Huge refactoring of media and change get_metadata function creation

This commit is contained in:
Cédric Leporcq 2021-08-13 19:09:52 +02:00
parent a2cc3a6f0c
commit 1936231ea2
5 changed files with 263 additions and 515 deletions

View File

@ -176,7 +176,7 @@ class ExifTool:
return self._exiftoolproc.process
def setvalue(self, tag, value):
"""Set tag to value(s); if value is None, will delete tag
"""Set tag to value(s); if value is None, tag will not be set
Args:
tag: str; name of tag to set
@ -191,7 +191,7 @@ class ExifTool:
"""
if value is None:
value = ""
return False
command = [f"-{tag}={value}"]
if self.overwrite and not self._context_mgr:
command.append("-overwrite_original")

View File

@ -238,12 +238,12 @@ class FileSystem(object):
'title'):
if metadata[item]:
part = metadata[item]
elif item in ('original_name'):
elif item == 'original_name':
# First we check if we have metadata['original_name'].
# We have to do this for backwards compatibility because
# we original did not store this back into EXIF.
if metadata[item]:
part = os.path.splitext(metadata['original_name'])[0]
part = metadata['original_name']
elif item in 'custom':
# Fallback string
part = mask[1:-1]

View File

@ -12,7 +12,7 @@ import logging
# load modules
from dateutil.parser import parse
import re
from dozo.exiftool import ExifToolCaching
from dozo.exiftool import ExifTool, ExifToolCaching
class Media():
@ -34,183 +34,212 @@ class Media():
extensions = PHOTO + AUDIO + VIDEO
def __init__(self, sources=None, ignore_tags=set(), logger=logging.getLogger()):
self.source = sources
self.reset_cache()
self.date_original = [
self.ignore_tags = ignore_tags
self.tags_keys = self.get_tags()
self.exif_metadata = None
self.metadata = None
self.logger = logger
def get_tags(self):
tags_keys = {}
tags_keys['date_original'] = [
'EXIF:DateTimeOriginal',
'H264:DateTimeOriginal',
'QuickTime:ContentCreateDate'
]
self.date_created = [
tags_keys['date_created'] = [
'EXIF:CreateDate',
'QuickTime:CreationDate',
'QuickTime:CreateDate',
'QuickTime:CreationDate-und-US',
'QuickTime:MediaCreateDate'
]
self.date_modified = ['File:FileModifyDate', 'QuickTime:ModifyDate']
self.camera_make_keys = ['EXIF:Make', 'QuickTime:Make']
self.camera_model_keys = ['EXIF:Model', 'QuickTime:Model']
self.album_keys = ['XMP-xmpDM:Album', 'XMP:Album']
self.title_keys = ['XMP:Title', 'XMP:DisplayName']
self.latitude_keys = [
tags_keys['date_modified'] = [
'File:FileModifyDate',
'QuickTime:ModifyDate'
]
tags_keys['camera_make'] = ['EXIF:Make', 'QuickTime:Make']
tags_keys['camera_model'] = ['EXIF:Model', 'QuickTime:Model']
tags_keys['album'] = ['XMP-xmpDM:Album', 'XMP:Album']
tags_keys['title'] = ['XMP:Title', 'XMP:DisplayName']
tags_keys['latitude'] = [
'EXIF:GPSLatitude',
'XMP:GPSLatitude',
# 'QuickTime:GPSLatitude',
'Composite:GPSLatitude'
]
self.longitude_keys = [
tags_keys['longitude'] = [
'EXIF:GPSLongitude',
'XMP:GPSLongitude',
# 'QuickTime:GPSLongitude',
'Composite:GPSLongitude'
]
self.latitude_ref_key = 'EXIF:GPSLatitudeRef'
self.longitude_ref_key = 'EXIF:GPSLongitudeRef'
self.original_name_key = 'XMP:OriginalFileName'
self.set_gps_ref = True
self.metadata = None
self.exif_metadata = None
self.ignore_tags = ignore_tags
self.logger = logger
tags_keys['latitude_ref'] = ['EXIF:GPSLatitudeRef']
tags_keys['longitude_ref'] = ['EXIF:GPSLongitudeRef']
tags_keys['original_name'] = ['XMP:OriginalFileName']
# Remove ignored tag from list
for tag_regex in self.ignore_tags:
ignored_tags = set()
for key, tags in tags_keys.items():
for n, tag in enumerate(tags):
if re.match(tag_regex, tag):
del(tags_keys[key][n])
def format_metadata(self, **kwargs):
"""Method to consistently return a populated metadata dictionary.
:returns: dict
"""
def get_file_path(self):
"""Get the full path to the video.
:returns: string
"""
return self.source
def get_extension(self):
"""Get the file extension as a lowercased string.
:returns: string or None for a non-video
"""
if(not self.is_valid()):
return None
source = self.source
return os.path.splitext(source)[1][1:]
def get_metadata(self, update_cache=False, album_from_folder=False):
"""Get a dictionary of metadata for any file.
All keys will be present and have a value of None if not obtained.
:returns: dict or None for non-text files
"""
if(not self.is_valid()):
return None
if(isinstance(self.metadata, dict) and update_cache is False):
return self.metadata
source = self.source
folder = os.path.basename(os.path.dirname(source))
album = self.get_album()
if album_from_folder and (album is None or album == ''):
album = folder
self.metadata = {
'date_original': self.get_date_attribute(self.date_original),
'date_created': self.get_date_attribute(self.date_created),
'date_modified': self.get_date_attribute(self.date_modified),
'camera_make': self.get_camera_make(),
'camera_model': self.get_camera_model(),
'latitude': self.get_coordinate('latitude'),
'longitude': self.get_coordinate('longitude'),
'album': album,
'title': self.get_title(),
'mime_type': self.get_mimetype(),
'original_name': self.get_original_name(),
'base_name': os.path.basename(os.path.splitext(source)[0]),
'ext': self.get_extension(),
'directory_path': os.path.dirname(source)
}
return self.metadata
return tags_keys
def _del_ignored_tags(self, exif_metadata):
for tag_regex in self.ignore_tags:
ignored_tags = set()
for tag in exif_metadata:
if re.search(tag_regex, tag) is not None:
ignored_tags.add(tag)
for ignored_tag in ignored_tags:
del exif_metadata[ignored_tag]
def get_mimetype(self):
"""Get the mimetype of the file.
:returns: str or None for unsupported files.
:returns: str or None
"""
if(not self.is_valid()):
return None
source = self.source
mimetype = mimetypes.guess_type(source)
mimetype = mimetypes.guess_type(self.source)
if(mimetype is None):
return None
return mimetype[0]
def _get_key_values(self, key):
"""Get the first value of a tag set
def is_valid(self):
# Disable extension check
return True
def set_album_from_folder(self, path):
"""Set the album attribute based on the leaf folder name
:returns: bool
:returns: str or None if no exif tag
"""
metadata = self.get_metadata()
if self.exif_metadata is None:
return None
# If this file has an album already set we do not overwrite EXIF
if(not isinstance(metadata, dict) or metadata['album'] is not None):
for tag in self.tags_keys[key]:
if tag in self.exif_metadata:
yield self.exif_metadata[tag]
def get_value(self, tag):
"""Get given value from EXIF.
:returns: str or None
"""
exiftool_attributes = self.get_exiftool_attributes()
if exiftool_attributes is None:
return None
if(tag not in exiftool_attributes):
return None
return exiftool_attributes[tag]
def get_date_format(self, value):
"""Formate date attribute.
:returns: datetime object or None
"""
# We need to parse a string to datetime format.
# EXIF DateTimeOriginal and EXIF DateTime are both stored
# in %Y:%m:%d %H:%M:%S format
if value is None:
return None
try:
# correct nasty formated date
regex = re.compile(r'(\d{4}):(\d{2}):(\d{2})')
if(re.match(regex , value) is not None): # noqa
value = re.sub(regex , r'\g<1>-\g<2>-\g<3>', value)
return parse(value)
except BaseException or dateutil.parser._parser.ParserError as e:
self.logger.error(e)
return None
def get_coordinates(self, key, value):
"""Get latitude or longitude value
:param str key: Type of coordinate to get. Either "latitude" or
"longitude".
:returns: float or None
"""
if value is None:
return None
if isinstance(value, str) and len(value) == 0:
# If exiftool GPS output is empty, the data returned will be a str
# with 0 length.
# https://github.com/jmathai/elodie/issues/354
return None
# Cast coordinate to a float due to a bug in exiftool's
# -json output format.
# https://github.com/jmathai/elodie/issues/171
# http://u88.n24.queensu.ca/exiftool/forum/index.php/topic,7952.0.html # noqa
this_coordinate = float(value)
direction_multiplier = 1.0
# when self.set_gps_ref != True
if key == 'latitude':
if 'EXIF:GPSLatitudeRef' in self.exif_metadata:
if self.exif_metadata['EXIF:GPSLatitudeRef'] == 'S':
direction_multiplier = -1.0
elif key == 'longitude':
if 'EXIF:GPSLongitudeRef' in self.exif_metadata:
if self.exif_metadata['EXIF:GPSLongitudeRef'] == 'W':
direction_multiplier = -1.0
return this_coordinate * direction_multiplier
return None
def get_metadata(self):
"""Get a dictionary of metadata from exif.
All keys will be present and have a value of None if not obtained.
:returns: dict
"""
# Get metadata from exiftool.
self.exif_metadata = ExifToolCaching(self.source, logger=self.logger).asdict()
# TODO to be removed
self.metadata = {}
# Retrieve selected metadata to dict
if not self.exif_metadata:
return self.metadata
for key in self.tags_keys:
formated_data = None
for value in self._get_key_values(key):
if 'date' in key:
formated_data = self.get_date_format(value)
elif key in ('latitude', 'longitude'):
formated_data = self.get_coordinates(key, value)
else:
if value is not None and value != '':
formated_data = value
else:
formated_data = None
if formated_data:
# Use this data and break
break
self.metadata[key] = formated_data
self.metadata['base_name'] = os.path.basename(os.path.splitext(self.source)[0])
self.metadata['ext'] = os.path.splitext(self.source)[1][1:]
self.metadata['directory_path'] = os.path.dirname(self.source)
return self.metadata
def has_exif_data(self):
"""Check if file has metadata, date original"""
if not self.metadata:
return False
folder = os.path.basename(metadata['directory_path'])
# If folder is empty we skip
if(len(folder) == 0):
return False
status = self.set_album(folder, path)
if status == False:
return False
return True
def set_metadata_basename(self, new_basename):
"""Update the basename attribute in the metadata dict for this instance.
This is used for when we update the EXIF title of a media file. Since
that determines the name of a file if we update the title of a file
more than once it appends to the file name.
i.e. 2015-12-31_00-00-00-my-first-title-my-second-title.jpg
:param str new_basename: New basename of file (with the old title
removed).
"""
self.get_metadata()
self.metadata['base_name'] = new_basename
def set_metadata(self, **kwargs):
"""Method to manually update attributes in metadata.
:params dict kwargs: Named parameters to update.
"""
metadata = self.get_metadata()
for key in kwargs:
if(key in metadata):
self.metadata[key] = kwargs[key]
if 'date_original' in self.metadata:
if self.metadata['date_original'] != None:
return True
return False
@classmethod
def get_class_by_file(cls, _file, classes, ignore_tags=set(), logger=logging.getLogger()):
@ -233,246 +262,7 @@ class Media():
else:
return Media(_file, ignore_tags=ignore_tags, logger=logger)
@classmethod
def get_valid_extensions(cls):
"""Static method to access static extensions variable.
:returns: tuple(str)
"""
return cls.extensions
def get_album(self):
"""Get album from EXIF
:returns: None or string
"""
if(not self.is_valid()):
return None
exiftool_attributes = self.get_exiftool_attributes()
if exiftool_attributes is None:
return None
for album_key in self.album_keys:
if album_key in exiftool_attributes:
return exiftool_attributes[album_key]
return None
def get_coordinate(self, type='latitude'):
"""Get latitude or longitude of media from EXIF
:param str type: Type of coordinate to get. Either "latitude" or
"longitude".
:returns: float or None if not present in EXIF or a non-photo file
"""
exif = self.get_exiftool_attributes()
if not exif:
return None
# The lat/lon _keys array has an order of precedence.
# The first key is writable and we will give the writable
# key precence when reading.
direction_multiplier = 1.0
for key in self.latitude_keys + self.longitude_keys:
if key not in exif:
continue
if isinstance(exif[key], six.string_types) and len(exif[key]) == 0:
# If exiftool GPS output is empty, the data returned will be a str
# with 0 length.
# https://github.com/jmathai/elodie/issues/354
continue
# Cast coordinate to a float due to a bug in exiftool's
# -json output format.
# https://github.com/jmathai/elodie/issues/171
# http://u88.n24.queensu.ca/exiftool/forum/index.php/topic,7952.0.html # noqa
this_coordinate = float(exif[key])
# TODO: verify that we need to check ref key
# when self.set_gps_ref != True
if type == 'latitude' and key in self.latitude_keys:
if self.latitude_ref_key in exif and \
exif[self.latitude_ref_key] == 'S':
direction_multiplier = -1.0
return this_coordinate * direction_multiplier
elif type == 'longitude' and key in self.longitude_keys:
if self.longitude_ref_key in exif and \
exif[self.longitude_ref_key] == 'W':
direction_multiplier = -1.0
return this_coordinate * direction_multiplier
return None
def get_exiftool_attributes(self):
"""Get attributes for the media object from exiftool.
:returns: dict, or False if exiftool was not available.
"""
source = self.source
#Cache exif metadata results and use if already exists for media
if(self.exif_metadata is None):
self.exif_metadata = ExifToolCaching(source, logger=self.logger).asdict()
for tag_regex in self.ignore_tags:
ignored_tags = set()
for tag in self.exif_metadata:
if re.search(tag_regex, tag) is not None:
ignored_tags.add(tag)
for ignored_tag in ignored_tags:
del self.exif_metadata[ignored_tag]
if not self.exif_metadata:
return False
return self.exif_metadata
def get_date_attribute(self, tag):
"""Get a date attribute.
:returns: time object or None
"""
exif = self.get_exiftool_attributes()
if not exif:
return None
# We need to parse a string from EXIF into a timestamp.
# EXIF DateTimeOriginal and EXIF DateTime are both stored
# in %Y:%m:%d %H:%M:%S format
# we split on a space and then r':|-' -> convert to int -> .timetuple()
# the conversion in the local timezone
# EXIF DateTime is already stored as a timestamp
# Sourced from https://github.com/photo/frontend/blob/master/src/libraries/models/Photo.php#L500 # noqa
for key in tag:
try:
if(key in exif):
# correct nasty formated date
regex = re.compile(r'(\d{4}):(\d{2}):(\d{2})')
if(re.match(regex , exif[key]) is not None): # noqa
exif[key] = re.sub(regex , r'\g<1>-\g<2>-\g<3>', exif[key])
return parse(exif[key])
# if(re.match('\d{4}(-|:)\d{2}(-|:)\d{2}', exif[key]) is not None): # noqa
# dt, tm = exif[key].split(' ')
# dt_list = compile(r'-|:').split(dt)
# dt_list = dt_list + compile(r'-|:').split(tm)
# dt_list = map(int, dt_list)
# return datetime(*dt_list)
except BaseException or dateutil.parser._parser.ParserError as e:
self.logger.error(e)
return None
return None
def get_camera_make(self):
"""Get the camera make stored in EXIF.
:returns: str
"""
if(not self.is_valid()):
return None
exiftool_attributes = self.get_exiftool_attributes()
if exiftool_attributes is None:
return None
for camera_make_key in self.camera_make_keys:
if camera_make_key in exiftool_attributes:
return exiftool_attributes[camera_make_key]
return None
def get_camera_model(self):
"""Get the camera make stored in EXIF.
:returns: str
"""
if(not self.is_valid()):
return None
exiftool_attributes = self.get_exiftool_attributes()
if exiftool_attributes is None:
return None
for camera_model_key in self.camera_model_keys:
if camera_model_key in exiftool_attributes:
return exiftool_attributes[camera_model_key]
return None
def get_original_name(self):
"""Get the original name stored in EXIF.
:returns: str
"""
if(not self.is_valid()):
return None
exiftool_attributes = self.get_exiftool_attributes()
if exiftool_attributes is None:
return None
if(self.original_name_key not in exiftool_attributes):
return None
return exiftool_attributes[self.original_name_key]
def get_title(self):
"""Get the title for a photo of video
:returns: str or None if no title is set or not a valid media type
"""
if(not self.is_valid()):
return None
exiftool_attributes = self.get_exiftool_attributes()
if exiftool_attributes is None:
return None
for title_key in self.title_keys:
if title_key in exiftool_attributes:
return exiftool_attributes[title_key]
return None
def reset_cache(self):
"""Resets any internal cache
"""
self.exiftool_attributes = None
self.exif_metadata = None
def set_album(self, name, path):
"""Set album EXIF tag if not already set.
:returns: True, False, None
"""
if self.get_album() is not None:
return None
tags = {}
for key in self.album_keys:
tags[key] = name
status = self.__set_tags(tags, path)
self.reset_cache()
return status
def set_date_original(self, time, path):
def set_date_taken(self, date_key, time):
"""Set the date/time a photo was taken.
:param datetime time: datetime object of when the photo was taken
@ -481,110 +271,47 @@ class Media():
if(time is None):
return False
tags = {}
formatted_time = time.strftime('%Y:%m:%d %H:%M:%S')
for key in self.date_original:
tags[key] = formatted_time
status = self.__set_tags(tags, path)
status = self.set_value('date_original', formatted_time)
if status == False:
# exif attribute date_original d'ont exist
for key in self.date_created:
tags[key] = formatted_time
status = self.__set_tags(tags, path)
self.reset_cache()
return status
def set_location(self, latitude, longitude, path):
if(not self.is_valid()):
return None
# The lat/lon _keys array has an order of precedence.
# The first key is writable and we will give the writable
# key precence when reading.
# TODO check
# tags = {
# self.latitude_keys[0]: latitude,
# self.longitude_keys[0]: longitude,
# }
tags = {}
for key in self.latitude_keys:
tags[key] = latitude
for key in self.longitude_keys:
tags[key] = longitude
# If self.set_gps_ref == True then it means we are writing an EXIF
# GPS tag which requires us to set the reference key.
# That's because the lat/lon are absolute values.
# TODO set_gps_ref = False for Video ?
if self.set_gps_ref:
if latitude < 0:
tags[self.latitude_ref_key] = 'S'
if longitude < 0:
tags[self.longitude_ref_key] = 'W'
status = self.__set_tags(tags, path)
self.reset_cache()
status = self.set_value('date_created', formatted_time)
return status
def set_coordinates(self, latitude, longitude):
status = []
if self.metadata['latitude_ref']:
latitude = abs(latitude)
if latitude > 0:
status.append(self.set_value('latitude_ref', 'N'))
else:
status.append(self.set_value('latitude_ref', 'S'))
def set_original_name(self, path, name=None):
"""Sets the original name EXIF tag if not already set.
status.append(self.set_value('latitude', latitude))
:returns: True, False, None
"""
# If EXIF original name tag is set then we return.
if self.get_original_name() is not None:
return None
if self.metadata['longitude_ref']:
longitude = abs(longitude)
if longitude > 0:
status.append(self.set_value('latitude_ref', 'E'))
else:
status.append(self.set_value('longitude_ref', 'W'))
if name == None:
name = os.path.basename(self.source)
status.append(self.set_value('longitude', longitude))
tags = {self.original_name_key: name}
status = self.__set_tags(tags, path)
self.reset_cache()
if all(status):
return True
else:
return False
return status
def set_album_from_folder(self, path):
"""Set the album attribute based on the leaf folder name
def set_title(self, title, path):
"""Set title for a photo.
:param str title: Title of the photo.
:returns: bool
"""
if(not self.is_valid()):
return None
folder = os.path.basename(os.path.dirname(self.source))
if(title is None):
return None
tags = {}
for key in self.title_keys:
tags[key] = title
status = self.__set_tags(tags, path)
self.reset_cache()
return status
def __set_tags(self, tags, path):
if(not self.is_valid()):
return None
status = ''
for tag, value in tags.items():
status = ExifToolCaching(path, self.logger).setvalue(tag, value)
if status.decode().find('unchanged') != -1 or status == '':
return False
if status.decode().find('error') != -1:
return False
return True
return set_value(self, 'album', folder)
def get_all_subclasses(cls=None):

View File

@ -56,24 +56,15 @@ class TestFilesystem:
'{%Y-%m-%b}'
]
media = Media()
exif_tags = {
'album': media.album_keys,
'camera_make': media.camera_make_keys,
'camera_model': media.camera_model_keys,
# 'date_original': media.date_original,
# 'date_created': media.date_created,
# 'date_modified': media.date_modified,
'latitude': media.latitude_keys,
'longitude': media.longitude_keys,
'original_name': [media.original_name_key],
'title': media.title_keys
}
subdirs = Path('a', 'b', 'c', 'd')
for file_path in self.file_paths:
media = Media(str(file_path))
exif_tags = {}
for key in ('album', 'camera_make', 'camera_model', 'latitude',
'longitude', 'original_name', 'title'):
exif_tags[key] = media.tags_keys[key]
exif_data = ExifToolCaching(str(file_path)).asdict()
metadata = media.get_metadata()
for item, regex in items.items():
@ -127,25 +118,22 @@ class TestFilesystem:
metadata = media.get_metadata()
date_taken = filesystem.get_date_taken(metadata)
dates = {}
for key, date in ('original', media.date_original), ('created',
media.date_created), ('modified', media.date_modified):
dates[key] = media.get_date_attribute(date)
if media.original_name_key in exif_data:
date_filename = filesystem.get_date_from_string(
exif_data[media.original_name_key])
else:
date_filename = None
for tag in media.tags_keys['original_name']:
if tag in exif_data:
date_filename = filesystem.get_date_from_string(exif_data[tag])
break
if not date_filename:
date_filename = filesystem.get_date_from_string(file_path.name)
if dates['original']:
assert date_taken == dates['original']
if media.metadata['date_original']:
assert date_taken == media.metadata['date_original']
elif date_filename:
assert date_taken == date_filename
elif dates['created']:
assert date_taken == dates['created']
elif dates['modified']:
assert date_taken == dates['modified']
elif media.metadata['date_created']:
assert date_taken == media.metadata['date_created']
elif media.metadata['date_modified']:
assert date_taken == media.metadata['date_modified']
def test_sort_files(self, tmp_path):
db = Db(tmp_path)

View File

@ -1,6 +1,7 @@
from datetime import datetime
import pytest
from pathlib import Path
import re
import shutil
import tempfile
@ -10,28 +11,60 @@ from dozo.media.media import Media
from dozo.media.audio import Audio
from dozo.media.photo import Photo
from dozo.media.video import Video
from dozo.exiftool import ExifToolCaching
from dozo.exiftool import ExifTool, ExifToolCaching
DOZO_PATH = Path(__file__).parent.parent
CACHING = True
class TestMetadata:
def setup_class(cls):
cls.src_paths, cls.file_paths = copy_sample_files()
cls.ignore_tags = ('EXIF:CreateDate', 'File:FileModifyDate',
'File:FileAccessDate', 'EXIF:Make', 'Composite:LightValue')
def test_get_exiftool_attribute(self, tmp_path):
def get_media(self):
for file_path in self.file_paths:
exif_data = ExifToolCaching(str(file_path)).asdict()
ignore_tags = ('File:FileModifyDate', 'File:FileAccessDate')
exif_data_filtered = {}
for key in exif_data:
if key not in ignore_tags:
exif_data_filtered[key] = exif_data[key]
media = Media(str(file_path), ignore_tags)
exif = media.get_exiftool_attributes()
# Ensure returned value is a dictionary
assert isinstance(exif, dict)
for tag in ignore_tags:
assert tag not in exif
assert exif == exif_data_filtered
self.exif_data = ExifTool(str(file_path)).asdict()
yield Media(str(file_path), self.ignore_tags)
def test_get_metadata(self):
for media in self.get_media():
result = media.get_metadata()
assert result
assert isinstance(media.metadata, dict), media.metadata
#check if all tags key are present
for tags_key, tags in media.tags_keys.items():
assert tags_key in media.metadata
for tag in tags:
for tag_regex in self.ignore_tags:
assert not re.match(tag_regex, tag)
# Check for valid type
for key, value in media.metadata.items():
if value or value == '':
if 'date' in key:
assert isinstance(value, datetime)
elif key in ('latitude', 'longitude'):
assert isinstance(value, float)
else:
assert isinstance(value, str)
else:
assert value is None
# Check if has_exif_data() is True if 'date_original' key is
# present, else check if it's false
has_exif_data = False
for tag in media.tags_keys['date_original']:
if tag in media.exif_metadata:
if media.get_date_format(media.exif_metadata[tag]):
has_exif_data = True
assert media.has_exif_data()
break
if has_exif_data == False:
assert not media.has_exif_data()
# Will be changed to get_metadata
# check if metatadata type are correct
# if(isinstance(self.metadata, dict) and update_cache is False):
# return self.metadata
# Album for folder implemented other place