module o-ran-fm {
  yang-version 1.1;
  namespace "urn:o-ran:fm:1.0";
  prefix o-ran-fm;

  import ietf-yang-types {
    prefix yang;
    revision-date 2013-07-15;
  }

  organization
    "O-RAN Alliance";
  contact
    "www.o-ran.org";
  description
    "This module defines alarm reporting mechanism.

     Copyright 2019 the O-RAN Alliance.

     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS '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 SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.

     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 above disclaimer.
     * Redistributions in binary form must reproduce the above copyright notice,
     this list of conditions and the above disclaimer in the documentation
     and/or other materials provided with the distribution.
     * Neither the Members of the O-RAN Alliance nor the names of its
     contributors may be used to endorse or promote products derived from
     this software without specific prior written permission.";

  revision 2022-08-15 {
    description
      "version 1.0.0

       1) imported model from xRAN
       2) changed namespace and reference from xran to o-ran";
    reference
      "ORAN-WG4.M.0-v01.00";
  }

  grouping alarm {
    description
      "Gropuping which can uniquely identify alarm";
    leaf fault-id {
      type uint16;
      mandatory true;
      description
        "Fault specific Id that identifies the fault.";
    }

    leaf fault-source {
      type string {
        length "1..255";
      }
      mandatory true;
      description
        "Represents the Object or source that is suspected to be faulty.";
    }

    list affected-objects {
      min-elements 1;
      max-elements 100;
      description
        "List of affected-objects";
      leaf name {
        type string {
          length "1..255";
        }
        mandatory true;
        description
          "Represents the Object or source that is suspected to be affected by this fault";
      }
    }

    leaf fault-severity {
      type enumeration {
        enum "CRITICAL" {
          description
            "Critical alarm means that this device is not able to perform any further service";
        }
        enum "MAJOR" {
          description
            "Major alarm appeared on the device";
        }
        enum "MINOR" {
          description
            "Minor alarm appeared on the device";
        }
        enum "WARNING" {
          description
            "Warning is being reported by the device";
        }
      }
      mandatory true;
      description
        "Fault severity defines the severity level of the fault. A notification, whose fault severity has the value 'warning',
         is a special type of an alarm notification. For these alarm notifications,
         the Master Agent does not expect to receive a clear alarm notification.";
    }

    leaf is-cleared {
      type boolean;
      mandatory true;
      description
        "Fault state determines the type of the event. Not used if faultSeverity is WARNING.";
    }

    leaf fault-text {
      type string {
        length "0..255";
      }
      description
        "Textual description of the fault.";
    }

    leaf event-time {
      type yang:date-and-time;
      mandatory true;
      description
        "Timestamp to indicate the time when the fault is detected/cleared.";
    }
  }

  container active-alarm-list {
    config false;
    description
      "List of currently active alarms. An alarm is removed from this table when the state transitions to clear.";
    list active-alarms {
      description
        "List of currenty active alarms";
      uses alarm;
    }
  }

  notification alarm-notif {
    description
      "Notification sent on initial alarm creation, as well as any time the alarm changes state, including clear";
    uses alarm;
  }
}