epicyon/media.py

117 lines
3.7 KiB
Python

__filename__ = "media.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "0.0.1"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
from blurhash import blurhash_encode as blurencode
from PIL import Image
import numpy
import os
import sys
import json
import commentjson
import datetime
from auth import createPassword
from shutil import copyfile
from shutil import rmtree
from shutil import move
def removeMetaData(imageFilename: str,outputFilename: str):
imageFile = open(imageFilename)
image = Image.open(imageFilename)
data = list(image.getdata())
imageWithoutExif = Image.new(image.mode, image.size)
imageWithoutExif.putdata(data)
imageWithoutExif.save(outputFilename)
def getImageHash(imageFilename: str) -> str:
return blurencode(numpy.array(Image.open(imageFilename).convert("RGB")))
def isImage(imageFilename: str) -> bool:
if imageFilename.endswith('.png') or \
imageFilename.endswith('.jpg') or \
imageFilename.endswith('.gif'):
return True
return False
def createMediaDirs(baseDir: str,mediaPath: str) -> None:
if not os.path.isdir(baseDir+'/media'):
os.mkdir(baseDir+'/media')
if not os.path.isdir(baseDir+'/'+mediaPath):
os.mkdir(baseDir+'/'+mediaPath)
def getMediaPath() -> str:
currTime=datetime.datetime.utcnow()
weeksSinceEpoch=int((currTime - datetime.datetime(1970,1,1)).days/7)
return 'media/'+str(weeksSinceEpoch)
def attachImage(baseDir: str,httpPrefix: str,domain: str,port: int, \
postJson: {},imageFilename: str,description: str, \
useBlurhash: bool) -> {}:
"""Attaches an image to a json object post
The description can be None
Blurhash is optional, since low power systems may take a long time to calculate it
"""
if not isImage(imageFilename):
return postJson
mediaType='image/png'
fileExtension='png'
if imageFilename.endswith('.jpg'):
mediaType='image/jpeg'
fileExtension='jpg'
if imageFilename.endswith('.gif'):
mediaType='image/gif'
fileExtension='gif'
if port!=80 and port!=443:
if ':' not in domain:
domain=domain+':'+str(port)
mPath=getMediaPath()
mediaPath=mPath+'/'+createPassword(32)+'.'+fileExtension
if baseDir:
createMediaDirs(baseDir,mPath)
mediaFilename=baseDir+'/'+mediaPath
attachmentJson={
'mediaType': mediaType,
'name': description,
'type': 'Document',
'url': httpPrefix+'://'+domain+'/'+mediaPath
}
if useBlurhash:
attachmentJson['blurhash']=getImageHash(imageFilename)
postJson['attachment']=[attachmentJson]
if baseDir:
removeMetaData(imageFilename,mediaFilename)
#copyfile(imageFilename,mediaFilename)
return postJson
def archiveMedia(baseDir: str,archiveDirectory: str,maxWeeks=4) -> None:
"""Any media older than the given number of weeks gets archived
"""
currTime=datetime.datetime.utcnow()
weeksSinceEpoch=int((currTime - datetime.datetime(1970,1,1)).days/7)
minWeek=weeksSinceEpoch-maxWeeks
if archiveDirectory:
if not os.path.isdir(archiveDirectory):
os.mkdir(archiveDirectory)
if not os.path.isdir(archiveDirectory+'/media'):
os.mkdir(archiveDirectory+'/media')
for subdir, dirs, files in os.walk(baseDir+'/media'):
for weekDir in dirs:
if int(weekDir)<minWeek:
if archiveDirectory:
move(os.path.join(baseDir+'/media', weekDir),archiveDirectory+'/media')
else:
# archive to /dev/null
rmtree(os.path.join(baseDir+'/media', weekDir))