283 lines
12 KiB
Python
283 lines
12 KiB
Python
'''This package contains base classes for wrappers that hide to the Appy
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developer the real classes used by the underlying web framework.'''
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# ------------------------------------------------------------------------------
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import time, os.path, mimetypes
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from appy.gen.utils import sequenceTypes
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from appy.shared.utils import getOsTempFolder
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# Some error messages ----------------------------------------------------------
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WRONG_FILE_TUPLE = 'This is not the way to set a file. You can specify a ' \
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'2-tuple (fileName, fileContent) or a 3-tuple (fileName, fileContent, ' \
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'mimeType).'
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# ------------------------------------------------------------------------------
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class AbstractWrapper:
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'''Any real web framework object has a companion object that is an instance
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of this class.'''
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def __init__(self, o):
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self.__dict__['o'] = o
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def _set_file_attribute(self, name, v):
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'''Updates the value of a file attribute named p_name with value p_v.
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p_v may be:
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- a string value containing the path to a file on disk;
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- a 2-tuple (fileName, fileContent) where
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* fileName = the name of the file (ie "myFile.odt")
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* fileContent = the binary or textual content of the file or an
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open file handler.
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- a 3-tuple (fileName, fileContent, mimeType) where mimeType is the
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v MIME type of the file.'''
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ploneFileClass = self.o.getProductConfig().File
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if isinstance(v, ploneFileClass):
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exec "self.o.set%s%s(v)" % (name[0].upper(), name[1:])
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elif isinstance(v, FileWrapper):
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setattr(self, name, v._atFile)
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elif isinstance(v, basestring):
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f = file(v)
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fileName = os.path.basename(v)
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fileId = 'file.%f' % time.time()
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ploneFile = ploneFileClass(fileId, fileName, f)
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ploneFile.filename = fileName
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ploneFile.content_type = mimetypes.guess_type(fileName)[0]
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setattr(self, name, ploneFile)
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f.close()
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elif type(v) in sequenceTypes:
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# It should be a 2-tuple or 3-tuple
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fileName = None
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mimeType = None
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if len(v) == 2:
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fileName, fileContent = v
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elif len(v) == 3:
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fileName, fileContent, mimeType = v
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else:
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raise WRONG_FILE_TUPLE
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if fileName:
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fileId = 'file.%f' % time.time()
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ploneFile = ploneFileClass(fileId, fileName, fileContent)
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ploneFile.filename = fileName
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if not mimeType:
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mimeType = mimetypes.guess_type(fileName)[0]
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ploneFile.content_type = mimeType
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setattr(self, name, ploneFile)
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def __setattr__(self, name, v):
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appyType = self.o.getAppyType(name)
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if not appyType and (name != 'title'):
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raise 'Attribute "%s" does not exist.' % name
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if appyType and (appyType['type'] == 'File'):
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self._set_file_attribute(name, v)
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else:
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exec "self.o.set%s%s(v)" % (name[0].upper(), name[1:])
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def __cmp__(self, other):
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if other: return cmp(self.o, other.o)
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else: return 1
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def get_tool(self): return self.o.getTool().appy()
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tool = property(get_tool)
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def get_flavour(self): return self.o.getTool().getFlavour(self.o, appy=True)
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flavour = property(get_flavour)
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def get_session(self): return self.o.REQUEST.SESSION
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session = property(get_session)
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def get_typeName(self): return self.__class__.__bases__[-1].__name__
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typeName = property(get_typeName)
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def get_id(self): return self.o.id
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id = property(get_id)
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def get_state(self):
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return self.o.portal_workflow.getInfoFor(self.o, 'review_state')
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state = property(get_state)
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def get_stateLabel(self):
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appName = self.o.getProductConfig().PROJECTNAME
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return self.o.utranslate(self.o.getWorkflowLabel(), domain=appName)
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stateLabel = property(get_stateLabel)
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def get_klass(self): return self.__class__.__bases__[1]
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klass = property(get_klass)
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def link(self, fieldName, obj):
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'''This method links p_obj to this one through reference field
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p_fieldName.'''
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if isinstance(obj, AbstractWrapper):
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obj = obj.o
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postfix = 'et%s%s' % (fieldName[0].upper(), fieldName[1:])
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# Update the Archetypes reference field
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exec 'objs = self.o.g%s()' % postfix
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if not objs:
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objs = []
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elif type(objs) not in (list, tuple):
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objs = [objs]
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objs.append(obj)
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exec 'self.o.s%s(objs)' % postfix
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# Update the ordered list of references
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sortedRefField = '_appy_%s' % fieldName
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if not hasattr(self.o.aq_base, sortedRefField):
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exec 'self.o.%s = self.o.getProductConfig().PersistentList()' % \
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sortedRefField
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getattr(self.o, sortedRefField).append(obj.UID())
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def sort(self, fieldName):
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'''Sorts referred elements linked to p_self via p_fieldName. At
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present, it can only sort elements based on their title.'''
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sortedUids = getattr(self.o, '_appy_%s' % fieldName)
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c = self.o.uid_catalog
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sortedUids.sort(lambda x,y: \
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cmp(c(UID=x)[0].getObject().Title(),c(UID=y)[0].getObject().Title()))
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def create(self, fieldNameOrClass, **kwargs):
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'''If p_fieldNameOfClass is the name of a field, this method allows to
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create an object and link it to the current one (self) through
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reference field named p_fieldName.
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If p_fieldNameOrClass is a class from the gen-application, it must
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correspond to a root class and this method allows to create a
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root object in the application folder.'''
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isField = isinstance(fieldNameOrClass, basestring)
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# Determine the portal type of the object to create
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if isField:
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fieldName = fieldNameOrClass
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idPrefix = fieldName
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portalType = self.o.getAppyRefPortalType(fieldName)
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else:
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theClass = fieldNameOrClass
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idPrefix = theClass.__name__
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portalType = self.o._appy_getAtType(theClass, self.flavour.o)
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# Determine object id
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if kwargs.has_key('id'):
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objId = kwargs['id']
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del kwargs['id']
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else:
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objId = '%s.%f' % (idPrefix, time.time())
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# Determine if object must be created from external data
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externalData = None
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if kwargs.has_key('_data'):
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externalData = kwargs['_data']
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del kwargs['_data']
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# Where must I create the object?
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if not isField:
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folder = self.o.getTool().getAppFolder()
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else:
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if hasattr(self, 'folder') and self.folder:
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folder = self.o
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else:
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folder = self.o.getParentNode()
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# Create the object
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folder.invokeFactory(portalType, objId)
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ploneObj = getattr(folder, objId)
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appyObj = ploneObj._appy_getWrapper(force=True)
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# Set object attributes
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ploneObj._appy_manageSortedRefs()
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for attrName, attrValue in kwargs.iteritems():
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setterName = 'set%s%s' % (attrName[0].upper(), attrName[1:])
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if isinstance(attrValue, AbstractWrapper):
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try:
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refAppyType = getattr(appyObj.__class__.__bases__[-1],
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attrName)
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appyObj.link(attrName, attrValue.o)
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except AttributeError, ae:
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pass
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else:
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getattr(ploneObj, setterName)(attrValue)
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if isField:
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# Link the object to this one
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self.link(fieldName, ploneObj)
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self.o.reindexObject()
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# Call custom initialization
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try:
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if externalData: param = externalData
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else: param = True
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appyObj.onEdit(param)
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except AttributeError:
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pass
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ploneObj.reindexObject()
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return appyObj
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def translate(self, label, mapping={}, domain=None):
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'''Check documentation of self.o.translate.'''
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return self.o.translate(label, mapping, domain)
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def do(self, transition, comment='', doAction=False, doNotify=False):
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'''This method allows to trigger on p_self a workflow p_transition
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programmatically. If p_doAction is False, the action that must
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normally be executed after the transition has been triggered will
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not be executed. If p_doNotify is False, the notifications
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(email,...) that must normally be launched after the transition has
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been triggered will not be launched.'''
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wfTool = self.o.portal_workflow
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availableTransitions = [t['id'] for t in \
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wfTool.getTransitionsFor(self.o)]
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transitionName = transition
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if not transitionName in availableTransitions:
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# Maybe is is a compound Appy transition. Try to find the
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# corresponding DC transition.
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state = self.state
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transitionPrefix = transition + state[0].upper() + state[1:] + 'To'
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for at in availableTransitions:
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if at.startswith(transitionPrefix):
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transitionName = at
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break
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# Set in a versatile attribute details about what to execute or not
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# (actions, notifications) after the transition has been executed by DC
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# workflow.
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self.o._v_appy_do = {'doAction': doAction, 'doNotify': doNotify}
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wfTool.doActionFor(self.o, transitionName, comment=comment)
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del self.o._v_appy_do
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def log(self, message, logLevel='info'):
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'''Logs a message in the log file. p_logLevel may be "info", "warning"
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or "error".'''
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logger = self.o.getProductConfig().logger
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if logLevel == 'warning': logMethod = logger.warn
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elif logLevel == 'error': logMethod = logger.error
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else: logMethod = logger.info
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logMethod(message)
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# ------------------------------------------------------------------------------
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class FileWrapper:
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'''When you get, from an appy object, the value of a File attribute, you
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get an instance of this class.'''
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def __init__(self, atFile):
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'''This constructor is only used by Appy to create a nice File instance
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from a Plone/Zope corresponding instance (p_atFile). If you need to
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create a new file and assign it to a File attribute, use the
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attribute setter, do not create yourself an instance of this
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class.'''
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d = self.__dict__
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d['_atFile'] = atFile # Not for you!
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d['name'] = atFile.filename
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d['content'] = atFile.data
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d['mimeType'] = atFile.content_type
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d['size'] = atFile.size # In bytes
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def __setattr__(self, name, v):
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d = self.__dict__
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if name == 'name':
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self._atFile.filename = v
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d['name'] = v
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elif name == 'content':
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self._atFile.update_data(v, self.mimeType, len(v))
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d['content'] = v
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d['size'] = len(v)
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elif name == 'mimeType':
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self._atFile.content_type = self.mimeType = v
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else:
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raise 'Impossible to set attribute %s. "Settable" attributes ' \
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'are "name", "content" and "mimeType".' % name
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def dump(self, filePath=None):
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'''Writes the file on disk. If p_filePath is specified, it is the
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path name where the file will be dumped; folders mentioned in it
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must exist. If not, the file will be dumped in the OS temp folder.
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The absolute path name of the dumped file is returned.'''
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if not filePath:
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filePath = '%s/file%f.%s' % (getOsTempFolder(), time.time(),
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self.name)
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f = file(filePath, 'w')
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if self.content.__class__.__name__ == 'Pdata':
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# The file content is splitted in several chunks.
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f.write(self.content.data)
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nextPart = self.content.next
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while nextPart:
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f.write(nextPart.data)
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nextPart = nextPart.next
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else:
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# Only one chunk
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f.write(self.content)
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f.close()
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return filePath
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# ------------------------------------------------------------------------------
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