module org-openroadm-network-topology {

    yang-version 1.1;

    namespace
      "http://org/openroadm/network/topology";

    prefix topo;

    import ietf-network {
      prefix nd;
      revision-date "2018-02-26";
    }
    import ietf-network-topology {
      prefix nwt;
      revision-date "2018-02-26";
    }
    import org-openroadm-network-types {
      prefix org-openroadm-network-types;
      revision-date "2024-05-31";
    }
    import org-openroadm-srg {
      prefix srg;
      revision-date "2023-05-26";
    }
    import org-openroadm-degree {
      prefix dgr;
      revision-date "2024-05-31";
    }
    import org-openroadm-xponder {
      prefix xpdr;
      revision-date "2024-05-31";
    }
    import org-openroadm-external-pluggable {
      prefix plg;
      revision-date "2023-05-26";
    }
    import org-openroadm-link {
      prefix link;
      revision-date "2024-05-31";
    }
    import org-openroadm-common-network {
      prefix cnet;
      revision-date "2024-05-31";
    }

    organization "OPEN ROADM MSA";

    contact "OpenROADM.org.";

    description
      "YANG definitions for network view of a ROADM

     Copyright of the Members of the Open ROADM MSA Agreement dated (c) 2016,
     All other rights reserved.

     Redistribution and use in source and binary forms, with or without modification,
     are permitted provided that the following conditions are met:

     * Redistributions of source code must retain the above copyright notice, this
       list of conditions and the following disclaimer.
     * Redistributions in binary form must reproduce the above copyright notice,
       this list of conditions and the following disclaimer in the documentation and/or
       other materials provided with the distribution.
     * Neither the Members of the Open ROADM MSA Agreement nor the names of its
       contributors may be used to endorse or promote products derived from this software
       without specific prior written permission.

     THIS SOFTWARE IS PROVIDED BY THE MEMBERS OF THE OPEN ROADM MSA  AGREEMENT ''AS IS''
     AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     IN NO EVENT THE MEMBERS OF THE OPEN ROADM MSA  AGREEMENT BE LIABLE FOR ANY DIRECT,
     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;  LOSS OF USE, DATA,
     OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     POSSIBILITY OF SUCH DAMAGE.";

    revision "2024-05-31" {
      description "Version 15.1";
    }

    revision "2024-03-29" {
      description "Version 15.0";
    }

    revision "2023-12-08" {
      description "Version 14.1";
    }

    revision "2023-09-29" {
      description "Version 14.0";
    }

    revision "2023-05-26" {
      description "Version 13.1";
    }

    revision "2023-03-31" {
      description "Version 13.0";
    }

    revision "2022-12-09" {
      description "Version 12.1";
    }

    revision "2022-09-30" {
      description "Version 12.0";
    }

    revision "2022-05-27" {
      description "Version 11.1";
    }

    revision "2022-03-25" {
      description "Version 11.0";
    }

    revision "2021-12-10" {
      description "Version 10.1";
    }

    revision "2021-09-24" {
      description "Version 10.0";
    }

    revision "2021-05-28" {
      description "Version 9.1";
    }

    revision "2021-03-26" {
      description "Version 9.0";
    }

    revision "2020-12-11" {
      description "Version 8.1";
    }

    revision "2020-05-29" {
      description "Version 7.1.0";
    }

    revision "2020-03-27" {
      description "Version 7.0.0";
    }

    revision "2019-11-29" {
      description "Version 6.1.0";
    }

    revision "2019-09-27" {
      description "Version 6.0.0";
    }

    revision "2019-05-31" {
      description "Version 5.1.0";
    }

    revision "2019-03-29" {
      description "Version 5.0.0";
    }

    revision "2018-11-30" {
      description "Version 4.1.0";
    }

    revision "2018-09-28" {
      description "Version 4.0.0";
    }

    revision "2018-05-30" {
      description "Version 3.1.0";
    }

    revision "2018-03-30" {
      description "Version 3.0.0";
    }

    revision "2017-12-15" {
      description "Version 2.2";
    }

    revision "2017-09-29" {
      description "Version 2.1";
    }

    revision "2017-07-28" {
      description
        "Version 2.0.1 - added revision-date to imports";
    }

    revision "2017-06-26" {
      description "Version 2.0";
    }

    deviation /nd:networks/nd:network/nd:node/cnet:node-type {
      deviate add {
        must
          "(not /nd:networks/nd:network/nd:network-types/cnet:openroadm-common-network/openroadm-topology) or
            (/nd:network/nd:network-types/cnet:openroadm-common-network/openroadm-topology and
            (../cnet:node-type = 'DEGREE' or ../cnet:node-type = 'SRG' or ../cnet:node-type = 'TPDR' or ../cnet:node-type = 'SWITCH' or
             ../cnet:node-type = 'REGEN' or ../cnet:node-type = 'REGEN-UNI' or ../cnet:node-type = 'EXT-PLUGGABLE' or
             ../cnet:node-type = 'MUXPDR'))" {
          error-message
            "Invalid node type for openroadm-topology";
          description
            "The valid node types in the ROADM topology are 'SRG', 'DEGREE',
           'TPDR', 'SWITCH', 'REGEN', 'REGEN-UNI', 'EXT-PLUGGABLE' and 'MUXPDR'";
        }
      }
    }
    deviation /nd:networks/nd:network/nd:node/nwt:termination-point/cnet:tp-type {
      description
        "Defines which TP types can be instantiated on which Node types";
      deviate add {
        must
          "/nd:network/nd:node/cnet:node-type != 'DEGREE' or (../../cnet:node-type = 'DEGREE'  and
            (../cnet:tp-type = 'DEGREE-TX-TTP' or ../cnet:tp-type = 'DEGREE-RX-TTP' or  ../cnet:tp-type = 'DEGREE-TXRX-TTP' or
            ../cnet:tp-type = 'DEGREE-TX-CTP' or ../cnet:tp-type = 'DEGREE-RX-CTP' or ../cnet:tp-type = 'DEGREE-TXRX-CTP'))" {
          error-message
            "Invalid TP for node type 'DEGREE'";
        }
        must
          "/nd:network/nd:node/cnet:node-type != 'SRG' or (../../cnet:node-type = 'SRG' and
            (../cnet:tp-type = 'SRG-TX-CP' or ../cnet:tp-type = 'SRG-RX-CP' or ../cnet:tp-type = 'SRG-TXRX-CP' or
            ../cnet:tp-type = 'SRG-RX-PP' or ../cnet:tp-type = 'SRG-TX-PP' or ../cnet:tp-type = 'SRG-TXRX-PP'))" {
          error-message
            "Invalid TP for node type 'SRG'";
        }
        must
          " (/nd:network/nd:node/cnet:node-type != 'TPDR' and ../../cnet:node-type != 'MUXPDR' and ../../cnet:node-type != 'REGEN' and
            ../../cnet:node-type != 'REGEN-UNI' and ../../cnet:node-type != 'SWITCH')
            or ((../../cnet:node-type = 'TPDR' or ../../cnet:node-type = 'MUXPDR' or ../../cnet:node-type = 'REGEN' or
            ../../cnet:node-type = 'REGEN-UNI' or ../../cnet:node-type = 'SWITCH') and
            (../cnet:tp-type = 'XPONDER-NETWORK' or ../cnet:tp-type = 'XPONDER-CLIENT' or ../cnet:tp-type = 'XPONDER-PORT'))" {
          error-message
            "Invalid TP for node type 'XPONDER'";
        }
        must
          "/nd:network/nd:node/cnet:node-type != 'EXT-PLUGGABLE' or (../../cnet:node-type = 'EXT-PLUGGABLE' and ../cnet:tp-type = 'EXT-PLUGGABLE-TP')" {
          error-message
            "Invalid TP for node type 'EXT-PLUGGABLE'";
        }
      }
    }
    deviation /nd:networks/nd:network/nwt:link/cnet:link-type {
      deviate add {
        must
          "(not /nd:network/nd:network-types/cnet:openroadm-common-network/openroadm-topology) or
            (/nd:network/nd:network-types/cnet:openroadm-common-network/openroadm-topology and
            (../cnet:link-type = 'ROADM-TO-ROADM' or ../cnet:link-type = 'ADD-LINK' or ../cnet:link-type = 'DROP-LINK' or
             ../cnet:link-type = 'EXPRESS-LINK' or ../cnet:link-type = 'XPONDER-INPUT' or ../cnet:link-type = 'XPONDER-OUTPUT' or
             ../cnet:link-type = 'REGEN-INPUT' or ../cnet:link-type = 'REGEN-OUTPUT' or ../cnet:link-type = 'TURNBACK-LINK'))" {
          error-message
            "Invalid link type for openroadm-topology";
          description
            "The valid link types in the ROADM topology are 'ROADM-TO-ROADM', 'ADD-LINK',
           'DROP-LINK', 'EXPRESS-LINK', 'XPONDER-INPUT', 'XPONDER-OUTPUT', 'REGEN-INPUT',
           'REGEN-OUTPUT', 'TURNBACK-LINK'";
        }
      }
    }

    augment /nd:networks/nd:network/nd:network-types/cnet:openroadm-common-network {
      description
        "Introduce new network type for the Open ROADM optical
       `     network topology";
      container openroadm-topology {
        presence
          "indicates optical network topology for Open ROADMs";
      }  // container openroadm-topology
    }

    augment /nd:networks/nd:network/nd:node {
      when
        '../nd:network-types/cnet:openroadm-common-network/topo:openroadm-topology';
      description
        "This augmentations adds the ROADM Node type to the generic node
       definition and defines node-specific attributes for each node type
       in the ROADM Topology.";
      container srg-attributes {
        when "../cnet:node-type = 'SRG'";
        description
          "Topology-related attributes for SRG nodes";
        uses srg:srg-node-attributes;

        uses org-openroadm-network-types:available-freq-map;

        uses org-openroadm-network-types:type-variety-grp;
      }  // container srg-attributes

      container degree-attributes {
        when "../cnet:node-type = 'DEGREE'";
        description
          "Topology-related attributes for degree nodes";
        uses dgr:degree-node-attributes;

        uses org-openroadm-network-types:available-freq-map;

        uses org-openroadm-network-types:type-variety-grp;
      }  // container degree-attributes

      container xpdr-attributes {
        when
          "../cnet:node-type = 'TPDR' or ../cnet:node-type = 'MUXPDR' or ../cnet:node-type = 'REGEN' or
            ../cnet:node-type = 'REGEN-UNI' or ../cnet:node-type = 'SWITCH'";
        description
          "Topology-related attributes for Xponder nodes";
        uses xpdr:xpdr-topo-node-attributes;
      }  // container xpdr-attributes
    }

    augment /nd:networks/nd:network/nd:node/nwt:termination-point {
      when
        '../../nd:network-types/cnet:openroadm-common-network/topo:openroadm-topology';
      description
        "Defines the type of a termination point in the ROADM topology and
       TP-specific attributes for each termination point type.";
      container tx-ttp-attributes {
        when
          "../cnet:tp-type = 'DEGREE-TX-TTP' or ../cnet:tp-type = 'DEGREE-TXRX-TTP'";
        description
          "There must be only one TP of type DEGREE-TX-TTP in any given
         degree node";
        uses dgr:degree-used-wavelengths;

        uses org-openroadm-network-types:available-freq-map;
      }  // container tx-ttp-attributes

      container rx-ttp-attributes {
        when
          "../cnet:tp-type = 'DEGREE-RX-TTP'";
        description
          "There must be only one TP of type DEGREE-RX-TTP in any given
         degree node";
        uses dgr:degree-used-wavelengths;

        uses org-openroadm-network-types:available-freq-map;
      }  // container rx-ttp-attributes

      container ctp-attributes {
        when
          "../cnet:tp-type = 'DEGREE-TX-CTP' or ../cnet:tp-type = 'DEGREE-RX-CTP' or ../cnet:tp-type = 'DEGREE-TXRX-CTP'";
        uses org-openroadm-network-types:available-freq-map;
      }  // container ctp-attributes

      container cp-attributes {
        when
          "../cnet:tp-type = 'SRG-TX-CP' or ../cnet:tp-type = 'SRG-RX-CP' or ../cnet:tp-type = 'SRG-TXRX-CP'";
        description
          "This list is created to accommodate fixed grid (1.2.1) as well as flex grid (2.0 above). In case of fixed grid
         index number will refer to one of the 96 WL defined in the wavelength map file. In case of flex grid this
         will hold list of used spectra";
        uses org-openroadm-network-types:available-freq-map;
      }  // container cp-attributes

      container pp-attributes {
        when
          "../cnet:tp-type = 'SRG-TXRX-PP' or ../cnet:tp-type = 'SRG-TX-PP' or ../cnet:tp-type = 'SRG-RX-PP' ";
        description
          "This list is created to accommodate fixed grid (1.2.1) as well as flex grid (2.0 above). In case of fixed grid
         index number will refer to one of the 96 WL defined in the wavelength map file. In case of flex grid this
         will hold list of used spectra";
        list used-wavelength {
          key "index";
          uses org-openroadm-network-types:wavelengths;
        }  // list used-wavelength

        uses org-openroadm-network-types:available-freq-map;
      }  // container pp-attributes

      container xpdr-client-attributes {
        when
          "../../cnet:node-type = 'TPDR' and ../cnet:tp-type = 'XPONDER-CLIENT'";
        description
          "Topology layer will allow client TPs only for Transponder nodes";
        uses xpdr:xpdr-connection-attributes;

        uses xpdr:xpdr-port-connection-attributes;

        uses xpdr:supported-client-services;
      }  // container xpdr-client-attributes

      container xpdr-network-attributes {
        when
          "../cnet:tp-type = 'XPONDER-NETWORK'";
        uses xpdr:xpdr-connection-attributes;

        leaf recolor {
          type boolean;
          description
            "Indication if the recolor is supported or not";
        }

        uses xpdr:xpdr-port-connection-attributes;

        uses xpdr:xpdr-mode-attributes;

        uses org-openroadm-network-types:type-variety-grp;
      }  // container xpdr-network-attributes

      container xpdr-port-attributes {
        when
          "../cnet:tp-type = 'XPONDER-PORT'";
        uses xpdr:xpdr-connection-attributes;

        uses xpdr:xpdr-port-connection-attributes;

        uses xpdr:xpdr-mode-attributes;

        uses org-openroadm-network-types:type-variety-grp;
      }  // container xpdr-port-attributes

      container ext-pluggable-attributes {
        when
          "../cnet:tp-type = 'EXT-PLUGGABLE-TP'";
        uses plg:pluggable-tp-attributes;

        uses xpdr:xpdr-port-connection-attributes;

        uses xpdr:xpdr-mode-attributes;

        uses org-openroadm-network-types:type-variety-grp;
      }  // container ext-pluggable-attributes
    }

    augment /nd:networks/nd:network/nwt:link {
      when
        '../nd:network-types/cnet:openroadm-common-network/topo:openroadm-topology';
      description
        "This augmentation defines ROADM link types in the ROADM topology";
      leaf amplified {
        when
          "../cnet:link-type = 'ROADM-TO-ROADM'";
        type boolean;
        description
          "defines whether an ROADM-TO-ROADM Link includes line amplifiers or not";
      }

      container OMS-attributes {
        when
          "../cnet:link-type = 'ROADM-TO-ROADM'";
        description "";
        container span {
          when "../../amplified = 'false'";
          description "";
          uses link:span-attributes;
        }  // container span

        container amplified-link {
          when "../../amplified = 'true'";
          description
            "when amplified is set to true, rather than a simple OMS section
           we have an amplified link";
          uses link:amplified-link-attributes;
        }  // container amplified-link
      }  // container OMS-attributes
    }
  }  // module org-openroadm-network-topology