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36 package gr.grnet.aquarium.charging.state
38 import scala.collection.immutable
39 import gr.grnet.aquarium.logic.accounting.dsl.Timeslot
40 import gr.grnet.aquarium.policy.UserAgreementModel
43 * The whole history of of a user's agreements.
45 * @author Christos KK Loverdos <loverdos@gmail.com>
48 case class AgreementHistory(agreements: List[UserAgreementModel]) extends AgreementHistoryModel {
49 def toWorkingAgreementHistory = {
50 (new WorkingAgreementHistory) ++ agreements
53 def agreementByTimeslot: immutable.SortedMap[Timeslot, UserAgreementModel] = {
54 immutable.TreeMap(agreements.map(ag ⇒ (ag.timeslot, ag)): _*)
58 * Returns the first, chronologically, agreement.
60 def firstAgreement: Option[UserAgreementModel] = {
61 agreementByTimeslot.valuesIterator.toList.lastOption
65 * Returns the last, chronologically, agreement.
67 def lastAgreement: Option[UserAgreementModel] = {
68 agreementByTimeslot.valuesIterator.toList.headOption
72 object AgreementHistory {
73 final val Empty = AgreementHistory(Nil)
75 def initial(userAgreement: UserAgreementModel): AgreementHistory = {
76 AgreementHistory(userAgreement :: Nil)