9d89ab30ec
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@1795 fd906abe-77d9-0310-91a1-e0d9ade77398
495 lines
16 KiB
Python
495 lines
16 KiB
Python
#
|
|
# Copyright (c) 2005 Helmut Merz helmutm@cy55.de
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
#
|
|
|
|
"""
|
|
Definition of the Concept class.
|
|
|
|
$Id$
|
|
"""
|
|
|
|
from zope import component, schema
|
|
from zope.app import zapi
|
|
from zope.app.container.btree import BTreeContainer
|
|
from zope.app.container.contained import Contained
|
|
from zope.app.file.image import Image
|
|
from zope.app.security.interfaces import IAuthentication
|
|
from zope.filerepresentation.interfaces import IReadFile, IWriteFile
|
|
from zope.cachedescriptors.property import Lazy
|
|
from zope.component import adapts
|
|
from zope.dublincore.interfaces import IZopeDublinCore
|
|
from zope.i18nmessageid import MessageFactory
|
|
from zope.interface import implements
|
|
from zope.size.interfaces import ISized
|
|
from zope.security.proxy import removeSecurityProxy
|
|
from zope.traversing.api import getName, getParent
|
|
from persistent import Persistent
|
|
from cStringIO import StringIO
|
|
|
|
from zope.lifecycleevent import ObjectModifiedEvent, Attributes
|
|
from zope.event import notify
|
|
|
|
from cybertools.relation.registry import getRelations
|
|
from cybertools.relation.interfaces import IRelatable
|
|
from cybertools.storage.interfaces import IExternalStorage
|
|
from cybertools.text.interfaces import ITextTransform
|
|
from cybertools.typology.interfaces import IType, ITypeManager
|
|
|
|
from loops.interfaces import IBaseResource, IResource
|
|
from loops.interfaces import IFile, IExternalFile, INote
|
|
from loops.interfaces import IDocument, ITextDocument, IDocumentSchema, IDocumentView
|
|
from loops.interfaces import IMediaAsset, IMediaAssetView
|
|
from loops.interfaces import IResourceManager, IResourceManagerContained
|
|
from loops.interfaces import ITypeConcept
|
|
from loops.interfaces import ILoopsContained
|
|
from loops.interfaces import IIndexAttributes
|
|
from loops.concept import ResourceRelation
|
|
from loops.common import ResourceAdapterBase
|
|
from loops.versioning.util import getMaster
|
|
from loops.view import TargetRelation
|
|
|
|
_ = MessageFactory('loops')
|
|
|
|
|
|
class ResourceManager(BTreeContainer):
|
|
|
|
implements(IResourceManager, ILoopsContained)
|
|
|
|
def getLoopsRoot(self):
|
|
return zapi.getParent(self)
|
|
|
|
def getViewManager(self):
|
|
return self.getLoopsRoot().getViewManager()
|
|
|
|
|
|
class Resource(Image, Contained):
|
|
|
|
# TODO: remove dependency on Image
|
|
|
|
implements(IBaseResource, IResource, IResourceManagerContained,
|
|
IRelatable, ISized)
|
|
|
|
proxyInterface = IMediaAssetView # obsolete!
|
|
|
|
storageName = None
|
|
|
|
_size = _width = _height = 0
|
|
|
|
def __init__(self, title=u''):
|
|
super(Resource, self).__init__()
|
|
self.title = title
|
|
|
|
_title = u''
|
|
def getTitle(self): return self._title
|
|
def setTitle(self, title): self._title = title
|
|
title = property(getTitle, setTitle)
|
|
|
|
_description = u''
|
|
def getDescription(self): return self._description
|
|
def setDescription(self, description): self._description = description
|
|
description = property(getDescription, setDescription)
|
|
|
|
def getResourceType(self):
|
|
cm = self.getLoopsRoot().getConceptManager()
|
|
typePred = cm.getTypePredicate()
|
|
if typePred is None:
|
|
return None
|
|
concepts = self.getConcepts([typePred])
|
|
# TODO (?): check for multiple types (->Error)
|
|
return concepts and concepts[0] or cm.get('file', None)
|
|
def setResourceType(self, concept):
|
|
if concept is None: # this should not happen
|
|
return
|
|
current = self.getResourceType()
|
|
if current != concept:
|
|
# change storage if necessary, and migrate data
|
|
oldType = IType(self)
|
|
from loops.type import ConceptTypeInfo
|
|
newType = ConceptTypeInfo(concept)
|
|
self.migrateStorage(oldType, newType)
|
|
# assign new type parent
|
|
typePred = self.getLoopsRoot().getConceptManager().getTypePredicate()
|
|
if typePred is None:
|
|
raise ValueError('No type predicate found for ' + getName(self))
|
|
if current is not None:
|
|
self.deassignConcept(current, [typePred])
|
|
self.assignConcept(concept, typePred)
|
|
resourceType = property(getResourceType, setResourceType)
|
|
|
|
def getType(self):
|
|
return self.resourceType
|
|
|
|
def _setData(self, data):
|
|
#if not data:
|
|
# return
|
|
dataFile = StringIO(data) # let File tear it into pieces
|
|
super(Resource, self)._setData(dataFile)
|
|
if not self.contentType:
|
|
self.guessContentType(data)
|
|
self._size = len(data)
|
|
data = property(Image._getData, _setData)
|
|
|
|
def guessContentType(self, data):
|
|
# probably obsolete, use zope.contenttype.guess_content_type()
|
|
if not isinstance(data, str): # seems to be a file object
|
|
data = data.read(20)
|
|
if data.startswith('%PDF'):
|
|
self.contentType = 'application/pdf'
|
|
|
|
_contentType = u''
|
|
def setContentType(self, contentType):
|
|
if contentType:
|
|
self._contentType = contentType
|
|
def getContentType(self): return self._contentType
|
|
contentType = property(getContentType, setContentType)
|
|
|
|
def getLoopsRoot(self):
|
|
return zapi.getParent(self).getLoopsRoot()
|
|
|
|
# concept relations
|
|
# note: we always use the master version for relations, see getMaster()
|
|
|
|
def getClients(self, relationships=None):
|
|
if relationships is None:
|
|
relationships = [TargetRelation]
|
|
obj = getMaster(self) # use the master version for relations
|
|
rels = getRelations(second=obj, relationships=relationships)
|
|
return [r.first for r in rels]
|
|
|
|
def getConceptRelations (self, predicates=None, concept=None):
|
|
predicates = predicates is None and ['*'] or predicates
|
|
obj = getMaster(self)
|
|
relationships = [ResourceRelation(None, obj, p) for p in predicates]
|
|
# TODO: sort...
|
|
return getRelations(first=concept, second=obj, relationships=relationships)
|
|
|
|
def getConcepts(self, predicates=None):
|
|
obj = getMaster(self)
|
|
return [r.first for r in obj.getConceptRelations(predicates)]
|
|
|
|
def assignConcept(self, concept, predicate=None):
|
|
obj = getMaster(self)
|
|
concept.assignResource(obj, predicate)
|
|
|
|
def deassignConcept(self, concept, predicates=None):
|
|
obj = getMaster(self)
|
|
concept.deassignResource(obj, predicates)
|
|
|
|
# ISized interface
|
|
|
|
def getSize(self):
|
|
if self._size:
|
|
return self._size
|
|
tp = IType(self, None)
|
|
if tp is not None:
|
|
ti = tp.typeInterface
|
|
if ti is not None:
|
|
return len(ti(self).data)
|
|
return len(self.data)
|
|
|
|
def sizeForSorting(self):
|
|
return 'byte', self.getSize()
|
|
|
|
def sizeForDisplay(self):
|
|
size = self.getSize()
|
|
kb = 1024.0
|
|
unit = 'B'
|
|
if size < kb:
|
|
return '%.0f %s' % (size, unit)
|
|
unit = 'kB'
|
|
size = size / kb
|
|
if size >= kb:
|
|
unit = 'MB'
|
|
size = size / kb
|
|
size = round(size, 1)
|
|
return '%.1f %s' % (size, unit)
|
|
#return '%s %s' % (util.getNiceNumber(size), unit)
|
|
|
|
# storage migration
|
|
|
|
def migrateStorage(self, oldType, newType):
|
|
oldType = removeSecurityProxy(oldType)
|
|
newType = removeSecurityProxy(newType)
|
|
context = removeSecurityProxy(self)
|
|
oldAdapted = newAdapted = context
|
|
oldTi = removeSecurityProxy(oldType.typeInterface)
|
|
if oldTi is not None:
|
|
oldAdapted = oldTi(context, None)
|
|
if oldAdapted is None: # nothing to migrate
|
|
return
|
|
newTi = removeSecurityProxy(newType.typeInterface)
|
|
newOptions = {}
|
|
if newTi is not None:
|
|
newAdapted = newTi(context, None)
|
|
if newAdapted is not None:
|
|
# make sure we use options of new type:
|
|
newOptions = newType.optionsDict
|
|
object.__setattr__(newAdapted, 'options', newOptions)
|
|
#print 'migrateStorage:', newAdapted, newOptions, oldAdapted, oldAdapted.storageName
|
|
if newAdapted is not None and newOptions.get('storage') != oldAdapted.storageName:
|
|
data = oldAdapted.data
|
|
#print 'data', data
|
|
oldAdapted.data = '' # clear old storage
|
|
context._storageName = None # let's take storage from new type options
|
|
context._storageParams = None # "
|
|
newAdapted.data = data
|
|
|
|
|
|
# Document and MediaAsset are legacy classes, will become obsolete
|
|
|
|
class Document(Resource):
|
|
|
|
implements(IDocument)
|
|
|
|
proxyInterface = IDocumentView
|
|
|
|
def __init__(self, title=u''):
|
|
self.title = title
|
|
|
|
_data = u''
|
|
def setData(self, data):
|
|
self._data = data.replace('\r', '')
|
|
self._size = len(data)
|
|
def getData(self): return self._data
|
|
data = property(getData, setData)
|
|
|
|
|
|
class MediaAsset(Resource):
|
|
|
|
implements(IMediaAsset)
|
|
|
|
|
|
# type adapters
|
|
|
|
class FileAdapter(ResourceAdapterBase):
|
|
""" A type adapter for providing file functionality for resources.
|
|
"""
|
|
|
|
implements(IFile)
|
|
|
|
_contextAttributes = list(IFile) + list(IBaseResource)
|
|
_adapterAttributes = ResourceAdapterBase._adapterAttributes + ('data',)
|
|
|
|
externalAddress = None
|
|
|
|
def setData(self, data):
|
|
#if self.storageName is None:
|
|
# self.storageName = 'zopefile'
|
|
self.storageName = None
|
|
self.context.data = data
|
|
def getData(self): return self.context.data
|
|
data = property(getData, setData)
|
|
|
|
@Lazy
|
|
def options(self):
|
|
return IType(self.context).optionsDict
|
|
|
|
def getStorageName(self):
|
|
return (getattr(self.context, '_storageName', None)
|
|
or self.options.get('storage', None))
|
|
def setStorageName(self, value):
|
|
self.context._storageName = value
|
|
storageName = property(getStorageName, setStorageName)
|
|
|
|
|
|
class ExternalFileAdapter(FileAdapter):
|
|
|
|
implements(IExternalFile)
|
|
|
|
_adapterAttributes = (FileAdapter._adapterAttributes
|
|
+ ('storageParams', 'externalAddress', 'uniqueAddress'))
|
|
|
|
def getStorageParams(self):
|
|
params = getattr(self.context, '_storageParams', None)
|
|
if params is not None:
|
|
return params
|
|
else:
|
|
value = self.options.get('storage_parameters') or 'extfiles'
|
|
return dict(subdirectory=value)
|
|
def setStorageParams(self, value):
|
|
self.context._storageParams = value
|
|
storageParams = property(getStorageParams, setStorageParams)
|
|
|
|
def getExternalAddress(self):
|
|
return getattr(self.context, '_externalAddress', self.context.__name__)
|
|
def setExternalAddress(self, addr):
|
|
# TODO (?) - use intId as default?
|
|
self.context._externalAddress = addr
|
|
externalAddress = property(getExternalAddress, setExternalAddress)
|
|
|
|
@property
|
|
def uniqueAddress(self):
|
|
storageParams = self.storageParams
|
|
storageName = self.storageName
|
|
storage = component.getUtility(IExternalStorage, name=storageName)
|
|
return storage.getUniqueAddress(self.externalAddress, storageParams)
|
|
|
|
def setData(self, data):
|
|
storageParams = self.storageParams
|
|
storageName = self.storageName
|
|
storage = component.getUtility(IExternalStorage, name=storageName)
|
|
storage.setData(self.externalAddress, data, params=storageParams)
|
|
self.context._size = len(data)
|
|
# remember storage settings:
|
|
self.storageParams = storageParams
|
|
self.storageName = storageName
|
|
|
|
def getData(self):
|
|
storage = component.getUtility(IExternalStorage, name=self.storageName)
|
|
return storage.getData(self.externalAddress, params=self.storageParams)
|
|
|
|
data = property(getData, setData)
|
|
|
|
|
|
class DocumentAdapter(ResourceAdapterBase):
|
|
""" Common base class for all resource types with a text-like
|
|
data attribute.
|
|
"""
|
|
|
|
# let the adapter handle the data attribute:
|
|
_adapterAttributes = ResourceAdapterBase._adapterAttributes + ('data',)
|
|
|
|
def setData(self, data):
|
|
self.context._data = data.replace('\r', '')
|
|
self.context._size = len(data)
|
|
def getData(self): return self.context._data
|
|
data = property(getData, setData)
|
|
|
|
|
|
class TextDocumentAdapter(DocumentAdapter):
|
|
""" A type adapter for providing text document functionality for resources.
|
|
"""
|
|
|
|
implements(IDocument)
|
|
_contextAttributes = list(IDocument) + list(IBaseResource)
|
|
|
|
|
|
class NoteAdapter(DocumentAdapter):
|
|
""" A note is a short text document with an associated link.
|
|
"""
|
|
|
|
implements(INote)
|
|
_contextAttributes = list(INote) + list(IBaseResource)
|
|
|
|
@property
|
|
def description(self):
|
|
return self.data.replace('\n', ' ')
|
|
|
|
|
|
# other adapters
|
|
|
|
class DocumentWriteFileAdapter(object):
|
|
|
|
implements(IWriteFile)
|
|
adapts(IResource)
|
|
|
|
def __init__(self, context):
|
|
self.context = context
|
|
|
|
def write(self, data):
|
|
# TODO: use typeInterface...
|
|
ti = IType(self.context).typeInterface
|
|
context = ti is None and self.context or ti(self.context)
|
|
if ITextDocument.providedBy(context) or IDocument.providedBy(context):
|
|
context.data = unicode(data.replace('\r', ''), 'UTF-8')
|
|
else:
|
|
# TODO: make use of tmpfile when using external files
|
|
context.data = data
|
|
#ITextDocument(self.context).data = unicode(data.replace('\r', ''), 'UTF-8')
|
|
notify(ObjectModifiedEvent(self.context, Attributes(IResource, 'data')))
|
|
|
|
|
|
class DocumentReadFileAdapter(object):
|
|
|
|
implements(IReadFile)
|
|
adapts(IResource)
|
|
|
|
def __init__(self, context):
|
|
self.context = context
|
|
|
|
def read(self):
|
|
return self.context.data.encode('UTF-8')
|
|
|
|
def size(self):
|
|
return len(self.context.data)
|
|
|
|
|
|
class IndexAttributes(object):
|
|
|
|
implements(IIndexAttributes)
|
|
adapts(IResource)
|
|
|
|
def __init__(self, context):
|
|
self.context = context
|
|
|
|
def text(self):
|
|
context = self.context
|
|
ti = IType(context).typeInterface
|
|
if ti is not None:
|
|
adapted = ti(context)
|
|
transform = component.queryAdapter(adapted, ITextTransform,
|
|
name=context.contentType)
|
|
if transform is not None:
|
|
rfa = component.queryAdapter(IReadFile, adapted)
|
|
if rfa is None:
|
|
data = transform(StringIO(adapted.data))
|
|
return data
|
|
else:
|
|
return transform(rfa)
|
|
if not context.contentType.startswith('text'):
|
|
return u''
|
|
data = context.data
|
|
if type(data) != unicode:
|
|
data = data.decode('UTF-8')
|
|
return data
|
|
|
|
def title(self):
|
|
context = self.context
|
|
return ' '.join([getName(context),
|
|
context.title, context.description] +
|
|
self.creators()).strip()
|
|
|
|
def creators(self):
|
|
cr = IZopeDublinCore(self.context).creators or []
|
|
pau = component.getUtility(IAuthentication)
|
|
creators = []
|
|
for c in cr:
|
|
principal = pau.getPrincipal(c)
|
|
if principal is not None:
|
|
creators.append(principal.title)
|
|
return creators
|
|
|
|
|
|
class ResourceTypeSourceList(object):
|
|
|
|
implements(schema.interfaces.IIterableSource)
|
|
|
|
def __init__(self, context):
|
|
self.context = context
|
|
|
|
def __iter__(self):
|
|
return iter(self.resourceTypes)
|
|
|
|
@Lazy
|
|
def resourceTypes(self):
|
|
types = ITypeManager(self.context).listTypes(include=('resource',))
|
|
return [t.typeProvider for t in types if t.typeProvider is not None]
|
|
|
|
def __len__(self):
|
|
return len(self.resourceTypes)
|
|
|
|
|