83490b51eb
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@3986 fd906abe-77d9-0310-91a1-e0d9ade77398
110 lines
3.6 KiB
Python
110 lines
3.6 KiB
Python
#
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# Copyright (c) 2009 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Media asset file adapter.
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Original authors: Johann Schimpf, Erich Seifert.
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$Id$
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"""
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from datetime import datetime
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from logging import getLogger
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import os
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from zope import component
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from zope.cachedescriptors.property import Lazy
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from zope.interface import implements
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from cybertools.media.asset import MediaAssetFile
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from cybertools.storage.interfaces import IExternalStorage
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from loops.media.interfaces import IMediaAsset
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from loops.resource import ExternalFileAdapter
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from loops.type import TypeInterfaceSourceList
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transformPrefix = 'asset_transform.'
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TypeInterfaceSourceList.typeInterfaces += (IMediaAsset,)
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class MediaAsset(MediaAssetFile, ExternalFileAdapter):
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""" Concept adapter for extracting metadata from assets and for creating
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transformation variants.
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"""
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implements(IMediaAsset)
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_adapterAttributes = ExternalFileAdapter._adapterAttributes + ('modified',)
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isMediaAsset = True
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def __init__(self, context):
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ExternalFileAdapter.__init__(self, context)
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@Lazy
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def rules(self):
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result = {}
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for key, value in self.options.items():
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if key.startswith(transformPrefix):
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variant = key[len(transformPrefix):]
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result[variant] = value
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return result
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def setData(self, data):
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ExternalFileAdapter.setData(self, data)
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if data and self.getMimeType().startswith('image/'):
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self.transform(self.rules)
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data = property(ExternalFileAdapter.getData, setData)
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def setExternalAddress(self, addr):
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ExternalFileAdapter.setExternalAddress(self, addr)
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if addr and self.getMimeType().startswith('image/'):
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self.transform(self.rules)
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externalAddress = property(ExternalFileAdapter.getExternalAddress,
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setExternalAddress)
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def getMimeType(self):
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return self.context.contentType or ''
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def getDataPath(self):
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storage = component.queryUtility(IExternalStorage, name=self.storageName)
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#print '***', self.storageName, self.storageParams, self.options
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if storage is not None:
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return storage.getDir(self.externalAddress,
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self.storageParams['subdirectory'])
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def getOriginalData(self):
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return ExternalFileAdapter.getData(self)
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def getModified(self):
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d = getattr(self.context, '_modified', None)
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if not d:
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dp = self.getDataPath()
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if dp is not None:
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try:
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return datetime.fromtimestamp(os.path.getmtime(dp))
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except Exception, e:
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getLogger('loops.media.asset.MediaAsset').warn(e)
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return None
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return d
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def setModified(self, value):
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self.context._modified = value
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modified = property(getModified, setModified)
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