def __init__(self, logger, thumbnailSize, storeLocally, gui):
super(RemotePicturesHandler, self).__init__()
self.logger = logger
self._thumbnailSize = thumbnailSize
self._storeLocally = storeLocally
self._gui = gui
self._storage = RemotePicturesStorage(self, self.logger)
self._currentlyDownloading = set() # set of currently downloading pictures
self._lock = loggingMutex(u"Remote Pictures Handler", qMutex=True, logging=get_settings().get_verbose())
self._createThumbnailAndAddCategory = AsyncCall(self,
self.logger,
self._createThumbnail,
self._addCategoryAndCloseFile)
self._createAndChangeThumbnail = AsyncCall(self,
self.logger,
self._createThumbnail,
self._changeThumbnail)
self._loadPictures.connect(self._loadPicturesSlot)
self._processRemotePicture.connect(self._processRemotePictureSlot)
self._checkCategory.connect(self._checkCategorySlot)
self._thumbnailSizeChanged.connect(self._thumbnailSizeChangedSlot)
self._storeLocallyChanged.connect(self._storeLocallyChangedSlot)
class RemotePicturesHandler(QObject):
addCategory = pyqtSignal(object, object, int) # category, thumbnail path, thumbnail size
categoryThumbnailChanged = pyqtSignal(object, object, int) # category, thumbnail path, thumbnail size
categoriesChanged = pyqtSignal()
# cat, picID, picRow, hasPrev, hasNext
displayImageInGui = pyqtSignal(object, int, list, bool, bool)
_loadPictures = pyqtSignal()
_processRemotePicture = pyqtSignal(str, object) # data, ip
_checkCategory = pyqtSignal(object)
_thumbnailSizeChanged = pyqtSignal(int)
_storeLocallyChanged = pyqtSignal(bool)
def __init__(self, logger, thumbnailSize, storeLocally, gui):
super(RemotePicturesHandler, self).__init__()
self.logger = logger
self._thumbnailSize = thumbnailSize
self._storeLocally = storeLocally
self._gui = gui
self._storage = RemotePicturesStorage(self, self.logger)
self._currentlyDownloading = set() # set of currently downloading pictures
self._lock = loggingMutex(u"Remote Pictures Handler", qMutex=True, logging=get_settings().get_verbose())
self._createThumbnailAndAddCategory = AsyncCall(self,
self.logger,
self._createThumbnail,
self._addCategoryAndCloseFile)
self._createAndChangeThumbnail = AsyncCall(self,
self.logger,
self._createThumbnail,
self._changeThumbnail)
self._loadPictures.connect(self._loadPicturesSlot)
self._processRemotePicture.connect(self._processRemotePictureSlot)
self._checkCategory.connect(self._checkCategorySlot)
self._thumbnailSizeChanged.connect(self._thumbnailSizeChangedSlot)
self._storeLocallyChanged.connect(self._storeLocallyChangedSlot)
def loadPictures(self):
self._loadPictures.emit()
@loggingSlot()
def _loadPicturesSlot(self):
categories = self._storage.getCategories(alsoEmpty=False)
for row in categories:
category = row[RemotePicturesStorage.CAT_TITLE_COL]
thumbnailPath = row[RemotePicturesStorage.CAT_THUMBNAIL_COL]
picFile = None
picURL = None
if not thumbnailPath or not os.path.exists(thumbnailPath):
thumbnailPath = None
# create thumbnail from first image
_picID, picRow = self._storage.getLatestPicture(category)
picFile = picRow[RemotePicturesStorage.PIC_FILE_COL]
if picFile and os.path.exists(picFile):
picFile = picRow[RemotePicturesStorage.PIC_FILE_COL]
else:
picURL = picRow[RemotePicturesStorage.PIC_URL_COL]
self._addCategory(category,
thumbnailPath=thumbnailPath,
imageFile=picFile,
imageURL=picURL)
def finish(self):
pass
def _getPicturesDirectory(self):
picDir = get_settings().get_config("remote_pictures")
if not os.path.exists(picDir):
os.makedirs(picDir)
return picDir
def _createPictureFile(self, category, ext='.jpg'):
prefix = sanitizeForFilename(category)
return tempfile.NamedTemporaryFile(suffix=ext, prefix=prefix, dir=self._getPicturesDirectory(), delete=False)
def _createThumbnail(self, inFile, inPath, inURL, inImage, category):
"""Called asynchronously"""
try:
fileName = None
# if category already has a thumbnail, overwrite
curPath = self._storage.getCategoryThumbnail(category)
if curPath is not None:
try:
# check if we can write the file
open(curPath, 'wb').close()
fileName = curPath
except:
pass
if fileName is None:
outFile = self._createPictureFile(category)
fileName = outFile.name
outFile.close()
oldImage = None
imageData = None
if inImage:
oldImage = inImage
elif inFile:
imageData = inFile.read()
elif inPath and os.path.exists(inPath):
with contextlib.closing(open(inPath, 'rb')) as inFile:
imageData = inFile.read()
else:
imageData = urllib2.urlopen(inURL.encode('utf-8')).read()
if oldImage is None:
oldImage = QImage.fromData(imageData)
if oldImage.width() > CategoriesModel.MAX_THUMBNAIL_SIZE or oldImage.height() > CategoriesModel.MAX_THUMBNAIL_SIZE:
newImage = oldImage.scaled(CategoriesModel.MAX_THUMBNAIL_SIZE,
CategoriesModel.MAX_THUMBNAIL_SIZE,
Qt.KeepAspectRatio,
Qt.SmoothTransformation)
else:
# no up-scaling here
newImage = oldImage
newImage.save(fileName, 'jpeg')
return fileName, inFile, category
except:
self.logger.exception("Error trying to create thumbnail for category")
return None, inFile, category
def __setCategoryThumbnail(self, thumbnailPath, imageFile, category):
if thumbnailPath is not None:
# store thumbnail path in database
self._storage.setCategoryThumbnail(category, thumbnailPath)
if imageFile is not None:
imageFile.close()
@loggingSlot(object)
def _addCategoryAndCloseFile(self, aTuple):
"""Called synchronously, with result of _createThumbnail"""
thumbnailPath, imageFile, category = aTuple
self.__setCategoryThumbnail(thumbnailPath, imageFile, category)
self.addCategory.emit(category, thumbnailPath, self._thumbnailSize)
@loggingSlot(object)
def _changeThumbnail(self, aTuple):
"""Called synchronously, with result of _createThumbnail"""
thumbnailPath, imageFile, category = aTuple
self.__setCategoryThumbnail(thumbnailPath, imageFile, category)
self.categoryThumbnailChanged.emit(category, thumbnailPath, self._thumbnailSize)
def _addCategory(self, category, thumbnailPath=None, imageFile=None, imageURL=None):
# cache category image
closeImmediately = True
try:
if thumbnailPath != None:
self.addCategory.emit(category, thumbnailPath, self._thumbnailSize)
elif (imageFile and os.path.exists(imageFile)) or imageURL is not None:
# create thumbnail asynchronously, then close imageFile
self._createThumbnailAndAddCategory(None, imageFile, imageURL, None, category)
closeImmediately = False
else:
raise Exception("No image path specified.")
finally:
if closeImmediately and imageFile != None:
imageFile.close()
def thumbnailSizeChanged(self, newValue):
self._thumbnailSizeChanged.emit(newValue)
@loggingSlot(int)
def _thumbnailSizeChangedSlot(self, newValue):
self._thumbnailSize = newValue
def storeLocallyChanged(self, newValue):
self._storeLocallyChanged.emit(newValue)
@loggingSlot(bool)
def _storeLocallyChangedSlot(self, newValue):
self._storeLocally = newValue
def checkCategory(self, cat):
self._checkCategory.emit(cat)
@loggingSlot(object)
def _checkCategorySlot(self, cat):
cat = convert_string(cat)
if not self._storage.hasCategory(cat):
self._storage.addEmptyCategory(cat)
self.categoriesChanged.emit()
def _addPicture(self, imageFile, imagePath, url, category, description, sender):
if category == None:
category = PrivacySettings.NO_CATEGORY
catAdded = self._storage.addPicture(category,
url if url else None,
description if description else None,
imagePath,
time(),
None,
sender if sender else None)
if catAdded:
if imageFile is not None:
imageFile.seek(0)
# image file will be closed after thumbnail was created
self._createThumbnailAndAddCategory(imageFile, imagePath, url, None, category)
elif imageFile is not None:
imageFile.close()
if self._gui.isShowingCategory(category):
# if category is open, display image immediately
self._displayImage(category, self._storage.getLatestPicture(category))
def _hasPicture(self, cat, url):
return self._storage.hasPicture(cat, url)
def _displayImage(self, category, result):
picID, picRow = result
if picID is None:
self.logger.error("Cannot display picture %d (picture not found).", picID)
self.displayImageInGui.emit(category,
picID,
list(picRow),
self._storage.hasPrevious(category, picID),
self._storage.hasNext(category, picID))
self._storage.seenPicture(picID)
@loggingSlot(QThread, object)
def _errorDownloadingPicture(self, thread, err):
self.logger.error("Error downloading picture from url %s: %s", convert_string(thread.url), err)
thread.deleteLater()
@loggingFunc
def _downloadedPicture(self, category, description, sender, thread, url):
if self._hasPicture(category, url):
self.logger.warning("Picture already in storage: %s", url)
return
name = "New Remote Picture"
if category != None:
name = name + " in category %s" % category
# create temporary image file to display in notification
url = convert_string(url)
thread.target.flush()
displayNotification(name, description, self.logger, thread.target.name)
self._addPicture(thread.target,
thread.target.name if self._storeLocally else None,
url,
category,
description,
sender)
def _extractPicture(self, url, category, description, sender):
if not self._hasPicture(category, url):
ext = os.path.splitext(urlparse(url.encode('utf-8')).path)[1]
if self._storeLocally:
target = self._createPictureFile(category, ext=ext)
else:
target = tempfile.NamedTemporaryFile(suffix=ext)
downloadThread = DownloadThread(self, self.logger, url, target)
downloadThread.success.connect(partial(self._downloadedPicture, category, description, sender))
downloadThread.error.connect(self._errorDownloadingPicture)
downloadThread.finished.connect(downloadThread.deleteLater)
downloadThread.start()
else:
self.logger.debug("Remote Pics: Downloaded this url before, won't do it again: %s", url)
def processRemotePicture(self, value, ip):
self._processRemotePicture.emit(value, ip)
@loggingSlot(str, object)
def _processRemotePictureSlot(self, value, ip):
value = convert_raw(value)
ip = convert_string(ip)
with contextlib.closing(StringIO(value)) as strIn:
reader = csv.reader(strIn, delimiter = ' ', quotechar = '"')
valueList = [aValue.decode('utf-8') for aValue in reader.next()]
url = valueList[0]
desc = None
cat = PrivacySettings.NO_CATEGORY
if len(valueList) > 1:
desc = valueList[1]
if len(valueList) > 2:
cat = valueList[2]
self._lock.lock()
try:
if url in self._currentlyDownloading:
self.logger.debug("Already downloading picture %s", url)
return
self._currentlyDownloading.add(url)
finally:
self._lock.unlock()
self._extractPicture(url, cat, desc, get_peers().getPeerID(pIP=ip))
def getCategories(self, alsoEmpty):
return self._storage.getCategories(alsoEmpty)
def getCategoryNames(self, alsoEmpty):
return self._storage.getCategoryNames(alsoEmpty)
def willIgnorePeerAction(self, category, url):
self._lock.lock()
try:
if url in self._currentlyDownloading:
return True
finally:
self._lock.unlock()
return self._hasPicture(category, url)
################# PUBLIC SLOTS ##################
@loggingSlot(object)
def openCategory(self, category):
category = convert_string(category)
if not self._storage.hasCategory(category):
self.logger.error("Cannot open category %s (category not found).", category)
return
self._displayImage(category, self._storage.getLatestPicture(category))
@loggingSlot(object, int)
def displayPrev(self, cat, curID):
cat = convert_string(cat)
self._displayImage(cat, self._storage.getPreviousPicture(cat, curID))
@loggingSlot(object, int)
def displayNext(self, cat, curID):
cat = convert_string(cat)
self._displayImage(cat, self._storage.getNextPicture(cat, curID))
@loggingSlot(object, object, object)
def pictureDownloaded(self, category, url, picData):
if self._storeLocally:
ext = os.path.splitext(urlparse(url.encode('utf-8')).path)[1]
with contextlib.closing(self._createPictureFile(category, ext)) as picFile:
picFile.write(picData)
self._storage.setPictureFile(category, url, picFile.name)
@loggingSlot(object, QImage)
def setCategoryThumbnail(self, category, image):
self._createAndChangeThumbnail(None, None, None, image, category)
