from Products.Five import BrowserView as BaseView
from zope.interface import implements 
from zope.component import getUtility

from Products.iva.interfaces import IIVAPlugin

from interfaces import IWaramu, IWaramuTool
from WaramuTool import WaramuTool

def _getMyTool(ctx):
    return getattr(ctx, WaramuTool.id, None)

class WaramuManagerAdapter(object):
    """ waramu manager adapter """
    implements(IWaramu, IIVAPlugin)

    def __init__(self, context):
        self.context = context
        self.tool = _getMyTool(self.context)

    def _install(self):
        w = WaramuTool()
        if self.tool is None:
            self.context._setObject(w.id, w)
            sm = self.context.getSiteManager()
            sm.registerUtility(_getMyTool(self.context), IWaramuTool, name='waramutool')

    def _uninstall(self):
        sm = self.context.getSiteManager()
        sm.unregisterUtility(provided=IWaramuTool, name="waramutool")
        self.context._delObject(WaramuTool.id)

    def isInstalled(self):
        return self.tool

    def isVisible(self):
        return self.tool.isVisible()