from zope.interface import Interface
from zope.configuration.fields import GlobalObject, PythonIdentifier
from zope.schema import Id, TextLine
from zope.app.i18n import ZopeMessageIDFactory as _

class IPipelineDirective(Interface):
    package = GlobalObject(
        title=_("Package where the Pipeline will live in"),
        description=_("Python name of the package to which the pipeline"
                      "will be added. This must identify a module using the"
                      " full dotted name."),
        required=True,
        )

    name = PythonIdentifier(
        title=_("The name of the pipeline."),
        description=_("The name pipeline within the package."),
        required=True,
        )

class IFilterSubdirective(Interface):
    id = TextLine(
        title=_("ID"),
        required=False,
        )
    component = GlobalObject(
        title=_("Component to use"),
        description=_("Python name of the implementation object.  This"
                      " must identify an object in a module using the"
                      " full dotted name.  If specified, the"
                      " ``factory`` field must be left blank."),
        required=False,
        )
    
    factory = GlobalObject(
        title=_("Factory"),
        description=_("Python name of a factory which can create the"
                      " implementation object.  This must identify an"
                      " object in a module using the full dotted name."
                      " If specified, the ``component`` field must"
                      " be left blank."),
        required=False,
        )