backup or self._needs_backup():
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import subprocess
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subprocess.call(['rsync', '-av', self.root_folder, self.backup_location])
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def reorganize(self, format_string, progress_function = lambda w, x, y, z: None, dry_run = False):
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"""Reorganize a music archive using a specified format string.
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Recognized escape characters:
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%a - Artist Name %A - Album Name
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%d - Disc Number %e - Number of discs
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%f - Current Filename (with extension) %g - Current Filename (no extension)
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%n - Track Number %o - Number of tracks on disc
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%y - Album year
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Note that all organization takes place relative to the archive's root folder.
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The progress_function is called with the current song number as its first argument, total songs as its second,
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current song URL as the third argument, and new URL as the fourth.
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"""
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import os, shutil, errno
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total_songs = song_set.count()
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for index, song in enumerate(song_set.all()):
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_current_filename = os.path.basename(song.url)
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_current_filename_no_extension = os.path.splitext(_current_filename)[0]
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_release_year = song.release_date.year
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new_location = format_string.replace("%a", song.artist)\
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.replace("%A", song.album)\
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.replace("%d", str(song.disc_number))\
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.replace("%e", str(song.disc_total))\
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.replace("%f", _current_filename)\
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.replace("%g", _current_filename_no_extension)\
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.replace("%n", str(song.track_number))\
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.replace("%o", str(song.track_total))\
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.replace("%y", str(_release_year))
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new_url = os.path.join(self.root_folder, new_location)
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progress_function(index + 1, total_songs, song.url, new_url)
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if not dry_run:
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new_folder = os.path.dirname(new_url)
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try:
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#`mkdir -p` functionality
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if not os.path.isdir(new_folder):
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os.makedirs(new_folder)
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#Safely copy the file - don't 'move' it, but do a full 'copy' 'rm'
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#This way if the process is ever interrupted, we have an unaltered copy
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#of the file.
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shutil.copyfile(song.url, new_url)
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shutil.copystat(song.url, new_url)
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#Notify the database about the new URL
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old_url = song.url
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song.url = new_url
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song.save()
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#Actually remove the file since all references to the original location have been removed
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os.remove(old_url)
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except OSError as exc:
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if exc.errno == errno.EEXIST and os.path.isdir(new_folder):
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#This is safe to skip - makedirs() is complaining about a folder already existing
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pass
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else: raise
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except IOError as exc:
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#shutil error - likely that folders weren't specified correctly
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raise
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@ -1,53 +0,0 @@
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from django.db import models
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import re, itertools
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class IntegerListField(models.TextField):
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"""
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Store a list of integers in a database string.
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Format is:
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[<int_1>, <int_2>, <int_3>, ... , <int_n>]
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"""
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description = "Field type for storing lists of integers."
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__metaclass__ = models.SubfieldBase
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def __init__(self, *args, **kwargs):
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super(IntegerListField, self).__init__(*args, **kwargs)
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#Convert database to python
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def to_python(self, value):
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if isinstance(value, list):
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return value
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#Process a database string
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#Validation first
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if len(value) <= 0:
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return []
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if value[0] != '[' or value[-1] != ']':
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raise ValidationError("Invalid input to parse a list of integers!")
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#Note that any non-digit string is a valid separator
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_csv_regex = "[0-9]"
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csv_regex = re.compile(_csv_regex)
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#Synonymous to:
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#string_list = filter(None, csv_regex.findall(value))
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string_list = itertools.ifilter(None, csv_regex.findall(value))
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value_list = [int(i) for i in string_list]
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return value_list
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#Convert python to database
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def get_prep_value(self, value):
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if not isinstance(value, list):
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raise ValidationError("Invalid list given to put in database!")
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separator_string = ", "
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list_elements = separator_string.join(map(str, value))
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return "[" + list_elements + "]"
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from django.db import models
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# Create your models here.
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from archive import Archive
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from song import Song
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from playlist import Playlist
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@ -1,228 +0,0 @@
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from django.db import models
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from django.core.exceptions import ObjectDoesNotExist
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from song import Song
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from listfield import IntegerListField
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import re
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from warnings import warn
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"""
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Playlist model
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Each playlist is a high-level ordering of songs. There really isn't much to a playlist - just its name, and the songs inside it.
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However, we need to have a way to guarantee song order, in addition to re-ordering. A ManyToMany field can't do this.
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As such, a custom IntegerListField is implemented - it takes a python list of ints, converts it to a text field in the DB,
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and then back to a python list. This way, we can guarantee order, and have a song appear multiple times.
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The IntegerListField itself uses the ID of each song as the int in a list. For example, a list of:
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[1, 3, 5, 17]
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Means that the playlist is made up of four songs. The order of the playlist is the song with index 1, 3, 5, and 17.
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Additionally, the ManyToMany field is included to make sure we don't use the global Songs manager - it just seems hackish.
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"""
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class Playlist (models.Model):
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"""
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The Playlist class defines the playlist model and its operations.
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Currently supported are add, move, and remove operations, as well as exporting to
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multiple formats.
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"""
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name = models.CharField(max_length = 255)
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song_list = IntegerListField()
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#This is a bit of a backup field, since technically the song PK's are in
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#the song_order field. However, it might be useful to just get a reference
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#to the songs in this playlist. Additionally, it's kind of hackish to reference
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#the global Song manager, rather than something that is specific for this playlist.
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songs = models.ManyToManyField(Song)
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def _populate_songs(self):
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"""
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Make sure that the 'songs' relation is up-to-date.
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"""
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#This operation works by getting the ID's for all songs currently in the playlist,
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#calculates what we need to add, what we need to remove, and then does it.
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#As much work as is possible is done on the python side to avoid the DB at all costs.
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current_song_ids = [song.id for song in self.songs.all()]
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current_song_ids_set = set(current_song_ids)
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new_song_ids_set = set(self.song_list)
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remove_set = current_song_ids_set.difference(new_song_ids_set)
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add_set = new_song_ids_set.difference(current_song_ids_set)
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for song_id in remove_set:
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song = self.songs.get(id = song_id)
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song.remove()
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for song_id in add_set:
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song = Song.objects.get(id = song_id) #Using the global Songs manager is unavoidable for this one
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self.songs.add(song)
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def insert(self, position, new_song):
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"""
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Insert a new song into the playlist at a specific position.
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"""
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if not isinstance(new_song, Song):
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#Not given a song reference, raise an error
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raise ValidationError("Not given a song reference to insert.")
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self.songs.add(new_song)
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self.song_list.insert(position, new_song.id)
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self._populate_songs()
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def append(self, new_song):
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"""
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Add a new song to the end of the playlist.
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"""
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if not isinstance(new_song, Song):
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#Not given a song reference, raise an error
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raise ValidationError("Not given a song reference to insert.")
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self.songs.add(new_song)
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self.song_list.append(new_song.id)
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self._populate_songs()
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def move(self, original_position, new_position):
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"""
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Move a song from one position to another
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"""
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if original_position == new_position:
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return
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song_id = self.song_list[original_position]
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#This is actually a bit more complicated than it first appears, since the index we're moving to may actually change
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#when we remove an item.
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if new_position < original_position:
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del self.song_list[original_position]
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self.song_list.insert(new_position, song_id)
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else:
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del self.song_list[original_position]
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self.song_list.insert(new_position - 1, song_id) #Account for the list indices shifting down.
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self._populate_songs()
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def remove(self, position):
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if position > len(self.song_list):
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return False
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del self.song_list[position]
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self._populate_songs()
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def export(self, playlist_type = "m3u"):
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"""
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Export this internal playlist to a file format.
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Supported formats:
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-pls
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-m3u
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Return value is a string containing the playlist -
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you can write it to file as you deem necessary.
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"""
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#Default m3u playlist type, support others as I build them.
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playlist_string = ""
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if playlist_type == "pls":
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#Playlist header
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playlist_string += "[playlist]"
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#Playlist body
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for index, song_id in enumerate(self.song_list):
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song = self.songs.get(id = song_id)
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playlist_string += "File" + str(index + 1) + "=" + song.url + "\n"
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playlist_string += "Title" + str(index + 1) + "=" + song.title + "\n"
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playlist_string += "Length" + str(index + 1) + "=" + str(song.duration) + "\n"
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#Playlist footer
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playlist_string += "NumberOfEntries=" + str(len(self.song_list))
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playlist_string += "Version=2"
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else:
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#Export m3u, default option if nothing else is recognized
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#Playlist header
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playlist_string += "#EXTM3U" + "\n"
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#Playlist body
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for song_id in self.song_list:
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song = self.songs.get(id = song_id)
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playlist_string += "#EXTINF:" + str(song.duration) + "," + song.artist + " - " + song.title + "\n"
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playlist_string += song.url + "\n\n"
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#Playlist footer
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return playlist_string
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def _import(self, playlist_string = None):
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"""
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Import and convert a playlist into native DB format.
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This function will return true if the playlist format was recognized, false otherwise.
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It will return true even if there are errors processing individual songs in the playlist.
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As a side note - the _import() name is used since python doesn't let
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you name a function import().
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"""
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#TODO: Code playlist importing
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self.song_list = []
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if not playlist_string:
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#Make sure we have a string to operate on.
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return False
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#Figure out what format we're in
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if playlist_string[0:7] == "#EXTM3U":
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#Import m3u format playlist
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print playlist_string
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#Expected format is "#EXTINF:" followed by the song url on the next line.
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line_iterator = playlist_string.split("\n").__iter__()
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#In case we end iteration early
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try:
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for line in line_iterator:
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if line[0:8] == "#EXTINF:":
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song_url = line_iterator.next() #Consume the next line
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try:
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song = Song.objects.get(url = song_url)
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self.append(song)
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except ObjectDoesNotExist:
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#The URL of our song could not be found
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warn("The playlist entry: " + song_url + " could not be found, and has not been added to your playlist.")
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continue
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#Silently end processing
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except StopIteration:
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pass
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return True
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if playlist_string[0:10] == "[playlist]":
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#Import pls format playlist
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#This one is a bit simpler - we're just looking for lines that start with "File="
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pls_regex = re.compile("^File=", re.IGNORECASE)
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for file_line in pls_regex.match(pls_regex, playlist_string):
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song_url = file_line[5:]
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try:
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song = Song.objects.get(url = song_url)
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self.append(song)
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except ObjectDoesNotExist:
|
||||
#The URL of our song could not be found
|
||||
warn("The playlist entry: " + song_url + " could not be found, and has not been added to your playlist.")
|
||||
continue
|
||||
|
||||
return True
|
||||
|
||||
#If we got here, the playlist format wasn't recognized.
|
||||
return False
|
||||
160
archiver/song.py
160
archiver/song.py
@ -1,160 +0,0 @@
|
||||
from django.db import models
|
||||
from Melodia import melodia_settings
|
||||
|
||||
from archive import Archive
|
||||
|
||||
import datetime
|
||||
import os.path
|
||||
"""
|
||||
The Song model
|
||||
Each instance of a Song represents a single music file.
|
||||
This database model is used for storing the metadata information about a song,
|
||||
and helps in doing sorting etc.
|
||||
"""
|
||||
|
||||
_default_string = "_UNAVAILABLE_"
|
||||
_default_date = datetime.datetime.now
|
||||
_default_int = -1
|
||||
|
||||
_default_rating = 0
|
||||
_default_rating_bad = 1
|
||||
_default_rating_ok = 2
|
||||
_default_rating_decent = 3
|
||||
_default_rating_good = 4
|
||||
_default_rating_excellent = 5
|
||||
_default_rating_choices = (
|
||||
(_default_rating, 'Default'),
|
||||
(_default_rating_bad, 'Bad'),
|
||||
(_default_rating_ok, 'OK'),
|
||||
(_default_rating_decent, 'Decent'),
|
||||
(_default_rating_good, 'Good'),
|
||||
(_default_rating_excellent, 'Excellent'),
|
||||
)
|
||||
|
||||
class Song (models.Model):
|
||||
|
||||
"""
|
||||
This class defines the fields and functions related to controlling
|
||||
individual music files.
|
||||
Note that the Playlist model depends on this model's PK being an int.
|
||||
"""
|
||||
|
||||
#Standard song metadata
|
||||
title = models.CharField(max_length = 64, default = _default_string)
|
||||
artist = models.CharField(max_length = 64, default = _default_string)
|
||||
album = models.CharField(max_length = 64, default = _default_string)
|
||||
year = models.IntegerField(default = _default_string)
|
||||
genre = models.CharField(max_length = 64, default = _default_string)
|
||||
bpm = models.IntegerField(default = _default_int)
|
||||
disc_number = models.IntegerField(default = _default_int)
|
||||
disc_total = models.IntegerField(default = _default_int)
|
||||
track_number = models.IntegerField(default = _default_int)
|
||||
track_total = models.IntegerField(default = _default_int)
|
||||
comment = models.CharField(default = _default_string, max_length=512)
|
||||
|
||||
#File metadata
|
||||
bit_rate = models.IntegerField(default = _default_int)
|
||||
duration = models.FloatField(default = _default_int)
|
||||
add_date = models.DateField(default = _default_date)
|
||||
echonest_song_id = models.CharField(max_length = 64, default = _default_string)
|
||||
url = models.CharField(max_length = 255)
|
||||
file_hash = melodia_settings.HASH_RESULT_DB_TYPE
|
||||
file_size = models.IntegerField(default = _default_int)
|
||||
|
||||
#Melodia metadata
|
||||
play_count = models.IntegerField(default = _default_int)
|
||||
skip_count = models.IntegerField(default = _default_int)
|
||||
rating = models.IntegerField(default = _default_int, choices = _default_rating_choices)
|
||||
|
||||
#Link back to the archive this comes from
|
||||
parent_archive = models.ForeignKey(Archive)
|
||||
|
||||
#Set a static reference to the rating options
|
||||
RATING_DEFAULT = _default_rating
|
||||
RATING_BAD = _default_rating_bad
|
||||
RATING_OK = _default_rating_ok
|
||||
RATING_DECENT = _default_rating_decent
|
||||
RATING_GOOD = _default_rating_good
|
||||
RATING_EXCELLENT = _default_rating_excellent
|
||||
|
||||
def _get_full_url(self):
|
||||
"Combine this song's URL with the URL of its parent"
|
||||
return os.path.join(parent_archive.root_folder, self.url)
|
||||
|
||||
def _file_not_changed(self):
|
||||
"Make sure the hash for this file is valid - return True if it has not changed."
|
||||
#Overload the hash function with whatever Melodia as a whole is using
|
||||
from Melodia.melodia_settings import HASH_FUNCTION as hash
|
||||
|
||||
#Check if there's a hash entry - if there is, the song may not have changed,
|
||||
#and we can go ahead and return
|
||||
if self.file_hash != None:
|
||||
song_file = open(self._get_full_url, 'rb')
|
||||
current_file_hash = hash(song_file.read())
|
||||
|
||||
if current_file_hash == self.file_hash:
|
||||
#The song data hasn't changed at all, we don't need to do anything
|
||||
return True
|
||||
|
||||
return False
|
||||
|
||||
def _grab_file_info(self):
|
||||
"Populate file-based metadata about this song."
|
||||
import os
|
||||
#Overload the hash function with whatever Melodia as a whole is using
|
||||
from Melodia.melodia_settings import HASH_FUNCTION as hash
|
||||
|
||||
file_handle = open(self._get_full_url, 'rb')
|
||||
|
||||
self.file_hash = hash(file_handle.read())
|
||||
self.file_size = os.stat(self._get_full_url).st_size
|
||||
|
||||
def _grab_metadata_echonest(self):
|
||||
"Populate this song's metadata using EchoNest"
|
||||
pass
|
||||
|
||||
def _grab_metadata_local(self):
|
||||
"Populate this song's metadata using what is locally available"
|
||||
#Use mutagen to get the song metadata
|
||||
import mutagen
|
||||
|
||||
try:
|
||||
#Use mutagen to scan local metadata - don't update anything else (i.e. play_count)
|
||||
track = mutagen.File(self._get_full_url)
|
||||
track_easy = mutagen.File(self._get_full_url, easy=True)
|
||||
|
||||
self.title = track_easy['title'][0] or _default_string
|
||||
self.artist = track_easy['artist'][0] or _default_string
|
||||
self.album_artist = track_easy['albumartist'][0] or _default_string
|
||||
self.album = track_easy['album'][0] or _default_string
|
||||
self.year = int(track_easy['date'][0][0:4]) or _default_int
|
||||
self.genre = track_easy["genre"][0] or _default_string
|
||||
|
||||
self.disc_number = int(track_easy['discnumber'][0].split('/')[0]) or _default_int
|
||||
self.disc_total = int(track_easy['discnumber'][0].split('/')[-1]) or _default_int
|
||||
self.track_number = int(track_easy['track_number'][0].split('/')[0]) or _default_int
|
||||
self.track_total = int(track_easy['track_number'][0].split('/')[-1]) or _default_int
|
||||
self.comment = track_easy['comment'][0] or _default_string
|
||||
|
||||
self.bit_rate = track.info.bitrate or _default_int
|
||||
self.duration = track.info.length or _default_int
|
||||
|
||||
except:
|
||||
#Couldn't grab the local data
|
||||
return False
|
||||
|
||||
def populate_metadata(self, use_echonest = False):
|
||||
"Populate the metadata of this song (only if file hash has changed), and save the result."
|
||||
if self._file_not_changed():
|
||||
return
|
||||
|
||||
#If we've gotten to here, we do actually need to fully update the metadata
|
||||
if use_echonest:
|
||||
self._grab_echonest()
|
||||
|
||||
else:
|
||||
self._grab_metadata_local()
|
||||
|
||||
def convert(self, output_location, output_format, progress_func = lambda x, y: None):
|
||||
"Convert a song to a new format."
|
||||
pass #Need to get pydub code in place
|
||||
4742
web/static/css/bootstrap.css
vendored
4742
web/static/css/bootstrap.css
vendored
File diff suppressed because it is too large
Load Diff
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Reference in New Issue
Block a user