fannie/classlib2.0/data/models/op/InventoryCacheModel.php
<?php
/*******************************************************************************
Copyright 2015 Whole Foods Co-op
This file is part of CORE-POS.
IT CORE is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
IT CORE is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
in the file license.txt along with IT CORE; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*********************************************************************************/
/**
@class InventoryCacheModel
*/
class InventoryCacheModel extends BasicModel
{
protected $name = "InventoryCache";
protected $preferred_db = 'op';
protected $columns = array(
'upc' => array('type'=>'VARCHAR(13)', 'primary_key'=>true),
'storeID' => array('type'=>'INT', 'primary_key'=>true),
'cacheStart' => array('type'=>'DATETIME'),
'cacheEnd' => array('type'=>'DATETIME'),
'baseCount' => array('type'=>'DOUBLE', 'default'=>0),
'ordered' => array('type'=>'DECIMAL(10,2)'),
'sold' => array('type'=>'DECIMAL(10,2)'),
'shrunk' => array('type'=>'DECIMAL(10,2)', 'default'=>0),
'onHand' => array('type'=>'DECIMAL(10,2)'),
'negative' => array('type'=>'TINYINT', 'default'=>0),
);
public function __construct($con)
{
// change uniqueness constraint in HQ mode
if (FannieConfig::config('STORE_MODE') == 'HQ') {
$this->unique = array('upc', 'storeID');
}
parent::__construct($con);
}
private static $orderStmt = null;
private static function orderStatement($dbc)
{
if (self::$orderStmt === null) {
self::$orderStmt = $dbc->prepare('
SELECT
SUM(CASE WHEN receivedQty IS NULL THEN caseSize*quantity ELSE receivedQty END) AS qty
FROM PurchaseOrderItems AS i
INNER JOIN PurchaseOrder AS o ON i.orderID=o.orderID
WHERE internalUPC=?
AND placedDate IS NOT NULL
AND storeID=?
AND i.isSpecialOrder = 0
AND o.inventoryIgnore = 0
AND (placedDate >= ? OR receivedDate >= ?)');
/** Allow negative quantities?
AND (i.quantity > 0 OR (i.receivedQty IS NOT NULL AND i.receivedQty > 0))
AND (i.receivedQty > 0 OR i.receivedQty IS NULL)
*/
}
return self::$orderStmt;
}
/**
* Lookup un-received line items within orders that have been received
* The item's "ordered" quantity is incremented immediately when an order
* is placed so inventory is aware of in-transit orders. However, if the
* receiving process scans items anything that was out of stock won't
* get scanned. Once some items in a given order have been received it
* makes sense to conclude anything NOT received in the same order is
* not actually present and should not count toward inventory's
* "ordered" quantity.
*/
private static function reduceUnReceived($dbc, $upc, $storeID, $date)
{
$receivedP = $dbc->prepare('SELECT receivedQty FROM PurchaseOrderItems WHERE orderID=? AND receivedQty IS NOT NULL');
$reduction = 0;
$getP = $dbc->prepare('SELECT i.orderID, SUM(caseSize*quantity) AS ordered
FROM PurchaseOrderItems AS i
INNER JOIN PurchaseOrder AS o ON i.orderID=o.orderID
WHERE internalUPC=?
AND storeID=?
AND i.isSpecialOrder = 0
AND o.inventoryIgnore = 0
AND i.receivedQty IS NULL
AND placedDate >= ?
GROUP BY i.orderID');
$getR = $dbc->execute($getP, array($upc, $storeID, $date));
while ($getW = $dbc->fetchRow($getR)) {
$received = $dbc->getValue($receivedP, array($getW['orderID']));
if ($received !== false) {
$reduction += $getW['ordered'];
}
}
return $reduction;
}
public static function calculateOrdered($dbc, $upc, $storeID, $date)
{
$orderP = self::orderStatement($dbc);
$ordered = $dbc->getValue($orderP, array($upc, $storeID, $date, $date));
$ordered -= self::reduceUnReceived($dbc, $upc, $storeID, $date);
return $ordered >= 0 ? $ordered : 0;
}
public function recalculateOrdered($upc, $storeID)
{
$obj = new InventoryCacheModel($this->connection);
$obj->upc($upc);
$obj->storeID($storeID);
if ($obj->load()) {
if ($obj->negative()) {
/**
* If the cache record is flagged as having an underlying negative on-hand,
* create a new most recent count record with a zero count and keeping
* the current par. This record is backdated by 30 seconds so that if
* this is triggered by flagging a new order as "placed", that order's timestamp
* will be ahead of this new count and will add to the on-hand total
*/
$parP = $this->connection->prepare("SELECT par FROM InventoryCounts WHERE upc=? AND storeID=? AND mostRecent=1");
$par = $this->connection->getValue($parP, array($upc, $storeID));
$clearP = $this->connection->prepare("UPDATE InventoryCounts SET mostRecent=0 WHERE upc=? AND storeID=?");
$this->connection->execute($clearP, array($upc, $storeID));
$count = new InventoryCountsModel($this->connection);
$count->upc($upc);
$count->storeID($storeID);
$count->count(0);
$count->countDate(date('Y-m-d H:i:s', time() - 30));
$count->mostRecent(1);
$count->uid(0);
$count->par($par);
$count->save();
$obj->negative(0);
$obj->baseCount(0);
$obj->sold(0);
$obj->shrunk(0);
$obj->cacheStart($count->countDate());
}
$orders = InventoryCacheModel::calculateOrdered($this->connection, $upc, $storeID, $obj->cacheStart());
$obj->ordered($orders);
$obj->onHand($obj->baseCount() + $obj->ordered() - $obj->sold() - $obj->shrunk());
$obj->save();
}
}
public function doc()
{
return '
Use:
InventoryCache stores a snapshot of inventory activity to
avoid real-time calculation across large chunks of data.
* baseCount is the amount present at the last count
* ordered is the amount ordered since the last count
and can be re-calculated from purchase orders
* sold is the amount sold since the last count
and can be re-calculated from transaction data
* shrunk is the amount shrunk since the last count
and can be re-calculated from transaction data
* onHand is baseCount + ordered - sold - shrunk
';
}
}