<?php

/*
    Copyright (c) 2012, Open Source Solutions Limited, Dublin, Ireland
    All rights reserved.

    Contact: Barry O'Donovan - barry (at) opensolutions (dot) ie
             http://www.opensolutions.ie/

    This file is part of the OSS_SNMP package.

    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 name of Open Source Solutions Limited 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 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 OWNER 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.
*/

namespace OSS_SNMP\MIBS\Cisco;

/**
 * A class for performing SNMP V2 queries on Cisco devices
 *
 * @copyright Copyright (c) 2012, Open Source Solutions Limited, Dublin, Ireland
 * @author Barry O'Donovan <barry@opensolutions.ie>
 */
class RSTP extends \OSS_SNMP\MIBS\Cisco
{


    const OID_STP_X_RSTP_PORT_ROLE     = '.1.3.6.1.4.1.9.9.82.1.12.2.1.3'; // add '.$VID'; integer


    /**
     * Constant for possible value of STP extensions RSTP Port Role
     * @see rstpPortRole()
     */
    const STP_X_RSTP_PORT_ROLE_DISABLED = 1;

    /**
     * Constant for possible value of STP extensions RSTP Port Role
     * @see rstpPortRole()
     */
    const STP_X_RSTP_PORT_ROLE_ROOT = 2;

    /**
     * Constant for possible value of STP extensions RSTP Port Role
     * @see rstpPortRole()
     */
    const STP_X_RSTP_PORT_ROLE_DESIGNATED = 3;

    /**
     * Constant for possible value of STP extensions RSTP Port Role
     * @see rstpPortRole()
     */
    const STP_X_RSTP_PORT_ROLE_ALTERNATE = 4;

    /**
     * Constant for possible value of STP extensions RSTP Port Role
     * @see rstpPortRole()
     */
    const STP_X_RSTP_PORT_ROLE_BACKUP = 5;

    /**
     * Constant for possible value of STP extensions RSTP Port Role
     * @see rstpPortRole()
     */
    const STP_X_RSTP_PORT_ROLE_BOUNDARY = 6;

    /**
     * Constant for possible value of STP extensions RSTP Port Role
     * @see rstpPortRole()
     */
    const STP_X_RSTP_PORT_ROLE_MASTER = 6;

    /**
     * Text representation of STP extensions RSTP Port Roles
     *
     * @see rstpPortRole()
     * @var array Text representations of STP extensions RSTP Port Role.
     */
    public static $STP_X_RSTP_PORT_ROLES = array(
        self::STP_X_RSTP_PORT_ROLE_DISABLED    => 'disabled',
        self::STP_X_RSTP_PORT_ROLE_ROOT        => 'root',
        self::STP_X_RSTP_PORT_ROLE_DESIGNATED  => 'designated',
        self::STP_X_RSTP_PORT_ROLE_ALTERNATE   => 'alternate',
        self::STP_X_RSTP_PORT_ROLE_BACKUP      => 'backUp',
        self::STP_X_RSTP_PORT_ROLE_BOUNDARY    => 'boundary',
        self::STP_X_RSTP_PORT_ROLE_MASTER      => 'master'
    );

    /**
     * Array of port states that indicate traffic is/can pass
     * @var Array of port states that indicate traffic is/can pass
     */
    public static $STP_X_RSTP_PASSING_PORT_ROLES = array(
        self::STP_X_RSTP_PORT_ROLE_ROOT        => 'root',
        self::STP_X_RSTP_PORT_ROLE_DESIGNATED  => 'designated'
    );

    /**
     * Get the device's RSTP port roles (by given vlan id)
     *
     * Only ports participating in RSTP for the given VLAN id are returned.
     *
     * This function will also convert STP port IDs to the device proper port IDs.
     * E.g. sample output:
     *
     * Array
     * (
     *    [10101] => 3
     *    [10103] => 3
     *    [10105] => 3
     *    [5048] => 2
     * )
     *
     *
     * @see $STP_X_RSTP_PORT_ROLES
     * @see STP_X_RSTP_PORT_ROLE_ROOT and others
     *
     * @param int $vid The RSTP VLAN ID to query port roles for
     * @param boolean $translate If true, return the string representation via self::$STP_X_RSTP_PORT_ROLES
     * @return array The device's RSTP port roles (by given vlan id)
     */
    public function portRoles( $vid, $translate = false )
    {
        $roles = $this->getSNMP()->walk1d( self::OID_STP_X_RSTP_PORT_ROLE . ".{$vid}" );

        // convert STP port IDs to switch port IDs
        $croles = array();
        $basePortIfIndexes = $this->getSNMP()->useBridge()->basePortIfIndexes();
        $relPosToAliases   = $this->getSNMP()->useEntity()->relPosToAlias();
        foreach( $roles as $k => $v )
        {
            if( isset( $basePortIfIndexes[ $k ] ) )
                $croles[ $basePortIfIndexes[ $k ] ] = $v;
            else if( isset( $relPosToAliases[ $k ] ) )
            {
                // and and get port ID from MIBS\Entity
                // TODO Find a better way to translate these?
                $croles[ $relPosToAliases[ $k ] ] = $v;
            }
            else
                $croles[ 'UNKNOWN-' . $k ] = $v;
        }

        if( !$translate )
            return $croles;

        return $this->getSNMP()->translate( $croles, self::$STP_X_RSTP_PORT_ROLES );
    }



}
