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models.py
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models.py
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import StringIO
import hashlib
import os
import re
import shutil
from datetime import datetime
import pytz
from PIL import Image
from app import app, db, log
from util import ffmpeg
from util import hashfile, maybe_add_number_to_file_name, mkdir_p, crop_rect
from util.exiftool import ExifTool
from util.my_exceptions import MyException
TYPE_NONE = None
TYPE_PHOTO = '1'
TYPE_RAW = '2'
TYPE_VIDEO = '3'
FILE_TYPES = [TYPE_PHOTO, TYPE_RAW, TYPE_VIDEO]
FILE_TYPE_NAMES = {
TYPE_NONE: 'none',
TYPE_PHOTO: 'photo',
TYPE_RAW: 'raw',
TYPE_VIDEO: 'video'
}
EXTENSION_FILE_TYPE = {
'jpg': TYPE_PHOTO,
'thm': TYPE_PHOTO,
'cr2': TYPE_RAW,
'mp4': TYPE_VIDEO,
'mov': TYPE_VIDEO,
'lrv': TYPE_VIDEO
}
class MyFile(db.Model):
__tablename__ = 'myfiles'
id = db.Column(db.Integer, primary_key=True)
type = db.Column(db.Enum(*FILE_TYPES), default=None)
imported_date = db.Column(db.DateTime(timezone=True), default=datetime.utcnow)
created_date = db.Column(db.DateTime(timezone=True), doc='Date from file metadata')
hash = db.Column(db.String(64), index=True, unique=True, nullable=False, doc='Unique file identifier')
path = db.Column(db.String(512), doc='File path')
imported_from_path = db.Column(db.String(512), doc='File path as was before import, for history')
imprt_id = db.Column(db.Integer, db.ForeignKey('imprts.id'), doc='All files from one import have same imprt object')
imprt = db.relationship('Imprt', backref=db.backref('myfiles', lazy='dynamic', cascade='all'))
_thumb = db.Column(db.String(512), doc='Thumb path')
_preview = db.Column(db.String(512), doc='Preview path')
is_system = db.Column(db.Boolean, default=False, doc='If file needs to be hidden')
def start_exiftool(function):
'''Decorator to use for MyFile methods.
It ensures that ExifTool instance is running. Use it for all methods where ExifTool is using.
'''
def wrapper(self, *args, **kw):
if not hasattr(self, '_exiftool') or not self._exiftool:
# Make an instance of ExifTool
self._exiftool = ExifTool(executable_=app.config['EXIFTOOL_PATH'])
if not self._exiftool.running:
self._exiftool.start()
ret = function(self, *args, **kw)
self._exiftool.terminate()
else:
ret = function(self, *args, **kw)
return ret
return wrapper
def set_exiftool(self, exiftool):
self._exiftool = exiftool
def __str__(self):
return 'File t=%s (%s) %s %s' % (FILE_TYPE_NAMES[self.type], self.created_date, self.path, self.hash)
@start_exiftool
def get_date(self):
# EXIF_DateTimeOriginal = self._exiftool.get_tag('EXIF:DateTimeOriginal', self.path)
create_date = self._exiftool.get_tag('CreateDate', self.path)
if create_date:
date = datetime.strptime(create_date, '%Y:%m:%d %H:%M:%S')
if self.type == TYPE_VIDEO:
# Video files usually stores UTC time
utc_date = pytz.utc.localize(date)
else:
# All other types should store local time
tz = pytz.timezone(app.config['TIME_ZONE'])
local_date = tz.localize(date)
utc_date = local_date.astimezone(pytz.utc)
return utc_date
return None
def hashfile(self):
with open(self.path, 'rb') as f:
return hashfile(f, hashlib.sha256())
def is_duplicate(self):
if not self.hash:
raise MyException('File do not have hash. Fail to decide if its duplicate.')
if MyFile.query.filter_by(hash=self.hash).count():
return True
return False
def copy_to_lib(self):
'''
Will generate target path where to place file, copy file,
change self.path and self.imported_from.
If file situated inside media library - it will stay on its place.
'''
if self.path.startswith(app.config['PHOTOS_PATH']):
self.imported_from_path = self.path
return
if self.created_date:
# We have date when file was created. Lets put it into the date folders structure
subfolders = self.created_date.strftime('%Y/%m-%b/%d')
else:
# File with no creation date. Put it to import_date folder
subfolders = repr(self.imprt)
target_folder_path = os.path.join(app.config['AUTOIMPORT_PATH'], subfolders)
old_folder_path, file_name = os.path.split(self.path)
target_path = os.path.join(target_folder_path, file_name)
target_path = maybe_add_number_to_file_name(target_path)
mkdir_p(target_folder_path)
shutil.copy(self.path, target_path)
self.imported_from_path = self.path
self.path = target_path
@property
def dcim_number(self):
'''Integer found in file name'''
head, file_name = os.path.split(self.path)
match = re.match('.*?([0-9]+)\.[a-zA-Z]+', file_name)
if match:
return match.group(1)
return 0
@property
def thumb(self):
if not self._thumb or not os.path.isfile(self._thumb):
try:
self.gen_thumbs()
except MyException as e:
log.exception(e)
return self._thumb
@property
def preview(self):
if not self._preview or not os.path.isfile(self._preview):
try:
self.gen_thumbs()
except MyException as e:
log.exception(e)
return self._preview
@property
def rel_path(self):
return os.path.relpath(self.path, app.config['PHOTOS_PATH'])
@property
def rel_thumb(self):
if self.thumb:
return os.path.relpath(self.thumb, app.config['PHOTOS_PATH'])
return None
@property
def rel_preview(self):
if self.preview:
return os.path.relpath(self.preview, app.config['PHOTOS_PATH'])
return None
def del_thumbs(self):
''' Remove generated images. '''
if self._thumb and os.path.isfile(self._thumb):
os.remove(self._thumb)
self._thumb = ''
if self._preview and os.path.isfile(self._preview):
os.remove(self._preview)
self._preview = ''
# def gen_preview(self):
# raise NotImplementedError
def gen_cache_path(self):
'''
Generate file name based on MyFile path and CACHE_PATH.
It will be the same file_name as original file but with
path in cache dir.
'''
if not os.path.isfile(self.path):
raise MyException('MyFile.path is not a file')
file_path_relative_to_lib = os.path.relpath(self.path, app.config['PHOTOS_PATH'])
return os.path.join(app.config['CACHE_PATH'], file_path_relative_to_lib)
@property
@start_exiftool
def metadt(self):
if self.path and os.path.isfile(self.path):
with self._exiftool as et:
return et.get_metadata(self.path)
return None
def get_pil_im(self):
"""Make a PIL Image object from MyFile so PIL could deal with it"""
if self.type == TYPE_PHOTO:
# PIL understands regular images
# just open
return Image.open(self.path)
elif self.type == TYPE_RAW:
# Use ExifTool to extract preview if image is in RAW format
im_data = self._exiftool.execute('-b', '-PreviewImage', self.path)
return Image.open(StringIO.StringIO(im_data))
elif self.type == TYPE_VIDEO:
# Use ffmpeg to grab a frame if its video
im_data = ffmpeg.get_preview(self.path)
return Image.open(StringIO.StringIO(im_data))
else:
log.warning('get_pil_im is not emplemented for %s' % self)
@start_exiftool
def gen_thumbs(self, save=True):
'''
Remove old thumb and make new one.
'''
if self.path and os.path.isfile(self.path):
self.del_thumbs()
# Make a name for the thumbs
preview_path = self.gen_cache_path() + '.preview.jpg'
thumb_path = self.gen_cache_path() + '.thumb.jpg'
# Be sure directories are created
mkdir_p(os.path.dirname(thumb_path))
im = self.get_pil_im()
if not im:
return
try:
# Fix EXIF orientation
EXIF_Orientation = self._exiftool.get_tag('EXIF:Orientation', self.path)
if EXIF_Orientation:
if EXIF_Orientation == 3:
im = im.rotate(180, expand=True)
elif EXIF_Orientation == 6:
im = im.rotate(270, expand=True)
elif EXIF_Orientation == 8:
im = im.rotate(90, expand=True)
except:
pass
# Generate preview
im.thumbnail(app.config['PREVIEW_SIZE'], Image.ANTIALIAS)
im.save(preview_path)
self._preview = preview_path
# From preview make thumb
# im = crop_rect(im)
im.thumbnail(app.config['THUMB_SIZE'], Image.ANTIALIAS)
im.save(thumb_path)
self._thumb = thumb_path
# We need to persist paths in case thumbs were generated on the fly
if save:
db.session.add(self)
db.session.commit()
class Imprt(db.Model):
'''
Model to store list of files imported at once
'''
__tablename__ = 'imprts'
id = db.Column(db.Integer, primary_key=True)
date = db.Column(db.DateTime(timezone=True), default=datetime.utcnow)
def count_files(self):
return self.myfiles.count()
def __str__(self):
return self.__repr__()
def __repr__(self):
# Affects library folder structure
return 'import_%i-%s' % (self.id, self.date.strftime('%Y.%m.%d'))