<?php defined('SYSPATH') or die('No direct access allowed.');

/**
 *
 * @package    PTA
 * @subpackage Library
 * @category   Models
 * @author     Deon George
 * @copyright  (c) 2010 phpTSMadmin Development Team
 * @license    http://phptsmadmin.sf.net/license.html
 */
class Model_LIBRARY extends ORMTSM {
	protected $_table_name = 'LIBRARIES';
	protected $_primary_key = 'LIBRARY_NAME';
	protected $_sorting = array(
		'LIBRARY_NAME'=>'ASC',
	);

	// Store our show slots data
	private $slots;
	private $storagepools = array();

	protected $_has_one = array(
	);
	protected $_has_many = array(
		'DRIVE'=>array('foreign_key'=>'LIBRARY_NAME','far_key'=>'LIBRARY_NAME'),
		'PATH'=>array('foreign_key'=>'DESTINATION_NAME','far_key'=>'LIBRARY_NAME'),
		'DEVCLASSES'=>array('foreign_key'=>'LIBRARY_NAME','far_key'=>'LIBRARY_NAME'),
	);

	public function slots() {
		return $this->slots ? $this->slots : $this->slots = DB::query(Database::SHOW,'SHOW SLOTS '.$this)->execute();
	}

	// Return a list of scratch volumes
	public function scratch() {
		$return = array();

		foreach ($this->slots() as $slot)
			if ($slot->status == 'Allocated' AND $slot->LIBVOLUME->usage() == 'scratch')
				array_push($return,$slot->LIBVOLUME->VOLUME);

		return $return;
	}

	// Return a list of volumes that are readonly
	public function readonly() {
		$return = array();

		foreach ($this->slots() as $slot)
			if ($slot->LIBVOLUME->VOLUME->ACCESS == 'READONLY')
				array_push($return,$slot->LIBVOLUME->VOLUME);

		return $return;
	}

	// Return the number of slots that are empty.
	public function numemptyslot() {
		return $this->slots->Slots-$this->slots->Changers-count($this->slots);
	}

	// Return the slots that are used, but not checked in.
	public function notcheckedin() {
		$return = array();

		foreach ($this->slots() as $slot)
			if ($slot->status == 'Full')
				array_push($return,$slot);

		return $return;
	}

	// Return the device classes that use this library.
	public function devclasses() {
		return $this->DEVCLASSES->where('LIBRARY_NAME','=',$this)->find_all();
	}

	// Return a list of storage pools that potentially use this library.
	public function storagepools() {
		if (! $this->storagepools)
			foreach ($this->devclasses() as $dco)
				foreach ($dco->STGPOOL->find_all() as $spo)
					array_push($this->storagepools,$spo);

		return $this->storagepools;
	}

	public function storagepoolstype($type) {
		$result = array();

		foreach ($this->storagepools() as $spo)
			if ($spo->POOLTYPE == $type)
				array_push($result,$spo);

		return $result;
	}

	// Return a list of volumes
	// $ptype is pool type (PRIMARY,ACTIVE,COPY)
	// @param $inout IN|OUT of the library
	// @param $status volume status FULL|FILLING|PENDING|EMPTY
	// @note This is an intensive method that needs caching.
	public function volstype($type,$inout,$status) {
		static $CACHE = array();
		$ainout = array('in','out');
		$astatus = array('FULL','FILLING','PENDING','EMPTY');

		if (! isset($CACHE[__METHOD__][$type]))
			foreach ($this->storagepoolstype($type) as $spo)
				foreach ($ainout as $cinout)
					foreach ($astatus as $cstatus) {
						if (! isset($CACHE[__METHOD__][$spo->POOLTYPE][$cinout][$cstatus]))
							$CACHE[__METHOD__][$spo->POOLTYPE][$cinout][$cstatus] = array();

						$CACHE[__METHOD__][$spo->POOLTYPE][$cinout][$cstatus] =
							array_merge($CACHE[__METHOD__][$spo->POOLTYPE][$cinout][$cstatus],$spo->libvolstype($cinout,$cstatus));
					}

		return isset($CACHE[__METHOD__][$type][$inout][$status]) ? $CACHE[__METHOD__][$type][$inout][$status] : array();
	}

	public function volsnotinlib() {
		$result = array();

		foreach ($this->storagepools() as $spo)
			foreach ($spo->VOLUME->find_all() as $vo)
				if ($vo->MEDIA->STATUS != 'MOUNTABLEINLIB')
					array_push($result,$vo);

		Sort::masort($result,'VOLUME_NAME');
		return $result;
	}
}
?>