## Script (Python) "metadata_edit"
##parameters=allowDiscussion=None, title=None, subject=None, description=None, contributors=None, effective_date=None, expiration_date=None, format=None, language=None, rights=None, change_and_edit='', change_and_view=''
##title=Update Content Metadata
##
from Products.PythonScripts.standard import urlencode
from Products.CMFCore.utils import getToolByName
from Products.CMFDefault.exceptions import ResourceLockedError

dtool = getToolByName(script, 'portal_discussion')

def tuplify( value ):

    if not same_type( value, () ):
        value = tuple( value )

    temp = filter( None, value )
    return tuple( temp )

if title is None:
    title = context.Title()

if subject is None:
    subject = context.Subject()
else:
    subject = tuplify( subject )

if description is None:
    description = context.Description()

if contributors is None:
    contributors = context.Contributors()
else:
    contributors = tuplify( contributors )

if effective_date is None:
    effective_date = context.EffectiveDate()

if expiration_date is None:
    expiration_date = context.expires()

if format is None:
    format = context.Format()

if language is None:
    language = context.Language()

if rights is None:
    rights = context.Rights()

dtool.overrideDiscussionFor(context, allowDiscussion)

try:
    context.editMetadata( title=title
                        , description=description
                        , subject=subject
                        , contributors=contributors
                        , effective_date=effective_date
                        , expiration_date=expiration_date
                        , format=format
                        , language=language
                        , rights=rights
                        )
except ResourceLockedError, msg:
    message = msg
    action_id = 'metadata'
else:
    message = 'Metadata changed.'
    if change_and_edit:
        action_id = 'edit'
    elif change_and_view:
        action_id = 'view'
    else:
        action_id = 'metadata'

target = '%s/%s' % ( context.absolute_url(),
                     context.getTypeInfo().getActionById(action_id) )
query = urlencode( {'portal_status_message': message} )
context.REQUEST.RESPONSE.redirect( '%s?%s' % (target, query) )