def counter_offer(offer):
logger.info('Asking counter-offer to ' + offer.address)
gr = Graph()
subject = ECSDI['contra-oferta']
gr.add((subject, RDF.type, ECSDI.Contraoferta))
new_price = offer.price - 2
gr.add((subject, ECSDI.Precio_envio, Literal(new_price)))
resp = send_message(build_message(gr, ACL['counter-proposal'], content=subject, sender=AgenteNegociador.uri),
offer.address)
msg = get_message_properties(resp)
if 'performative' not in msg or msg['performative'] == ACL.refuse:
logger.warn('An agent rejected us :(')
return None
elif msg['performative'] == ACL.agree:
return Offer(address=offer.address, price=new_price)
else:
logger.error('I can\'t understand:(')
return None
def requestOffer(agent, peso, fecha, destino):
gr = Graph()
subject = ECSDI['peticion-oferta']
gr.add((subject, RDF.type, ECSDI.Pedir_oferta_transporte))
gr.add((subject, ECSDI.Destino, Literal(destino)))
gr.add((subject, ECSDI.Plazo_maximo_entrega, Literal(fecha)))
gr.add((subject, ECSDI.Peso_envio, Literal(peso)))
resp = send_message(build_message(gr, ACL['call-for-proposal'], content=subject, receiver=agent.uri,
sender=AgenteNegociador.uri), agent.address)
msg = get_message_properties(resp)
if 'performative' not in msg or msg['performative'] == ACL.refuse:
logger.warn('Nos ha rechazado un agente')
return None
elif msg['performative'] == ACL.propose:
precio = resp.value(msg['content'], ECSDI.Precio_envio)
return Offer(address=agent.address, price=precio.toPython())
logger.error('No se entiende')
return None