from zope.app.component.metaconfigure import utility
from pipelines.interfaces import IPipeline
from pipelines.pipeline import Pipeline

class pipeline(object):
    def __init__(self, _context, package, name):
        self.package = package
        self.name = name
        self.filters = []

    def filter(self, _context, id, factory=None, component=None):
        self.filters.append(filter(_context, id, component, factory))

    def __call__(self):
        pipe = Pipeline(self.filters)
        pipe.__dict__['__name__'] = self.name
        setattr(self.package, self.name, pipe)
        # setattr(self.package, pipe.getName(), pipe)
        # self.package[self.name] = pipe

def filter(_context, id, component=None, factory=None):
    if factory:
        if component:
            raise TypeError("Can't specify factory and component.")
        component = factory()
    return component