from roundup import roundupdb, hyperdb

def reaction(db, cl, nodeid, oldvalues):
    # if nosy not empty, raise ioerror
    if (db.issue.get(nodeid, 'nosy')):
        raise IOError("nosy reaction ioerror")

def audit(db, cl, nodeid, newvalues):
    # if status changed raise ioerror
    if newvalues.has_key('status'):
        raise IOError("status audit ioerror")

def init(db):
    '''Set up reactors for exception handling'''
    db.issue.react('create', reaction)
    db.issue.react('set', reaction)

    db.issue.audit('set', audit)
    db.issue.audit('create', audit)