from enigma import eServiceCenter, iServiceInformation
RETURN_NONE = "0"
RETURN_DESCR = "1"
RETURN_EXTDESCR = "2"

def GetDescriptionWithFallbackFromService(service):
    serviceHandler = eServiceCenter.getInstance()
    info = serviceHandler.info(service)
    event = info.getEvent(service)
    descr = info.getInfoString(service, iServiceInformation.sDescription)
    eventData = GetDescriptionWithFallbackFromEvent(event,descr)
    descr = eventData[0]
    descrType = eventData[1]
    return (descr, descrType)

def GetDescriptionWithFallbackFromEvent(event,descr):
    if event == None:
        descrType = RETURN_NONE
    else:    
        descrType = RETURN_DESCR
        if descr == "":
            descr = event.getShortDescription()
        extDescr = event.getExtendedDescription()
        if descr == "" and extDescr != "":
            descrType = RETURN_EXTDESCR
            if extDescr.find("'") > -1:
                extArr = extDescr.split("'",3)
                descr = extArr[1]
            elif extDescr.find('"') > -1:
                extArr = extDescr.split('"',3)
                descr = extArr[1]
            elif extDescr.find(':') > -1:
                extArr = extDescr.split(':',3)
                descr = extArr[0]
            elif extDescr.find('.') > -1:
                extArr = extDescr.split('.',3)
                descr = extArr[0]
            else:
                descr = extDescr[:20]
    return (descr, descrType)