class ViewerSession(object): archFiles = None items = None def __init__(self): self.archHandle = None self.lastAccess = time.time() self.pruneAge = 60*120 # in Seconds, prune if no access for 120 minutes def shouldPrune(self): lastChange = time.time() - self.lastAccess if lastChange > self.pruneAge: return True else: return False def checkOpenArchive(self, archPath): if not self.archHandle or self.archHandle.archPath != archPath: self.archHandle = ArchiveReader(archPath) self.lastAccess = time.time() def getItemByInternalPath(self, internalPath): itemContent = self.archHandle.open(internalPath) return itemContent, internalPath def __del__(self): if self.archHandle: del self.archHandle
def checkOpenArchive(self, archPath): if not self.archHandle or self.archHandle.archPath != archPath: self.archHandle = ArchiveReader(archPath) self.buildImageLookupDict() self.lastAccess = time.time()
class ViewerSession(object):
archFiles = None
items = None
def __init__(self):
self.archHandle = None
self.lastAccess = time.time()
self.pruneAge = 60*120 # in Seconds, prune if no access for 120 minutes
def shouldPrune(self):
lastChange = time.time() - self.lastAccess
if lastChange > self.pruneAge:
return True
else:
return False
def checkOpenArchive(self, archPath):
if not self.archHandle or self.archHandle.archPath != archPath:
self.archHandle = ArchiveReader(archPath)
self.buildImageLookupDict()
self.lastAccess = time.time()
def getImageNames(self):
if not self.archHandle:
raise ValueError()
self.archFiles = self.archHandle.getFileList()
ret = []
for item in self.archFiles:
if nt.isProbablyImage(item):
ret.append(item)
if not ret:
raise ValueError("No Images in archive! \n Archive contents = %s" % "\n ".join(self.archFiles))
return ret
def buildImageLookupDict(self):
names = self.getImageNames()
# Natsorted evaluates '-' to mean a negative number
# This breaks sorting (it reverses it) for filenames where the spaces
# have been replaced with hyphens.
# As a work-around, and since I do not currently anticipate the need to
# properly sort negative numbers, use a lambda
# to replace all hyphens with spaces for sorting.
names = natsorted(names, key=lambda x: x.replace("-", " "))
self.items = dict(zip(range(len(names)), names))
def getKeys(self):
try:
keys = list(self.items.keys())
return keys
except AttributeError:
raise ValueError("No Images in archive! \n Archive contents = %s" % "\n ".join(self.archFiles))
def getItemByKey(self, itemKey):
if not itemKey in self.items:
raise KeyError("Invalid key. Not in archive!")
internalPath = self.items[itemKey]
itemContent = self.archHandle.open(internalPath)
return itemContent, internalPath
def __del__(self):
if self.archHandle:
del self.archHandle
def checkOpenArchive(self, archPath):
if not self.archHandle or self.archHandle.archPath != archPath:
self.archHandle = ArchiveReader(archPath)
self.buildImageLookupDict()
self.lastAccess = time.time()
class ViewerSession(object):
archFiles = None
items = None
def __init__(self):
self.archHandle = None
self.lastAccess = time.time()
self.pruneAge = 60 * 120 # in Seconds, prune if no access for 120 minutes
def shouldPrune(self):
lastChange = time.time() - self.lastAccess
if lastChange > self.pruneAge:
return True
else:
return False
def checkOpenArchive(self, archPath):
if not self.archHandle or self.archHandle.archPath != archPath:
self.archHandle = ArchiveReader(archPath)
self.buildImageLookupDict()
self.lastAccess = time.time()
def getImageNames(self):
if not self.archHandle:
raise ValueError()
ret = []
fcnt = 0
for item in self.archHandle.getFileList():
fcnt += 1
if nt.isProbablyImage(item):
ret.append(item)
if not ret:
raise ValueError(
"No Images in archive (but %s files)! \n Archive contents = %s"
% (fcnt, "\n ".join(self.archHandle.getFileList())))
return ret
def buildImageLookupDict(self):
names = self.getImageNames()
# Natsorted evaluates '-' to mean a negative number
# This breaks sorting (it reverses it) for filenames where the spaces
# have been replaced with hyphens.
# As a work-around, and since I do not currently anticipate the need to
# properly sort negative numbers, use a lambda
# to replace all hyphens with spaces for sorting.
names = natsorted(names, key=lambda x: x.replace("-", " "))
self.items = dict(zip(range(len(names)), names))
def getKeys(self):
try:
keys = list(self.items.keys())
return keys
except AttributeError:
raise ValueError("No Images in archive! \n Archive contents = %s" %
"\n ".join(self.archHandle.getFileList()))
def getItemByKey(self, itemKey):
if not itemKey in self.items:
raise KeyError("Invalid key. Not in archive!")
internalPath = self.items[itemKey]
itemContent = self.archHandle.open(internalPath)
return itemContent, internalPath
def __del__(self):
if self.archHandle:
del self.archHandle
